Comparative Analysis of Drought Tolerance at Seedling Stage Between Maize‘Zheng58’and‘PH4CV’

doi:10.11924/j.issn.1000-6850.casb16100059

Abstract

Abstract: The aims are to rationally use the maize germplasm resource and provide basis for breeding maize varieties with drought tolerance. The 15-day-old seedlings ‘Zheng58’and‘PH4CV’were used as materials for three treatments, drought, normal irrigation, and re-water after drought. The phenotypic difference and drought-relevant physiological indexes were observed. The results showed that, under the drought treatment, leaf temperature of‘PH4CV’seedlings was lower, and water loss was faster in detached leaves of‘PH4CV’. After drought treatment for 5 days, seedlings of‘PH4CV’showed more severe wilting than‘Zheng58’, accompanied with lower relative water content, accumulated more H2O2 and MDA, and had higher ionic leakage level. The root/shoot ratio increased in both‘PH4CV’and‘Zheng58’after drought treatment, and the ratio was much higher in‘Zheng58’. In conclusion, the drought-relevant physiological indexes of‘Zheng58’ are better than that of‘PH4CV’, indicating that the variety has more tolerance to drought stress at seedlings stage.

CLC Number:

S513.035

李保珠. Comparative Analysis of Drought Tolerance at Seedling Stage Between Maize‘Zheng58’and‘PH4CV’[J]. Chinese Agricultural Science Bulletin, 2017, 33(35): 18-24.

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