Effects of antimony stress on photosynthetic physiological characteristics of watermelon
XU Wei
LUO Jianfeng
HE Ziyu
ZHU Zanjiang
JING Yuanrong
DANG Jiancheng
XIA Binglong
DAI Haitao
GAO Sheng
LUO Yucai
Abstract：In order to study the effects of antimony stress on photosynthetic physiological characteristics of watermelon and provide theoretical basis for breeding watermelon varieties in heavy metal polluted areas.Through pot experiment on three watermelon varieties,the effects of 0(CK)50,100,200,400 mg·kg-1 Sb(Ⅲ)on photosynthetic rate,transpiration rate,intercellular CO2 concentration,stomatai conductance,and activities of superoxide dismutase(SOD),catalase(CAT)and peroxidase(POD),and malondialdehyde(MDA)content in watermelon were studied.The results showed that the photosynthetic rate,transpiration rate and stomatal conductance of Aohua Xinong No.8 at maturity increased firstly and then decreased with the increase of Sb concentration,while the intercellular CO2 concentration increased gradually.The activity of SOD in Xinhong 888 appeared'low inhibition and high enhancement',while the activity of CAT in Aohua Xinong No.8 and Kylin Pioneer F1 appeared'low enhancement and high inhibition'.The POD activity of three watermelon variet-ies was higher than that of CK at different antimony concentrations.The physiological responses of the three watermelon cultivars to antimony stress were different,and the response mechanism of Aohua Xinong No.8 was more advanced.
Keywords：WatermelonAntimonyPhotosynthesisPhysiological characteristics
Publication Date：2023-12-05
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 71-77 )