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Parenchyma Cell Respiration and Survival in Secondary Xylem: Does Metabolic Activity Decline with Cell Age?
Plant, Cell and Environment (2007) 30, 934–943 doi: 10.1111/j.1365-3040.2007.01677.x Parenchyma cell respiration and survival in secondary xylem: does metabolic activity decline with cell age? R. SPICER1 & N. M. HOLBROOK2 1Rowland Institute at Harvard University, 100 Edwin H. Land Boulevard, Cambridge, MA 02142, USA and 2Organismic and Evolutionary Biology, Harvard University, 16 Divinity Avenue, Cambridge, MA 02138, USA ABSTRACT defines (and arguably drives) heartwood formation, a form of tissue senescence during which the oldest, non- Sapwood respiration often declines towards the sapwood/ functional xylem is compartmentalized in the centre of the heartwood boundary, but it is not known if parenchyma stem. The cause of parenchyma cell death is not known, metabolic activity declines with cell age. We measured but evidence for decreased metabolic activity in the inner- sapwood respiration in five temperate species (sapwood age most sapwood has led to a view of parenchyma ageing as range of 5–64 years) and expressed respiration on a live cell a gradual, passive decline in metabolism that terminates in basis by quantifying living parenchyma. We found no effect cell death. of parenchyma age on respiration in two conifers (Pinus Multiple reports suggest that sapwood respiration strobus, Tsuga canadensis), both of which had signifi- declines towards the sapwood/heartwood boundary cant amounts of dead parenchyma in the sapwood. In (Goodwin & Goddard 1940; Higuchi, Shimada & Watanabe angiosperms (Acer rubrum, Fraxinus americana, Quercus 1967; Pruyn, Gartner & Harmon 2002a,b; Pruyn, Harmon & rubra), both bulk tissue and live cell respiration were Gartner 2003; Pruyn, Gartner & Harmon 2005), although reduced by about one-half in the oldest relative to the there have been reports of no change (Bowman et al. -
Does the Distance to Normal Renal Parenchyma (DTNRP) in Nephron-Sparing Surgery for Renal Cell Carcinoma Have an Effect on Survival?
ANTICANCER RESEARCH 25: 1629-1632 (2005) Does the Distance to Normal Renal Parenchyma (DTNRP) in Nephron-sparing Surgery for Renal Cell Carcinoma have an Effect on Survival? Z. AKÇETIN1, V. ZUGOR1, D. ELSÄSSER1, F.S. KRAUSE1, B. LAUSEN2, K.M. SCHROTT1 and D.G. ENGEHAUSEN1 Departments of 1Urology and 2Medical Informatics, Biometry and Epidemiology, University of Erlangen-Nuremberg, Germany Abstract. Background: The effect of the distance to normal renal solitary kidneys. Additionally, organ preservation in the parenchyma (DTNRP) on survival after nephron-sparing surgery presence of an intact contralateral kidney can be performed (NSS) for renal cell cancer (RCC) was analyzed. Additionally, for small localized tumors with nearly equivalent results for the role of T-classification, tumor diameter and tumor grading tumor-specific survival, compared to nephrectomy (1). The was considered. Patients and Methods: NSS was performed on question of whether a small safety margin in intraoperative 126 patients with RCC between 1988 and 2000. Eighty-six patients histology may be adequate for favorable outcome of the were submitted to annual follow-up. These 86 patients were sub- patient constitutes an everyday issue for the practitioner classified into statistical groups according to the distance performing nephron-sparing surgery. In this context, the to normal renal parenchyma (≤ 2mm; > 2mm – ≤ 5mm; clinical impact of defined surgical margin widths for >5 mm), T-classification, tumor diameter (≤ 20mm; > 20mm - avoiding local tumor recurrence and, therefore, improved ≤ 30 mm; >30 mm – ≤ 50mm; >50mm) and tumor grading. survival after nephron-sparing surgery has been discussed The effect of belonging to one of these groups on survival was but still remains controversial. -
Mechanical Stress in the Inner Bark of 15 Tropical Tree Species and The
