低·高温胁迫对尾巨桉幼苗光合特征和生长的影响

打开文本图片集

中图分类号 S718.5 文献标识码A

文章编号 0517-6611（2025）12-0074-07

doi：10.3969/j.issn.0517-6611.2025.12.018

开放科学（资源服务）标识码（OSID）：

Effcts of Low and High Temperature Stress on Photosynthesis and Growth of Seedlings of Eucalyptus urophylla ×E grandis from Different Sources

ZHOU Xue-meng，ZHOU Xiaoguo，WENYuan-guangetal（InstuteofEco-EnvironmentalResearch，Guangxi AcademyofScienceNanning，Guangxi 530007）

Abstract[Obectie]InodertoinvestigateteefetsofextremeclimateonpotosytesisadsedlinggrowthofEucalyptusohla ×E grandis.[Method]We compared the photosynthesis and growth affected by low （ 5°C/0qC ）and high temperature （ 40‰ ）（day/night） betwenedlingsfromBagui SeedlingsCo.，LTD.（BG）andanotheranonymous nursery（NBG）.Result]Theresultsshowedthathotosynthetic rate，stomatal conductance，intercellular CO2 concentration and transpiration rate of BG seedlings were significantly higher than those of NBGsedlingsatootemperatureesdlingpotosthsisdgowthatecreasedsignifcantlywithlowandightemprature. ThephotosyntheticparametersofBGsedingswerealsosignificantlyhigherthantoseofNBGferloworhightmperaturetreamntThe coldand heatdamage indexesof BGseedlings wereO-1and2-3，respectively，yetthoseof NBG sedlings were 1-2and 3-4 ，respectively. [Conclusion]idicatedtatBGsdlingdastrogerpotosyeticbilttanNBGsdlinginoaltemperatueandao ger resistance and recovery ability in extreme climate stress.

Key words Eucalyptus urophylla ×E ： grandis seedlings;Low temperature stress; High temperature stress;Photosynthetic rate;Stomatal conductance

按树人工林是当今世界上生长速度快、产量高、用途广泛、经济效益好的人工林之—[1-2]。（剩余11208字）