| 姜颖,左官强,王晓楠,张晓艳,韩承伟,韩喜财,曹焜,赵越,孙宇峰,冯乃杰.烯效唑浸种对干旱胁迫下工业大麻幼苗形态、渗透调节物质及内源激素的影响[J].干旱地区农业研究,2020,38(3):74~80 |
| 烯效唑浸种对干旱胁迫下工业大麻幼苗形态、渗透调节物质及内源激素的影响 |
| 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 |
| 中文关键词: 烯效唑(S3307)浸种 工业大麻 干旱胁迫 幼苗形态 渗透调节 内源激素 |
| 英文关键词:seed soaking with uniconazole (S3307) industrial hemp drought stress seedling morphology osmotic regulation endogenous hormones |
| 基金项目:黑龙江省科学院青年创新基金（CXJQ2018DQ01）；国家重点研发专项（2016YFC0501207-03）；黑龙江省科学院科学研究基金（ZS2019）；黑龙江省科学院院长基金（YZ2018DQ02） |
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| 中文摘要: |
| 选用0.4 mg·L-1的烯效唑(S3307)浸种工业大麻“火麻一号”种子，采用盆栽试验方法，于大麻三叶期设置清水浸种后正常供水（CK）、清水浸种后干旱胁迫（D）和烯效唑浸种后干旱胁迫（D+S）3个处理，探讨烯效唑浸种对干旱胁迫下工业大麻幼苗形态、渗透调节物质及内源激素的影响。结果表明：与D处理的植株相比，D+S处理显著提高了根系干、鲜重，分别提高46.67%~61.54%和16.46%~25.53%；恢复了胁迫后期的地上部干、鲜重，复水4 d后地上部干、鲜重较D处理分别提高了4.38%和2.23%；促进了根系生长的能力，干旱胁迫8 d后，D+S处理较D处理根长、根表面积、根体积、根总投影面积、分枝数、交叉数和根尖数分别增加了34.48%、34.77%、69.10%、70.00%、29.62%、54.28%和33.07%；提高了幼苗叶片SPAD值，降低了细胞膜透性，增加了可溶性糖和可溶性蛋白含量，干旱胁迫8 d后D+S处理较D处理SPAD值增加了28.30%，细胞膜透性减少了17.22%，可溶性糖和可溶性蛋白含量分别增加了17.32%~36.78%和5.07%~7.94%。干旱胁迫8 d后，D+S处理使工业大麻叶片中脱落酸（ABA）含量增加了1.02倍，水杨酸（SA）和茉莉酸（JA）含量分别降低了17.79%和14.40%。可见，烯效唑浸种能通过调控工业大麻幼苗生长及生理指标来增强其抗旱能力，缓解干旱胁迫对幼苗造成的伤害。 |
| 英文摘要: |
| 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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