Mechanical stress in the inner bark of 15 tropical tree species and the relationship with anatomical structure Romain Lehnebach, Léopold Doumerc, Bruno Clair, Tancrède Alméras To cite this version: Romain Lehnebach, Léopold Doumerc, Bruno Clair, Tancrède Alméras. Mechanical stress in the inner bark of 15 tropical tree species and the relationship with anatomical structure. Botany / Botanique, NRC Research Press, 2019, 10.1139/cjb-2018-0224. hal-02368075 HAL Id: hal-02368075 https://hal.archives-ouvertes.fr/hal-02368075 Submitted on 18 Nov 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Mechanical stress in the inner bark of 15 tropical tree species and the relationship with anatomical structure1 Romain Lehnebach, Léopold Doumerc, Bruno Clair, and Tancrède Alméras Abstract: Recent studies have shown that the inner bark is implicated in the postural control of inclined tree stems through the interaction between wood radial growth and tangential expansion of a trellis fiber network in bark. Assessing the taxonomic extent of this mechanism requires a screening of the diversity in bark anatomy and mechanical stress. The mechanical state of bark was measured in 15 tropical tree species from various botanical families on vertical mature trees, and related to the anatomical structure of the bark. -
Tissues and Other Levels of Organization MODULE - 1 Diversity and Evolution of Life
Tissues and Other Levels of Organization MODULE - 1 Diversity and Evolution of Life 5 Notes TISSUES AND OTHER LEVELS OF ORGANIZATION You have just learnt that cell is the fundamental structural and functional unit of organisms and that bodies of organisms are made up of cells of various shapes and sizes. Groups of similar cells aggregate to collectively perform a particular function. Such groups of cells are termed “tissues”. This lesson deals with the various kinds of tissues of plants and animals. OBJECTIVES After completing this lesson, you will be able to : z define tissues; z classify plant tissues; z name the various kinds of plant tissues; z enunciate the tunica corpus theory and histogen theory; z classify animal tissues; z describe the structure and function of various kinds of epithelial tissues; z describe the structure and function of various kinds of connective tissues; z describe the structure and function of muscular tissue; z describe the structure and function of nervous tissue. 5.1 WHAT IS A TISSUE Organs such as stem, and roots in plants, and stomach, heart and lungs in animals are made up of different kinds of tissues. A tissue is a group of cells with a common origin, structure and function. Their common origin means they are derived from the same layer (details in lesson No. 20) of cells in the embryo. Being of a common origin, there are similar in structure and hence perform the same function. Several types of tissues organise to form an organ. Example : Blood, bone, and cartilage are some examples of animal tissues whereas parenchyma, collenchyma, xylem and phloem are different tissues present in the plants. -
Dwarf Mistletoes: Biology, Pathology, and Systematics
This file was created by scanning the printed publication. Errors identified by the software have been corrected; however, some errors may remain. CHAPTER 10 Anatomy of the Dwarf Mistletoe Shoot System Carol A. Wilson and Clyde L. Calvin * In this chapter, we present an overview of the Morphology of Shoots structure of the Arceuthobium shoot system. Anatomical examination reveals that dwarf mistletoes Arceuthobium does not produce shoots immedi are indeed well adapted to a parasitic habit. An exten ately after germination. The endophytic system first sive endophytic system (see chapter 11) interacts develops within the host branch. Oftentimes, the only physiologically with the host to obtain needed evidence of infection is swelling of the tissues near the resources (water, minerals, and photosynthates); and infection site (Scharpf 1967). After 1 to 3 years, the first the shoots provide regulatory and reproductive func shoots are produced (table 2.1). All shoots arise from tions. Beyond specialization of their morphology (Le., the endophytic system and thus are root-borne shoots their leaves are reduced to scales), the dwarf mistle (Groff and Kaplan 1988). In emerging shoots, the toes also show peculiarities of their structure that leaves of adjacent nodes overlap and conceal the stem. reflect their phylogenetic relationships with other As the internodes elongate, stem segments become mistletoes and illustrate a high degree of specialization visible; but the shoot apex remains tightly enclosed by for the parasitic habit. From Arceuthobium globosum, newly developing leaf primordia (fig. 10.lA). Two the largest described species with shoots 70 cm tall oppositely arranged leaves, joined at their bases, occur and 5 cm in diameter, toA. -
