SLL1-ZH Regulates Spikelets Architecture and Grain Yield in Rice
SLL1-ZH Regulates Spikelets Architecture and Grain Yield in Rice
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SLL1-ZH 调节水稻的小穗结构和谷物产量
DOI：
10.3390/agriculture11111162
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发表时间：
2021-11
期刊：
影响因子：
--
通讯作者：
Xiaodeng Zhan
中科院分区：
文献类型：
--
作者：
Lianping Sun;Jingxin Wang;Xiaoxia Wen;Zequn Peng;Daibo Chen;Yingxin Zhang;Shihua Cheng;Liyong Cao;Xiaodeng Zhan
小穗发育过程控制着花器官的结构和特性，在水稻产量形成中起着重要作用。在这项研究中，我们表征了一个新的水稻突变体，SLL 1-ZH，它表现出多种缺陷的农艺性状，包括半矮秆，卷叶，畸形穗，和减少产量。形态学分析还表明，SLL 1-ZH突变体的花器官表现出许多缺陷，如开裂的颖片，钩状和薄的外稃，收缩但增厚的内稃，雄蕊和柱头的数目不确定，和异位子房。图位克隆鉴定了LOC_Os09g23200第一外显子中的一个单核苷酸取代（C至G），其负责SLL 1-ZH表型。此外，qPCR分析表明，SLL 1-ZH的相对表达量在花序分化过程中的突变体和不同的花器官中的显着变化。水稻花器官发育相关因子的转录也在突变体中发生了显著变化。因此，我们的研究结果表明，SLL 1-ZH在水稻植株生长，小穗发育和产量方面发挥了重要作用。
The spikelet developmental processes that control structure and floral organ identity play critical roles in rice grain yield formation. In this study, we characterized a novel rice mutant, SLL1-ZH, which exhibits a variety of defective agronomic characters, including semi-dwarf, rolling leaf, deformed panicles, and reduced grains production. Morphological analysis also revealed that the SLL1-ZH mutant shows numerous defects of floral organs, such as cracked glumes, hooked and thin lemmas, shrunken but thickened paleas, an indeterminate number of stamens and stigmas, and heterotopic ovaries. Map-based cloning identified a single nucleotide substitution (C to G) in the first exon of LOC_Os09g23200 that is responsible for the SLL1-ZH phenotype. In addition, qPCR analysis showed a significant change in the relative expression of SLL1-ZH in the mutant during inflorescence differentiation and in the different floral organs. Transcription of rice floral organ development-related factors also changed significantly in the mutant. Therefore, our results suggested that SLL1-ZH plays a great role in plant growth, spikelet development, and grain yield in rice.
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