低·高溫脅迫對(duì)尾巨桉幼苗光合特征和生長(zhǎng)的影響

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中圖分類(lèi)號(hào) S718.5 文獻(xiàn)標(biāo)識(shí)碼A

文章編號(hào) 0517-6611（2025）12-0074-07

doi：10.3969/j.issn.0517-6611.2025.12.018

開(kāi)放科學(xué)（資源服務(wù)）標(biāo)識(shí)碼（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

按樹(shù)人工林是當(dāng)今世界上生長(zhǎng)速度快、產(chǎn)量高、用途廣泛、經(jīng)濟(jì)效益好的人工林之—[1-2]。（剩余11208字）