“10 Years: Plant Stem Cells”

Total Page:16

File Type:pdf, Size:1020Kb

“10 Years: Plant Stem Cells” E51280 4 / 2019 COSMETICS | SPRAY TECHNOLOGY | MARKETING WWW.COSSMA.COM GO FUTURE: BODY CARE A bunch of exciting innovations at In-Cosmetics 2019 SPOTLIGHT: BOXES New approaches for stunning carton design Dr Fred Zülli, Mibelle Biochemistry “10 YEARS: PLANT STEM CELLS” FLORENCE TROMBINI BASF Rambutan: A superfruit for hair and skin PERSONALITIES & PROFILES N N Interview with: Dr Fred Zülli, Managing Director, Mibelle Biochemistry Buchs, Switzerland www.mibellebiochemistry.com 10 years of plant stem cells Interview | On the occasion of the 10 th anniversary of plant stem cells, Dr Fred Zülli from Mibelle Biochemistry looks atthe advantages and sustainability of plant stem cells and the potential of biotechnology for cosmetics. Biochemistry Mibelle photos: 56 l COSSMA 4 I 2019 PERSONALITIES & PROFILES COSSMA: What gave rise to the How do plant stem cells work in creation of plant stem cells for cosmetics? RESEARCH cosmetics? R&D into nano- The skin undergoes a constant cell technology , Dr Fred Zülli, Managing Director, turnover in order to maintain, re- neuroscience or Mibelle Biochemistry: At In-Cos- new and repair its tissue. Adult stem cells helps metics 2008 in Amsterdam, we stem cells that reside in special to bring innovation launched the product PhytoCell- niches in different layers of the to the cosmetics Tec Malus Domestica as a new ac- skin are responsible for this re- industry tive onto the market, and in do- generative capacity. Stem cells are ing so we pioneered the trend of defined by their ability to self-re- stem cell cosmetics. More than ten new and differentiate into mature years after the Amsterdam launch, specialised cell types. However, this trend continues to grow. Re- stem cells are also subject to age- Plant stem cells search into life science topics such ing which leads to reduced vital- can be obtained fig. 1: Callus tissue on agar plate as nanotechnology, neuroscience ity and a decrease in the stem cell with the help of or stem cells is a very promising pool. The depletion of stem cell plant cell culture and successful approach for bring- activity is a major cause of skin technology ing innovation to the cosmetic in- ageing. Therefore, cosmetic ingre- dustry. dients that vitalise skin stem cells irradiation. The most convincing provide a real anti-ageing poten- study showed that the application How are plant stem cells creat- tial, see fig. 2. of plant stem cell extract led to the ed? The large-scale formation of a 3-dimensional skin Do you have data which prove production of tissue out of aged skin stem cells. Plant stem cells can be obtained the effect of plant stem cells on plant stem cells is a with the help of plant cell cul- skin stem cells? major challenge But how can plant stem cells ture technology. This involves a work on human stem cells and plant material, such as a leaf or a Extracts of different plant stem how does this benefit cosmetic fruit, which is then wounded and cells were tested on human ke- formulations? incubated on special agar plates, ratinocyte progenitor cells (epi- see fig. 1. The plant develops a dermal stem cells). Skin stem cell Research into The activity of plant stem cells on wound-healing tissue called cal- cultures treated with plant stem exosomes is rele- human stem cells is based on the lus. This tissue is based on de-dif- cell extracts showed an increased vant for under- fact that stem cells require spe- ferentiated cells, which are pluri- vitality in a colony forming effi- standing cial nutrients in order to be able potent stem cells. cacy (CFE) assay. Further studies cell-to-cell to grow. An extract of plant stem communication showed that plant stem cells can cells contains precisely the rele- Please explain to us how these protect skin stem cells against UV vant nutrients to vitalise human plant stem cells can be pro- duced for cosmetic applica- tions? The large-scale production of plant stem cells is a major chal- lenge. From the plate, the cells have to be transferred into liq- uid media containing sugar. This means that the entire process of growing the cells has to be con- ducted under strict sterile condi- tions which is difficult to realise as the plant stem cells grow very slowly in comparison to bacteria. However, we solved this problem by constructing our own dispos- able bag