DOCSLIB.ORG

Using Exogenous Hormone Application to Suppress Axillary Shoot Development in Tobacco

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Using Exogenous Hormone Application to Suppress Axillary Shoot Development in Tobacco University of Kentucky UKnowledge Theses and Dissertations--Plant and Soil Sciences Plant and Soil Sciences 2017 USING EXOGENOUS HORMONE APPLICATION TO SUPPRESS AXILLARY SHOOT DEVELOPMENT IN TOBACCO W. Jesse Carmack University of Kentucky, [email protected] Digital Object Identifier: https://doi.org/10.13023/ETD.2017.075 Right click to open a feedback form in a new tab to let us know how this document benefits ou.y Recommended Citation Carmack, W. Jesse, "USING EXOGENOUS HORMONE APPLICATION TO SUPPRESS AXILLARY SHOOT DEVELOPMENT IN TOBACCO" (2017). Theses and Dissertations--Plant and Soil Sciences. 88. https://uknowledge.uky.edu/pss_etds/88 This Master's Thesis is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in Theses and Dissertations--Plant and Soil Sciences by an authorized administrator of UKnowledge. For more information, please contact [email protected]. STUDENT AGREEMENT: I represent that my thesis or dissertation and abstract are my original work. Proper attribution has been given to all outside sources. I understand that I am solely responsible for obtaining any needed copyright permissions. I have obtained needed written permission statement(s) from the owner(s) of each third-party copyrighted matter to be included in my work, allowing electronic distribution (if such use is not permitted by the fair use doctrine) which will be submitted to UKnowledge as Additional File. I hereby grant to The University of Kentucky and its agents the irrevocable, non-exclusive, and royalty-free license to archive and make accessible my work in whole or in part in all forms of media, now or hereafter known. I agree that the document mentioned above may be made available immediately for worldwide access unless an embargo applies. I retain all other ownership rights to the copyright of my work. I also retain the right to use in future works (such as articles or books) all or part of my work. I understand that I am free to register the copyright to my work. REVIEW, APPROVAL AND ACCEPTANCE The document mentioned above has been reviewed and accepted by the student’s advisor, on behalf of the advisory committee, and by the Director of Graduate Studies (DGS), on behalf of the program; we verify that this is the final, approved version of the student’s thesis including all changes required by the advisory committee. The undersigned agree to abide by the statements above. W. Jesse Carmack, Student Dr. Robert D. Miller, Major Professor Dr. Mark S. Coyne, Director of Graduate Studies USING EXOGENOUS HORMONE APPLICATION TO SUPPRESS AXILLARY SHOOT DEVELOPMENT IN TOBACCO THESIS A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in the College of Agriculture, Food and Environment at the University of Kentucky By W. Jesse Carmack Director: Dr. Robert D. Miller, Professor of IPSS Lexington, KY 2017 Copyright © W. Jesse Carmack 2017 ABSTRACT OF THESIS USING EXOGENOUS HORMONE APPLICATION TO SUPRESS AXILLARY SHOOT DEVELOPMENT IN TOBACCO The variability in the number of basal axillary shoots (ground suckers) among all tobacco (Nicotiana tabacum L.) varieties, has increased since the hydroponic transplant production system became the standard. The larger root ball of hydroponically produced transplants compared to traditionally produced transplants potentially generates a difference in the ratio of auxin (inhibits axillary shoot formation) to cytokinin (promotes lateral branching), that induces basal axillary shoot development. Starting in 2014, studies were conducted to investigate whether the addition of synthetic auxins or cytokinins to hydroponic transplant production could prevent ground sucker formation. Different tobacco cultivars, with high or low ground sucker potential, were evaluated in extensive dilution trials using the synthetic auxin 1-Naphthalene acetic acid (NAA) or cytokinin 6-Benzylaminopurine (BA). Initial results indicated that a 2nM concentration of NAA significantly reduced axillary shoots in the known ground sucker producer, compared to the control. From these results, NAA and BA was added to the hydroponic transplant solution at concentrations in the range of 2-50 nM for the 2015 field trials; however, these studies failed to confirm the preliminary greenhouse findings. Nonetheless, it was