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Resilience of oilseed rape plants to drought stress after exogenous application of AM1,an ABA-mimicking ligand

Oil Crop Science 2021年第3期6卷 151-157页

作者： Lixin Liu Chang Chen Junlan Xiong Ni Ma Jun Li Oil Crops Research Institute Chinese Academy of Agricultural SciencesWuhan430062China

AM1(ABA-mimicking ligand)is a newly identified signaling molecule for plants during drought *** investigate the potential role of AM1 in response of rapeseed to drought stress,we conducted experiments by growing rapeseed plants under different levels of drought stress with or without applying AM1 or ABA in a rain *** results indicated that drought significantly inhibited rapeseed growth by damaging the photosyn-thesis system,increasing active oxygen accumulation,destroying the oxidative system,and worsening membrane lipid *** applied AM1 and ABA both relieved the damage to rapeseed that was induced by drought *** with the drought-treated rapeseed,the AM1 treatment significantly improved plant height,number of greelp leaves,root collar thickness,leaf area,dry matter weight,and root cap ratios of *** addition,Pn,Gs,Ci,Tr were significantly increased by the AM1 *** AM1 treatment also alleviated the drought induced reductions in Fv/Fm,ΦPSII,qN and ETR;induced an increase in NPQ;and resulted in decreased active oxygen accumulation and membrane lipid *** the ABA treatment relieved photosynthetic fluorescence and antioxidation system parameters to some extent,the effect was inferior to AM1 *** under AM1 treatment was higher than that under ABA treatment but was still far lower than that of normal water supply *** summary,AM1 is functionally similar to ABA in terms of drought relief and regulation,moreover has a better effect.

关键词： Drought stress Rapeseed AM1 Gas exchange photosynthetic fluorescence Physiological characteristics

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Exogenous application of AM1 improves drought stress tolerance in rapeseed(Brassica napus L.)

Exogenous application of AM1 improves drought stress toleran...

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中国作物学会油料作物专业委员会第八次会员代表大会暨学术年会

作者： LIU Li-xin XIONG Jun-lan LI Jun CHEN Chang ZHANG Chun-lei Key Laboratory of Biology and Genetic Improvement of Oil Crops of Ministry of Agriculture Oil Crops Research Institute of Chinese Academy of Agricultural Sciences

Rapeseed(Brassica napus L.) is one of the most popular oil crops and drought has become an crucial restrictive factor for rapeseed production in *** studies have demonstrated that ABA can effectively improve stress resistance of ***,ABA is limited as a plant growth regulator due to its financial cost and instable structure and is difficult to apply in actual agricultural drought resistance production,especially in field ***1(ABA-mimicking ligand) is a newly identified signaling molecule for plants during drought *** investigate the potential role of AM1 in the drought stress regulation,we conducted experiments by growing rapeseed plants under different levels of drought stress with or without applying AM1 or ABA in a rain *** indicated that drought significantly decreased rapeseed growth by damaging photosynthesis system,increasing active oxygen accumulation,destroying oxidative system,and worsening membrane lipid *** applied AM1 and ABA both relieved the damages to rapeseed induced by drought *** with the drought-treated rapeseed,the AM1-treated rapeseed showed significantly improved plant height,number of green leaves,root collar thickness,leaf area,dry matter weight,and root cap *** addition,Pn,Gs,Ci,Tr were significantly increased by AM1 ***1 treatment also alleviated drought-induced reductions in Fv/Fm,ΦPSII,qN and ETR,induced an increase in NPQ,and resulted in decreased active oxygen accumulation and membrane lipid *** the ABA treatment relieved photosynthetic fluorescence and antioxidation system parameters to some extent,it appeared to be less effective than AM1 *** significant effect on yield factors was found under AM1 or ABA *** under AM1 treatment was higher than that under ABA treatment but was still far lower than that of normal water supply control *** summary,AMI is functionally similar to ABA in terms of drought rel

关键词： drought stress rapeseed AM1 gas exchange photosynthetic fluorescence physiological characteristics

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