reactor called 5-wave bio-reactors. These reactors allow us to simultaneously cultivate five times 25 litres of cell cultures. fig. 2: Skin renewal by epidermal stem cells www.cossma.com l 57 PERSONALITIES & PROFILES More information at “Our aim is to find new actives that will www.cossma.com , web code 100197 Your access codes for April : protect the skin against epigenetic effects” User name: cossma4 Password: body Dr Fred Zülli, Managing Director, Mibelle Biochemistry stem cells. An extract of plant strated that our product activates Tec technology of Mibelle Biochem- stem cells has a different compo- mesenchymal stem cells to release istry was recognised at the United sition from a normal plant extract. CULTIVATION more exosomes which then acti- Nations Conference on Sustaina- In clinical studies we managed to Cultivating stem vate the collagen production of ble Development in Rio de Janeiro prove that different plant stem cell cells requires no fibroblasts. Finding out how ex- 2012 as a breakthrough technol- extracts can improve the density further biomaterial osomes work is a very new field ogy for the development of new of the skin, reduce wrinkles and from the wild of science and relevant for under- natural cosmetic ingredients. increase the skin renewal. standing cell-to-cell communica- tion. Have you developed other ingre- What were the latest findings in dients by biotechnology? the field of plant stem cell tech- Plant stem cells are produced nology? with the help of biotechnology. Yes, we have. Over the last few What role does biotechnology years, we have developed two In the past ten years, our com- play in Mibelle Biochemistry’s new ingredients that are based pany has launched seven different research? on unique technologies. One in- plant stem cell products that have Once mesen- gredient is based on the cultiva- come from different plants such chymal stem Biotechnology is part of our strat- tion of a red snow algae in pho- as apple, grape, alpine rose, com- cells have been egy to create innovative actives in to-bioreactors in a cold room. In frey, argan, saponaria and goji. activated, released a sustainable way. Our first stem contrast to this, the other ingredi- With the help of new cell culture exosomes acti- cell product was based on an old ent is based on the cultivation of techniques, we proved that dif- vate the collagen apple cultivar c alled Uttwiler Spät- a moss protonema tissue culture ferent stem cells activated differ- production of lauber. In fact, today, there is only in sterile bags, see fig. 3. fibroblasts ent biochemical mechanisms of a small number of trees of this rare skin stem cells and hair stem cells. apple cultivar still alive. However, After stem cell cosmetics, what In our latest research we demon- only very few of these apples were do you think will be the next fu- required in order to establish the ture key topics in the world of plant cell culture of this origin. cosmetics? We have now been cultivating the stem cells for over 10 years with- We are convinced that the new out using further biomaterial from findings in epigenetics will be in- the wild. tegrated into novel developments of actives. Is this thus a contribution to the The influence of the environment, big trend of sustainability? for example air pollution and psy- chological stress, can cause epi- Yes, it is. The concept of using rare genetic modifications in the skin. and exotic plants in cosmetics ap- These negative effects will be peals to consumers and research- long-lasting and could even be ers alike. Unfortunately, the sus- passed on to the next generation. tainable use of these plants is very This is why, in our research we often not possible since the plants are focusing on finding innovative cannot be cultivated. The produc- active ingredients that will help to tion of plant stem cells from en- protect the skin against epigenetic dangered plant species overcomes effects such as DNA methylation, this problem because only small histone modifications or miRNA amounts of the plant are needed expression. Q to start the stem cell culture in bi- Additional information can be found fig. 3: Snow algae and moss tissue cultivation in bioreactors oreactors. Therefore, the PhytoCell- on the Internet – see Internet panel 58 l COSSMA 4 I 2019 COSSMA HAS THE ANSWER. STAY UP-TO-DATE. WWW.COSSMA.COM/BLUE GLOBAL TRENDS IN PACKAGING, INGREDIENTS AND DISTRIBUTION..
