Effects of CaCl2 on Growth and Physiological Characteristics of Cotton Seedlings under Drought Stress
LIU Tuo
ZHANG Li
LI Zhikun
WANG Rui
MA Zongbin
LI Lingli
LIU Wei
ZHU Wei
Abstract：To reveal the physiological mechanism of different cotton varieties response to CaCl2 under drought stress,three cotton cultivars (Yumian 19,GK20 and Luyanmian 28)with different drought resistance levels were selected as materials,the effects of CaCl2 on growth and physiological characteristics of cotton seedlings were studied under drought stress with PEG.The results showed that under drought stress,except plant height without significant difference among different CaCl2 treatments,the fresh weight,dry weight,SPAD value,proline content,SOD and POD activities of Yumian 19 and Luyanmian 28 of 40 mmol/L CaCl2 treatment were generally higher than the other CaCl2 treatments,while MDA content was generally lower;fresh weight,dry weight,SPAD value,proline content,SOD and POD activities of GK20 of 20 mmol/L CaCl2 treatment were generally higher than the other CaCl2 treatments,while MDA content was lower.This experiment indicated that CaCl2 could improve the resistance to drought stress of cotton seedlings,but the optimal concentrations varied from cultivar to cultivar.
Keywords：cottondrought stressCaCl2seedlings growthphysiological characteristics
Publication Date：2017-05-02
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 56-60 )