Analysis of Large Seeds from Three Different Medicago truncatula Ecotypes Reveals a Potential Role of Hormonal Balance in Final Size Determination of Legume Grains.
Analysis of Large Seeds from Three Different Medicago truncatula Ecotypes Reveals a Potential Role of Hormonal Balance in Final Size Determination of Legume Grains.
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DOI：
10.3390/ijms17091472
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发表时间：
2016-09-08
影响因子：
5.6
通讯作者：
Verdier J
中科院分区：
文献类型：
--
作者：
Bandyopadhyay K;Uluçay O;Şakiroğlu M;Udvardi MK;Verdier J
豆类种子是人类饮食中重要的蛋白质和油脂来源。了解它们的最终种子大小是如何确定的，对于提高作物产量至关重要。在这项研究中，我们分析了三个品种的模式豆科植物，蒺藜苜蓿种子发育，显示对比种子大小。通过比较两个大的种子加入到参考加入A17，我们描述了机制与大的种子大小的决定和潜在的因素调节最终的种子大小。我们观察到胚胎发生过程中的早期事件对最终种子大小有重大影响，延迟的心脏期胚胎发育导致大种子。我们还观察到种子生长速率的差异主要是由于胚细胞数量的差异，暗示细胞分裂速率的作用。大的种子加入可以解释为由于较长的胚胎发生阶段的细胞分裂期延长。根据我们的观察和最近的报道，我们观察到生长素（IAA）和脱落酸（阿坝）的比例可能是一个关键的决定因素的细胞分裂调控在胚胎发生结束。总的来说，我们的研究强调了早期种子发育过程中发生的事件的时间对最终种子大小的确定起决定性作用。
Legume seeds are important as protein and oil source for human diet. Understanding how their final seed size is determined is crucial to improve crop yield. In this study, we analyzed seed development of three accessions of the model legume, Medicago truncatula, displaying contrasted seed size. By comparing two large seed accessions to the reference accession A17, we described mechanisms associated with large seed size determination and potential factors modulating the final seed size. We observed that early events during embryogenesis had a major impact on final seed size and a delayed heart stage embryo development resulted to large seeds. We also observed that the difference in seed growth rate was mainly due to a difference in embryo cell number, implicating a role of cell division rate. Large seed accessions could be explained by an extended period of cell division due to a longer embryogenesis phase. According to our observations and recent reports, we observed that auxin (IAA) and abscisic acid (ABA) ratio could be a key determinant of cell division regulation at the end of embryogenesis. Overall, our study highlights that timing of events occurring during early seed development play decisive role for final seed size determination.
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DOI：
10.1111/tpj.12742
发表时间：
2015-02
期刊：
The Plant journal : for cell and molecular biology
影响因子：
--
作者：
Noguero M;Le Signor C;Vernoud V;Bandyopadhyay K;Sanchez M;Fu C;Torres-Jerez I;Wen J;Mysore KS;Gallardo K;Udvardi M;Thompson R;Verdier J
通讯作者：
Verdier J
影响因子：
7.5
作者：
Chandrasekaran U;Xu W;Liu A
通讯作者：
Liu A
影响因子：
6.2
作者：
Chabaud, M;de Carvalho-Niebel, F;Barker, DG
通讯作者：
Barker, DG
影响因子：
6.9
作者：
Abirached-Darmency, M;Abdel-gawwad, MR;Thompson, R
通讯作者：
Thompson, R
影响因子：
4.2
作者：
CHOJECKI, AJS;BAYLISS, MW;GALE, MD
通讯作者：
GALE, MD