文章摘要
苏金强,谢晓清,林秋金,张天翔.外源赤霉素对盐胁迫下百香果种子萌发及幼苗生长的影响[J].广东农业科学,2023,50(10):66-74
PDF    HTML 外源赤霉素对盐胁迫下百香果种子萌发及幼苗生长的影响
Effects of Exogenous Gibberellin on Seed Germination and Seedling Growth of Passion Fruit Under Salt Stress
  
DOI:10.16768/j.issn.1004-874X.2023.10.008
中文关键词: 百香果  盐胁迫  赤霉素  种子萌发  幼苗生长
英文关键词: Passifl ora edulis Sims  salt stress  gibberellin  seed germination  seedling growth
基金项目:福建省公益类科研院所专项(2020R11010003)
作者单位
苏金强,谢晓清,林秋金,张天翔 福建省热带作物科学研究所福建 漳州 363001 
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中文摘要:
      【目的】研究施加外源赤霉素对盐胁迫下百香果种子萌发及幼苗生长的影响。【方法】不同浓度(50、100、150 mg/L)NaCl 溶液模拟盐胁迫,分别采用不同浓度的赤霉素进行百香果种子浸种处理(50、100 mmol/L)和幼苗叶面喷施处理(25、50 mmol/L),通过测定种子的发芽、生理指标以及幼苗的生长、生理指标,分析外源赤霉素对盐胁迫下百香果的生理调控效应。【结果】在 150 mg/L NaCl 胁迫下,50 mmol/L 赤霉素浸种处理可以使百香果种子的发芽率和发芽指数分别提高 20.4% 和 16.3%,促进百香果胚芽长度和胚根长度分别增加 7.9%和 20.5%,MDA 含量下降 10.8%,可溶性蛋白含量、SOD 活性和 POD 活性分别提高 5.5%、21.3% 和 28.5%。在 150 mg/L NaCl 胁迫下,叶面喷施 25 mmol/L 赤霉素后,百香果幼苗的叶片数量、株高、根长和地茎分别提高16.3%、20.3%、20.9% 和 19.4%,同时幼苗叶片的叶绿素含量、可溶性蛋白含量、SOD 活性和 POD 活性分别提高 13.0%、26.2%、12.0% 和 9.3%。【结论】外源赤霉素浸种处理可显著促进盐胁迫下百香果种子的萌发,对胚芽、胚根生长所受到的抑制具有明显的缓解作用;叶面喷施赤霉素可明显缓解 100、150 mg/L 盐胁迫对百香果幼苗生长的影响,尤其是对 150 mg/L 盐胁迫处理幼苗的缓解效应特别明显。
英文摘要:
      【Objective】The effects of exogenous gibberellin on seed germination and seedling growth of passion fruit under salt stress were studied. 【Method】Different concentrations (50, 100, 150 mg/L) of NaCl solution were used to simulate salt stress, and different concentrations of gibberellin were used for seed soaking treatment (50, 100 mmol/L) and foliar spraying treatment (25, 50 mmol/L) of passion fruit. The physiological regulation effects of exogenous gibberellin on passion fruit under salt stress was analyzed by measuring the germination and physiological indexes of the seeds, as well as the growth and physiological indexes of the seedlings. 【Result】Under 150 mg/L NaCl stress, 50 mmol/L gibberellin soaking treatment could increase the germination rate and germination index of passion fruit seeds by 20.4% and 16.3%, respectively. It promoted the increase of embryo length and radicle length of passion fruit by 7.9% and 20.5%, respectively. At the same time, the MDA content decreased by 10.8%, the soluble protein content, SOD activity and POD activity increased by 5.5%, 21.3% and 28.5%, respectively. After spraying 25 mmol/L gibberellin on the leaves under 150 mg/L NaCl stress, the number of leaves, plant height, root length and stem diameter of passion fruit seedlings increased by 16.3%, 20.3%, 20.9% and 19.4%, respectively; furthermore, the chlorophyll content of leaves, soluble protein content, SOD activity and POD activity of the seedlings increased by 13.0%, 26.2%, 12.0% and 9.3%, respectively.【Conclusion】The seed soaking treatment with gibberellin solution could significantly promote the germination of passion fruit seeds under salt stress, and had a significant alleviating effect on the inhibition of embryo and radicle growth. Foliar spraying gibberellin could significantly alleviate the effects of 100 and 150 mg/L salt stress on the growth of passion fruit seedlings, especially for 150 mg/L salt stress seedlings.
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