杂交水稻2026，Vol.41Issue(3)：56-63,8.DOI:10.16267/j.cnki.1005-3956.20250528.115
盐胁迫下外源L-苯丙氨酸对水稻幼根生长和茉莉酸合成的影响
Effect of Exogenous L-Phenylalanine on the Growth of Young Roots and Jasmonic Acid Synthesis in Rice under Salt Stress
摘要
Abstract
To clarify the role of L-phenylalanine(Phe)in the regulation of salt stress in rice,this study analyzed the effects of exogenous Phe on the young root development and jasmonic acid(JA)synthesis of rice seedlings under salt stress from phenotype,cytology,and gene expression perspectives.The results indicated that under 50 mmol/L NaCl,0.3 mmol/L Phe treatment significantly increased the radicle length by 234.9%,expanded the root apical meristem area by 47.1%,and increased the cell length in the elongation zone by 45.7%on the 3rd day.On the 2nd and 3rd days after NaCl+Phe treatment,the JA content in roots synificanthy decreases by 43.7%and 48.4%,respectively,compared with that under NaCl treatment.Quantitative real-time PCR analysis revealed that Phe inhibited the expression of lipoxygenase genes(OsLOX4,OsLOX6,and OsLOX7)and β-oxidase(a rate-limiting enzyme)genes(OsACX2 and OsACX3)involved in the JA synthesis pathway under salt stress.The results demonstrated that exogenous Phe effectively alleviated the inhibitory effect of salt stress on the young root growth,potentially through suppressing the JA synthesis pathway.关键词
水稻/幼根伸长/L-苯丙氨酸/茉莉酸/盐胁迫Key words
rice/elongation of young roots/L-phenylalanine/jasmonic acid/salt stress分类
农业科技引用本文复制引用
黄钰博,黎曼缇,穆凤娇,杨绪磊,许可欣,孙继民,刘桃李,谭炎宁..盐胁迫下外源L-苯丙氨酸对水稻幼根生长和茉莉酸合成的影响[J].杂交水稻,2026,41(3):56-63,8.基金项目
湖南省十大技术攻关项目(2024NK1010) （2024NK1010）
中央引导地方科技发展资金项目(2024ZYT002,2025ZYT024) （2024ZYT002,2025ZYT024）
湖南省农业科技创新资金项目(2024CX08) （2024CX08）
