Miyazaki Kaho, Ohkubo You, Yasui Hiroto, Tashiro Ryoka, Suzuki Rintaro, Teramura Hiroshi, Kusano Hiroaki, Shimada Hiroaki
Department of Biological Science and Technology, Tokyo University of Science, Katsushika, Tokyo 125-8585, Japan.
Plant Biotechnol (Tokyo). 2021 Sep 25;38(3):367-371. doi: 10.5511/plantbiotechnology.21.0603a.
Late embryogenesis abundant protein (LEA) genes are widely conserved in seed plant species and form a multigene family. While some LEAs are known to respond to environmental stresses, the function of many LEAs is unknown. OsLEA5 (Lea14A) interacts with a regulator of the endosperm storage production, FLO2, suggesting that OsLEA5 may be involved in endosperm quality control. RNAi knockdown line of showed decreased seed weight. Transformant lines overexpressing exhibited improved quality and seed weight of mature seeds when they were developed under high-temperature conditions, while seed quality strongly declined in wild-type plants exposed to high-temperature stress. These findings indicate that contributes to suppressing the deterioration of seed quality when developed under high-temperature conditions.
胚胎发育晚期丰富蛋白（LEA）基因在种子植物物种中广泛保守，并形成一个多基因家族。虽然已知一些LEA对环境胁迫有反应，但许多LEA的功能尚不清楚。OsLEA5（Lea14A）与胚乳贮藏产物的调节因子FLO2相互作用，这表明OsLEA5可能参与胚乳质量控制。RNA干扰敲低株系显示种子重量降低。过表达的转化株系在高温条件下发育时，成熟种子的品质和重量得到改善，而暴露于高温胁迫下的野生型植物种子品质则大幅下降。这些发现表明，在高温条件下发育时，有助于抑制种子品质的恶化。
