水稻 SM1 基因突变会促进固体叶中肋的形成并增加甲烷排放。

IF 4.2 2区 生物学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY Plant Science Pub Date : 2024-10-29 DOI:10.1016/j.plantsci.2024.112312
Hongrui Jiang , Weimin Cheng , Chunpeng Chen , Cheng Fang , Yue Zhan , Liangzhi Tao , Yang Yang , Xianzhong Huang , Kun Wu , Xiangdong Fu , Yuejin Wu , Binmei Liu , Yafeng Ye
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引用次数: 0

摘要

叶中肋系统对植物的生长和发育至关重要,它能促进养分运输、提供结构支撑、实现气体交换并增强对环境胁迫的适应能力。在这项研究中,我们报道了一种水稻实心中脉 1(sm1)突变体,由于实质细胞和牛皮状细胞发育异常,该突变体表现出实心叶气孔和背面卷叶。基于图谱的克隆发现,SM1编码一种胎座拉链蛋白(ZPR)。SM1 主要在叶鞘和基部中脉中表达,并与细胞核相关。进一步的实验表明,SM1能与OSHB1相互作用,阻止OSHB:OSHB二聚体的形成,进而抑制参与调节和维持顶端茎分生组织形成的OSH1的表达。sm1 突变体降低了从芽到根的长距离氧运输能力。sm1突变体氧气运输能力的减弱可能是导致甲烷菌增加和甲烷排放增加的原因之一。总之,我们的研究结果表明,SM1-OSHB1-OSH1 模块调控着水稻叶片气孔的发育。这些模块不仅加深了我们对水稻叶气孔发育分子机制的理解,而且为通过基因改造减少甲烷排放提供了启示。
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Mutation of rice SM1 enhances solid leaf midrib formation and increases methane emissions
The leaf midrib system is essential for plant growth and development, facilitating nutrient transport, providing structural support, enabling gas exchange, and enhancing resilience to environmental stresses. However, the molecular mechanism regulating leaf midrib development is still unclear.In this study, we reported a rice solid midrib 1 (sm1) mutant, exhibiting solid leaf aerenchyma and abaxial rolling leaves due to abnormal development of parenchyma and bulliform cells. Map-based cloning revealed that SM1 encodes a litter zipper protein (ZPR). SM1 was mainly expressed in the sheaths and basal midrib and was associated with the nucleus. Further experiments indicated that SM1 can interact with OSHB1, preventing the formation of OSHB:OSHB dimers and subsequently repressing the expression of OSH1 involved in the regulation and maintenance of apical stem meristem formation. The sm1 mutant reduced long-distance oxygen transport ability from shoot to root. The impaired oxygen transport in the sm1 mutant may have contributed to the increase in methanogens and elevated methane emissions. Collectively, our findings revealed that the SM1-OSHB1-OSH1 modules regulate leaf aerenchyma development in rice. These modules not only enhance our understanding of the molecular mechanism of rice leaf aerenchyma development but also offer insights for reducing methane emissions through genetic modification.
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来源期刊
Plant Science
Plant Science 生物-生化与分子生物学
CiteScore
9.10
自引率
1.90%
发文量
322
审稿时长
33 days
期刊介绍: Plant Science will publish in the minimum of time, research manuscripts as well as commissioned reviews and commentaries recommended by its referees in all areas of experimental plant biology with emphasis in the broad areas of genomics, proteomics, biochemistry (including enzymology), physiology, cell biology, development, genetics, functional plant breeding, systems biology and the interaction of plants with the environment. Manuscripts for full consideration should be written concisely and essentially as a final report. The main criterion for publication is that the manuscript must contain original and significant insights that lead to a better understanding of fundamental plant biology. Papers centering on plant cell culture should be of interest to a wide audience and methods employed result in a substantial improvement over existing established techniques and approaches. Methods papers are welcome only when the technique(s) described is novel or provides a major advancement of established protocols.
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