水土保持学报2018，Vol.32Issue(1)：280-285,6.DOI:10.13870/j.cnki.stbcxb.2018.01.044
大叶榉‘恨天高’对干旱胁迫的生理响应及抗旱性评价
Physiological Responses of Zelkova schneideriana'Hentiangao'to Different Drought Stresses During Seedling Stage and Its Evaluation of Drought Resistance
摘要
Abstract
To examine the physiological responses of Z.schneideriana seedlings to drought stress and to screen out the physiological indexes of drought resistance,a pot water control test was conducted.The drought resistance was also evaluated based on the membership function values.Two materials (Z.schneiderana'Hentiangao'and common Z.schneideriana grafted seedlings) were studied under three water conditions:light drought (LD),moderate drought (MD) and severe drought (SD).The results showed that with the increase of drought stress,the contents of the relative electric conductivity (Rec),malondialdehyde (MDA),water saturation deficit (WSD) and free proline (Pro) of the two testing materials were increased.And their peroxidase (POD) activity,superoxide dismutase (SOD) activity and chlorophyll (Chl) contents also changed with the increasing drought stress,as a'parabola'trend.The SS contents increased with the increase of drought stress for Z.schneideriana'Hentiangao',but increased first and then decreased for Z.schneiderian.Principal component analysis based on 8 drought stress indexes hinted that Rec,MDA,WSD,Pro and POD had the close relationships with the drought resistance of Z.schneideriana,and could be used to evaluate its drought resistance.The calculated membership function values of the 8 physiological indexes and the comprehensive index from the principal component analysis indicted that the drought resistance of 'Hentiangao'(0.58) is stronger than the common Z.schneideriana's (0.56).Considering the drought resistance of'Hentiangao'is match with oriental arborvitae,it can meet the application requirements of urban landscape and highway greening from the point of drought resistance.关键词
大叶榉/干旱胁迫/水分饱和亏/生理指标Key words
Zelkova schneideriana'Hentiangao'/drought stress/water saturation deficit/physiological index分类
农业科技引用本文复制引用
曾艳,金晓玲,张亚平,刘晓玲,罗峰,胡曼筠..大叶榉‘恨天高’对干旱胁迫的生理响应及抗旱性评价[J].水土保持学报,2018,32(1):280-285,6.基金项目
中央财政林业科技推广项目([2015]XT008) （[2015]XT008）
国家林业局重点学科资助项目(林人发[2016]21号) （林人发[2016]21号）
湖南省“十二五”重点学科(风景园林学)(湘教发[2011]76号) （风景园林学）
国家林业局“十三五”重点学科项目([2015]44号) （[2015]44号）
湖南省科技计划项目(2016TP2007) （2016TP2007）
