PEG模拟干旱胁迫条件下纳米氧化锌对玉米幼苗生长及生理特性的影响  

The Effect of Nano-Zinc Oxide on Maize Seedlings Growth and Physiological Characteristics under the Drought Stress Simulation of PEG

作　　者：王玉艳 程浩 汪根秀 黄伟东 高家辉 张小娟 WANG Yuyan;CHENG Hao;WANG Genxiu;HUANG Weidong;GAO Jiahui;ZHANG Xiaojuan(Anhui Science and Technology University,Chuzhou 233100,China)

机构地区：[1]安徽科技学院资源与环境学院,安徽滁州233100 [2]安徽科技学院农学院,安徽滁州233100

出　　处：《金陵科技学院学报》2025年第1期86-92,共7页Journal of Jinling Institute of Technology

基　　金：安徽省功能农业与功能食品重点实验室(安徽科技学院)开放课题(iFAST-2024-3);安徽省财政农业科技成果转化项目(2024ZH017);安徽省大学生创新创业项目(S202410879152)。

摘　　要：以15%(m/V)PEG模拟干旱胁迫,从形态学、生理生化等层面分析了不同浓度(100、300、500、1000 mg·L^(-1))纳米氧化锌对玉米(安科985)幼苗的影响。结果表明:不同浓度纳米氧化锌均能明显缓解干旱胁迫下玉米幼苗的萎蔫度,促进玉米幼苗茎叶及根部生长,其中以500 mg·L^(-1)纳米氧化锌效果最为明显。此外,500 mg·L^(-1)纳米氧化锌显著降低了玉米幼苗叶绿素含量,显著提高了叶片内的SOD、POD、CAT酶活性,降低了超氧阴离子的含量,使得玉米幼苗在干旱胁迫中受到的伤害得到有效缓解,增强了抗逆能力,对提高玉米在苗期的抗旱性能、减轻干旱胁迫危害具有一定的参考价值。The effects of nano-zinc oxide at different concentrations(100,300,500,1000 mg·L^(-1))on maize(Anke985)seedlings were analyzed under the simulated drought stress of 15%(m/V)PEG from morphological,physiological and biochemical perspectives.The results showed that different concentrations of the nano-zinc oxide could obviously alleviate the wilting degree of maize seedlings under drought stress and promote the growth of stems,leaves and roots of maize seedlings,among which 500 mg·L^(-1) nano-zinc oxide had the most significant effect.In addition,500 mg·L^(-1) nano-zinc oxide had significantly reduced the chlorophyll content in maize seedlings,and obviously increased the enzymatic activities of SOD,POD and CAT in the leaves of maize seedlings,and enormously reduced the content of superoxide anion,which effectively alleviated the damage of drought stress to maize seedlings and enhanced their stress resistance.The study has certain reference value for improving the drought resistance of maize seedlings and reducing the harm of drought stress.

关 键 词：纳米氧化锌 玉米幼苗 干旱胁迫 PEG 生长 

分 类 号：S311[农业科学—作物栽培与耕作技术]