Effect of water stress on physiological characteristics and saikosaponin contents in Bupleurum chinense

doi:10.14088/j.cnki.issn0439-8114.2022.15.024

Abstract

Abstract: Taking 2-year-old seedlings of Bupleurum chinense as experimental materials, the effects of four treatments of soil water stress （30%, 50%, 70% and 90% of field capacity） on the physiological characteristics and saikosaponin content of Bupleurum chinense were studied by potted water control. The results showed that light drought stress significantly increased the root to shoot ratio, the content of saikosaponin a and total saikosaponin in Bupleurum chinense and severe drought stress significantly increased the content of soluble sugar, proline, malondialdehyde, saikosaponin d and total saikosaponin in Bupleurum chinense. Soluble protein and FW/BW （free water/bound water） decreased with the increasing degree of drought stress. Comprehensive analysis showed that Bupleurum chinense had a certain drought tolerance; light drought stress was beneficial to the increase of root to shoot ratio and the accumulation of saikosaponin, while excessive soil moisture was unbeneficial to the root growth of Bupleurum chinense and the accumulation of saikosaponin. Therefore, scientific and reasonable water control methods should be adopted during the artificial cultivation period of Bupleurum chinense, and low lying and waterlogged lands should be avoided. The accumulation of effective components in Bupleurum chinense should also be promoted when ensuring the normal growth of plants, for improving the yield and quality of Bupleurum chinense finally.

Key words: Bupleurum chinense DC., water stress, physiological characteristics, saikosaponin

CLC Number:

R284

LIU Qiao-fei, ZHOU Zi-yun. Effect of water stress on physiological characteristics and saikosaponin contents in Bupleurum chinense[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(15): 140-145.

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