Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, School of Life Science , Jiangsu Normal University , Xuzhou , Jiangsu 221116 , People's Republic of China.
J Agric Food Chem. 2019 Sep 4;67(35):9697-9704. doi: 10.1021/acs.jafc.9b02497. Epub 2019 Aug 20.
In higher plants, seed size is an important parameter and agricultural trait in many aspects of evolutionary fitness. The loss of water-deficiency-induced crop yield is the largest among all natural hazards. Under water-deficient stress, the most prevalent response to terminal stress is to accelerate the early arrest of floral development and, thereby, to accelerate fruit/seed production, which consequently reduces seed size. This phenomenon is well-known, but its molecular mechanism is not well-reviewed and characterized. However, increasing evidence have indicated that water-deficient stress is always coordinated with three genetic signals (i.e., seed size regulators, initial seed size, and fruit number) that decide the final seed size. Here, our review presents new insights into the mechanism underlying cross-talk water-deficient stress signaling with three genetic signals controlling final seed size. These new insights may aid in preliminary screening, identifying novel genetic factors and future design strategies, or breeding to increase crop yield.
在高等植物中，种子大小是一个重要的参数，在许多进化适应性方面都是一个重要的农业性状。在所有自然危害中，因缺水导致的作物减产损失最大。在缺水胁迫下，对终末胁迫最常见的反应是加速花发育的早期停止，从而加速果实/种子的产生，这反过来又会导致种子变小。这种现象是众所周知的，但它的分子机制还没有得到很好的综述和描述。然而，越来越多的证据表明，缺水胁迫总是与三个遗传信号（即种子大小调节剂、初始种子大小和果实数量）相协调，决定最终的种子大小。在这里，我们的综述提出了关于交叉对话缺水胁迫信号与控制最终种子大小的三个遗传信号之间的机制的新见解。这些新的见解可能有助于初步筛选、鉴定新的遗传因素和未来的设计策略，或进行繁殖以提高作物产量。
