Effects of Aluminum Stress on PhotosyntheticCharacteristics and MDA Content of White Balsam Pear Seedlings
Meng Changjun
Abstract：In order to study the effects of aluminum stress on photosynthetic characteristics and MDA content of white balsam pear seedlings , with clear water treatment as control (CK), 50, 300, 500 and 800 mg/L AlCl3 solutions were designed to determine the photosynthetic characters and MDA content after treated for 20 days.The results showed that 50 mg/L AlCl3 had no significant inhibit effect on the net photosynthetic rate (Pn), transpiration rate, stomatal conductance and intercelluar CO 2 concentration of white balsam pear seedling leaves after 20 -day stress.With the increase of the concentration of aluminum , the inhibition effect on photosynthetic characteristics of white balsam pear seedlings gradually became stronger , and all the photo-synthetic characters showed decreasing trends .Under the stress of 800 mg/L AlCl3 , they were significantly in-hibited compared with CK.With the increase of aluminum concentration , the degree of membrane lipid peroxi -dation increased gradually, and the content of MDA increased significantly .Under the stress of 300, 500 or 800 mg /L AlCl3 , the photosynthesis of white balsam pear was restricted by stomatal factors as well as non stomatal factors.
Keywords：Aluminum stressWhite balsam pearNet photosynthetic rateMalondialdehyde(MDA)
Publication Date：2018-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：4( 64-66,71 )