Effect of High Temperature Stress on Physiology Indices of Mango Seedlings
To investigate the physiological and biochemical mechanism for heat resistance of mango,two Mangifera indica L cv.‘Siji’ and ‘Tainong No.1’ were analyzed under high temperature stress.The results showed that MDA content and relative electrical conductivity both increased heat after treatment,but MDA contents and relative electrical conductivity were higher in ‘Siji’ than ‘Tainong No.1".SOD activities of ’Siji’ first declined and then increased,but the enzyme activities were contrary in ‘Tainong No.1’ and higher than ‘Siji’ cultivar.CAT activities decreased in both cultivars,but the activities were higher than ‘Siji’ cultivar.The free proline contents increased both in the two cultivars,but the contents rising degree in ‘Tainong No.1’ was higher than ‘Siji’ cultivar.The soluble sugar contents were higher in ‘Siji’ cultivar than ‘Tainong No.1’ after treated 12 h,but the results were opposite after treated 72 h.The soluble protein contents of both cultivars first declined and then increased,but the rising degree in ‘Siji’cultivar was higher than‘Tainong No.1’.The chlorophyll and relative water contents decreased in the two cultivars,but the contents were lower in ‘Siji’cultivar than ‘Tainong No.1’ Comprehensive comparative analysis showed that ‘Tainong No.1’ was much more heat resistant than ‘Siji’cultivar.
国家科技期刊平台
NSTL
万方数据
维普