clear from the 2015 field results that the varieties used are genetically different from one another in ground sucker potential. Following the 2015 field study, an additional greenhouse experiment using higher concentrations of NAA showed that a 1µM NAA hydroponic solution reduced ground sucker number. From this, a second set of field studies were conducted in 2016 using the higher rates of NAA. Burley variety TN86 and dark variety KTD6 (known ground sucker producers) were used in the 2016 studies. Five hormone treatments (NAA 500-5000 nM and an untreated control) and five tray (128, 200, 242, 288, and 338 cells per tray) were evaluated. Tray size was added to determine if increasing transplant root ball size was correlated with an increase in ground suckers. Although statistically significant differences were found among treatments applied to both TN86 and KTD6, there was no treatment that consistently reduced ground sucker numbers. No notable trend in ground sucker number indicates that an increase in the root ball size of tobacco transplants produced in the float bed system compared to traditionally produced transplants is not the sole cause of increased ground sucker number. In conclusion, from the results of the entire study, it is apparent that an exogenous auxin application (within the conditions used in this study) will not consistently or predictably suppress ground sucker development in tobacco; perhaps the only consistency in the data is how inconsistent ground sucker formation is from environment to environment, and variety to variety. KEYWORDS: Tobacco, Auxin, Cytokinin, Apical Dominance, Ground Suckers W. Jesse Carmack March 14, 2017 USING EXOGENOUS HORMONE APPLICATION TO SUPRESS AXILLARY SHOOT DEVELOPMENT IN TOBACCO By W. Jesse Carmack Dr. Robert D. Miller Director of Thesis Dr. Mark S. Coyne Director of Graduate Studies March 14, 2014 TABLE OF CONTENTS List of Tables ..................................................................................................................... iv List of Figures .................................................................................................................... vi Chapter One: Introduction ...................................................................................................1 Chapter Two: Literature Review Auxin............................................................................................................................4 Cytokinin .....................................................................................................................9 Apical Dominance .....................................................................................................10 Appeal of Preventing Basal Axillary Shoots in Tobacco ..........................................14 Current Sucker Control Methods ...............................................................................16 Transplant Production ................................................................................................17 Chapter Three: Materials and Methods In vitro Evaluation of the Effect of Auxin and Cytokinin on Tobacco Seedlings .....19 Greenhouse Evaluation of Tobacco Transplants Produced in Presence of PGRs .....21 Quantification of Basal Axillary Shoots on Field Grown Tobacco ...........................23 Chapter Four: Results and Discussion In vitro Evaluation of the Effect of Auxin and Cytokinin on Tobacco Seedlings .....27 Summary of In vitro Findings ............................................................................44 Greenhouse Evaluation of the Effect of Exogenous NAA and BA on Tobacco .......47 Summary of Initial Greenhouse Evaluations .....................................................71 2015 Field Evaluation of the Effect of Exogenous NAA and BA on Tobacco .........73 2015 Field Summary ..........................................................................................81 Greenhouse Evaluation of the Effect of Initial Lab Concentrations on TN86 ..........85 Summary of Second Greenhouse Evaluation ....................................................98 2016 Field Evaluation of the Effect of Exogenous Auxin and Tray Size ..................98 2016 Field Summary ........................................................................................114 Chapter Five: Summary and Conclusions .......................................................................115 Literature Cited ................................................................................................................120 Vita ...................................................................................................................................125 iii LIST OF TABLES Table 1 Analysis of Variance for initial in vitro root length experiment ...........................28 Table 2 Analysis of Variance for the second in vitro root length experiment ...................33 Table 3 Analysis of Variance for in vitro CFR experiment ..............................................39 Table 4 Analysis of Variance for in vitro root fresh weight (g) ........................................45 Table 5 Analysis of Variance for greenhouse leaf number
Load more

Recommended publications
  • Abstracts from the 9Th Biennial Scientific Meeting of The
    International Journal of Pediatric Endocrinology 2017, 2017(Suppl 1):15 DOI 10.1186/s13633-017-0054-x MEETING ABSTRACTS Open Access Abstracts from the 9th Biennial Scientific Meeting of the Asia Pacific Paediatric Endocrine Society (APPES) and the 50th Annual Meeting of the Japanese Society for Pediatric Endocrinology (JSPE) Tokyo, Japan. 17-20 November 2016 Published: 28 Dec 2017 PS1 Heritable forms of primary bone fragility in children typically lead to Fat fate and disease - from science to global policy a clinical diagnosis of either osteogenesis imperfecta (OI) or juvenile Peter Gluckman osteoporosis (JO). OI is usually caused by dominant mutations affect- Office of Chief Science Advsor to the Prime Minister ing one of the two genes that code for two collagen type I, but a re- International Journal of Pediatric Endocrinology 2017, 2017(Suppl 1):PS1 cessive form of OI is present in 5-10% of individuals with a clinical diagnosis of OI. Most of the involved genes code for proteins that Attempts to deal with the obesity epidemic based solely on adult be- play a role in the processing of collagen type I protein (BMP1, havioural change have been rather disappointing. Indeed the evidence CREB3L1, CRTAP, LEPRE1, P4HB, PPIB, FKBP10, PLOD2, SERPINF1, that biological, developmental and contextual factors are operating SERPINH1, SEC24D, SPARC, from the earliest stages in development and indeed across generations TMEM38B), or interfere with osteoblast function (SP7, WNT1). Specific is compelling. The marked individual differences in the sensitivity to the phenotypes are caused by mutations in SERPINF1 (recessive OI type obesogenic environment need to be understood at both the individual VI), P4HB (Cole-Carpenter syndrome) and SEC24D (‘Cole-Carpenter and population level.
    [Show full text]
  • The Control of Shoot Branching: an Example of Plant Information Processing
    Plant, Cell and Environment (2009) 32, 694–703 doi: 10.1111/j.1365-3040.2009.01930.x The control of shoot branching: an example of plant information processing OTTOLINE LEYSER Department of Biology, Area 11, University of York, York YO10 5YW, UK ABSTRACT the apical–basal axis defined by the establishment of the shoot apical meristem at one end, and the root apical mer- Throughout their life cycle, plants adjust their body plan istem at the other. Post-embryonically, the meristems give to suit the environmental conditions in which they are rise to the entire shoot and root systems, respectively. Fur- growing. A good example of this is in the regulation of thermore, the tissues they establish can produce secondary shoot branching. Axillary meristems laid down in each leaf meristems, which if activated can produce entirely new formed from the primary shoot apical meristem can remain axes of growth with the same developmental potential as dormant, or activate to produce a branch. The decision the primary root or shoot from which they were derived. whether to activate an axillary meristem involves the assess- Thus, the body plan of a plant is determined continuously ment of a wide range of external environmental, internal throughout its life cycle, allowing it to be exquisitely envi- physiological and developmental factors. Much of this infor- ronmentally responsive. Plants can alter their body plan to mation is conveyed to the axillary meristem via a network suit their environment, and thus the environmentally regu- of interacting hormonal signals that can integrate inputs lated development of new growth axes is functionally from diverse sources, combining multiple local signals to equivalent to environmentally regulated animal behav- generate a rich source of systemically transmitted informa- iours.
