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作 者 ：胡新生 刘建伟 王世绩

期 刊 ：林业科学 1997年 33卷 2期 页码：107-116

关键词：杨树无性系；温度效应；湿度效应；光合作用；

Keywords:Poplar clones, Effect of temperature, Effect of humidity, Photosynthesis,

摘 要 ：选择两个速生的(群众杨-44和欧美杨25/86)和两个慢生的(小叶杨和欧美杨28/86)杨树无性系,在水培和生长箱控制条件下,测定了净光合速率(Pn)、光饱和点(LSP)、光补偿点(LCP)、表观光量子产量(Φ)、气孔传导度(C_s)和蒸腾速率的变化特点。结果表明,四个杨树无性系的LSP LCP,Φ.C_S和最大的P_n对温度和相对湿度的响应特征不同。这可能反映了杨树无性系生态型差别,同时也为杨树无性系在生理指标基础上进行早期选择提供了证据

Abstract:Effects of temperature and air relative humidity on net photosynthesis rate(P_n)， light saturation point(LSP)，light compcnsation point(LCP)，apparent quantum yield (Ф)，conductance of stomata(Cs)and transpiration were studied in controlled environments， using leaves of water-cultivated plants of four selected poplar clones：Popuhts simonii(Clone A)，P．Euromericana 28/86(Clone B)，P．Popularis 44(Clone C)，and P．Euromerlcana 25/86(Clone D)．Results indicated that there was a variety of response patterns of LSP，LCP，Ф，Cs，maximum of P_n，and transpiration，to temperature and to RH among these four clones．This possibly reflects different ecotypic differences and provides evidence for early selection of poplar clones based on physiological characteristics．

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