CGC 22 (1999) Cucurbit Genetics Cooperative
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Arabidopsis LEAFY COTYLEDON2 Induces Maturation Traits and Auxin Activity: Implications for Somatic Embryogenesis
Arabidopsis LEAFY COTYLEDON2 induces maturation traits and auxin activity: Implications for somatic embryogenesis Sandra L. Stone*, Siobhan A. Braybrook*†, Stephanie L. Paula*‡, Linda W. Kwong*, Jonathan Meuser*§, Julie Pelletier*, Tzung-Fu Hsieh¶, Robert L. Fischer¶, Robert B. Goldbergʈ**, and John J. Harada*†** *Section of Plant Biology, College of Biological Sciences, and †Graduate Program in Plant Biology, University of California, Davis, CA 95616; ¶Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720; and ʈDepartment of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, CA 90024 Contributed by Robert B. Goldberg, December 30, 2007 (sent for review December 16, 2007) LEAFY COTYLEDON2 (LEC2) is a central regulator of embryogenesis INSENSITIVE3 (ABI3) and another LEC protein, FUSCA3 sufficient to induce somatic cells to form embryos when expressed (FUS3), also play critical roles in embryogenesis (11, 12). ectopically. Here, we analyze the cellular processes induced by To gain insight into the mechanisms by which cells change LEC2, a B3 domain transcription factor, that may underlie its ability their fate and become embryogenic, we analyzed postembryonic to promote somatic embryogenesis. We show auxin-responsive 35S:LEC2 plants. We showed previously LEC2 is expressed genes are induced after LEC2 activation in seedlings. Genes en- primarily during seed development and ectopic postembryonic coding enzymes involved in auxin biosynthesis, YUC2 and YUC4, expression of LEC2 induces vegetative cells to undergo somatic are activated within 1 h after induction of LEC2 activity, and YUC4 embryogenesis (8). We hypothesized LEC2 establishes a cellular appears to be a direct transcriptional target of LEC2. We also show environment that promotes embryo development. -
Upregulation of a KN1 Homolog by Transposon Insertion Promotes Leafy Head Development in Lettuce
Upregulation of a KN1 homolog by transposon insertion promotes leafy head development in lettuce Changchun Yua,1, Chenghuan Yana,1, Yuling Liua, Yali Liua, Yue Jiaa, Dean Lavelleb, Guanghui Ana, Weiyi Zhanga, Lei Zhanga, Rongkui Hanb, Robert M. Larkina, Jiongjiong Chena, Richard W. Michelmoreb, and Hanhui Kuanga,2 aKey Laboratory of Horticultural Plant Biology, Ministry of Education, Key Laboratory of Horticultural Crop Biology and Genetic improvement (Central Region), Ministry of Agriculture (MOA), College of Horticulture and Forestry Sciences, Huazhong Agricultural University, 430070 Wuhan, People’s Republic of China; and bGenome Center and Department of Plant Sciences, University of California, Davis, CA 95616 Edited by Martin F. Yanofsky, University of California San Diego, La Jolla, CA, and approved November 4, 2020 (received for review September 19, 2020) Leafy head is a unique type of plant architecture found in some axes. Heading in vegetable crops is considered to be a develop- vegetable crops, with leaves bending inward to form a compact head. mental disorder of leaf dorsoventrality (i.e., incongruous cell di- The genetic and molecular mechanisms underlying leafy head in vision/expansion along the adaxial–abaxial axis). Genes involved in vegetables remain poorly understood. We genetically fine-mapped leaf dorsoventrality include AS1, AS2, miR390, TAS3, KAN, and cloned a major quantitative trait locus controlling heading in YABBY, ARF3, ARF4, PHB,andREV (6–12). Genes associated lettuce. The candidate gene (LsKN1)isahomologofknotted 1 with dorsoventrality are directly or indirectly regulated by key (KN1)fromZea mays. Complementation and CRISPR/Cas9 knockout developmental regulators of leaves, such as members of the experiments confirmed the role of LsKN1 in heading. -
Studies on Genetic Diversity of Japanese and Vietnamese Melon Germplasm by Using Molecular Markers
