不透明蛋白2对AGPL2的转激活是甜玉米淀粉积累和籽粒硬度的主要原因。

IF 5.7 2区 生物学 Q1 PLANT SCIENCES
Jianjian Chen, Bin Wang, Xiaolong Chen, Xianwen Zhang, Huabing Lu, Xuegao Lv, Guihua Lv, Ruiqiu Fang
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引用次数: 0

摘要

籽粒硬度是衡量甜玉米品质的重要指标。核硬度形成和调控的机制尚不清楚。在本研究中,我们发现甜玉米淀粉和蛋白质组成的胚乳与籽粒硬度呈正相关。AGPL2编码AGPase的一个亚基,在不同甜玉米品种的胚乳中表达差异,与甜玉米中AGPase残留活性和淀粉合成有关。不透明2 (O2)是胚乳发育的关键调控转录因子,直接与AGPL2启动子结合,激活其表达,导致甜玉米淀粉积累。综上所述,这些结果揭示了O2-AGPL2模块参与甜玉米籽粒硬度调节的新机制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Transactivation of AGPL2 by Opaque2 is responsible for starch accumulation and kernel hardness in sweet corn.

Kernel hardness is an important indicator of sweet corn quality. The mechanism underlying kernel hardness formation and regulation remains poorly understood. In this study, we showed that the endosperm composed of starch and protein was positively correlated with kernel hardness in sweet corn. AGPL2, encoding a subunit of AGPase, was differentially expressed in endosperm of different sweet corn cultivars and was responsible for residual AGPase activity and starch biosynthesis in sweet corn. Opaque2 (O2), a key regulatory transcriptional factor for endosperm development, directly bound to the promoter of AGPL2 and activates its expression, resulting in the accumulation of starch in sweet corn. Taken together, these results unraveled a novel mechanism whereby O2-AGPL2 module participate in regulation of kernel hardness in sweet corn.

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来源期刊
Journal of Experimental Botany
Journal of Experimental Botany 生物-植物科学
CiteScore
12.30
自引率
4.30%
发文量
450
审稿时长
1.9 months
期刊介绍: The Journal of Experimental Botany publishes high-quality primary research and review papers in the plant sciences. These papers cover a range of disciplines from molecular and cellular physiology and biochemistry through whole plant physiology to community physiology. Full-length primary papers should contribute to our understanding of how plants develop and function, and should provide new insights into biological processes. The journal will not publish purely descriptive papers or papers that report a well-known process in a species in which the process has not been identified previously. Articles should be concise and generally limited to 10 printed pages.
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