    [Show full text]
  • Specification and Maintenance of the Floral Meristem: Interactions Between Positively- Acting Promoters of Flowering and Negative Regulators
    SPECIAL SECTION: EMBRYOLOGY OF FLOWERING PLANTS Specification and maintenance of the floral meristem: interactions between positively- acting promoters of flowering and negative regulators Usha Vijayraghavan1,*, Kalika Prasad1 and Elliot Meyerowitz2,* 1Department of MCB, Indian Institute of Science, Bangalore 560 012, India 2Division of Biology 156–29, California Institute of Technology, Pasadena, CA 91125, USA meristems that give rise to modified leaves – whorls of A combination of environmental factors and endoge- nous cues trigger floral meristem initiation on the sterile organs (sepals and petals) and reproductive organs flanks of the shoot meristem. A plethora of regulatory (stamens and carpels). In this review we focus on mecha- genes have been implicated in this process. They func- nisms by which interactions between positive and nega- tion either as activators or as repressors of floral ini- tive regulators together pattern floral meristems in the tiation. This review describes the mode of their action model eudicot species A. thaliana. in a regulatory network that ensures the correct temporal and spatial control of floral meristem specification, its maintenance and determinate development. Maintenance of the shoot apical meristem and transitions in lateral meristem fate Keywords: Arabidopsis thaliana, floral activators, flo- ral mesitem specification, floral repressors. The maintenance of stem cells is brought about, at least in part, by a regulatory feedback loop between the ho- THE angiosperm embryo has a well established apical- meodomain transcription factor WUSCHEL (WUS) and basal/polar axis defined by the positions of the root and genes of the CLAVATA (CLV) signaling pathway2. WUS shoot meristems. Besides this, a basic radial pattern is is expressed in the organizing centre and confers a stem also established during embryogenesis.
    [Show full text]
  • Propagation of Zingiberaceae and Heliconiaceae1
    14 Sociedade Brasileira de Floricultura e Plantas Ornamentais Propagation of Zingiberaceae and Heliconiaceae1 RICHARD A.CRILEY Department of Horticulture, University of Hawaii, Honolulu, Hawaii USA 96822 Increased interest in tropical cut vegetative growths will produce plants flower export in developing nations has identical to the parent. A few lesser gen- increased the demand for clean planting era bear aerial bulbil-like structures in stock. The most popular items have been bract axils. various gingers (Alpinia, Curcuma, and Heliconia) . This paper reviews seed and Seed vegetative methods of propagation for Self-incompatibility has been re- each group. Auxins such as IBA and ported in Costus (WOOD, 1992), Alpinia NAA enhanced root development on aerial purpurata (HIRANO, 1991), and Zingiber offshoots of Alpinia at the rate 500 ppm zerumbet (IKEDA & T ANA BE, 1989); while while the cytokinin, PBA, enhanced ba- other gingers set seed readily. sal shoot development at 100 ppm. Rhi- zomes of Heliconia survived treatment in The seeds of Alpinia, Etlingera, and Hedychium are borne in round or elon- 4811 C hot water for periods up to 1 hour gated capsules which split when the seeds and 5011 C up to 30 minutes in an experi- are ripe and ready for dispersai. ln some ment to determine their tolerance to tem- species a fleshy aril, bright orange or scar- pera tures for eradicating nematodes. Iet in color, covers .the seed, perhaps to Pseudostems soaks in 400 mg/LN-6- make it more attractive to birds. The seeds benzylaminopurine improved basal bud of gingers are black, about 3 mm in length break on heliconia rhizomes.
    [Show full text]
  • Clemson University Plant Problem Clinic, Nematode Assay Lab and Molecular Plant Pathogen Detection Lab Semi-Annual Report for 2013 (January – June)
    Clemson University Plant Problem Clinic, Nematode Assay Lab and Molecular Plant Pathogen Detection Lab Semi-Annual Report For 2013 (January – June) 1 Part 1: General Information Information 3 Diagnostic Input 4 Consultant Input 4 Monthly Sample Numbers 2013 5 Monthly Sample Numbers since 2007 6 Yearly Sample Numbers since 2007 7 Nematode Monthly Sample Numbers 2013 8 Nematode Yearly Sample Numbers since 2003 9 MPPD Monthly Sample Numbers 2013 10 MPPD Yearly Sample Numbers since 2010 11 Client Types 12 Submitter Types 13 Diagnoses/Identifications Requested 14 Sample Categories 15 Sample State Origin 16 Methods Used 17 Part 2: Diagnoses and Identifications Ornamentals and Trees 18 Turf 30 Vegetables and Herbs 34 Fruits and Nuts 36 Field Crops, Pastures and Forage 38 Plant and Mushroom Identifications 39 Insect Identifications 40 Regulatory Concern 42 2 Clemson University Plant Problem Clinic, Nematode Assay Lab and Molecular Plant Pathogen Detection Lab Semi-Annual Report For 2013 (January-June) The Plant Problem Clinic serves the people of South Carolina as a multidisciplinary lab that provides diagnoses of plant diseases and identifications of weeds and insect pests of plants and structures. Plant pathogens, insect pests and weeds can significantly reduce plant growth and development. Household insects can infest our food and cause structural damage to our homes. The Plant Problem Clinic addresses these problems by providing identifications, followed by management recommendations. The Clinic also serves as an information resource for Clemson University Extension, teaching, regulatory and research personnel. As a part of the Department of Plant Industry in Regulatory Services, the Plant Problem Clinic also helps to detect and document new plant pests and diseases in South Carolina.
