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Plant Physiol:中山大学王宏斌教授课题组发表植物光效优化研究论文

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摘要 : 近日,国际植物学顶级期刊《plant Physiology》杂志上在线发表了中山大学生命科学学院王宏斌教授团队题为“Optimization of Light Harvesting Pigment Improves Photosynthetic Efficiency”的研究论文

近日,国际植物学顶级期刊《plant Physiology》杂志上在线发表了中山大学生命科学学院王宏斌教授团队题为“Optimization of Light Harvesting Pigment Improves Photosynthetic Efficiency”的研究论文,研究工作提示了一种光效优化的新策略。靳红磊博士为第一作者,王宏斌教授和王金发教授为共同通讯作者。

随着全球人口数量的不断增加,粮食短缺逐渐成为世界性问题之一,提高作物产量迫在眉睫。光合作用可以利用太阳能把无机物转换为有机物,完成物质和能量的双重转换,其效率直接决定着作物产量。然而,自然界中的植物通过光合作用所利用的光能,整体平均不超过0.1%。因此,提高光合作用效率是增加作物产量的重要途径。

王宏斌教授团队通过大规模筛选,鉴定到一个重要的光效调控基因HIGH PHOTOSYNTHETIC EFFICIENCY 1(HPE1)。研究发现HPE1基因编码一个新的叶绿体RNA剪接因子,其缺失改变了细胞核编码的叶绿素相关基因的表达,从而优化了捕光色素,最终增加了光捕获能力和光合作用量子产量,提高了实际光合作用效率。

Plant Physiol:中山大学王宏斌教授课题组发表植物光效优化研究论文
原文链接:

optimization of Light Harvesting Pigment Improves Photosynthetic Efficiency

原文摘要:

Maximizing light capture by light-harvesting pigment optimization represents an attractive but challenging strategy to improve photosynthetic efficiency. Here, we report that loss of a previously uncharacterized gene, HIGH PHOTOSYNTHETIC EFFICIENCY1 (HPE1), optimizes light-harvesting pigments, leading to improved photosynthetic efficiency and biomass production. Arabidopsis (Arabidopsis thaliana) hpe1 mutants show faster electron transport and increased contents of carbohydrates. HPE1 encodes a chloroplast protein containing an RNA recognition motif that directly associates with and regulates the splicing of target RNAs of plastid genes. HPE1 also interacts with other plastid RNA-splicing factors, including CAF1 and OTP51, which share common targets with HPE1. Deficiency of HPE1 alters the expression of nucleus-encoded chlorophyll-related genes, probably through plastid-to-nucleus signaling, causing decreased total content of chlorophyll (a+b) in a limited range but increased chlorophyll a/b ratio. Interestingly, this adjustment of light-harvesting pigment reduces antenna size, improves light capture, decreases energy loss, mitigates photodamage, and enhances photosynthetic quantum yield during photosynthesis. Our findings suggest a novel strategy to optimize light-harvesting pigments that improves photosynthetic efficiency and biomass production in higher plants.

doi:10.​1104/​pp.​16.​00698

作者:王宏斌 点击:

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