四个杨树无性系在不同温度和相对湿度条件下净光合速率的比较研究  

COMPARISON OF THE NET PHOTOSYNTHESIS RATE OF FOUR POPLAR CLONES AT DIFFERENT TEMPERATURE AND HUMIDITY REGIMES

作　　者：胡新生[1] 刘建伟[1] 王世绩[1] 

机构地区：[1]中国林业科学研究院林业研究所

出　　处：《林业科学》1997年第2期107-116,共10页Scientia Silvae Sinicae

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（Ｃｓ）和蒸腾速率的变化特点。结果表明，四个杨树无性系的ＬＳＰＬＣＰ，Φ．ＣＳ和最大的Ｐｎ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。Effects of temperature and air relative humidity on net photosynthesis rate (P n),light saturation point(LSP),light compcnsation point (LCP),apparent quantum yield(Φ),conductance of stomata (Cs) and transpiration were studied in controlled environments,using leaves of water-cultivated plants of four selected poplar clones: Populus 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,Φ,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.

关 键 词：杨树无性系 温度效应 湿度效应 光合作用 

分 类 号：S792.110.1[农业科学—林木遗传育种]