| Effects of exogenous anthocyanins on growth and physiological characteristics of flue\|cured tobacco seedlings under drought stress |
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| DOI：10.7606/j.issn.1000-7601.2022.06.07 |
| Key Words: flue\|cured tobacco drought stress anthocyanin agronomic traits physiological property |
| Author Name | Affiliation | | ZHUANG Ye | Henan Province Dryland Agricultural Engineering Technology Research Center/College of Agronomy, Henan University of Science and Technology, Luoyang, Henan 471023, China | | LIU Ruiheng | Henan Province Dryland Agricultural Engineering Technology Research Center/College of Agronomy, Henan University of Science and Technology, Luoyang, Henan 471023, China | | FU Guozhan | Henan Province Dryland Agricultural Engineering Technology Research Center/College of Agronomy, Henan University of Science and Technology, Luoyang, Henan 471023, China | | WANG Xiaodong | Henan Province Dryland Agricultural Engineering Technology Research Center/College of Agronomy, Henan University of Science and Technology, Luoyang, Henan 471023, China |
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| Abstract: |
| This pot experiment used flue\|cured tobacco varieties of ‘Qinyan 96’ and ‘Yunyan 116’ as experimental materials. The treatments including two water gradients of normal water supply and moderate drought and six concentrations of exogenous anthocyanins were set to study the effects of exogenous anthocyanins on agronomic characters of flue\|cured tobacco seedlings. The results showed that under drought stress, the growth of two flue\|cured tobacco varieties was inhibited, and their physiological properties decreased. Spraying exogenous anthocyanins on the leaves of flue\|cured tobacco seedlings under drought stress significantly increased the plant height, stem circumference, maximum leaf length, maximum leaf width, maximum leaf area, dry weight per plant, net photosynthetic rate stomatal conductance, transpiration rate, maximum photochemical efficiency of PSⅡ, actual photochemical efficiency of PSⅡ and photochemical quenching coefficient. By reducing intercellular CO2 concentration and non\|photochemical quenching coefficient in leaves, it not only reduced the production rate of superoxide anion radical and malondialdehyde, but also increased the activities of superoxide dismutase, peroxidase and catalase in leaves. By enhancing the tolerance of flue\|cured tobacco seedlings to drought stress, it was effective to alleviate the damage of drought stress to the growth and physiological functions of flue\|cured tobacco seedlings. Of which, spraying 3 mg·L-1 anthocyanin on the leaves of ‘Qinyan 96’ had the best effect on promoting the growth of tobacco seedlings, and spraying 4 mg·L-1 anthocyanin on the leaves of ‘Yunyan 116’ also had the best effect on promoting the growth of tobacco seedlings. |
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