Recommended publications
  • Callus Induction, Direct and Indirect Organogenesis of Ginger (Zingiber Officinale Rosc)
    Vol. 15(38), pp. 2106-2114, 21 September, 2016 DOI: 10.5897/AJB2016.15540 Article Number: B7FF38560550 ISSN 1684-5315 African Journal of Biotechnology Copyright © 2016 Author(s) retain the copyright of this article http://www.academicjournals.org/AJB Full Length Research Paper Callus induction, direct and indirect organogenesis of ginger (Zingiber officinale Rosc) Ammar Mohammed Ahmed Ali1*, Mawahib ElAmin Mohamed El-Nour2 and Sakina Mohamed Yagi3 1Department of Biology, Faculty of Education, Hajjah University, Yemen. 2Department of Biology and Biotechnology, Faculty of Science and Technology, AL Neelain University, Sudan. 3Botany Department, Faculty of Science, University of Khartoum, Sudan. Received 25 June, 2016; Accepted 7 September, 2016 The present study aimed to induce callus, direct and indirect organogenesis of ginger (Zingiber officinale Rosc) by using Murashige and Skoog (MS) medium fortified with different concentrations and combinations of growth regulators. Shoot tip, in vitro leaf and root segments were used as explants to induce callus by MS medium containing (0.00 as control, 0.5, 1.00, 2.00 and 3.00 mg/L) of 2,4-dichloro- phenoxyacetic acid (2,4-D). Callus induced was subcultured on MS+2,4-D at different concentrations (0.5, 1.00, 2.00 and 3.00 mg/L) and one concentration 0.5 mg/L of 6-benzyl amino purine (BAP) was used. The sprouting buds (about 1 to 1.5 cm) were used as explants for direct shoots and roots induction by MS medium + 2.00, 3.00 and 4.5 mg/L of BAP. Callus induced by 1.00 mg/L 2,4-D was regenerated on MS + 0.5 mg/L 2,4-D to obtain a green callus, this callus was transferred to MS medium with combinations of 0.5 mg/L 1-naphthaleneacetic acid (NAA) with different concentrations of BAP (1.00, 2.00,3.00 and 4.00 mg/L) for indirect organogenesis.
    [Show full text]
  • Plant Terminology
    PLANT TERMINOLOGY Plant terminology for the identification of plants is a necessary evil in order to be more exact, to cut down on lengthy descriptions, and of course to use the more professional texts. I have tried to keep the terminology in the database fairly simple but there is no choice in using many descriptive terms. The following slides deal with the most commonly used terms (more specialized terms are given in family descriptions where needed). Professional texts vary from fairly friendly to down-right difficult in their use of terminology. Do not be dismayed if a plant or plant part does not seem to fit any given term, or that some terms seem to be vague or have more than one definition – that’s life. In addition this subject has deep historical roots and plant terminology has evolved with the science although some authors have not. There are many texts that define and illustrate plant terminology – I use Plant Identification Terminology, An illustrated Glossary by Harris and Harris (see CREDITS) and others. Most plant books have at least some terms defined. To really begin to appreciate the diversity of plants, a good text on plant systematics or Classification is a necessity. PLANT TERMS - Typical Plant - Introduction [V. Max Brown] Plant Shoot System of Plant – stem, leaves and flowers. This is the photosynthetic part of the plant using CO2 (from the air) and light to produce food which is used by the plant and stored in the Root System. The shoot system is also the reproductive part of the plant forming flowers (highly modified leaves); however some plants also have forms of asexual reproduction The stem is composed of Nodes (points of origin for leaves and branches) and Internodes Root System of Plant – supports the plant, stores food and uptakes water and minerals used in the shoot System PLANT TERMS - Typical Perfect Flower [V.
