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| Effects of spermidine on growth and physiological characteristics of Salix integra under cadmium stress |
| Received:February 08, 2019 |
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| KeyWord:Salix integra;cadmium stress;semi-inhibitory concentration;spermidine |
| Author Name | Affiliation | E-mail | | YIN Ze-run | National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment of Shandong Agricultural University, Taian 271018, China | | | ZHUGE Yu-ping | National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment of Shandong Agricultural University, Taian 271018, China | zhugeyp@sdau.edu.cn | | LOU Yan-hong | National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment of Shandong Agricultural University, Taian 271018, China | yanhonglou@sdau.edu.cn | | PAN Hong | National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment of Shandong Agricultural University, Taian 271018, China | | | CUI Xiu-min | National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment of Shandong Agricultural University, Taian 271018, China | | | WANG Hui | National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment of Shandong Agricultural University, Taian 271018, China | | | FENG Wen-jie | Shandong Modern Innovation Development Promotion Center, Jinan 250000, China | | | FAN Ping | Binzhou Agricultural and Rural Bureau, Binzhou 256600, China | | | LI Ya-ping | National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment of Shandong Agricultural University, Taian 271018, China | |
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| Abstract: |
| To study the effects of exogenous spermidine on the growth and physiological characteristics of S. integra exposed to cadmium stress, a hydroponic nutrient solution experiment with different Cd(0, 10, 20, 30, 40 mg·L-1)concentrations was carried out to determine the semi-inhibitory concentration of Cd for S. integra. Subsequently, the effects of exogenous addition of spermidine(0, 0.1, 0.2, 0.4, 0.8, 1.6 mmol·L-1)on the mitigation of Cd stress were investigated using the semi-inhibitory concentration of Cd on S. integra. The results showed that the semi-inhibitory concentration was 24.50 mg·L-1, and the addition of spermidine effectively alleviated the inhibiting effects of Cd stress on S. integra growth. Compared with control plants, the increased relative growth rate of S. integra in spermidine treatment ranged from 44.97% to 102.76%, and the reduction in hydrogen peroxide content ranged from 54.08% to 67.39%. The relative growth rate, root node number, connection number and bifurcation number increased by 102.76%, 50.33%, 25.20%, and 25.42%, respectively, when treated with 0.4 mmol·L-1 spermidine. Total protein content increased by 43.43%, the activity unit of superoxide anion and the content of hydrogen peroxide decreased by 46.35% and 67.39% that exposed to 0.4 mmol·L-1 spermidine regime. These results suggest that spraying spermidine can effectively alleviate cadmium stress in S. integra var. mandshurica seedlings and the optimum application concentration is 0.4 mmol·L-1. |
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