喷施炭吸附聚谷氨酸对干旱胁迫下玉米幼苗生长的缓解效应  

Alleviating Effect of Spraying Carbon‑Adsorbed Polyglutamic Acid on Growth of Maize Seedling under Drought Stress

作　　者：党永富 曹丽茹[2] 鲁晓民[2] 党尊 邱天 段恩忠 邱军政 田云峰[3] DANG Yongfu;CAO Liru;LU Xiaomin;DANG Zun;QIU Tian;DUAN Enzhong;QIU Junzheng;TIAN Yunfeng(Henan Yuandong Biotechnology Limited Company,Zhoukou 466000,China;Cereal Crops Institute,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China;Scientific Research Management Division,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China)

机构地区：[1]河南远东生物工程有限公司,河南周口466000 [2]河南省农业科学院粮食作物研究所,河南郑州450002 [3]河南省农业科学院科研管理处,河南郑州450002

出　　处：《河南农业科学》2021年第8期26-35,共10页Journal of Henan Agricultural Sciences

基　　金：中国博士后科学基金项目(2020M682299)。

摘　　要：以郑单958、郑单6122和郑单819为试验材料,在玉米苗期干旱胁迫后分别喷施清水和炭吸附聚谷氨酸,研究炭吸附聚谷氨酸对干旱胁迫下玉米幼苗形态、生理生化方面的影响,以期为玉米抗旱高产栽培提供新方法。结果显示,喷施炭吸附聚谷氨酸总体显著提高了干旱胁迫下玉米根长、根表面积、根体积、株高、叶面积、地上和地下部干质量及根冠比,显著提高了叶片的相对含水量、叶绿素含量、Fv/Fm、可溶性蛋白含量及超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性。主成分分析显示,叶片相对含水量、叶绿素含量和可溶性蛋白含量是喷施炭吸附聚谷氨酸缓解干旱胁迫对玉米造成伤害的关键指标。灰色关联分析显示,叶绿素含量、根冠比、Fv/Fm、POD和SOD活性均与总干质量有较高的关联系数,分别为0.5664、0.4549、0.4491、0.4299和0.4182。综上所述,炭吸附聚谷氨酸增强了玉米苗期对干旱胁迫的耐受性,可作为干旱胁迫的缓解剂。Zhengdan 958,Zhengdan 6122 and Zhengdan 819 were used as test materials,after drought stress,water and carbon‑adsorbed polyglutamic acid were sprayed on maize seedlings respectively,and the effects of carbon‑adsorbed polyglutamic acid on the morphology,physiology and biochemistry of maize seedlings under drought stress were studied.The results showed that the root length,root surface area,root volume,plant height,leaf area,dry aboveground weight,dry underground weight and root‑shoot ratio of maize seedlings under drought stress overall significantly increased after sprayed with carbon‑adsorbed polyglutamic acid;the relative water content(RWC),chlorophyll content,Fv/Fm,soluble protein content,activities of superoxide dismutase(SOD),peroxidase(POD)and catalase(CAT)of maize leaves significantly increased after sprayed with carbon‑adsorbed polyglutamic acid.Principal component analysis showed that RWC,chlorophyll content and soluble protein content of maize leaves were the key indexes in alleviating the damage caused by drought stress to maize after spraying carbon‑adsorbed polyglutamic acid.Grey correlation analysis showed that the chlorophyll content,root‑shoot ratio,Fv/Fm,POD and SOD activities all had higher correlation coefficients with the total dry weight,which were 0.5664,0.4549,0.4491,0.4299 and 0.4182,respectively.The results showed that carbon‑adsorbed polyglutamic acid enhanced the tolerance of maize to drought stress at seedling stage,and could be used as drought stress reliever.

关 键 词：炭吸附聚谷氨酸 玉米 苗期 干旱 缓解剂 

分 类 号：S513[农业科学—作物学]