    [Show full text]
  • Transcript Profiling of a Novel Plant Meristem, the Monocot Cambium
    Journal of Integrative JIPB Plant Biology Transcript profiling of a novel plant meristem, the monocot cambiumFA Matthew Zinkgraf1,2, Suzanne Gerttula1 and Andrew Groover1,3* 1. US Forest Service, Pacific Southwest Research Station, Davis, California, USA 2. Department of Computer Science, University of California, Davis, USA 3. Department of Plant Biology, University of California, Davis, USA Article *Correspondence: Andrew Groover ([email protected]) doi: 10.1111/jipb.12538 Abstract While monocots lack the ability to produce a xylem tissues of two forest tree species, Populus Research vascular cambium or woody growth, some monocot trichocarpa and Eucalyptus grandis. Monocot cambium lineages evolved a novel lateral meristem, the monocot transcript levels showed that there are extensive overlaps cambium, which supports secondary radial growth of between the regulation of monocot cambia and vascular stems. In contrast to the vascular cambium found in woody cambia. Candidate regulatory genes that vary between the angiosperm and gymnosperm species, the monocot monocot and vascular cambia were also identified, and cambium produces secondary vascular bundles, which included members of the KANADI and CLE families involved have an amphivasal organization of tracheids encircling a in polarity and cell-cell signaling, respectively. We suggest central strand of phloem. Currently there is no information that the monocot cambium may have evolved in part concerning the molecular genetic basis of the develop- through reactivation of genetic mechanisms involved in ment or evolution of the monocot cambium. Here we vascular cambium regulation. report high-quality transcriptomes for monocot cambium Edited by: Chun-Ming Liu, Institute of Crop Science, CAAS, China and early derivative tissues in two monocot genera, Yucca Received Feb.
    [Show full text]
  • Bone Marrow (Stem Cell) Transplant for Sickle Cell Disease Bone Marrow (Stem Cell) Transplant
    Bone Marrow (Stem Cell) Transplant for Sickle Cell Disease Bone Marrow (Stem Cell) Transplant for Sickle Cell Disease 1 Produced by St. Jude Children’s Research Hospital Departments of Hematology, Patient Education, and Biomedical Communications. Funds were provided by St. Jude Children’s Research Hospital, ALSAC, and a grant from the Plough Foundation. This document is not intended to take the place of the care and attention of your personal physician. Our goal is to promote active participation in your care and treatment by providing information and education. Questions about individual health concerns or specifi c treatment options should be discussed with your physician. For more general information on sickle cell disease, please visit our Web site at www.stjude.org/sicklecell. Copyright © 2009 St. Jude Children’s Research Hospital How did bone marrow (stem cell) transplants begin for children with sickle cell disease? Bone marrow (stem cell) transplants have been used for the treatment and cure of a variety of cancers, immune system diseases, and blood diseases for many years. Doctors in the United States and other countries have developed studies to treat children who have severe sickle cell disease with bone marrow (stem cell) transplants. How does a bone marrow (stem cell) transplant work? 2 In a person with sickle cell disease, the bone marrow produces red blood cells that contain hemoglobin S. This leads to the complications of sickle cell disease. • To prepare for a bone marrow (stem cell) transplant, strong medicines, called chemotherapy, are used to weaken or destroy the patient’s own bone marrow, stem cells, and infection fi ghting system.
    [Show full text]
  • Tansley Review Evolution of Development of Vascular Cambia and Secondary Growth
    New Phytologist Review Tansley review Evolution of development of vascular cambia and secondary growth Author for correspondence: Rachel Spicer1 and Andrew Groover2 Andrew Groover 1The Rowland Institute at Harvard, Cambridge, MA, USA; 2Institute of Forest Genetics, Pacific Tel: +1 530 759 1738 Email: [email protected] Southwest Research Station, USDA Forest Service, Davis, CA, USA Received: 29 December 2009 Accepted: 14 February 2010 Contents Summary 577 V. Evolution of development approaches for the study 587 of secondary vascular growth I. Introduction 577 VI. Conclusions 589 II. Generalized function of vascular cambia and their 578 developmental and evolutionary origins Acknowledgements 589 III. Variation in secondary vascular growth in angiosperms 581 References 589 IV. Genes and mechanisms regulating secondary vascular 584 growth and their evolutionary origins Summary New Phytologist (2010) 186: 577–592 Secondary growth from vascular cambia results in radial, woody growth of stems. doi: 10.1111/j.1469-8137.2010.03236.x The innovation of secondary vascular development during plant evolution allowed the production of novel plant forms ranging from massive forest trees to flexible, Key words: forest trees, genomics, Populus, woody lianas. We present examples of the extensive phylogenetic variation in sec- wood anatomy, wood formation. ondary vascular growth and discuss current knowledge of genes that regulate the development of vascular cambia and woody tissues. From these foundations, we propose strategies for genomics-based research in the evolution of development, which is a next logical step in the study of secondary growth. I. Introduction this pattern characterizes most extant forest trees, significant variation exists among taxa, ranging from extinct woody Secondary vascular growth provides a means of radially lycopods and horsetails with unifacial cambia (Cichan & thickening and strengthening plant axes initiated during Taylor, 1990; Willis & McElwain, 2002), to angiosperms primary, or apical growth.
