OsMAINTENANCE OF MERISTEM LIKE 1 controls style number at high temperatures in rice.

IF 3.9 2区生物学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY

Plant Molecular Biology Pub Date : 2025-01-21 DOI:10.1007/s11103-025-01553-1

Lorenzo Mineri, Giulia Ave Bono, Elisabetta Sergi, Pierangela E Colleoni, Piero Morandini, Giulio Vicentini, Fabio Fornara, Vittoria Brambilla

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Abstract

OsMAIL1 encodes for a rice protein of the Plant Mobile Domain (PMD) family and is strongly upregulated during floral induction in response to the presence of the florigens Heading date 3a (Hd3a) and RICE FLOWERING LOCUS T1 (RFT1). Although OsMAIL1 expression depends on the florigens, osmail1 null mutants do not show delay in flowering time, rather OsMAIL1 participates in ensuring successful reproduction. Indeed, when day temperatures reach 35 °C (7 °C higher than standard greenhouse conditions), osmail1 mutants show increased sterility due to abnormal pistil development with about half of the plants developing three styles topped by stigmas. OsMAIL1 expression correlates with that of carpel identity genes and RNA-seq of osmail1-1 mutant compared to the wt during inflorescence development showed that OsMAIL1 is required to activate carpel identity genes expression when floral meristems are about to be initiated. OsMAIL1 is a newly characterized rice gene that specifically controls carpel development under heat stress, ensuring plant female fertility in these conditions.

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分生组织1的维持控制水稻高温花柱数。

OsMAIL1编码水稻植物移动结构域（Plant Mobile Domain， PMD）家族的一个蛋白，在花诱导过程中，OsMAIL1在花源抽穗日期3a （Hd3a）和水稻开花位点T1 （RFT1）的存在下被强烈上调。虽然OsMAIL1的表达依赖于开花因子，但OsMAIL1无效突变体并不表现出开花时间延迟，而是OsMAIL1参与确保成功繁殖。事实上，当白天温度达到35°C（比标准温室条件高7°C）时，osmail1突变体由于雌蕊发育异常而表现出更高的不育性，大约一半的植株发育出三种柱头顶部的花柱。OsMAIL1的表达与心皮鉴定基因的表达相关，在花序发育过程中与wt相比，OsMAIL1 -1突变体的RNA-seq表明，在花分生组织即将启动时，OsMAIL1需要激活心皮鉴定基因的表达。OsMAIL1是一个新发现的水稻基因，专门控制热胁迫下心皮的发育，确保这些条件下植物的雌性生育能力。

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来源期刊

Plant Molecular Biology 生物-生化与分子生物学

自引率

2.00%

发文量

审稿时长

1.4 months

期刊介绍： Plant Molecular Biology is an international journal dedicated to rapid publication of original research articles in all areas of plant biology.The Editorial Board welcomes full-length manuscripts that address important biological problems of broad interest, including research in comparative genomics, functional genomics, proteomics, bioinformatics, computational biology, biochemical and regulatory networks, and biotechnology. Because space in the journal is limited, however, preference is given to publication of results that provide significant new insights into biological problems and that advance the understanding of structure, function, mechanisms, or regulation. Authors must ensure that results are of high quality and that manuscripts are written for a broad plant science audience.