    [Show full text]
  • AXR1 Acts After Lateral Bud Formation to Inhibit Lateral Bud Growth in Arabidopsis
    This is a repository copy of AXR1 acts after lateral bud formation to inhibit lateral bud growth in Arabidopsis. White Rose Research Online URL for this paper: https://eprints.whiterose.ac.uk/262/ Article: Stirnberg, P., Leyser, O. and Chatfield, S.P. (1999) AXR1 acts after lateral bud formation to inhibit lateral bud growth in Arabidopsis. Plant Physiology. pp. 839-847. ISSN 0032-0889 Reuse Items deposited in White Rose Research Online are protected by copyright, with all rights reserved unless indicated otherwise. They may be downloaded and/or printed for private study, or other acts as permitted by national copyright laws. The publisher or other rights holders may allow further reproduction and re-use of the full text version. This is indicated by the licence information on the White Rose Research Online record for the item. Takedown If you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing [email protected] including the URL of the record and the reason for the withdrawal request. [email protected] https://eprints.whiterose.ac.uk/ Plant Physiology, November 1999, Vol. 121, pp. 839–847, www.plantphysiol.org © 1999 American Society of Plant Physiologists AXR1 Acts after Lateral Bud Formation to Inhibit Lateral Bud Growth in Arabidopsis1 Petra Stirnberg, Steven P. Chatfield, and H.M. Ottoline Leyser* Department of Biology, University of York, P.O. Box 373, York YO10 5YW, United Kingdom Several mutants with altered auxin sensitivity have been The AXR1 gene of Arabidopsis is required for many auxin re- produced in Arabidopsis.
    [Show full text]
  • Foliar and Shoot Allometry of Pollarded Black Locust, Robinia Pseudoacacia L
    Agroforestry Systems (2006) 68:37–42 Ó Springer 2006 DOI 10.1007/s10457-006-0001-y -1 Foliar and shoot allometry of pollarded black locust, Robinia pseudoacacia L. D.M. Burner1,*, D.H. Pote1 and A. Ares2 1United States Department of Agriculture, Agricultural Research Service, Dale Bumpers Small Farms Research Center, 6883 South State Highway 23, Booneville, AR 72927, USA; 2Weyerhaeuser Company, 505 N. Pearl Street, Centralia, WA 98531, USA; *Author for correspondence (e-mail: [email protected]; phone: +1-479-675-3834; fax: +1-479-675-2940) Received 22 June 2004; accepted in revised form 17 January 2006 Key words: Allometric relationship, Foliar mass, Nonlinear analysis, Shoot diameter, Shoot mass Abstract Browse of multipurpose tree species such as black locust could be used to broaden grazing options, but the temporal distribution of foliage has not been adequately studied. Our objective was to determine effects of harvest date, P fertilization (0 and 600 kg haÀ1 yrÀ1), and pollard height (shoots clipped at 5-, 50-, and 100- cm above ground) on foliar and shoot allometry of black locust. The experiment was conducted on a naturally regenerated 2-yr-old black locust stand (15,000 trees haÀ1). Basal shoot diameter and foliar mass were measured monthly in June to October 2002 and 2003. Foliar and shoot dry mass (Y) was estimated from basal shoot diameter (D) by the function Y = aDb, with regression explaining ‡95% of variance. Allometry of foliar mass was affected by harvest date, increasing at a greater rate with D in September than in June or July, but not by P fertilization or pollard height.