    [Show full text]
  • Non-Destructive Estimation of Root Pressure Using Sap Flow, Stem
    Annals of Botany 111: 271–282, 2013 doi:10.1093/aob/mcs249, available online at www.aob.oxfordjournals.org Non-destructive estimation of root pressure using sap flow, stem diameter measurements and mechanistic modelling Tom De Swaef*, Jochen Hanssens, Annelies Cornelis and Kathy Steppe Faculty of Bioscience Engineering, Department of Applied Ecology and Environmental Biology, Laboratory of Plant Ecology, Ghent University, Coupure links 653, B-9000 Ghent, Belgium * For correspondence. E-mail [email protected] Received: 20 August 2012 Returned for revision: 24 September 2012 Accepted: 8 October 2012 Published electronically: 4 December 2012 † Background Upward water movement in plants via the xylem is generally attributed to the cohesion–tension theory, as a response to transpiration. Under certain environmental conditions, root pressure can also contribute Downloaded from to upward xylem water flow. Although the occurrence of root pressure is widely recognized, ambiguity exists about the exact mechanism behind root pressure, the main influencing factors and the consequences of root pres- sure. In horticultural crops, such as tomato (Solanum lycopersicum), root pressure is thought to cause cells to burst, and to have an important impact on the marketable yield. Despite the challenges of root pressure research, progress in this area is limited, probably because of difficulties with direct measurement of root pressure, prompt- ing the need for indirect and non-destructive measurement techniques. http://aob.oxfordjournals.org/ † Methods A new approach to allow non-destructive and non-invasive estimation of root pressure is presented, using continuous measurements of sap flow and stem diameter variation in tomato combined with a mechanistic flow and storage model, based on cohesion–tension principles.
    [Show full text]
  • Auxins Cytokinins and Gibberellins TD-I Date: 3/4/2019 Cell Enlargement in Young Leaves, Tissue Differentiation, Flowering, Fruiting, and Delay of Aging in Leaves
    Informational TD-I Revision 2.0 Creation Date: 7/3/2014 Revision Date: 3/4/2019 Auxins, Cytokinins and Gibberellins Isolation of the first Cytokinin Growing cells in a tissue culture medium composed in part of coconut milk led to the realization that some substance in coconut milk promotes cell division. The “milk’ of the coconut is actually a liquid endosperm containing large numbers of nuclei. It was from kernels of corn, however, that the substance was first isolated in 1964, twenty years after its presence in coconut milk was known. The substance obtained from corn is called zeatin, and it is one of many cytokinins. What is a Growth Regulator? Plant Cell Growth regulators (e.g. Auxins, Cytokinins and Gibberellins) - Plant hormones play an important role in growth and differentiation of cultured cells and tissues. There are many classes of plant growth regulators used in culture media involves namely: Auxins, Cytokinins, Gibberellins, Abscisic acid, Ethylene, 6 BAP (6 Benzyladenine), IAA (Indole Acetic Acid), IBA (Indole-3-Butyric Acid), Zeatin and trans Zeatin Riboside. The Auxins facilitate cell division and root differentiation. Auxins induce cell division, cell elongation, and formation of callus in cultures. For example, 2,4-dichlorophenoxy acetic acid is one of the most commonly added auxins in plant cell cultures. The Cytokinins induce cell division and differentiation. Cytokinins promote RNA synthesis and stimulate protein and enzyme activities in tissues. Kinetin and benzyl-aminopurine are the most frequently used cytokinins in plant cell cultures. The Gibberellins is mainly used to induce plantlet formation from adventive embryos formed in culture.
