An integrated overview of seed development in Arabidopsis thaliana ecotype WS |
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| Institution: | 1. Agro-biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Tianhe District, Guangzhou 510640, China;2. Rice Research Institute, Guangdong Academy of Agricultural Sciences, Tianhe District, Guangzhou 510640, China;1. Wageningen Seed Science Centre, Laboratory of Plant Physiology, Wageningen University, Wageningen, the Netherlands;2. Wageningen Plant Research, Wageningen University & Research, Wageningen, the Netherlands;1. Agro-biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China;2. Hunan Agricultural University, Changsha, 410128, China;3. Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China;1. Plant Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA;2. Genomic Analysis Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA;3. Howard Hughes Medical Institute, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA;4. Genetically Modified Organism Research Center, National Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, Japan;5. Department of Genetics, University of Georgia, Athens, GA 30602, USA;6. Gregor Mendel Institute, Austrian Academy of Sciences, Vienna Biocenter, 1030 Vienna, Austria;7. Department of Molecular Biology, Max Planck Institute for Developmental Biology, 72076 Tübingen, Germany;8. Institute of Digital Agriculture, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, 310021, PR China;9. Human Biology, J. Craig Venter Institute, La Jolla, CA 92037, USA;1. Carnegie Science, Department of Plant Biology, 260 Panama St., Stanford, CA 94305, USA;2. Biology Department, Stanford University, Stanford, CA 94305, USA;3. Division of Biological Sciences, Interdisciplinary Plant Group, and the Missouri Maize Center, University of Missouri, 110 Tucker Hall, Columbia, MO 65211, USA;1. School of BioSciences, University of Melbourne, Royal Parade, Parkville, VIC 3010, Australia;2. Department of Animal, Plant and Soil Sciences, AgriBio Centre, School of Life Sciences, La Trobe University, Bundoora, VIC 3086, Australia;3. ARC Centre of Excellence in Plant Cell Walls, School of BioSciences, The University of Melbourne, Parkville, VIC 3010, Australia |
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| Abstract: | This work is part of a research program aiming at identifying and studying genes involved in Arabidopsis thaliana seed maturation. We focused here on the Wassilewskija ecotype seed development and linked physiological and biochemical data, including protein, oil, soluble sugars, starch and free amino acid measurements, to embryo development, to obtain a complete and thorough reference data set. A. thaliana seed development can be divided into three stages. During early embryogenesis (i.e. morphogenesis), seed weight and lipid content were low whereas important amounts of starch were transiently accumulated. In the second stage, or maturation phase, a rapid increase in seed dry weight was observed and storage oils and proteins were accumulated in large quantities, accounting for approximately 40% of dry matter each at the end of this stage. During the third and last stage (late maturation including acquisition of desiccation tolerance), seed dry weight remained constant while an acute loss of water took place in the seed. Storage compound synthesis ended concomitantly with sucrose, stachyose and raffinose accumulation. This study revealed the occurrence of metabolic activities such as protein synthesis, in the final phase of embryo desiccation. A striking correlation between peaks in hexose to sucrose ratio and transition phases during embryogenesis was observed. |
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