植物营养与肥料学报2024，Vol.30Issue(9)：1833-1844,12.DOI:10.11674/zwyf.2024106
7种十字花科绿肥作物对干旱胁迫的生理应答及抗旱性评价
Physiological response characteristics and comprehensive evaluation of seven cruciferous green manure varieties under drought stress
摘要
Abstract
[Objectives]In order to provide a theoretical basis and technical parameters for screening suitable cruciferous green manure(GM)crops for the development of green agriculture systems under dryland conditions in China,we carried out an indoor cultivation experiment to investigate the effects of drought stress on the growth and physiological responses of cruciferous GM crops during their growth period.[Methods]The changes in photosynthetic and physiological characteristics of seven cruciferous GM varieties under normal watering(80%field water capacity)and drought stress(40%field water capacity)conditions were analyzed,and their drought resistance capacities were comprehensively evaluated using principal component analysis(PCA),aiming to select the suitable cruciferous GM variety with strong drought resistance.[Results]1)Compared to the normal watering treatment,the net photosynthetic rate and transpiration rate of GM leaves under drought stress decreased(P<0.05).2)Under drought stress,the germination rate,root length,and fresh biomass of GM crops increased by 6.1%,147%(P<0.05),and 238%(P<0.05),respectively.3)Drought stress increased the activity of catalase(CAT)in the leaves of Qinyou 10 by 26%(P<0.05)and significantly promoted the activity of superoxide dismutase(SOD)in the leaves of Qinyou 10,and Qingza 11,and increased the activity of peroxidase(POD)in all GM leaves(P>0.05).4)Drought stress increased the proline(Pro)content in the leaves of Zhonglüyou 2,Purple Mustard,Qinyou 10,and Zhongyoufei 1(P<0.05),but significantly decreased the malondialdehyde(MDA)content in Purple Mustard,Zhonglüyou 1,and Zhonglüyou 2.5)Principal component analysis showed that fresh biomass,malondialdehyde content,and CAT and POD activity could be regarded as key indices to evaluate the drought resistance of cruciferous GM crops.The comprehensive drought resistance score for Zhonglüyou 1 was the highest among the seven tested cruciferous GM varieties,indicating strong drought resistance[Conclusions]Overall,due to its strong antioxidant capacity,osmotic regulation ability in the leaves,and long root length,Zhonglüyou 1 exhibites outstanding drought resistance under drought stress conditions and can be regarded as a suitable drought-resistant cruciferous GM variety in the Loess Plateau of China.关键词
干旱胁迫/十字花科绿肥/光合特性/生理特征/主成分分析Key words
drought stress/cruciferous green manure/photosynthetic characteristic/physiological characteristic/principal component analysis引用本文复制引用
孙艳妮,黄冬琳,高亚军,王朝辉,张达斌,王佳蓉,韩高海,唐云丽,魏奭杰,贾振鹏,秦璐,杨璐,曹卫东..7种十字花科绿肥作物对干旱胁迫的生理应答及抗旱性评价[J].植物营养与肥料学报,2024,30(9):1833-1844,12.基金项目
国家重点研发计划项目(2021YFD17002,2023YFD1900900,2018YFD0200403) （2021YFD17002,2023YFD1900900,2018YFD0200403）
国家自然科学基金青年项目(31801942) （31801942）
财政部和农业农村部—现代农业产业技术体系建设专项资金(绿肥,CARS-22). （绿肥,CARS-22）
