植物保护2026，Vol.52Issue(2)：245-254,10.DOI:10.16688/j.zwbh.2025122
高温与饥饿胁迫对十斑大瓢虫生长及抗氧化酶的影响
Effects of high temperature and starvation stress on growth and antioxidant enzyme activity of Megalocaria dilatata
摘要
Abstract
To clarify the effects of high-temperature and starvation stress on the growth,development,and antioxidant enzyme activities of the aphid predator Megalocaria dilatata,heat stress treatments(32℃,36℃,40℃)and a 24 h starvation treatment were applied to determine heat knockdown time and survival rate.In addition,relative reactive oxygen species(ROS)levels and the activities of superoxide dismutase(SOD),catalase(CAT),and total antioxidant capacity(TAC)were determined under these stress conditions.Results showed that increasing temperature significantly prolonged heat knockdown time.Larvae of different instars exhibited varying tolerance to stress,and a significant interaction effect between starvation stress and high-temperature stress on larval survival rate was observed.Both high-temperature and starvation stress significantly induced the upregulation of ROS level.High-temperature stress significantly upregulated the activities of CAT and TAC whereas starvation stress significantly enhanced the activities of SOD and CAT and markedly increased TAC levels.These results contribute to a better understanding of the mechanisms underlying stress tolerance in M.dilatata under adverse environmental conditions.关键词
十斑大瓢虫/非生物胁迫/耐热性/生长发育/抗氧化酶Key words
Megalocaria dilatata/abiotic stress/heat tolerance/growth and development/antioxidant enzymes分类
农业科技引用本文复制引用
皇甫佳一,李平,况觅,李姗蓉,郭璐璐,高冬梅,郭萧..高温与饥饿胁迫对十斑大瓢虫生长及抗氧化酶的影响[J].植物保护,2026,52(2):245-254,10.基金项目
重庆市市级财政科研项目(KYLX20250600128,KYLX20250600065) （KYLX20250600128,KYLX20250600065）
重庆市技术创新与应用发展专项(CSTB2024TIAD-LDX0007) （CSTB2024TIAD-LDX0007）
重庆市蔬菜产业技术体系创新团队(CQMAITS 202406-3) （CQMAITS 202406-3）
