农业生物技术学报2025，Vol.33Issue(12)：2557-2570,14.DOI:10.3969/j.issn.1674-7968.2025.12.001
荫蔽胁迫对水稻'明恢63'和'福香占'光合作用及产量性状的影响
Effects of Shading Stress on Photosynthetic and Yield Traits of Oryza sativa'Minghui63'and'Fuxiangzhan'
摘要
Abstract
Shading stress is a common abiotic stress faced by crops.Rice(Oryza sativa)is a light-loving crop.To clarify the characteristics and physiological mechanisms underlying the response of rice varieties with different shade tolerances to shade stress,'Minghui 63'(a relatively shade-tolerant restorer line)and'Fuxiangzhan'(a high-quality conventional rice variety with poor shade tolerance)were used as materials in this study.Shade stress treatments were applied at the seedling stage and from the heading to maturity stage,respectively.Differences in photosynthetic traits,biomass,yield traits,and the expression of genes related to photosynthesis and the light reaction pathway were compared between plants subjected to shade stress and those grown under normal light conditions.After shade stress at the seedling stage,the photosynthetic rate,SPAD value(relative chlorophyll content),soluble sugar content,root-shoot ratio,and biomass of both varieties were decreased.The reductions in photosynthetic rate,SPAD value,and soluble sugar content of'Fuxiangzhan'were greater than those of'Minghui 63',while the reduction in biomass was smaller than that of'Minghui 63'.After shade stress from the heading to maturity stage,the growth periods of'Minghui 63'and'Fuxiangzhan'extended by 3 and 4 d,respectively.The contents of chlorophyll A and carotenoids in both varieties increased,while the photosynthetic rate decreased,and the number of sterile pollen grains increased.Fifteen genes related to photosynthesis and the light reaction were differentially expressed in at least 1 variety,but the variation trends differed between the 2 varieties.For'Minghui 63',the biomass decreased by 22.37%,1000-grain weight by 5.94%,seed setting rate by 10.69%,and yield by 15.45%.For'Fuxiangzhan',the biomass increased by 19.75%,the number of grains per panicle decreased by 18.04%,the seed setting rate decreased by 14.80%,and the yield decreased by 26.68%.The yield reduction of'Minghui 63'under shade stress was smaller than that of'Fuxiangzhan'.The results of this study clarified the responses of'Minghui 63'and'Fuxiangzhan'to shade stress,which is beneficial to the research on the shade tolerance mechanism of rice and can serve the innovation of shade-tolerant rice germplasm and variety breeding.关键词
水稻/耐阴性/光合性状/产量/'明恢63'/'福香占'Key words
Rice/Shade tolerance/Photosynthetic traits/Yield/'Minghui 63'/'Fuxiangzhan'分类
农业科技引用本文复制引用
蔡秋华,陈丽萍,谢华安,张建福,王颖姮,刘锋,林强,崔丽丽,陈丽娟,解振兴,詹生威,林祁..荫蔽胁迫对水稻'明恢63'和'福香占'光合作用及产量性状的影响[J].农业生物技术学报,2025,33(12):2557-2570,14.基金项目
国家水稻产业技术体系项目(CARS-01-08) （CARS-01-08）
福建省人民政府-中国农业科学院协同创新工程"5511"项目(XTCXGC2021019) （XTCXGC2021019）
福建省财政专项-福建省农业科学院科技创新团队(CXTD2021005-3) （CXTD2021005-3）
福建省科技重大专项(2024NZ029027) （2024NZ029027）
中央引导地方科技发展专项(2022L3018) （2022L3018）