Studies on genetic diversity of Japanese and Vietnamese melon germplasm by using molecular markers 2019, September Tran Phuong Dung Graduate School of Environmental and Life Science (Doctor’s course) OKAYAMA UNIVERSITY 1 Table of contents Chapter 1. General introduction .................................................................................................................. 3 1.1. Phylogenetic relationships in genus Cucumis .............................................................................. 4 1.2. Intraspecific classification and domestication history of melon ..................................................... 9 1.3. Asia – the origin center of modern melon cultivars ....................................................................... 16 Chapter 2. Genetic diversity of Japanese melon breeding lines ............................................................... 18 2.1. Introduction ..................................................................................................................................... 18 2.2. Materials and Methods ................................................................................................................... 19 2.3. Result ............................................................................................................................................... 23 2.4. Discussion ........................................................................................................................................ 28 Chapter 3. Development of RAPD‐derived STS -
Abacca Mosaic Virus
Annex Decree of Ministry of Agriculture Number : 51/Permentan/KR.010/9/2015 date : 23 September 2015 Plant Quarantine Pest List A. Plant Quarantine Pest List (KATEGORY A1) I. SERANGGA (INSECTS) NAMA ILMIAH/ SINONIM/ KLASIFIKASI/ NAMA MEDIA DAERAH SEBAR/ UMUM/ GOLONGA INANG/ No PEMBAWA/ GEOGRAPHICAL SCIENTIFIC NAME/ N/ GROUP HOST PATHWAY DISTRIBUTION SYNONIM/ TAXON/ COMMON NAME 1. Acraea acerata Hew.; II Convolvulus arvensis, Ipomoea leaf, stem Africa: Angola, Benin, Lepidoptera: Nymphalidae; aquatica, Ipomoea triloba, Botswana, Burundi, sweet potato butterfly Merremiae bracteata, Cameroon, Congo, DR Congo, Merremia pacifica,Merremia Ethiopia, Ghana, Guinea, peltata, Merremia umbellata, Kenya, Ivory Coast, Liberia, Ipomoea batatas (ubi jalar, Mozambique, Namibia, Nigeria, sweet potato) Rwanda, Sierra Leone, Sudan, Tanzania, Togo. Uganda, Zambia 2. Ac rocinus longimanus II Artocarpus, Artocarpus stem, America: Barbados, Honduras, Linnaeus; Coleoptera: integra, Moraceae, branches, Guyana, Trinidad,Costa Rica, Cerambycidae; Herlequin Broussonetia kazinoki, Ficus litter Mexico, Brazil beetle, jack-tree borer elastica 3. Aetherastis circulata II Hevea brasiliensis (karet, stem, leaf, Asia: India Meyrick; Lepidoptera: rubber tree) seedling Yponomeutidae; bark feeding caterpillar 1 4. Agrilus mali Matsumura; II Malus domestica (apel, apple) buds, stem, Asia: China, Korea DPR (North Coleoptera: Buprestidae; seedling, Korea), Republic of Korea apple borer, apple rhizome (South Korea) buprestid Europe: Russia 5. Agrilus planipennis II Fraxinus americana, -
CGC 21 (1998) Cucurbit Genetics Cooperative
CGC 21 (1998) Cucurbit Genetics Cooperative Report No. 21 July 1998 Table of Contents (article titles linked to html files) Introduction Comments from the CGC Coordinating Committee Comments from the CGC Gene List Committee Comments from the CGC Gene Curators Cucurbitaceae '98: Evaluation and Enhancement of Cucurbit Germplasm 1997 Annual CGC Business Meeting 1998 Annual CGC Business Meeting Cucurbit Crops Germplasm Committee Update 18th Annual Meeting of the Watermelon Research and Development Group Upcoming Meetings of Interest to Cucurbit Researchers Cucumber (Cucumis sativus) 1. Relationships among Putative Botanical Varieties in Cucumber Jinsheng Liu (P.R. China) and Jack E. Staub (USA) CGC 21:1-5 (1998) 2. Paternal Inheritance of Mitochondrial DNA in Cucumber: Confirmation by PCR Method S. Matsuura, H. Mizusawa and K. Kadowaki (Japan) CGC 21:6-7 (1998) 3. Effects of Copper Seedcoat Agent on Cucumber Germination and Seedling Growth Meng Huanwen, Cui Hongwen, Cheng Zhihui and He Danrao (P.R. China) CGC 21:8-10 (1998) 4. The Relationship Between Low-temperature Germination and Chilling Tolerance in Cucumber Jianguo Li, Hongwen Cui and Meng Zhang (P.R. China) CGC 21:11-13 (1998) 5. Ethylene Production and the Evaluation of Tolerance to Low-temperature in Cucumber (Cucumis sativus L.) Yu Shuancang and Cui Hongwen (P.R. China) CGC 21:14-15 (1998) 6. Free Proline Contents and Catalase Activity in Cucumber Leaves at Elevated Temperatures Meng Zhang, Hongwen Cui and Sheng Zhao (P.R. China) CGC 21:16-17 (1998) 7. Stand Correction Methods for Cucumber Fruit Yield Christopher S. Cramer and Todd C. Wehner (USA) CGC 21:18-20 (1998) 8. -
