YE Zihui,YE Xiangyang,HE Peilei,et al.ALA Mitigation of Light Stress Effect on Photosynthesis and Vegetative Growth of Chrysanthemum[J].Northern Horticulture,2021,(07):60-65.[doi:10.11937/bfyy.20201683]
ALA对菊花光合作用和营养生长光照胁迫效应的缓解作用
- Title:
- ALA Mitigation of Light Stress Effect on Photosynthesis and Vegetative Growth of Chrysanthemum
- Keywords:
- chrysanthemum; light stress; ALA; photosynthesis
- 文献标志码:
- A
- 摘要:
- 以光照胁迫下的菊花为试材，采用喷施外源ALA方法，研究了外源ALA对菊花光合作用和营养生长光照胁迫效应缓解作用的影响，以期探究ALA的作用机制。结果表明：光照胁迫导致菊花叶片叶绿素含量、光合能力降低，植株生长明显受到抑制，ALA的喷施能够在一定程度上缓解光照胁迫的影响。喷施200 mg?L-1ALA对中度T1和重度T2光照胁迫的菊花净光合速率Pn分别提升11.41%和29.09%，使光饱和点LSP分别提高7.61%和5.29%。在中度和重度光照胁迫下，外源ALA使光补偿点LCP降低。在重度光照胁迫下，喷施外源ALA 100 mg?L-1和200 mg?L-1使菊花叶片叶绿素a含量比不喷施ALA对照处理分别增加42.00%和44.00%，使茎粗分别增加20.14%和27.76%。
- Abstract:
- Chrysanthemum under light stress was used as research object and using the method of spraying exogenous ALA to research the effect of exogenous ALA on the photosynthesis and vegetative growth of chrysanthemum，in order to research the impacts of the ALA.The results showed that the chlorophyll content，photosynthesis decreased and the vegetative growth of chrysanthemum were restrained significantly under the light stress..But spraying exogenous ALA could significantly mitigate the effect of light stress.Spraying 200 mg?L-1 ALA on chrysanthemum under 50%（T1） and 25%（T2）light stress increased net photosynthesis rate (Pn) 11.41% and 29.09%，light saturation point (LSP) 7.61% and 5.29% respectively.Exogenous ALA decreased light compensation point (LCP) under 50%（T1）and 25%（T2）light stress.Comparing with no spraying ALA，spraying 100 mg?L-1 and 200 mg?L-1 ALA on chrysanthemum under 25%（T2）light stress，chlorophyll a content increased 42.00% and 44.00%，stem diameter increased 20.14% and 27.76% respectively.
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备注/Memo
第一作者简介：叶自慧（1988-），女，硕士，工程师，现主要从事风景园林植物资源保护与利用等研究工作。E-mail：szylyzh@163.com.责任作者：孙延军（1979-），男，硕士，教授级高级工程师，现主要从事植物学等研究工作。E-mail：19839862@qq.com.基金项目：广州市民生科技攻关计划资助项目（201903010053）；广东省重点领域研发计划资助项目（2020B020220009）。收稿日期：2020-04-25