植物研究2017，Vol.37Issue(4)：521-528,8.DOI:10.7525/j.issn.1673-5102.2017.04.006
遮荫对黑茶藨子叶片形态结构和光合特性的影响
Effects of Shading on Anatomical Structure and Photosynthetic Characteristics of Ribes nigrum L.Leaves
摘要
Abstract
We studied the anatomical structure and photosynthetic characteristics of Ribes nigrum L.leaves under different shading degrees(full sunlight,20％,60％ of shading degree) and different shading time (early,middle,and late).The thickness of leaf under 20％ and 60％ shading treatments were lower than that under full sunlight treatment with significant differences,and the epidermis thickness were higher in the opposite way.The ratio of palisade tissue to spongy tissue decreased as the increase of shading degree,which increased with the extension of shading time.In early and middle shading stage,the photosynthetic rate(Pn) of 20％ shading treatment was little higher than that under full sunlight treatment,but there was no significant difference (P ＞0.05),the transpiration rate (Tr) and water use efficiency (WUE) were changed in the same circumstances.The Pn of 60％ shading treatments were lower than that under full sunlight treatment significantly(P ＜ 0.05).In late shading stage,the Pn of 60％ shading treatments were significantly higher than that under full sunlight treatment(P ＜ 0.05),and the WUE,Tr and Stomatal Conductance (Gs) were higher than that under full sunlight and 20％ shading treatment.Therefore,these changes of the anatomical structure were helpful for R.nigrum to improve the utilization of luminous energy,and different shading time resulted in the change of photosynthetic characteristics.With the photosynthetic characteristics and anatomical structure of R.nigrum leaves,the R.nigrum should be shadowed in different degrees (20％ shading treatment in early and middle stage,60％ shading treatment in late stage) during the different stages,which can improve the efficiency of using light and water,maintain higher photosynthetic rate and retard the aging process.关键词
黑茶藨子/遮荫/光合特性/解剖结构Key words
Ribes nigrum L./shading/photosynthetic characteristics/anatomical structure分类
农业科技引用本文复制引用
李芯妍,滕志远,徐启江,张会慧,郑宝江..遮荫对黑茶藨子叶片形态结构和光合特性的影响[J].植物研究,2017,37(4):521-528,8.基金项目
中央高校基本科研业务费专项资金项目(2572014EA03)The Fundamental Research Funds for the Central Universities(2572014EA03) （2572014EA03）
