扬州大学学报（农业与生命科学版）2026，Vol.47Issue(1)：23-30,8.DOI:10.16872/j.cnki.1671-4652.2026.01.003
盐-旱复合胁迫下水稻产量和品质形成特征
Grain yield and quality formation characteristics of rice under the combined salinity-drought stress
摘要
Abstract
This study is aimed to clarify the effects and physiological mechanisms of combined salinity-drought stress on rice grain yield and quality formation,with inbred japonica rice Yandao 12 as material,which is widely planted in coastal saline alkali land in Jiangsu province.The effects of combined salinity-drought stress on rice grain yield and quality formation were studied by setting no stress(control),single salinity stress(0.3％soil salt content),single drought stress(drought stress set from jointing to heading)and combined salinity-drought stress(drought stress set from jointing to heading under 0.3％soil salt content)treatments.The results showed that compared with the control,① the grain yield under single salinity stress,single drought stress and combined salinity-drought stress decreased by 61.6％,19.5％and 68.2％,respectively,across two years.The number of panicles,spikelets per panicle,filled-grain percentage and 1000-grain weight under combined salinity-drought stress were significantly lower than those under single salinity stress and single drought stress.② Under single salinity stress,single drought stress and combined salinity-drought stress,the milling quality(brown rice percentage,milled rice percentage and head rice percentage)and appearance quality(chalky rice percentage,chalky area and chalkiness degree)of rice deteriorated,and the degree of deterioration of rice milling quality and appearance quality was higher under combined salinity-drought stress.③ Single salinity stress,single drought stress and combined salinity-drought stress reduced amylose content,gel consistency and taste value,with a greater de-crease observed under combined salinity-drought stress.Single salinity stress,single drought stress and combined salini-ty-drought stress increased significantly the protein content of rice.④ Single salinity stress,single drought stress and combined salinity-drought stress reduced significantly the breakdown value and increased significantly the setback value.Compared with single salinity stress and single drought stress,the peak viscosity,hot viscosity,cool viscosity and break-down value under combined salinity-drought stress were lower,while higher for setback value.⑤ Single salinity stress,single drought stress and combined salinity-drought stress all reduced the activities of adenosine diphosphate-glucose pyro-phosphorylase(AGPase),granule-bound starch synthase(GBSS),starch synthase(SSS)and starch branching enzyme(SBE)enzymes in grains after heading.Under combined salinity-drought stress,the activities of AGPase,GBSS and SBE in grains after heading were lower than those under single salinity stress and single drought stress.⑥ This study indicates that under single salinity,single drought stress and combined salinity-drought stress,the sink size and sink-filling effi-ciency of rice populations significantly decrease,with a greater decrease and lower yield under combined salinity-drought stress.The degree of deterioration in rice milling quality,appearance quality and cooking taste quality under combined sa-linity-drought stress is higher than that under single salinity stress and single drought stress.Compared with single salini-ty and single drought stress,combined salinity-drought stress reduces the activity of key enzymes involved in starch syn-thesis,deteriorates grain starch enrichment traits,and has a stronger inhibitory effect on rice yield and quality,showing a significant cumulative effect.关键词
水稻/盐-旱复合胁迫/产量/稻米品质Key words
rice/combined salinity-drought stress/grain yield/grain quality分类
农业科技引用本文复制引用
孟天瑶,韦还和,汪璐璐,马唯一,朱济邹,孙乙健,朱广龙,徐云姬,戴其根,周桂生..盐-旱复合胁迫下水稻产量和品质形成特征[J].扬州大学学报（农业与生命科学版）,2026,47(1):23-30,8.基金项目
国家重点研发计划项目(2022YFE0113400) （2022YFE0113400）
江苏省重点研发计划项目(BE2023355) （BE2023355）
江苏省农业科技自主创新资金项目[CX(23)1020] （23）
江苏省高等学校基础科学(自然科学)研究重大项目(23KJA210004) （自然科学）
扬州大学"青蓝工程"项目[扬大人资(2023)-40] （2023）