Ultrastructural Study on the Formation of Sclereids in the Floating Leaves of Nymphoides Coreana and Nuphar Schimadai
Kuo-HuangBot. Bull. Acad. et al. Sin. — Sclereids(2000) 41: in 283-291Nymphoides and Nuphar 283 Ultrastructural study on the formation of sclereids in the floating leaves of Nymphoides coreana and Nuphar schimadai Ling-Long Kuo-Huang1,2, Su-Hwa Chen1, and Shiang-Jiuun Chen1 1 Department of Botany, National Taiwan University, Taipei, Taiwan, Republic of China (Received December 29, 1999; Accepted April 14, 2000) Abstract. The formation of star-shaped sclereids in the floating leaves of Nymphoides coreana and Nuphar schimadai was studied microscopically. These foliar sclereids were associated with the aerenchyma and found as the form of idioblast. The outer surface of mature sclereids was smooth in Nymphoides, but with many prismatic calcium oxalate crystals in Nuphar. However, the early morphogenesis of these two kinds of sclereids was similar. The sclereid initials were distinguished from the neighboring cells by their distinctly large nucleus. The expanding sclereid initials were constrained by the neighboring cells. Crystal formation in young sclereids of Nuphar started near the cessation of sclereid expansion. The crystals were bounded by crystal sheath and located in crystal chambers between the primary cell wall and plasma membrane. Calcium antimonate precipitates were found, especially on the crystal sheaths as well as between the plasma membrane and the primary cell walls. The crystal chambers have a paracrystalline appearance connected with the crystal sheath and the plasma membrane. After formation of crystals, the secondary wall was deposited and then the crystals became embedded between the primary and secondary walls. The possible functions of the foliage sclereids and the plans for further investigation are discussed. -
Epiparasitism in Phoradendron Durangense and P. Falcatum (Viscaceae) Clyde L
Aliso: A Journal of Systematic and Evolutionary Botany Volume 27 | Issue 1 Article 2 2009 Epiparasitism in Phoradendron durangense and P. falcatum (Viscaceae) Clyde L. Calvin Rancho Santa Ana Botanic Garden, Claremont, California Carol A. Wilson Rancho Santa Ana Botanic Garden, Claremont, California Follow this and additional works at: http://scholarship.claremont.edu/aliso Part of the Botany Commons Recommended Citation Calvin, Clyde L. and Wilson, Carol A. (2009) "Epiparasitism in Phoradendron durangense and P. falcatum (Viscaceae)," Aliso: A Journal of Systematic and Evolutionary Botany: Vol. 27: Iss. 1, Article 2. Available at: http://scholarship.claremont.edu/aliso/vol27/iss1/2 Aliso, 27, pp. 1–12 ’ 2009, Rancho Santa Ana Botanic Garden EPIPARASITISM IN PHORADENDRON DURANGENSE AND P. FALCATUM (VISCACEAE) CLYDE L. CALVIN1 AND CAROL A. WILSON1,2 1Rancho Santa Ana Botanic Garden, 1500 North College Avenue, Claremont, California 91711-3157, USA 2Corresponding author ([email protected]) ABSTRACT Phoradendron, the largest mistletoe genus in the New World, extends from temperate North America to temperate South America. Most species are parasitic on terrestrial hosts, but a few occur only, or primarily, on other species of Phoradendron. We examined relationships among two obligate epiparasites, P. durangense and P. falcatum, and their parasitic hosts. Fruit and seed of both epiparasites were small compared to those of their parasitic hosts. Seed of epiparasites was established on parasitic-host stems, leaves, and inflorescences. Shoots developed from the plumular region or from buds on the holdfast or subjacent tissue. The developing endophytic system initially consisted of multiple separate strands that widened, merged, and often entirely displaced its parasitic host from the cambial cylinder. -
Squamous Cell Carcinoma of the Renal Parenchyma
