A Study on Drought Adaptability and Its Physiological Mechanism of Summer Maize

doi:10.3321/j.issn:1000-7091.1990.04.009

Abstract

Abstract: Drought adaptability and physiological characteristics at different growth periods of 3 different maize hybrids were tested and analyzed under the conditions of field and plastic shed from 1987 to 1988. The results showed that the adaptable degrees to the drought were all different when summer maize hybrids were drought. The hybrids with high drought resistance had higher root activities, better stomatal adjustment and better adaptability to water contents. Physiologically, the drought tolerance was mainly due to the steady content of chlorophyll, less injured cell membrane and greater amounts of free proline accumulation. As a synthesized result above two functions, the drought tolerant hybrid possessed a higher coefficient of drought resistance and produced more yield. Furthermore, a preliminary study on the mechanism of drought resistance and the relationship between the drought resistance and the diffusion activity of stomata and the free proline accumulation was discussed

Key words: Summer maize, Drought resistance, Drought hardiness

Wang Chang, Lin Qiuping, Gong Donghua, Li Puan, Zhang Zanping, Fu Guozhan. A Study on Drought Adaptability and Its Physiological Mechanism of Summer Maize[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1990, 5(4): 54-60. doi: 10.3321/j.issn:1000-7091.1990.04.009.

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