    [Show full text]
  • Random Coefficient Repeated Measures Models
    (Entry for Encyclopaedia of Biostatistics, Armitage, P., & Colton,T. (Eds.), 1998, Wiley.) Random coefficient repeated measures models by Harvey Goldstein Institute of Education London, WC1H 0AL [email protected] Introduction This section is concerned with modelling data where measurements of one or more attributes are repeated on the same set of individuals over time. Typical applications are to the modelling of anthropometric growth of children or animals. The model specification will be developed for the case where a single continuous measurement is made on several occasions for a sample. This will then be extended to consider the case of multiple measurements at each time point and mention will be made of extensions to latent variable models and to discrete response data. To begin with we look at the simple, restricted, data structure where there are a fixed number of measurement occasions and each individual has a measurement at each occasion. Multivariate models Consider the data matrix of responses Individual Occasion 1 Occasion 2 Occasion 3 Occasion 4 1 y11 y21 y31 y41 2 y12 y22 y32 y42 3 y13 y23 y33 y43 The first subscript refers to occasion and the second to individual. We assume multivariate normality and so for the response vector we have initially YN~(,)µ Σ (1) This constitutes a null model and in general we will wish to include further variables, notably age or time. Suppose we wish to express the response, say a weight measurement, as a linear function of time (t) measured at each occasion. We may then write =+β β +ε ytij01 j j ij ij (2) where we allow the intercept and average growth rate to vary across individuals.
    [Show full text]
  • Inhibition of Lateral Shoot Formation by RNA Interference and Chemically Induced Mutations to Genes Expressed in the Axillary Meristem of Nicotiana Tabacum L
    Hamano et al. BMC Plant Biol (2021) 21:236 https://doi.org/10.1186/s12870-021-03008-3 RESEARCH ARTICLE Open Access Inhibition of lateral shoot formation by RNA interference and chemically induced mutations to genes expressed in the axillary meristem of Nicotiana tabacum L. Kaori Hamano* , Seiki Sato, Masao Arai, Yuta Negishi, Takashi Nakamura, Tomoyuki Komatsu, Tsuyoshi Naragino and Shoichi Suzuki Abstract Background: Lateral branches vigorously proliferate in tobacco after the topping of the inforescence portions of stems for the maturation of the leaves to be harvested. Therefore, tobacco varieties with inhibited lateral shoot forma- tion are highly desired by tobacco farmers. Results: Genetic inhibition of lateral shoot formation was attempted in tobacco. Two groups of genes were exam- ined by RNA interference. The frst group comprised homologs of the genes mediating lateral shoot formation in other plants, whereas the second group included genes highly expressed in axillary bud primordial stages. Although “primary” lateral shoots that grew after the plants were topped of when fower buds emerged were unafected, the growth of “secondary” lateral shoots, which were detected on the abaxial side of the primary lateral shoot base, was signifcantly suppressed in the knock-down lines of NtLs, NtBl1, NtREV, VE7, and VE12. Chemically induced mutations to NtLs, NtBl1, and NtREV similarly inhibited the development of secondary and “tertiary” lateral shoots, but not primary lateral shoots. The mutations to NtLs and NtBl1 were incorporated into an elite variety by backcrossing. The agronomic characteristics of the backcross lines were examined in feld trials conducted in commercial tobacco production regions. The lines were generally suitable for tobacco leaf production and may be useful as new tobacco varieties.