Correlating Sensory Attributes, Textural Parameters and Volatile Organic
CORRELATING SENSORY ATTRIBUTES, TEXTURAL PARAMETERS AND VOLATILE ORGANIC COMPOUNDS FOR THE ASSESSMENT OF DISTINCTIVE QUALITY TRAITS OF MELON AND PEACH FRUIT CULTIVARS Tiago Luís Cardoso Ferreira Pinhanços de Bianchi Per citar o enllaçar aquest document: Para citar o enlazar este documento: Use this url to cite or link to this publication: http://hdl.handle.net/10803/671744 ADVERTIMENT. L'accés als continguts d'aquesta tesi doctoral i la seva utilització ha de respectar els drets de la persona autora. Pot ser utilitzada per a consulta o estudi personal, així com en activitats o materials d'investigació i docència en els termes establerts a l'art. 32 del Text Refós de la Llei de Propietat Intel·lectual (RDL 1/1996). Per altres utilitzacions es requereix l'autorització prèvia i expressa de la persona autora. En qualsevol cas, en la utilització dels seus continguts caldrà indicar de forma clara el nom i cognoms de la persona autora i el títol de la tesi doctoral. No s'autoritza la seva reproducció o altres formes d'explotació efectuades amb finalitats de lucre ni la seva comunicació pública des d'un lloc aliè al servei TDX. Tampoc s'autoritza la presentació del seu contingut en una finestra o marc aliè a TDX (framing). Aquesta reserva de drets afecta tant als continguts de la tesi com als seus resums i índexs. ADVERTENCIA. El acceso a los contenidos de esta tesis doctoral y su utilización debe respetar los derechos de la persona autora. Puede ser utilizada para consulta o estudio personal, así como en actividades o materiales de investigación y docencia en los términos establecidos en el art. -
LEAFY, a Homeotic Gene That Regulates Lnflorescence Development in Arabidopsis
The Plant Cell, Vol. 3, 771 -781, August 1991 o 1991 American Society of Plant Physiologists LEAFY, a Homeotic Gene That Regulates lnflorescence Development in Arabidopsis Elizabeth A. Schultz and George W. Haughn’ Biology Department, University of Saskatchewan, Saskatoon, Saskatchewan, S7N OWO, Canada Variation in plant shoot structure may be described as occurring through changes within a basic unit, the metamer. Using this terminology, the apical meristem of Arabidopsis produces three metameric types sequentially: type 1, rosette; type 2, coflorescence-bearing with bract; and type 3, flower-bearing without bract. We describe a mutant of Arabidopsis, Leafy, homozygous for a recessive allele of a nuclear gene LEAFY (LFY), that has an inflorescence composed only of type 2-like metamers. These data suggest that the LFY gene is required for the development of type 3 metamers and that the transition from type 2 to type 3 metamers is a developmental step distinct from that between vegetative and reproductive growth (type 1 to type 2 metamers). Results from double mutant analysis, showing that /fy-7 is epistatic to the floral organ homeotic gene ap2-6, are consistent with the hypothesis that a functional LFY gene is necessary for the expression of downstream genes controlling floral organ identity. INTRODUCTION Angiosperm shoots can be described as a series of re- pattern of development of the main inflorescence, giving peating units (metamers) that are formed sequentially by rise itself to lateral coflorescenceshoots and flowers. Thus, the apical meristem. In the most basic form, a metamer the inflorescence of Arabidopsis should form an infinite consists of a node with the associated leaflike organ, the series of coflorescences if unlimited growth were possible. -
The Dynamics of Medicinal Plants Utilization Practice Nexus Its Health and Economic Role in Ethiopia: a Review Paper
