The responses of Amorpha fruticosa ‘Jinye' to drought stress

doi:10.14088/j.cnki.issn0439-8114.2023.07.016

Abstract

Abstract: In order to investigate the effects of continuous drought stress on characteristics of morphology, growth and physiology of Amorpha fruticosa ‘Jinye', and find out its drought-resistances, two-year-old cuttage seedlings of A. fruticosa ‘Jinye' were used as experimental materials, and cuttage seedlings of A. fruticose L. were used as control materials. Potted and continuous drought treatment methods were used to study the effect of drought stress on growth and the physiological indexes such as osmoregulation. The results showed that with the prolongation of drought stress time, the relative water content of soil gradually decreased, and soil relative water content of A. fruticose ‘Jinye' decreased more. At the end of 30-day drought stress, the soil of A. fruticose ‘Jinye' was severely arid, and the relative water content was 24.42%. During the experiment, the seedling height increased continuously and the ground diameter increased first and then decreased, but the increment of seedling height and ground diameter decreased continuously, which indicated that drought stress inhibited the growth of seedling height and ground diameter of the two trees. The contents of MDA and soluble sugar in A. fruticose ‘Jinye' and A. fruticose L. increased gradually with the extension of drought stress time; Proline （Pro） content of A. fruticose ‘Jinye' displayed a trend of first increased and then decreased, while A. fruticosa L. continued to increase. In addition, subordinate function was used to rank their drought resistance and the order was A. fruticose L.> A. fruticose ‘Jinye'. Grey relational analysis found that, plant height and MDA content had the highest correlation with drought resistance, followed by Pro and soluble sugar content. The indicators of A. fruticose ‘Jinye' responded well under drought stress, and A. fruticose ‘Jinye' showed a certain ecological adaptability, which was suitable for planting in arid areas, and could be used as an excellent colorful tree species in arid areas with little rainfall.

Key words: Amorpha fruticosa ‘Jinye', drought stress, growth characteristics, physiological response, drought resistance

CLC Number:

CHEN Bo, FAN Ji-hong, LI Yu-shu, ZOU Yuan-dong, SHI Jin-chao, YU hai-qun. The responses of Amorpha fruticosa ‘Jinye' to drought stress[J]. HUBEI AGRICULTURAL SCIENCES, 2023, 62(7): 89-94.

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