| Effects of exogenous salicylic acid and calcium chloride on physiology of waxy maize seedlings under low temperature stress |
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| DOI：10.7606/j.issn.1000-7601.2023.06.07 |
| Key Words: exogenous salicylic acid exogenous CaCl2 waxy maize low temperature stress physiological characters |
| Author Name | Affiliation | | DU Jin | College of Agronomy & Resources and Environment, Tianjin Agricultural University, Tianjin, 300392, China | | XIANG Chunyang | College of Agronomy & Resources and Environment, Tianjin Agricultural University, Tianjin, 300392, China | | DING Jianwen | Tianjin Zhongtian Runnong Technology Co., Ltd, Tianjin, 300450, China | | XIN Decai | College of Agronomy & Resources and Environment, Tianjin Agricultural University, Tianjin, 300392, China | | ZHANG Xiaochen | Tianjin Zhongtian Runnong Technology Co., Ltd, Tianjin, 300450, China | | YANG Xing | Tianjin Zhongtian Runnong Technology Co., Ltd, Tianjin, 300450, China |
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| Abstract: |
| Waxy maize is susceptible to low temperature and chilling injury in early spring. In order to explore the effect of exogenous substances on the low temperature stress, ‘Wannuo 2000’ and ‘Runnuo 73’ were used as experimental materials, and waxy maize seedlings were treated with 0, 25, 50, 100, 150 mg·L-1 salicylic acid (SA) and 0, 40, 80, 120, 160 mmol·L-1 calcium chloride (CaCl2). The effects of exogenous SA and CaCl2 on physiological characteristics of maize seedlings under low temperature stress were studied. The results showed that the contents of soluble protein and proline of ‘Wannuo 2000’ and ‘Runnuo 73’ seedlings increased by 42.9%, 18.3%, 96.1% and 16.7% compared with the control, and the activities of catalase and peroxidase increased by 231.0%, 76.5%, 9.5% and 13.9%, which the malondialdehyde content was reduced by 78.7% and 67.1% respectively. The suitable CaCl2 treatment concentration for ‘Wannuo 2000’ and ‘Runnuo 73’ was 40 mmol·L-1, the suitable SA treatment concentration for ‘Wannuo 2000’ was 100 mg·L-1, and the suitable SA treatment concentration for ‘Runnuo 73’ was 50 mg·L-1. Through comprehensive comparative analysis, spraying 40 mmol·L-1 CaCl2 effectively improved the low temperature tolerance of waxy maize seedlings. |
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