安徽农业科学2025，Vol.53Issue(12)：74-80,87,8.DOI:10.3969/j.issn.0517-6611.2025.12.018
低·高温胁迫对尾巨桉幼苗光合特征和生长的影响
Effects of Low and High Temperature Stress on Photosynthesis and Growth of Seedlings of Eucalyptus urophylla×E.grandis from Dif-ferent Sources
摘要
Abstract
[Objective]In order to investigate the effects of extreme climate on photosynthesis and seedling growth of Eucalyptus urophylla×E.grandis.[Method]We compared the photosynthesis and growth affected by low(5℃/0℃)and high temperature(40℃/36℃)(day/night)between seedlings from Bagui Seedlings Co.,LTD.(BG)and another anonymous nursery(NBG).[Result]The results showed that photosyn-thetic rate,stomatal conductance,intercellular CO2 concentration and transpiration rate of BG seedlings were significantly higher than those of NBG seedlings at room temperature.The seedling photosynthesis and growth rate decreased significantly with low and high temperature stress.The photosynthetic parameters of BG seedlings were also significantly higher than those of NBG after low or high temperature treatment.The cold and heat damage indexes of BG seedlings were 0-1 and 2-3,respectively,yet those of NBG seedlings were 1-2 and 3-4,respectively.[Conclusion]This indicated that BG seedlings had a stronger photosynthetic ability than NBG seedlings in normal temperature and have stron-ger resistance and recovery ability in extreme climate stress.关键词
尾巨桉幼苗/低温胁迫/高温胁迫/光合速率/气孔导度Key words
Eucalyptus urophylla×E.grandis seedlings/Low temperature stress/High temperature stress/Photosynthetic rate/Stomatal con-ductance分类
农业科技引用本文复制引用
周雪梦,周晓果,温远光,吴衍霖,杨婷,邓少虹,高惠,黄勇杰,陈秋海..低·高温胁迫对尾巨桉幼苗光合特征和生长的影响[J].安徽农业科学,2025,53(12):74-80,87,8.基金项目
广西自然科学基金项目(2023GXNSFAA026415) （2023GXNSFAA026415）
国家自然科学基金项目(32160358,32360284). （32160358,32360284）
