江西农业学报2025，Vol.37Issue(4)：62-68,7.DOI:10.19386/j.cnki.jxnyxb.2025.04.009
褪黑素引发甜高粱种子对萌发期抗旱胁迫生理特性的影响
Effect of Melatonin on Physiological Characteristics of Sweet Sorghum Seeds under Drought Stress during Germination
摘要
Abstract
In order to explore the effect of exogenous melatonin(MT)on the physiological characteristics of sweet sorghum under drought stress at germination stage,the sweet sorghum variety Hercules was used as material,and the effect of melatonin initiation treatment on seed germination of sweet sorghum under drought stress(10%PEG simulation)were studied.The results showed that 10µμmol/L and 25µμmol/L melatonin initiation treatments could significantly increase α-amylase activity during seed germination under drought stress,reduce root tip cell damage,significantly increase the contents of endogenous gibberellin and auxin,accumulate more proline,and promote the increase of seed germination potential,vitality index,root length and root surface area.The 100µμmol/Land 500µμmol/L melatonin induced sweet sorghum seeds,aggravated seedling root tip damage,sharply increased auxin content and inhibited root growth in arid environment.In conclusion,10µμmol/L and 25µμmol/L melatonin had the best effect,which can promote the synthesis of endogenous gibberellin and auxin by increasing starch hydrolysis,maintain strong osmosis,and enhance the drought stress resistance of sweet sorghum at germination stage.关键词
褪黑素/甜高粱/抗旱胁迫/萌发期/生理特性Key words
Melatonin/Sweet sorghum/Drought stress/Germination stage/Physiological characteristics分类
农业科技引用本文复制引用
王梦珂,王玉州,任尚福,王婷,张坤,李璐,方志刚..褪黑素引发甜高粱种子对萌发期抗旱胁迫生理特性的影响[J].江西农业学报,2025,37(4):62-68,7.基金项目
新疆维吾尔自治区自然科学基金面上项目(2022D01A232) （2022D01A232）
喀什大学高层次人才科研启动项目(022019032). （022019032）