    [Show full text]
  • Mechanical Properties of Blueberry Stems
    Vol. 64, 2018 (4): 202–208 Res. Agr. Eng. https://doi.org/10.17221/90/2017-RAE Mechanical properties of blueberry stems Margus Arak1, Kaarel Soots1*, Marge Starast2, Jüri Olt1 1Institute of Technology, Estonian University of Life Sciences, Tartu, Estonia 2Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia *Corresponding author: [email protected] Abstract Arak M., Soots K., Starast M., Olt J. (2018): Mechanical properties of blueberry stems. Res. Agr. Eng., 64: 202–208. In order to model and optimise the structural parameters of the working parts of agricultural machines, including har- vesting machines, the mechanical properties of the culture harvested must be known. The purpose of this article is to determine the mechanical properties of the blueberry plant’s stem; more precisely the tensile strength and consequent elastic modulus E. In order to achieve this goal, the measuring instrument Instron 5969L2610 was used and accompany- ing software BlueHill 3 was used for analysing the test results. The tested blueberry plant’s stems were collected from the blueberry plantation of the Farm Marjasoo. The diameters of the stems were measured, test units were prepared, tensile tests were performed, tensile strength was determined and the elastic modulus was obtained. Average value of the elastic modulus of the blueberry (Northblue) plant’s stem remained in the range of 1268.27–1297.73 MPa. Keywords: agricultural engineering; blueberry; harvesting; mechanical properties; elastic modulus Lowbush blueberry (Vaccinium angustifolium abandoned peat fields because of soils with high Ait.) is a native naturally occurring plant in North organic matter content and low pH (Yakovlev et America.
    [Show full text]
  • Genetic Manipulation of Stem Cells Eleni Papanikolaou1,2*, Kalliopi I
    logy & Ob o st ec e tr n i y c s G Papanikolaou et al. Gynecol Obstetric 2011, S:6 Gynecology & Obstetrics DOI: 10.4172/2161-0932.S6-001 ISSN: 2161-0932 Review Article Open Access Genetic Manipulation of Stem Cells Eleni Papanikolaou1,2*, Kalliopi I. Pappa1,3 and Nicholas P. Anagnou1,2 1Laboratory of Cell and Gene Therapy, Centre for Basic Research, Biomedical Research Foundation of the Academy of Athens (BRFAA), Athens, Greece 2Laboratory of Biology, University of Athens School of Medicine, Athens, Greece 3First Department of Obstetrics and Gynecology, University of Athens School of Medicine, Alexandra Hospital, Athens, Greece Abstract Stem cells have the remarkable potential for self-renewal and differentiation into many cell types in the body during early life and development. In addition, in many tissues they constitute a source of internal repair system, dividing essentially without limit to replenish damaged or dead cells. After division, each new cell has the potential either to retain the stem cell status or to differentiate to a more specialized cell type, such as a red blood cell, a brain cell or a heart cell. Until recently, three types of stem cells from animals and humans have been characterized, i.e. embryonic stem cells, fetal stem cells and somatic adult stem cells. However, in late 2007, researchers accomplished another breakthrough by identifying conditions that allow some specialized adult cells to be “reprogrammed” genetically to assume a stem cell-like state. These cells, called induced pluripotent stem cells (iPSCs), express genes and factors important for maintaining the unique properties and features of embryonic stem cells.
    [Show full text]
  • Genetics and Stem Cell Research A.Genetics
    7: Genetics and Stem Cell Research A.Genetics 1. Introduction The principal special feature of genetics research is that the result of the study applies not only to the proband but also influences her lineage both in the past and in the future. For example genetic studies demonstrated Thomas Jefferson’s sexual relationship with his slave Sally Hemings and defined their descendants to this day. As we all know from television, genetic studies can be done from any tissue fragment that contains DNA so that studies of surgical specimens, biopsy materials, hair, epithelium and blood samples can all be utilized for extensive genetic studies. 2. Sampling Some DNA is more medically valuable than other. Samples from isolated populations in which a particular disorder is prevalent have a much greater probability of yielding the causal gene(s) because they have fewer genome variations than in the general population. Once isolated, the genetic material associated with the disorder has a good chance of yielding novel diagnostic and/or therapeutic approaches for the disorder. 3. Property rights A persistent question is whether the providers of the genetic material have any rights to the products created from their genetic material. These days, most consent forms are written explicitly to exclude intellectual property rights from the subjects. As might be imagined, this smacks of exploitation in the developing world. Negotiation of a monetary return to the community has sometimes been concluded. Important and lucrative products have been derived from individuals’ genomes without their receiving royalties or other compensation. However, the knowledge, technical expertise, and capital needed to make a useful product from a blood or tissue sample come from the company not the donor.
