作物研究2024，Vol.38Issue(3)：163-172,10.
PEG-6000模拟干旱胁迫对糯高粱幼苗生理特性的影响
Effects of PEG-6000 Simulated Drought Stress on Physiological Characteristics of Glutinous Sorghum Seedlings
摘要
Abstract
In order to clarify the drought resistance of glutinous sorghum seedlings under drought stress and its physiological response mechanism to drought,and to screen for more resistant varieties,22 sorghum varieties were used as materials to simulate drought stress by using polyethylene glycol(PEG-6000),to compare the growth of glutinous sorghum seedlings from different varieties under drought stress,drought resistance,and to analyze the changes of relevant physiological inde-xes.The results showed that the plant height,root length,seedling fresh mass,leaf relative water content and chlorophyll content of glutinous sorghum seedlings were reduced to different degrees under drought stress compared with the con-trol.The 22 glutinous sorghum varieties were classified into three categories,including eight drought-resistant varieties,11 intermediate varieties,and three drought-sensitive varieties,based on the comprehensive drought tolerance measure(D-value)for evaluating drought tolerance in the seedling stage of glutinous sorghum.The proline content,malondialdehyde content and the activities of superoxide dismutase(SOD)andperoxidase(POD)of glutinous sorghum seedlings increased under drought stress compared with the control,and the drought-resistant glutinous sorghum varieties had higher proline accumulation and lower malondialdehyde increase,while SOD and POD were maintained at higher levels.In a comprehen-sive analysis,M13 had the best drought tolerance.关键词
糯高粱/苗期/干旱胁迫/生理特性/抗旱性评价Key words
sorghum/seedling/drought stress/physiological characteristics/drought tolerance分类
农业科技引用本文复制引用
王睿,马前,李魁印,章洁琼,周光怡,任明见..PEG-6000模拟干旱胁迫对糯高粱幼苗生理特性的影响[J].作物研究,2024,38(3):163-172,10.基金项目
贵州省科技计划项目(黔科合支撑[2022]重点026) （黔科合支撑[2022]重点026）
贵州省2023年省级绿色高产高效建设项目(S2023-002) （S2023-002）
贵州省十大工业(优质烟酒)产业振兴专项(黔财工[2020]198). （优质烟酒）