Vol. 11(1), pp. 31-47, January 2019 DOI: 10.5897/IJBC2018.1201 Article Number: 414D9D059783 ISSN 2141-243X Copyright © 2019 International Journal of Biodiversity and Author(s) retain the copyright of this article http://www.academicjournals.org/IJBC Conservation Review The dynamics of medicinal plants utilization practice nexus its health and economic role in Ethiopia: A review paper Yebirzaf Yeshiwas1*, Esubalew Tadele2 and Workinesh Tiruneh3 1Department of Horticulture, Faculty of College Substitutes, Debre Markos University College of Agriculture and Natural Resources P. O. Box 269, Ethiopia. 2Department of Agricultural Economics, Debre Markos University College of Agriculture and Natural Resources P. O. Box 269, Ethiopia. 3Department of Animal Science, Debre Markos University College of Agriculture and Natural Resources, P. O. Box 269, Ethiopia. Received 24 May, 2018; Accepted 11 October, 2018 Medicinal plants play important roles in human and animals disease treatment. 1000 medicinal plant species are identified and reported in the Ethiopian Flora. They contribute and is more preferable for new drug development. Ethiopia has the potential to become an important source country, given the diversity of plants and the rich traditional knowledge regarding their use. The main sources of medicinal plants for utilizers are the wild forests. There is also cultivation practice of medicinal plants in home garden. About 80% of human and 90% of livestock population in Ethiopia depends on utilization of medicinal plants for primary health care. The knowledge transfer of medicinal plants in Ethiopia is largely oral. Most parts of medicinal plants commonly used are leaves and roots. Utilization of leaves for drug preparation is important for conservation of medicinal plants since harvesting leaves may not cause detrimental effect on the plants compared to the root or whole plant collections. -
Interactions Among APETALA1, LEAFY, and TERMINAL FLOWER1 Specify Meristem Fate
The Plant Cell, Vol. 11, 1007–1018, June 1999, www.plantcell.org © 1999 American Society of Plant Physiologists RESEARCH ARTICLE Interactions among APETALA1, LEAFY, and TERMINAL FLOWER1 Specify Meristem Fate Sarah J. Liljegren, Cindy Gustafson-Brown, Anusak Pinyopich, Gary S. Ditta, and Martin F. Yanofsky1 Department of Biology and Center for Molecular Genetics, University of California at San Diego, La Jolla, California 92093 Upon floral induction, the primary shoot meristem of an Arabidopsis plant begins to produce flower meristems rather than leaf primordia on its flanks. Assignment of floral fate to lateral meristems is primarily due to the cooperative activ- ity of the flower meristem identity genes LEAFY (LFY), APETALA1 (AP1), and CAULIFLOWER. We present evidence here that AP1 expression in lateral meristems is activated by at least two independent pathways, one of which is regulated by LFY. In lfy mutants, the onset of AP1 expression is delayed, indicating that LFY is formally a positive regulator of AP1. We have found that AP1, in turn, can positively regulate LFY, because LFY is expressed prematurely in the con- verted floral meristems of plants constitutively expressing AP1. Shoot meristems maintain an identity distinct from that of flower meristems, in part through the action of genes such as TERMINAL FLOWER1 (TFL1), which bars AP1 and LFY expression from the inflorescence shoot meristem. We show here that this negative regulation can be mutual because TFL1 expression is downregulated in plants constitutively expressing AP1. Therefore, the normally sharp phase transi- tion between the production of leaves with associated shoots and formation of the flowers, which occurs upon floral in- duction, is promoted by positive feedback interactions between LFY and AP1, together with negative interactions of these two genes with TFL1. -
Ethnobotanical Study of Traditional Medicinal Plants in and Around Fiche District, Central Ethiopia
