Maize GOLDEN2-LIKE genes enhance biomass and grain yields in rice by improving photosynthesis and reducing photoinhibition.,Communications Biology

当前位置： X-MOL 学术 › Commun. Biol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Maize GOLDEN2-LIKE genes enhance biomass and grain yields in rice by improving photosynthesis and reducing photoinhibition.
Communications Biology ( IF 5.2 ) Pub Date : 2020-04-01 , DOI: 10.1038/s42003-020-0887-3
Xia Li ₁ , Peng Wang _{2,

3} , Jing Li ₁ , Shaobo Wei ₁ , Yanyan Yan ₁ , Jun Yang ₄ , Ming Zhao ₁ , Jane A Langdale ₂ , Wenbin Zhou ₁

Affiliation

Photosynthetic efficiency is a major target for improvement of crop yield potential under agricultural field conditions. Inefficiencies can occur in many steps of the photosynthetic process, from chloroplast biogenesis to functioning of the light harvesting and carbon fixation reactions. Nuclear-encoded GOLDEN2-LIKE (GLK) transcription factors regulate some of the earliest steps by activating target genes encoding chloroplast-localized and photosynthesis-related proteins. Here we show that constitutive expression of maize GLK genes in rice leads to enhanced levels of chlorophylls and pigment-protein antenna complexes, and that these increases lead to improved light harvesting efficiency via photosystem II in field-grown plants. Increased levels of xanthophylls further buffer the negative effects of photoinhibition under high or fluctuating light conditions by facilitating greater dissipation of excess absorbed energy as heat. Significantly, the enhanced photosynthetic capacity of field-grown transgenic plants resulted in increased carbohydrate levels and a 30-40% increase in both vegetative biomass and grain yield.

中文翻译：

玉米GOLDEN2-LIKE基因通过改善光合作用和减少光抑制作用来提高水稻的生物量和谷物产量。

在农田条件下，光合作用效率是提高作物单产潜力的主要目标。从叶绿体生物发生到光收集和碳固定反应的功能，光合作用的许多步骤都可能发生效率低下的情况。核编码的GOLDEN2-LIKE（GLK）转录因子通过激活编码叶绿体定位和光合作用相关蛋白的靶基因来调控某些早期步骤。在这里，我们表明玉米GLK基因在水稻中的组成型表达导致叶绿素和色素-蛋白质天线复合物的水平提高，并且这些增加导致通过田间生长的植物通过光系统II的光收集效率提高。叶黄素水平的增加通过促进更多的多余吸收能量作为热量的散发而进一步减轻了在高光或波动光条件下光抑制的负面影响。值得注意的是，田间种植的转基因植物的光合作用能力增强，导致碳水化合物含量增加，营养生物量和谷物产量均提高了30-40％。

更新日期：2020-04-24

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文