干旱胁迫对彩菊切花幼苗根系构型和生理活性的影响  

Effects of Drought Stress on the Root Architecture and Physiological Activity of Cut Chrysanthemum Seedlings

作　　者：杨小英[1,2] 黄艳竹 郝春磊 慕波 严瑞 张黎 YANG Xiaoying;HUANG Yanzhu;HAO Chunlei;MU Bo;YAN Rui;ZHANG Li(College of Civil Architecture,Yinchuan University of Energy,Yinchuan,Ningxia 750100;College of Agriculture,Ningxia University,Yinchuan,Ningxia 750021;Ningxia Shengxu Hao Chun Agricultural Technology Co.Ltd.,Yinchuan,Ningxia 750001;Ningxia Qian Yi Agricultural Technology Co.Ltd.,Yinchuan,Ningxia 750001)

机构地区：[1]银川能源学院土木建筑学院,宁夏银川750100 [2]宁夏大学葡萄酒与园艺学院,宁夏银川750021 [3]宁夏盛旭昊春农业科技有限公司,宁夏银川750001 [4]宁夏芊艺农业科技有限公司,宁夏银川750001

出　　处：《北方园艺》2024年第2期47-54,共8页Northern Horticulture

基　　金：宁夏回族自治区第二批高校黄大年式教师团队:土木工程教师团队资助项目(宁教师[2022]130号);宁夏回族自治区重点研发资助项目(2022BBF03035);银川能源学院科研创新团队:绿色工程材料高效利用研究创新团队资助项目(银能院[2022]233号)。

摘　　要：以6个品种彩菊切花幼苗为试材,通过盆栽和人工浇灌20 mmol·L^(-1)浓度PEG 6000模拟干旱胁迫处理,探究彩菊切花在干旱胁迫第5、10、15、20天时根系构型和生理指标变化,选出抗旱性强、适应宁夏地区大面积推广与种植的优良彩菊切花品种,以期为西部干旱地区菊花品种的推广提供参考依据。结果表明:随着干旱胁迫的持续,彩菊切花的根系总长度、根系总表面积、根系总体积与总根系指标的关联程度较大。除根系总体积外,根系平均直径与其他根系指标不存在相关性。与正常浇水相比,不同品种彩菊切花的叶片相对含水量和叶绿素含量不断下降,相对电导率和可溶性蛋白质含量升高,丙二醛和可溶性糖含量先上升后下降,过氧化物酶活性呈先下降后上升趋势,超氧化物歧化酶活性呈先上升再下降最后上升的趋势。Taking six varieties of cut Chrysanthemum seedlings as experimental materials,through pot cultivation and artificial watering with a 20 mmol·L^(-1) concentration of PEG 6000,simulating drought stress,the changes in root system architecture and physiological indicators of cut Chrysanthemum were investigated on the 5^(th),10^(th),15^(th),and 20^(th) days of drought stress.The aim was to identify excellent cut Chrysanthemum varieties with strong drought resistance and suitable for large-scale promotion and cultivation in the arid region of Ningxia,in order to provide reference for the promotion of Chrysanthemum varieties in western arid areas.The results showed that as drought stress continued,the total length,surface area and volume of the root systems of cut Chrysanthemumwere significantly correlated with the total index.There was no correlation between average root diameter and other root indexes except total volume.Compared with water,the relative water content and chlorophyll of the Chrysanthemum leaves of different varieties continuously decreased,while the relative conductivity and soluble protein content increased.The content of malondialdehyde and soluble sugars first increased and then decreased,and the activity of peroxidase first decreased,then increased.The activity of superoxide dismutase showed an initial increase,then a decrease,and finally an increase.

关 键 词：彩菊切花 干旱胁迫 根系构型 生理活性 

分 类 号：S682.11[农业科学—观赏园艺]