| Effects of soaking seeds with uniconazole on morphology, osmotic regulators and endogenous hormones of industrial hemp seedlings under drought stress |
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| DOI：10.7606/j.issn.1000-7601.2020.03.10 |
| Key Words: seed soaking with uniconazole (S3307) industrial hemp drought stress seedling morphology osmotic regulation endogenous hormones |
| Author Name | Affiliation | | JIANG Ying | College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China
Daqing Branch of Heilongjiang Academy of Sciences, Daqing, Heilongjiang 163319, China | | ZUO Guanqiang | College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China | | WANG Xiaonan | Daqing Branch of Heilongjiang Academy of Sciences, Daqing, Heilongjiang 163319, China | | ZHANG Xiaoyan | Daqing Branch of Heilongjiang Academy of Sciences, Daqing, Heilongjiang 163319, China | | HAN Chengwei | Daqing Branch of Heilongjiang Academy of Sciences, Daqing, Heilongjiang 163319, China | | HAN Xicai | Daqing Branch of Heilongjiang Academy of Sciences, Daqing, Heilongjiang 163319, China | | CAO Kun | Daqing Branch of Heilongjiang Academy of Sciences, Daqing, Heilongjiang 163319, China | | ZHAO Yue | Daqing Branch of Heilongjiang Academy of Sciences, Daqing, Heilongjiang 163319, China | | SUN Yufeng | Daqing Branch of Heilongjiang Academy of Sciences, Daqing, Heilongjiang 163319, China | | FENG Naijie | College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China |
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| Abstract: |
| This study used 0.4 mg·L-1 of uniconazole solution to soak the seeds of industrial hemp “Huoma No.1”. The seedlings was treated with three methods that contained normal water supply (CK), drought stress (D), and uniconazole + drought stress (D+S) at the trifoliate stage with a pot experiment. The aim was to study the effects of uniconazole on the morphology, osmotic regulators, and endogenous hormones of hemp seedlings under drought stress. The results showed that compared with the plants under drought stress (D), D+S significantly increased the dry and fresh weights of roots by 46.67%~61.54% and 16.46%~25.53%, respectively; restored the dry and fresh weights of aerial part at the late stage of stress that increased 4.38 and 2.23%, respectively, after 4 days of rehydration; promoted the ability of root growth that the root length, root superficial area, root volume, total projected area of roots, root branches number, root crossing number, and root tip number increased by 34.48%, 34.77%, 69.10%, 70.00%, 29.62%, 54.28%, and 33.07%, respectively, after 8 days of drought stress. Uniconazole increased SPAD value by 28.30%, decreased cell membrane permeability by 17.22%, and increased soluble sugar by 17.32%~36.78%, and soluble protein content by 5.07%~7.94% after 8 days of drought stress. The D+S treatment increased the content of abscisic acid (ABA) for 1.02 fold, decreased the contents of salicylic acid (SA) and jasmonic acid (JA) by 17.79 and 14.40%, respectively, after 8 days of drought stress. It is thus clear that uniconazole can enhance the drought resistance of industrial hemp seedlings and alleviate the damage by regulating their growth and physiological indicators under drought stress. |
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