首页|Effects of 1-aminobenzotriazole on the growth and physiological characteristics of Tamarix chinensis cuttings under salt stress

Effects of 1-aminobenzotriazole on the growth and physiological characteristics of Tamarix chinensis cuttings under salt stress

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Vegetation restoration is a main ecological reme-diation technology for greening saline and alkaline soils. The objectives of this study were to determine the effect of 1-aminobenzotriazole (ABT-1) on the growth and physiol-ogy of Tamarix chinensis under salt stress and to determine a suitable ABT-1 concentration and soil salinity ( S c) for propagating T. chinensis- cuttings. Cuttings were soaked in water and ABT-1 solutions at three concentrations(50, 100, and 200 mg L −1 ) and propagated in pots containing four soil salinity levels, mild (0.3％), moderate (0.6％), and severe (0.9％ and 1.2％), and compared with a control. The cuttings were measured to determine growth indices and physiologi-cal and biochemical indices (e.g., chlorophyll content, super-oxide dismutase activity, peroxidase activity, and malondial-dehyde content). ABT-1 was effective in improving survival, growth, and physiological processes of cuttings under salt stress. However, there was a threshold effect when using ABT-1 to facilitate propagation under salt stress. ABT-1 effects were insignificant when applied at low concentrations (< 100 mg L −1 ). At a high concentration (> 100 mg L −1 ), ABT-1 limited growth and physiological activities. Under a salt stress level ( S c ≤ 0.9％), ABT applied at a 100 mg L −1 concentration increased chlorophyll content and superox-ide dismutase and peroxidase activities in the leaves and reduced malondialdehyde accumulation and membrane lipid peroxidation effects. As a result, ABT-1 enhanced the resist-ance of T. chinensis to salt stress. However, under high salt stress (> 0.9％) and ABT-1 concentration (> 100 mg L −1 ), the physiological regulatory ability of T. chinensis seedlings weakened. T. chinensis grew well at a salt stress ≤ 0.9％ and ABT ≤ 100 mg L −1 and exhibited relatively high physiologi-cal regulatory ability and high salt adaptability.

Salt stressRooting powderGrowthPhysiological and biochemical indicesTamarix chinensis

Jia Sun、Jiangbao Xia、Ximei Zhao、Li Su、Chuanrong Li、Ping Liu

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College of Forestry,Taishan Forest Ecosystem Research Station,Key Laboratory of State Forestry Administration for Silviculture of the Lower Yellow River,Shandong Agricultural University,Tai'an 271018, People's Republic of China

Shandong Key Laboratory of Eco-Environmental Science for the Yellow River Delta,Binzhou University, Binzhou 256603,People's Republic of China

This work was supported financially by the National Natural Science Foundation of ChinaForestry Science and Technology Innovation Project of Shandong provinceNatural Science Foundation of Shandong provinceTaishan Scholars Program of Shandong province,P.R.China

317707612019LY006ZR2017LEE023TSQN201909152

2021

林业研究(英文版)
东北林业大学,中国生态学学会

林业研究(英文版)

CSTPCDCSCDSCI
影响因子：0.365
ISSN：1007-662X
年,卷(期)：2021.32(4)
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