荆豆沙对甘蓝病胁迫下黄瓜叶绿素荧光参数的影响

Jinghang Hong, Zhangtong Ma, J. Zhao, Junqiu Li, T. Song
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摘要

目的:研究经毒沙对黄瓜幼苗在桃孢胁迫下叶绿素荧光参数的影响。研究设计:采用盆栽人工接种的方法,分析叶绿素含量和叶绿素荧光参数的变化。研究地点和时间:2018年在沈阳农业大学生物科学与技术学院(实验室240)进行。方法:以2.0 mL·L-1的京都沙诱导两叶期幼苗,接种桃蚜24 h,随机选取各处理组黄瓜幼苗进行叶绿素含量和叶绿素荧光参数测定。在接种后1 d、3 d、5 d、7 d和9 d随机采集各处理组黄瓜幼苗叶片,测定叶绿素含量和叶绿素荧光参数。结果:当卡西曲菌侵染黄瓜后,经毒沙能有效提高PSII中枢反应的能量转换效率和PSII的潜在活性,且光合反应活性在前期变化不显著,但在后期显著增加,可缓解光合结构损伤程度。结论:综上所述,植物免疫抗性诱导剂荆豆沙能有效提高黄瓜幼苗PSII的容量和光下PSII的运作效率,减少光合结构的破坏,提高PSII接受和转移电子的能力,减少黄瓜幼苗在西葫芦胁迫下叶绿素的降解和光能的耗散。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Effect of Jingdusha on Cucumber Chlorophyll Fluorescence Parameters under Corynespora cassiicola Stress
Aims: The paper aimed to clarify the effect of Jingdusha on chlorophyll fluorescence parameters of cucumber seedlings under Corynespora cassiicola stress. Study Design: We applied the method of artificial inoculation in the pot and analyzed the changes in the content of chlorophyll and chlorophyll fluorescence parameters. Place and Duration of Study: In 2018, these experiments were conducted in the College of Bioscience and Biotechnology of Shenyang Agricultural University (Lab 240). Methodology: The seedlings in the two-leaf period were induced by 2.0 mL·L-1 of Jingdusha, then inoculated C. cassiicola for 24 h. Cucumber seedlings of each treatment group were randomly selected for the content of chlorophyll and chlorophyll fluorescence parameters determination. The leaves of cucumber seedlings in each treatment group were randomly collected at 1 d, 3 d, 5 d, 7 d and 9 d after inoculation for the determination of the content of chlorophyll and chlorophyll fluorescence parameters. Results: When C. cassiicola infects cucumber, Jingdusha can effectively increase the energy conversion efficiency of the PSII central response and the potential activity of PSII, besides, the photosynthetic reaction activity did not change significantly in the early stage, but increased significantly in the later stage and rescure the degree of photosynthetic structural damage. Conclusion: In conclusion, under C. cassiicola stress, plant immune resistant inducer Jingdusha can effectively increase the capacity of PSII and the efficiency of PSII operation under the light in cucumber seedlings, reduce the damage of photosynthetic structure, increase the ability of PSII to accept and transfer electrons, as well as reduce the degradation of chlorophyll and the dissipation of light energy under C. cassiicola stress.
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