Current Research Journal of Biological Sciences 6(4): 154-167, 2014 ISSN: 2041-076X, e-ISSN: 2041-0778 © Maxwell Scientific Organization, 2014 Submitted: December 13, 2013 Accepted: December 20, 2013 Published: July 20, 2014 Ethnobotanical Study of Traditional Medicinal Plants in and Around Fiche District, Central Ethiopia 1Abiyu Enyew, 2Zemede Asfaw, 2Ensermu Kelbessa and 1Raja Nagappan 1Department of Biology, College of Natural and Computational Sciences, University of Gondar, Post Box 196, Gondar, 2Department of Plant Biology and Biodiversity Management, College of Natural Sciences, Addis Ababa University, Post Box 3434, Addis Ababa, Ethiopia Abstract: An ethnobotanical study of medicinal plants was conducted in and around Fiche District, North Shewa Zone of Oromia Region, Ethiopia from September 2011 to January 2012. Ten kebeles were selected from North to South and East to West directions of Fiche District and its surroundings by purposive sampling method. Six informants including one key informant were selected from each kebele for data collection by using printed data collection sheets containing, semi-structured interview questions, group discussion and guided field walk. The plant specimens were identified by using taxonomic keys in the Floras of Ethiopia and Eritrea. The data were analysed using descriptive statistics; informant consensus factor and fidelity level using MS-Excel 2010. Totally, 155 medicinal plants belonging to 128 genera and 65 families were recorded. Most medicinal plants (72.9%) were used for human healthcare in which Lamiaceae was dominant (11%) in which Ocimum lamiifolium, Otostegia integrifolia and Leonotis ocymifolia were the most common species. Herbs were dominant (43.87%) flora followed by shrubs (35.48%). -
LEAFY Maintains Apical Stem Cell Activity During Shoot Development In
RESEARCH ARTICLE LEAFY maintains apical stem cell activity during shoot development in the fern Ceratopteris richardii Andrew RG Plackett1†‡, Stephanie J Conway2†§, Kristen D Hewett Hazelton2, Ester H Rabbinowitsch1, Jane A Langdale1*, Vero´ nica S Di Stilio2* 1Department of Plant Sciences, University of Oxford, Oxford, United Kingdom; 2Department of Biology, University of Washington, Seattle, United States Abstract During land plant evolution, determinate spore-bearing axes (retained in extant bryophytes such as mosses) were progressively transformed into indeterminate branching shoots with specialized reproductive axes that form flowers. The LEAFY transcription factor, which is required for the first zygotic cell division in mosses and primarily for floral meristem identity in flowering plants, may have facilitated developmental innovations during these transitions. Mapping *For correspondence: the LEAFY evolutionary trajectory has been challenging, however, because there is no functional [email protected] overlap between mosses and flowering plants, and no functional data from intervening lineages. (JAL); [email protected] (VSD) Here, we report a transgenic analysis in the fern Ceratopteris richardii that reveals a role for LEAFY in maintaining cell divisions in the apical stem cells of both haploid and diploid phases of the † These authors contributed lifecycle. These results support an evolutionary trajectory in which an ancestral LEAFY module that equally to this work promotes cell proliferation was progressively co-opted, -
Histological Study of Organogenesis in Cucumis Melo L. After Genetic Transformation: Why Is It Difficult to Obtain Transgenic Plants? V Chovelon, V
Histological study of organogenesis in Cucumis melo L. after genetic transformation: why is it difficult to obtain transgenic plants? V Chovelon, V. Restier, N. Giovinazzo, Catherine Dogimont, J. Aarouf To cite this version: V Chovelon, V. Restier, N. Giovinazzo, Catherine Dogimont, J. Aarouf. Histological study of organo- genesis in Cucumis melo L. after genetic transformation: why is it difficult to obtain transgenic plants?. Plant Cell Reports, Springer Verlag, 2011, 30 (11), pp.2001-2011. 10.1007/s00299-011-1108-9. hal- 01332269 HAL Id: hal-01332269 https://hal.archives-ouvertes.fr/hal-01332269 Submitted on 29 May 2020 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. Distributed under a Creative Commons Attribution - NonCommercial| 4.0 International License Version définitive du manuscrit publié dans / Final version of the manuscript published in : Plant Cell Reports, 2011, vol 30 (11) :2001-2011 DOI: 10.1007/s00299-011-1108-9 Histological Study of Organogenesis in Cucumis melo L. after genetic transformation: why is it difficult to obtain transgenic plants? V. Chovelon .V. Restier . N. Giovinazzo . C. Dogimont J. Aarrouf INRA Avignon, UR1052, Unité de Génétique et d’Amélioration des Fruits et Légumes, BP 94, 84143 Montfavet Cedex, France e-mail : [email protected] J.