Acta Prataculturae Sinica ›› 2021, Vol. 30 ›› Issue (1): 130-139.DOI: 10.11686/cyxb2020070
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Dong LI1,2(), Hong-tao SHEN3, Yan-fang WANG1, Yue-hua WANG1, Li-jun WANG1, Shi-min ZHAO4, Ling LIU1()
Received:
2020-02-21
Revised:
2020-03-23
Online:
2021-01-20
Published:
2021-01-08
Contact:
Ling LIU
Dong LI, Hong-tao SHEN, Yan-fang WANG, Yue-hua WANG, Li-jun WANG, Shi-min ZHAO, Ling LIU. Effects of exogenous melatonin on photosynthetic carbon assimilation and endogenous hormones in tobacco seedlings under drought stress[J]. Acta Prataculturae Sinica, 2021, 30(1): 130-139.
品种 Variety | 处理 Treatment | 株高 Plant height (cm) | 茎粗 Stem diameter (cm) | 地上部鲜重 Shoot fresh weight (g·plant-1) | 地下部鲜重 Root fresh weight (g·plant-1) | 地上部干重 Shoot dry weight (g·plant-1) | 地下部干重 Root dry weight (g·plant-1) | 根冠比 Root-shoot ratio (DW) |
---|---|---|---|---|---|---|---|---|
Y10 | CK | 4.33±0.13b | 0.84±0.03a | 34.25±0.54b | 6.87±0.30a | 4.02±0.09b | 0.69±0.02a | 0.17±0.01c |
MT | 4.80±0.24a | 0.86±0.01a | 37.53±1.29a | 6.97±0.40a | 4.38±0.04a | 0.70±0.03a | 0.16±0.01c | |
MD | 2.78±0.11d | 0.65±0.01c | 9.75±0.59d | 2.31±0.15c | 1.07±0.06d | 0.24±0.02c | 0.22±0.02a | |
MD+MT | 3.40±0.14c | 0.73±0.01b | 16.39±0.37c | 3.51±0.12b | 1.90±0.03c | 0.36±0.02b | 0.19±0.01b | |
Y6 | CK | 13.65±0.75a | 0.74±0.02a | 24.53±0.87b | 6.88±0.09a | 3.15±0.05b | 0.67±0.02a | 0.21±0.01b |
MT | 13.85±0.19a | 0.77±0.01a | 27.83±0.45a | 6.85±0.18a | 3.32±0.03a | 0.67±0.04a | 0.20±0.01b | |
MD | 10.75±0.22b | 0.64±0.02b | 10.89±0.32d | 3.36±0.21c | 1.55±0.03d | 0.42±0.01c | 0.27±0.01a | |
MD+MT | 11.05±0.21b | 0.68±0.02b | 15.95±0.43c | 4.49±0.17b | 2.04±0.03c | 0.53±0.01b | 0.26±0.01a |
Table 1 Effects of exogenous MT on the growth of tobacco seedlings under drought stress
品种 Variety | 处理 Treatment | 株高 Plant height (cm) | 茎粗 Stem diameter (cm) | 地上部鲜重 Shoot fresh weight (g·plant-1) | 地下部鲜重 Root fresh weight (g·plant-1) | 地上部干重 Shoot dry weight (g·plant-1) | 地下部干重 Root dry weight (g·plant-1) | 根冠比 Root-shoot ratio (DW) |
---|---|---|---|---|---|---|---|---|
Y10 | CK | 4.33±0.13b | 0.84±0.03a | 34.25±0.54b | 6.87±0.30a | 4.02±0.09b | 0.69±0.02a | 0.17±0.01c |
MT | 4.80±0.24a | 0.86±0.01a | 37.53±1.29a | 6.97±0.40a | 4.38±0.04a | 0.70±0.03a | 0.16±0.01c | |
MD | 2.78±0.11d | 0.65±0.01c | 9.75±0.59d | 2.31±0.15c | 1.07±0.06d | 0.24±0.02c | 0.22±0.02a | |
MD+MT | 3.40±0.14c | 0.73±0.01b | 16.39±0.37c | 3.51±0.12b | 1.90±0.03c | 0.36±0.02b | 0.19±0.01b | |
Y6 | CK | 13.65±0.75a | 0.74±0.02a | 24.53±0.87b | 6.88±0.09a | 3.15±0.05b | 0.67±0.02a | 0.21±0.01b |
MT | 13.85±0.19a | 0.77±0.01a | 27.83±0.45a | 6.85±0.18a | 3.32±0.03a | 0.67±0.04a | 0.20±0.01b | |
MD | 10.75±0.22b | 0.64±0.02b | 10.89±0.32d | 3.36±0.21c | 1.55±0.03d | 0.42±0.01c | 0.27±0.01a | |
MD+MT | 11.05±0.21b | 0.68±0.02b | 15.95±0.43c | 4.49±0.17b | 2.04±0.03c | 0.53±0.01b | 0.26±0.01a |
品种Variety | 处理Treatment | Fv/Fm | ΦPSⅡ | qP | NPQ |
---|---|---|---|---|---|
Y10 | CK | 0.827±0.009a | 0.482±0.130a | 0.691±0.015a | 1.128±0.099c |
MT | 0.825±0.005a | 0.486±0.040a | 0.681±0.013a | 1.201±0.081c | |
MD | 0.791±0.004c | 0.362±0.009c | 0.529±0.015c | 1.851±0.057a | |
MD+MT | 0.817±0.002b | 0.421±0.005b | 0.635±0.015b | 1.507±0.041b | |
Y6 | CK | 0.831±0.001a | 0.450±0.005a | 0.646±0.011a | 1.333±0.025bc |
MT | 0.830±0.002a | 0.468±0.009a | 0.657±0.006a | 1.235±0.039c | |
MD | 0.809±0.003c | 0.414±0.006b | 0.547±0.005c | 1.678±0.026a | |
MD+MT | 0.829±0.004b | 0.446±0.008a | 0.604±0.007b | 1.426±0.041b |
Table 2 Effect of exogenous MT on chlorophyll fluorescence parameters in leaves of tobacco seedlings under drought stress
品种Variety | 处理Treatment | Fv/Fm | ΦPSⅡ | qP | NPQ |
---|---|---|---|---|---|
Y10 | CK | 0.827±0.009a | 0.482±0.130a | 0.691±0.015a | 1.128±0.099c |
MT | 0.825±0.005a | 0.486±0.040a | 0.681±0.013a | 1.201±0.081c | |
MD | 0.791±0.004c | 0.362±0.009c | 0.529±0.015c | 1.851±0.057a | |
MD+MT | 0.817±0.002b | 0.421±0.005b | 0.635±0.015b | 1.507±0.041b | |
Y6 | CK | 0.831±0.001a | 0.450±0.005a | 0.646±0.011a | 1.333±0.025bc |
MT | 0.830±0.002a | 0.468±0.009a | 0.657±0.006a | 1.235±0.039c | |
MD | 0.809±0.003c | 0.414±0.006b | 0.547±0.005c | 1.678±0.026a | |
MD+MT | 0.829±0.004b | 0.446±0.008a | 0.604±0.007b | 1.426±0.041b |
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