    [Show full text]
  • The Establishment of Cell Suspension Cultures of <Emphasis Type="Italic">
    In Vitro Cell. Dev. Biol. 26:425-430,April 1990 1990Tissue Culture Association 0883-8364/90 $01.50+0.00 THE ESTABLISHMENT OF CELL SUSPENSION CULTURES OF GLADIOLUS THAT REGENERATE PLANTS KATHRYN KAMO, JANET CHEN, ANDROGER LAWSON United States Department of Agriculture, Florist and Nursery Crops Laboratory, Beltsville Agricultural Research Center, Beltsville, .Maryland 20705 (Received 27 September 1989; accepted 27 January. 1990~ SUMMARY Inflorescence stalks from greenhouse-grown Gladiolus plants of the cuhivars 'Blue Isle' and 'Hunting Song' cultured on a nurashige and Skoog basal salts medium supplemented with 53.6 /~M l-napthaleneacetic acid formed a compact, not friable type of callus that regenerated plantlets. Cormel slices and intact plantlets of three cultivars {'Peter Pears,' 'Rosa Supreme,' 'Jenny Lee') propagated through tissue culture formed a friable type of callus when cultured on Murashige and Skoog basal salts medium supplemented with 2,4-dichlorophenoxyacetic acid. This friable callus readily formed a cell suspension when the callus was placed in a liquid medium. Plants were regenerated from two-month-old suspension cell cultures of the commercial cultivar 'Peter Pears' after the suspension cells had been cultured on solid medium. Key words: flower bulb crops; monocot cell suspensions. INTRODUCTION Regeneration of Gladiolus has been reported from The ability to regenerate plants from cell suspensions floral explants ~33). The explants formed either a thin and protoplasts is important for future experiments in layer of callus or no callus prior to plant regeneration. In genetic engineering. Monocots have been relatively addition, Wilfret ~31) reported that shoot tips grown in difficult to manipulate in culture, although there has liquid medium developed callus more readily than on been much progress recently, particularly with crops of solid medium, but plant regeneration from the callus was agronomic significance.
    [Show full text]
  • The Amazing Stem Cell What Are They? Where Do They Come From? How Are They Changing Medicine? Stem Cells Are “Master Cells”
    The Amazing Stem Cell What are they? Where do they come from? How are they changing medicine? Stem cells are “master cells” Stem cells can be “guided” to become many other cell types. Stem Cell Bone cell Self-renewed stem cell Brain cell Heart muscle Blood cell cell There are several types of stem cells, each from a unique source Embryonic stem cells* • Removed from embryos created for in vitro fertilization after donation consent is given. (Not sourced from aborted fetuses.) • Embryos are 3-5 days old (blastocyst) and have about 150 cells. • Can become any type of cell in the body, also called pluripotent cells. • Can regenerate or repair diseased tissue and organs. • Current use limited to eye-related disorders. * Not used by Mayo Clinic. Adult stem cells • Found in most adult organs and tissues, including bone marrow. • Often taken from bone marrow in the hip. • Blood stem cells can be collected through apheresis (separated from blood). • Can regenerate and repair diseased or damaged tissues (regenerative medicine). • Can be used as specialized “drugs” to potentially treat degenerative conditions. • Currently tested in people with neurological and heart disease. Umbilical cord blood stem cells • Found in blood in placenta and umbilical cord after childbirth. • Have the ability to change into specialized cells (like blood cells), also called progenitor cells. • Parents choose to donate umbilical cord blood for use in research, or have it stored for private or public banks. • Can be used in place of bone marrow stem cell transplants in some clinical applications. Bioengineered stem cells • Regular adult cells (e.g., blood, skin) reprogrammed to act like embryonic stem cells (induced pluripotent stem cells).
    [Show full text]