在不同光照条件下三种匍匐地被植物的生理响应

Physiological Responses of 3 Species Grovel Ground Cover Plants under Different Light Intensity

对不同光照条件(透光度100%、50%、25%)3种地被植物的光补偿点、光饱和点、最大净光合速率、叶绿素a、叶绿素b、叶绿素总量、叶绿素a/b值及类胡萝卜的含量等生理指标变化研究的结果表明:随着光照强度的降低,3种匍匐地被植物的叶绿素a、叶绿素b含量呈逐渐上升趋势,类胡萝卜素含量、光补偿点、最大净光合速率逐渐下降;3种地被植物均有较强的耐荫能力,且连钱草>蛇莓>委陵菜,与对照相比,透光度为25%时,连钱草观赏性状最好;而蛇莓和委陵菜在透光度为50%时,观赏性状最好。

The effects of different light intensity（shading levels were 100%,50%,25% respectively） on physiological indexes of 3 species grovel ground cover plants were investigated.The results showed that as shading increasing,chlrophyll contents of all species along with increment of shade level,but carotenoid content,light compensation points and maximal photosynthetic rate reduced.The all species had stronger shade tolerance,and Glechoma Longituba was better than Duchesnea indica,Duchesnea indica was better than Potentilla reptans var.sericophylla.Compared with control,which shading levels were 25%,had best characteristic of viewing and admiring of Glechoma Longituba;and which a shading levels were 50%,had best characteristic of viewing and admiring of Duchesnea indica and Potentilla reptans var.sericophylla.The results for 3 species groveling ground cover plants give the importance evidence in their popularization and application in virescence.