Effects of 1-aminobenzotriazole on the growth and physiological characteristics of Tamarix chinensis cuttings under salt
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ORIGINAL PAPER
Effects of 1‑aminobenzotriazole on the growth and physiological characteristics of Tamarix chinensis cuttings under salt stress Jia Sun1,2 · Jiangbao Xia2 · Ximei Zhao2 · Li Su1,2 · Chuanrong Li1 · Ping Liu2
Received: 3 May 2020 / Accepted: 9 July 2020 © Northeast Forestry University 2020
Abstract Vegetation restoration is a main ecological remediation 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 physiology of Tamarix chinensis under salt stress and to determine a suitable ABT-1 concentration and soil salinity (Sc) 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 physiological and biochemical indices (e.g., chlorophyll content, superoxide dismutase activity, peroxidase activity, and malondialdehyde content). ABT-1 was effective in improving survival, Project funding: This work was supported financially by the National Natural Science Foundation of China (No. 31770761), the Forestry Science and Technology Innovation Project of Shandong province (2019LY006), the Natural Science Foundation of Shandong province (No. ZR2017LEE023), and the Taishan Scholars Program of Shandong province, P. R. China (No. TSQN201909152). The online version is available at https://www.springerlink.com. Corresponding editor: Yu Lei. * Jiangbao Xia [email protected] 1
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
2
Shandong Key Laboratory of Eco‑Environmental Science for the Yellow River Delta, Binzhou University, Binzhou 256603, People’s Republic of China
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), ABT-1 limited growth and physiological activities. Under a salt stress level (Sc ≤ 0.9%), ABT applied at a 100 mg L−1 concentration increased chlorophyll content and superoxide dismutase and peroxidase activities in the leaves and reduced malondialdehyde accumulation and membrane lipid peroxidation effects. As a result, ABT-1 enhanced the resistance 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 physiological regulatory ability and high salt adaptability Keywords Salt stress · Rooting powder · Gr
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