Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Anhui Agricultural Sciences》 2010-08
Add to Favorite Get Latest Update

Effects of Air Humidity on Photosynthesis and Physiological Characters in Tomato under High Temperature

WANG Yan-fang et al (College of Horticulture,Shanxi Agriculture University,Taigu,Shanxi 030801)  
[Objective] The purpose was to study the effects of air humidity on the photosynthesis and physiological characters in the tomato under high temperature.[Method] With the tomato variety Dongsheng 1 as the tested material,the tomato seedlings were made for 3 treatments of air humidity as low humidity of 30%-35%,middle humidity of 55%-60% and high humidity of 85%-90% under the high temperature of 35 ℃ and the indexes of photosynthesis and physiology-biochemistry in the tomato seedlings treated for different days were determined.[Result] Under high temperature,the net photosynthetic rate in the tomato seedlings was descended with the decrease of the air humidity and the treating days and after treatment for 21 d,that in the middle and low humidity treatments were 13.0% and 38.6% lower than that in the high humidity treatment.With the decrease of the air humidity,the chlorophyll,soluble sugar content,starch content and SOD activity in the tomato seedlings were all decreased,POD activity were slight higher,the conductivity of plant cell extract was increased obviously and the membrane permeability also became bigger,which caused the decrease of photosynthesis ability and reduction of the dry matter accumulation in plant leaf.[Conclusion] Increasing the air humidity could increase the net photosynthetic rate,SOD activity and photosynthate,which was favorable to the growth of the tomato seedlings.
【Fund】: 山西省科技攻关项目(041018-2)
【CateGory Index】: S641.2
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved