The rice miR171b–SCL6-IIs module controls blast resistance, grain yield, and flowering

• DOI: 10.1016/j.cj.2021.05.004
• Publication Date: 2021-06-09T08:16:29Z
• Authors: Yan Li; Ying Tong; Xiaorong He; Yong Zhu; Tingting Li; Xiaoyu Lin; Wei Mao; Zeeshan Ghulam Na...; Zhixue Zhao; Jiwei Zhang; Yanyan Huang; Mei Pu; Jing Fan; Jing Wang; Wenming Wang
• Keywords: Panicle; Blast disease; Rice plant

MicroRNAs (miRNAs) act as regulators of plant development and multiple stress responses. Here we demonstrate that the rice miR171b-SCL6-IIs module regulates balance between blast resistance, grain yield, flowering. miR171b-overexpressing plants (OX171b) displayed increased resistance accompanied with enhanced defense responses late heading, whereas blocking miR171b expression in (MIM171) led to greater susceptibility disease, associated compromised early heading. Either overexpressing or silencing significantly affected height number filled seeds per panicle (seed-setting rate), resulting decreased yield. targets SCL6-IIa, SCL6-IIb, SCL6-IIc, whose was suppressed OX171b but MIM171. Mutants SCL6-IIc all phenotypes like OX171b, including markedly disease slightly delayed Amounts gradually leaves during vegetative stage panicles reproductive stage, SCL6-IIs reverse pattern. Together, these results suggest time- space-dependent growth period regulated flowering via SCL6-IIs, appropriate accumulation is essential for development.