1.黑龙江大学现代农业与生态环境学院,哈尔滨 150080;2.中国农业科学院作物科学研究所/作物基因资源与育种全国重点实验室, 北京 100081;3.新疆农业科学院粮食作物研究所,乌鲁木齐 830091
研究方向为玉米抗旱基因挖掘与功能验证,E-mail: 573482278@qq.com
路运才,研究方向为玉米逆境生物学,E-mail: luyuncai@hlju.edu.cn
张登峰,研究方向为玉米种质资源创新与利用,E-mail: zhangdengfeng@caas.cn
财政部和农业农村部国家现代农业产业技术体系建设专项(CARS-02-03);黑龙江省高等学校基本科研业务费项目(2024-KYYWF-0119)
1.College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080;2.Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/State Key Laboratory of Crop Gene Resources and Breeding, Beijing 100081;3.Institute of Grain Crops, Xinjiang Academy of Agricultural Sciences, Urumqi 830091
Foundation projects: China Agriculture Research System of MOF and MARA (CARS-02-03); Basic Research Funds for Higher Education Institutions in Heilongjiang Province (2024-KYYWF-0119)
干旱是影响我国玉米生产的最主要非生物胁迫之一,lncRNA在植物应对干旱等多种非生物逆境胁迫中发挥重要作用,因此挖掘玉米抗旱相关lncRNA基因并解析其分子机理对玉米抗旱分子育种具有重要意义。通过对自交系H082183和旅28田间苗期抗旱性鉴定,发现在中度干旱胁迫下,H082183叶片相对含水量显著高于旅28,说明H082183苗期抗旱性更强。转录组测序结果显示,在中度和重度干旱胁迫下,旅28和H082183间差异表达lncRNA分别有56个和91个,这些lncRNA主要与作物逆境胁迫、脱水和ABA信号通路响应相关。挖掘到调控ABA信号通路途径ASR3(abscisic acid stress ripening3)基因的lncRNA基因TCONS_00065324,可调控抗旱相关转录因子基因Zm00001d023336(编码WRKY转录因子蛋白)的lncRNA基因TCONS_00045452和Zm00001d043368(编码TCP转录因子蛋白)基因的lncRNA基因TCONS_00081959等,可调控抗旱相关功能蛋白基因分子伴侣基因Zm00001d032084的lncRNA基因TCONS_00023643等,蜡质合成相关基因glossy13的lncRNA基因TCONS_00095153,GDSL酯酶基因Zm00001d044821的lncRNA基因TCONS_00211191,以及LEA蛋白基因Zm00001d036283的lncRNA基因TCONS_00160812等,这些抗旱相关lncRNA及其靶基因将作为重要的抗旱候选基因用于进一步研究。
Drought is one of the major abiotic stresses affecting maize production in China. Long non-coding RNAs (lncRNAs) play crucial roles in plant responses to various abiotic stresses, including drought. This study revealed that the inbred line H082183 exhibited significantly higher relative water content than Lv28 under moderate drought stresses at the seeding stage, indicating superior drought resistance in H082183. RNA-seq analysis identified 56 and 91 drought-responsive differentially expressed lncRNAs distinguishing Lv28 and H082183 under moderate and severe drought stress, respectively. Gene Ontology (GO) enrichment analysis highlighted drought resistant associated terms, including stress response, dehydration adaptation, and ABA signaling pathways. Key lncRNAs and lncRNA-target genes involved in drought resistance were identified: TCONS_00065324, targeting ASR3, potentially mediating ABA-dependent signal transduction; TCONS_00045452 and TCONS_00081959, targeting Zm00001d023336 and Zm00001d043368, encoding a WRKY and a TCP transcription factor, respectively; TCONS_00023643, TCONS_00095153, TCONS_00211191 and TCONS_00160812, targeting genes encoding functional proteins associated with molecular chaperones, wax biosynthesis enzymes, and LEA (Late Embryogenesis Abundant) proteins. These lncRNAs and their corresponding target genes will serve as promising candidate genes for drought resistance in further study.
冯新雨,刘旭洋,唐怀君,等.玉米苗期抗旱