Zhang et al. BMC Urology (2020) 20:107 https://doi.org/10.1186/s12894-020-00676-5 CASE REPORT Open Access Squamous cell carcinoma of the renal parenchyma presenting as hydronephrosis: a case report and review of the recent literature Xirong Zhang1,2, Yuanfeng Zhang1, Chengguo Ge1, Junyong Zhang1 and Peihe Liang1* Abstract Background: Primary squamous cell carcinoma of the renal parenchyma is extremely rare, only 5 cases were reported. Case presentation: We probably report the fifth case of primary Squamous cell carcinoma (SCC) of the renal parenchyma in a 61-year-old female presenting with intermittent distending pain for 2 months. Contrast-enhanced computed tomography (CECT) revealed hydronephrosis of the right kidney, but a tumor cannot be excluded completely. Finally, nephrectomy was performed, and histological analysis determined that the diagnosis was kidney parenchyma squamous cell carcinoma involving perinephric adipose tissue. Conclusions: The present case emphasizes that it is difficult to make an accurate preoperative diagnosis with the presentation of hidden malignancy, such as hydronephrosis. Keywords: Kidney, Renal parenchyma, Squamous cell carcinoma, Hydronephrosis, Malignancy Background Case presentation Squamous cell carcinoma (SCC) of the renal pelvis is a The patient is a 61-year-old female. After suffering from rare neoplasm, accounting for only 0.5 to 0.8% of malig- intermittent pain in the right flank region for 2 months nant renal tumors [1], SCC of the renal parenchyma is she was referred to the urology department at an outside even less common. A review of the literature shows that hospital. The patient was diagnosed with hydronephrosis only five cases of primary SCC of the renal parenchyma of the right kidney and underwent a right ureteroscopy have been reported to date [2–6]. -
Anatomy of the Underground Parts of Four Echinacea-Species and of Parthenium Integrifolium
Scientia Pharmaceutica (Sci. Pharm.) 69, 237-247 (2001) O Osterreichische Apotheker-Verlagsgesellschaft m.b.H., Wien, Printed in Austria Anatomy of the underground parts of four Echinacea-species and of Parthenium integrifolium R. Langer Institute of Pharmacognosy, University of Vienna Center of Pharmacy, Althanstrasse 14, A - 1090 Vienna, Austria Improved descriptions and detailed drawings of the most important anatomical characters of the roots of Echinacea purpurea (L.) MOENCH,E. angustifolia DC., E. pallida (NuTT.) NUTT.,and of Parfhenium integrifolium L. are presented. The anatomy of the rhizome of E. purpurea, which was detected in commercial samples, and of the root of E. atrorubens NUTT., another known adulteration for pharmaceutically used Echinacea-species, is documented for the first time. The possibilities and limitations of the identification by means of microscopy are discussed. The anatomical differences between the roots of E. angustifolia, E. pallida and E. atrorubens are not sufficient for differentiation, however, root and rhizome of E. purpurea and the root of Parthenium integrifolium appear well characterized. Because of the highly similar anatomy the microscopic proof of identity and purity of crude drugs of Echinacea must be done with uncomminuted material and the examination of cross sections. (Keywords: Echinacea angustifolia, Echinacea atrorubens, Echinacea pallida, Echinacea purpurea, Parthenium integrifolium, Asteraceae, microscopy, anatomy, identification) 1. Introduction The first, and for a long period only, detailed anatomical descriptions of the underground parts of Echinacea were published at the beginning of the last century', '. Due to later changes in the taxonomy within the genus Echinacea, unfortunately the plant sources for these descriptions remain unclear. The increasing interest in Echinacea and the adulterations that had been observed frequently caused Heubl et aL3 in the late eighties to examine the roots of E. -
Response of Avocado Pericarp Tissue to Mechanical Injury
