| Cite this article: | 邢玉美,万云婷,刘延龙,等.宛氏拟青霉提取物对淹水胁迫下玉米叶片叶绿素荧光动力学参数的影响[J].灌溉排水学报,0,():-. |
| Xing Yumei,Wan Yunting,Liu Yanlong,et al.宛氏拟青霉提取物对淹水胁迫下玉米叶片叶绿素荧光动力学参数的影响[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Effects of extracts from Paecilomyces variotii on the chlorophyll fluorescence transient in leaves of maize under waterlogging stress |
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Xing Yumei, Wan Yunting, Liu Yanlong, Wang Pengfei, Fan Zhen, Zhao Youxin, Tian Xiaofei
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School of Environment and Planning, Liaocheng University
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| Abstract: |
| Abstract:【Background】Flooding is a great challeng in all life stages of maize growth, especially during the seedlings initial development. The crude extract of the endophyte Paecilomyces variotii, a new type of biostimulant, has function of promoting plant growth and enhancing waterlogging stress resistance and is widely used in China. We extracted and testified named as extracts from Paecilomyces variotii (PVE), from the endophytic fungus in wild sea buckthorn. PVE functions as an elicitor not only protecting crops from pathogens but also promoting crop growth. However, the mechanism of PVE in enhancing the tolerance of maize under waterlogging stress is still unclear. Therefore, a laboratory simulation test was conducted to investigate the changes of chlorophyll fluorescence transient curve (OJIP) of maize seeding under waterlogging stress.【Objective】The objective is to investigate the effects of PVE in enhancing waterlogging tolerance of maize.【Method】The results indicated that waterlogging limited the normal growth of maize and reduced the net photosynthetic rate (Pn). Meanwhile, waterlogging tolerance also changed the OJIP curve by reduced the active reaction center per unit area and mitigated the ability of electronic transmission from QA to QB (Ψo and δRo). In addition, PVE alleviated the waterlogging-induced decrease of specific energy fluxes per unit area for absorption (AB/CSm), trapping (TRo/CSm), and electron transport (ETo/CSm), and maintained relatively high heat dissipation capacity (DIo/CSm).【Conclusion】Topdressing of PVE enhanced the waterlogging stress tolerance of maize, and helpful for its quick recover after short-term flooding. |
| Key words: maize, waterlogging;stress, extracts;from Paecilomyces;variotii, chlorophyll;fluorescence transient |
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