RH17 acts in repression of reproductive fate and autonomous seed coat development in sexual Arabidopsis.
RH17 acts in repression of reproductive fate and autonomous seed coat development in sexual Arabidopsis.
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DOI：
10.1242/dev.198739
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发表时间：
2021-09
期刊：
影响因子：
4.6
通讯作者：
Ron Eric Stein;Berit H Nauerth;Laura Binmöller;Luise Zühl;Anna Loreth;Maximilian Reinert;D. Ibberson;A. Schmidt
中科院分区：
文献类型：
--
作者：
Ron Eric Stein;Berit H Nauerth;Laura Binmöller;Luise Zühl;Anna Loreth;Maximilian Reinert;D. Ibberson;A. Schmidt
植物通过种子进行有性和无性繁殖（无融合生殖）受到复杂的基因调控程序的严格控制。迄今为止，这些都没有得到充分理解。最近的研究表明，RNA解旋酶是植物生殖细胞发育所必需的。这类似于它们在动物中的关键作用，它们参与控制基因活性和维持基因组完整性。在这里，我们确定了拟南芥RH17在生殖发育过程中的新角色。有趣的是，RH17参与生殖命运的抑制和在没有受精的情况下种子发育的要素。在携带突变体rh17等位基因的品系中，观察到雌花组织（胚珠）中多余生殖细胞谱系的发育，偶尔导致每个种子形成两个胚胎。此外，种皮和胚乳的发育也常常是自主启动的。这种诱导的几个功能phenocopying不同的元素的无融合生殖由一个单一的突变是相当特殊的，并表明，RH17的行为在调节控制植物生殖发育。从长远来看，深入了解其作用可能为农业应用提供基础。
Plant sexual and asexual reproduction through seeds (apomixis) is tightly controlled by complex gene regulatory programs. These are to date not fully understood. Recent findings suggest that RNA helicases are required for plant germline development. This resembles their crucial roles in animals, where they are involved in controlling gene activity and the maintenance of genome integrity. Here we identified novel roles of Arabidopsis RH17 during reproductive development. Interestingly, RH17 is involved in repression of reproductive fate and of elements of seed development in the absence of fertilization. In lines carrying a mutant rh17 allele, development of supernumerary reproductive cell lineages in the female flower tissues (ovules) was observed, occasionally leading to formation of two embryos per seed. Furthermore, seed coat and putatively also endosperm development frequently initiated autonomously. Such induction of several features phenocopying distinct elements of apomixis by a single mutation is rather exceptional and suggests that RH17 acts in regulatory control of plant reproductive development. In longer terms, an in depth understanding of its action might provide a basis for harnessing for agricultural applications.