Effects of PEG simulated drought on the growth of fresh-eating Manihot esculenta Crantz SC9 seedlings

doi:10.14088/j.cnki.issn0439-8114.2020.04.008

Abstract

Abstract: Seedlings of fresh-eating cassava Manihot esculenta Crantz variety South China 9(SC9) were used as materials, different concentrations of PEG were used to study drought resistance under simulated drought stress. The results showed that with the increase of PEG concentration, the drought stress increased, the number of leaf abscission increased, plant height growth, crown area, dry weight of aboveground part, dry weight of leaf, dry weight of supporting structure, leaf area, leaf area, leaf area of SC9 seedlings increased. The fresh weight of the slices decreased gradually, the relative conductivity increased gradually, and the content of photosynthetic pigments increased first and then decreased. That SC9 could adapt to drought environment by changing morphological characteristics, growth indicators and physiological functions of leaves under drought stress, and had good tolerance to drought stress.

Key words: fresh-eating Manihot esculenta Crantz SC9, drought stress, growth condition, physiological index

CLC Number:

S533

DUAN Yuan-jie, MENG Fu-xuan, YANG Yu-jiao, LIU Hai-gang, HUANG Jie, WEI Yun-xia. Effects of PEG simulated drought on the growth of fresh-eating Manihot esculenta Crantz SC9 seedlings[J]. HUBEI AGRICULTURAL SCIENCES, 2020, 59(4): 42-44.

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