浙江农林大学学报2024，Vol.41Issue(4)：688-695,8.DOI:10.11833/j.issn.2095-0756.20230521
浙江省杂草稻种子逆境萌发能力鉴定
Identification of seed germination ability of weedy rice under stress in Zhejiang Province
摘要
Abstract
[Objective]The aim is to investigate the tolerance of weedy rice(Oryza sativa f.spontanea)seeds to different stress environments in Zhejiang Province,and to provide evidence for genetic improvement of rice varieties and prevention and control of weedy rice.[Method]The seeds of weedy rice and cultivated rice(O.sativa'Nangeng 46')collected from the same field in Zhejiang Province were used as material.The germination of seeds and seedling quality were studied under indoor standard germination condition,salt stress(0.15 mol·L-1 NaCl),drought stress(simulated with 15％PEG 6000),flooding stress(simulated with 5 cm water depth),and low temperature stress(at 15 ℃).The antioxidant enzyme activities and malondialdehyde(MDA)content of seedlings under drought and salt stress were measured.[Result]Under standard germination conditions,the germination indicators of weedy rice seeds were significantly better than those of cultivated rice(P＜0.05).Different environmental stresses inhibited seed germination and affected seedling quality.Under salt stress,the germination rate and germination index of weedy rice seeds were significantly higher than those of cultivated rice,and the seedling length was lower than that of cultivated rice(P＜0.05).Under drought stress,the germination potential,germination rate,and germination index of weedy rice seeds were significantly higher than those of cultivated rice(P＜0.05).After drought and salt stress treatment,the activities of catalase,superoxide dismutase,and peroxidase in weedy rice seedlings were significantly higher than those in cultivated rice,and the MDA content was significantly lower than that in cultivated rice(P＜0.05).Under flood stress,the germination potential and germination index of weedy rice were significantly lower than those of cultivated rice(P＜0.05).Under chilling stress,there was no significant difference in germination indicators between weedy rice and cultivated rice seeds,and the quality of weedy rice seedlings was better than that of cultivated rice.[Conclusion]The germination ability of weedy rice in Zhejiang Province is significantly stronger in suitable environments than that of cultivated rice in the same region,but it is sensitive to flooding stress.Compared with cultivated rice,weedy rice is more tolerant to drought and salt stress,which may be related to its stronger antioxidant activity.[Ch,6 tab.32 ref.]关键词
杂草稻/种子萌发/环境胁迫/抗氧化能力Key words
weedy rice/seed germination/environmental stress/antioxidant capacity分类
农业科技引用本文复制引用
王蓓,孙莉,肖婷,王洋,赵光武..浙江省杂草稻种子逆境萌发能力鉴定[J].浙江农林大学学报,2024,41(4):688-695,8.基金项目
浙江省农业农村厅资助项目(2023SNJF043) （2023SNJF043）
浙江农林大学科研发展基金项目(2023LFR034) （2023LFR034）
