华北农学报2023，Vol.38Issue(6)：55-61,7.DOI:10.7668/hbnxb.20194143
锰处理下棉花幼苗根部对镉胁迫的生理响应
Physiological Response of Two Cotton Seedlings to Cadmium Stress Treated with Different Concentrations of Manganese
摘要
Abstract
To investigate the effects of Mn treatment on the growth,development and cadmium adsorption ca-pacity of cotton under Cd stress.Different concentrations of Mn treatment(0,5,10,50 μmol/L)were applied to ex-ploit changes of superoxide dismutase(SOD),catalase(CAT),malondialdehyde(MDA),free proline(Pro),Cd con-tent,dry matter quality,and main root length of roots of cotton seedlings of Xiang C178 and Xiang FZ001 under Cd stress.The stress of 10 μmol/L Cd had a significant effect on the growth of cotton root.The physical barrier and an-tioxidant defense mechanism were constructed to reduce the damage of Cd to root cells,resulting in a decrease in SOD activity and an increase in CAT activity,MDA content and Pro content.And,adding Mn was observed to effect the physiological response to cadmium of cotton seedling roots.Low concentration of Mn treatment resulted in the decrease of Cd content,the increase in SOD activity and Pro content,the decrease in CAT activity and MDA content in the root of cotton seedlings,which effectively prevented the inhibition of Cd stress on the root growth of cotton seedlings.High concentrations of Mn could increase Cd content and SOD activity in cotton seedling roots,which af-fected the root growth of cotton seedlings.When using cotton to repair Cd-contaminated farmland,it can be less than 10 μmol/L Mn ion treatment is used to improve the Cd tolerance of cotton seedlings and ensure the normal growth of cotton plants.关键词
棉花幼苗/锰处理/镉胁迫/根部/生长Key words
Cotton seedlings/Manganese treatment/Cadmium stress/Roots/Growth分类
农业科技引用本文复制引用
肖才升,匡政成,谢心,李锋,郭利双,贺璐,陈浩东,李飞,匡逢春,赵燕..锰处理下棉花幼苗根部对镉胁迫的生理响应[J].华北农学报,2023,38(6):55-61,7.基金项目
国家重点研发计划(2021YFE0101200) （2021YFE0101200）
棉花生物育种与综合利用全国重点实验室(CB2023A10) （CB2023A10）
棉花种质资源利用与分子设计育种山西省重点实验室开放基金(MHKF202102) （MHKF202102）
