| Cite this article: | 李英浩,刘景辉.干旱胁迫下腐植酸对燕麦叶绿素荧光特性的调控效应[J].灌溉排水学报,0,():-. |
| LI Linghao,LIU Jinghui.干旱胁迫下腐植酸对燕麦叶绿素荧光特性的调控效应[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Regulatory effect of humic acid on chlorophyll fluorescence characteristics of oat under drought stress |
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LI Linghao1,2, LIU Jinghui1,2
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1.Oat Scientific and Technical Innovation Team,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia 010019;2.China
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| Abstract: |
| 【Objective】The effects of humic acid (HA) on the chlorophyll fluorescence of oat leaves under drought stress were determined. 【Method】 The effects of spraying HA on chlorophyll content and fluorescence parameters of oat leaves under normal water supply, moderate drought stress and severe drought stress were studied by pot experiment.【Results】Water stress caused a significant decrease in Chla+Chlb, Chla/Chlb, Fm, Fv, Fv/Fm, Fv/Fo and qP, while Fo and NPQ were significantly increased. Compared with CK under drought stress, Chla+Chlb increased by 0.6%~40.82%, Chla/Chlb increased by 1.13%~30.09%, Fm increased by 0.7%~121.19%, Fv increased by 1.0%~171.79%, Fv/Fm Increase 0.2%-83.89%, Fv/Fo increase 1.9%~211.56%, qP increase 0.1%~68.30%, NPQ increase 6.02%～73.36%, and Fo decrease 0.70%～14.06%, which under heavy drought stress Significant differences.【Conclusion】Drought stress caused obvious damage to the PSII photoreaction system of oats. Spraying humic acid could alleviate its effects, and the effect was most obvious under severe drought stress. |
| Key words: Humic acid; Oat; Drought stress; Chlorophyll; Chlorophyll fluorescence parameters |
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