    [Show full text]
  • Environmental Pollution in Urban Environments and Human Biology
    7 Aug 2003 8:27 AR AR196-AN32-06.tex AR196-AN32-06.sgm LaTeX2e(2002/01/18) P1: IKH 10.1146/annurev.anthro.32.061002.093218 Annu. Rev. Anthropol. 2003. 32:111–34 doi: 10.1146/annurev.anthro.32.061002.093218 Copyright c 2003 by Annual Reviews. All rights reserved First published online as a Review in Advance on June 4, 2003 ENVIRONMENTAL POLLUTION IN URBAN ENVIRONMENTS AND HUMAN BIOLOGY Lawrence M. Schell and Melinda Denham Department of Anthropology, University at Albany, State University of New York, 1400 Washington Ave., Albany, New York, 12222; email: [email protected], [email protected] Key Words growth, lead, noise, stress, urbanism ■ Abstract The biocultural approach of anthropologists is well suited to understand the interrelationship of urbanism and human biology. Urbanism is a social construction that has continuously changed and presented novel adaptive challenges to its residents. Urban living today involves several biological challenges, of which one is pollution. Using three different types of pollutants as examples, air pollution, lead, and noise, the impact of pollution on human biology (mortality, morbidity, reproduction, and develop- ment) can be seen. Chronic exposure to low levels of these pollutants has a small impact on the individual, but so many people are exposed to pollution that the effect species- wide is substantial. Also, disproportionate pollutant exposure by socioeconomically disadvantaged groups exacerbates risk of poor health and well being. URBANISM AND HUMAN BIOLOGY Urban growth began slowly several thousand years ago and has accelerated tremen- dously over the past 300 years. By 2006, half of the world’s population will be living in urban places (United Nations 1998).
    [Show full text]
  • The Psychological Burden of Short Stature
    European Journal of Endocrinology (2004) 151 S29–S33 ISSN 0804-4643 The psychological burden of short stature: evidence against Linda D Voss and David E Sandberg1,2 Department of Endocrinology and Metabolism, Peninsula Medical School, Plymouth, UK, 1Departments of Psychiatry and Pediatrics, University of Buffalo, The State University of New York and 2the Women and Children’s Hospital of Buffalo, Buffalo, New York, USA (Correspondence should be addressed to L D Voss, EarlyBird Research Centre, Child Health, Level 12, Derriford Hospital, Plymouth PL6 8DH, UK; Email: [email protected]) Abstract Short stature, per se, is clearly not a disease, but is commonly perceived to be associated with social and psychological disadvantage. The assumption, widely held by pediatricians that short children are likely to be significantly affected by their stature, has been founded largely on older, poorly designed clinic-based studies and laboratory investigations of beliefs about the association between stature and individual characteristics. In contrast, data from more recent and better designed clinic- and commu- nity-based studies show that, in terms of psychosocial functioning, individuals with short stature are largely indistinguishable from their peers, whether in childhood, adolescence or adulthood. Parents and children alike should be reassured by these findings. In the absence of clear pathology, physical or psychological, GH therapy for the short but otherwise normal child raises ethical concerns about so-called ‘cosmetic endocrinology’. European Journal of Endocrinology 151 S29–S33 Introduction that SS constitutes a psychosocial burden (8). This belief is widespread. In a recent survey, 56% of phys- Short stature (SS) may result from an idiopathic icians felt that height impaired emotional well-being deficiency in growth hormone (GH) or be a feature of in children below the 3rd centile (9).
    [Show full text]
  • Absolute Or Relative Measures of Height and Weight&Quest
    European Journal of Clinical Nutrition (2015) 69, 647–648 © 2015 Macmillan Publishers Limited All rights reserved 0954-3007/15 www.nature.com/ejcn EDITORIAL Absolute or relative measures of height and weight? An Editorial European Journal of Clinical Nutrition (2015) 69, 647–648; interpret all individual growth data in the light of one international doi:10.1038/ejcn.2015.70 growth standard? Indian newborns are light and short5 when compared with WHO standards. We are used to explain anthropometric birth data In this volume, Spiegler and coworkers present their work on very from India by unfavourable maternal conditions. But also Indian low-birth weight infants (VLBW), they analysed at what age infants born to modern upper class women are shorter and lighter parents start complementary food in these infants, they deter- than WHO standards, and do not reflect maternal wealth and mined risk factors for early introduction of complementary food caste (Table 1). and they analysed whether the age at introduction of comple- Khadilkar and Khadilkar6 state: ‘The disadvantage of using mentary food influences height or weight at two years of age. The charts such as these (WHO charts) is that they are likely to over study is an important contribution to infant nutrition. But there is diagnose underweight and stunting in a large number of more to the study: the study was performed at the crossroads apparently normal children in the developing countries such as between nutrition and auxology. India’. Not only wealthy Indian children are shorter and lighter Studying nutrition and nutritional intervention on growth than these standards.
    [Show full text]