Proc. of Second World Avocado Congress 1992 pp. 485-488 Response of Avocado Pericarp Tissue to Mechanical Injury C. A. Schroeder Dept. of Biology, University of California, Los Angeles, CA 90024, USA Abstract. Mechanical injury to avocado (Persea americana Mill.) pericarp will initiate a meristem and the production of periderm. Injury to tissues deep within the pericarp results in cellular differentiation of parenchyma with various degrees of cell wall thickening. Sclereid-like cells with thick, lignified walls and prominent pits can be formed in tissue normally occupied by thin-walled, oil-filled parenchyma. The unique growth and increase in volume of avocado fruit is characterized by continuous cell division in the pericarp tissue from pollination until fruit maturity. Shortly following fruit set, the parenchymatous cells which comprise the major tissue of the pericarp attain a diameter of approximately 50 //m and then undergo mitosis (Schroeder, 1953). Thus cell size is fairly constant and uniform throughout the fleshy pericarp. Larger fruit therefore have more cells than smaller fruit upon reaching maturity. Mitotic activity throughout the pericarp tissue at all times from anthesis to full fruit size is reflected in the high respiratory behavior of the fruit tissue, which is comparable to that of meristematic tissues in general. One can expect meristematic activity in the pericarp tissue at any point in time during fruit development. This has been demonstrated by the successful grafting of nearly mature avocado fruit. Cutting through the thick pericarp of adjacent fruit and holding these together along the cut plane eventually results in development of meristem tissue on the cut surfaces and the union of tissues between the two fruit (Schroeder ef a/., 1959). -
Phloem Structure and Development in Illicium Parviflorum, a Basal Angiosperm Shrub Authors
bioRxiv preprint doi: https://doi.org/10.1101/326322; this version posted June 1, 2018. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. 1 Article title: 2 Phloem structure and development in Illicium parviflorum, a basal angiosperm shrub 3 Authors: 4 Juan M. Losada1,2* and N. Michele Holbrook1,2 5 Affiliations: 6 1Department of Organismic and Evolutionary Biology, Harvard University. 16 Divinity Av., 7 Cambridge, MA, 02138, USA. 8 2Arnold Arboretum of Harvard University. 1300 Centre St., Boston, MA, 02130, USA. 9 *Author for correspondence. 10 Phone: + 1 (617) 384 5631 11 E-mail: [email protected] 12 13 WORD AND FIGURE COUNTS: 14 Total word count: 5,882 15 Introduction: 835 16 Materials and Methods: 1,530 17 Results: 1,412 18 Discussion: 1,939 19 Number of color figures: 8 20 Supporting information figures: 2 21 22 23 1 bioRxiv preprint doi: https://doi.org/10.1101/326322; this version posted June 1, 2018. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. 24 SUMMARY 25 Recent studies in canopy-dominant trees revealed a structure-function scaling of the 26 phloem. However, whether axial scaling is conserved in woody plants of the understory, the 27 environments of most basal-grade angiosperms, remains mysterious. We used seedlings 28 and adult plants of the shrub Illicium parviflorum to explore the anatomy and physiology of 29 the phloem in their aerial parts, and possible changes through ontogeny. -
Sclereid Distribution in the Leaves of Pseudotsuga Under Natural and Experimental Conditions Author(S): Khalil H
Sclereid Distribution in the Leaves of Pseudotsuga Under Natural and Experimental Conditions Author(s): Khalil H. Al-Talib and John G. Torrey Source: American Journal of Botany, Vol. 48, No. 1 (Jan., 1961), pp. 71-79 Published by: Botanical Society of America Stable URL: http://www.jstor.org/stable/2439597 . Accessed: 19/08/2011 13:16 Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at . http://www.jstor.org/page/info/about/policies/terms.jsp JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact [email protected]. Botanical Society of America is collaborating with JSTOR to digitize, preserve and extend access to American Journal of Botany. http://www.jstor.org January, 1961] AL-TALIB AND TORREY-SCLEREID DISTRIBUTION 71 SMITH, G. H. 1926. Vascular anatomyof Ranalian flowers. Aquilegia formosav. truncata and Ranunculus repens. I. Ranunculaceae. Bot. Gaz. 82: 1-29. Univ. California Publ. Bot. 25: 513-648. 1928. Vascular anatomy of Ranalian flowers. II. TUCKER, SHIRLEY C. 1959. Ontogeny of the inflorescence Ranunculaceae (continued), Menispermaceae,Calycan- and the flowerin Drimys winteri v. chilensis. Univ. thaceae, Annonaceae. Bot. Gaz. 85: 152-177. California Publ. Bot. 30: 257-335. SNOW, MARY, AND R. SNOW. 1947. On the determination . 1960. Ontogeny of the floral apex of Micheiat of leaves. New Phytol. 46: 5-19.