4种宿根花卉在自然失水胁迫下的生理变化与抗旱性关系  

Relationship between Physiological Changes and Drought Tolerance in Four Perennial Root Flower Plants under Drought Stress

作　　者：李涛[1] 王飞[1] 卢艳[1] 王虹[1] 

机构地区：[1]西北农林科技大学园艺学院,陕西杨凌712100

出　　处：《西北农业学报》2010年第10期146-151,共6页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：中国科学院知识创新项目(黄土高原快速绿化与植被恢复kzcxz-xb1-06)

摘　　要：对陕西关中地区常见的4种宿根花卉的抗旱性进行了研究,为园林绿化中耐旱植物资源筛选和园林应用提供理论和实践依据。通过盆栽4种宿根花卉,对其进行连续21 d的自然失水胁迫处理,研究供试植物在干旱胁迫下的植株外观生长状况以及叶片的游离脯氨酸、叶绿素、相对含水量、相对电导率、可溶性蛋白质以及SOD活性的变化,并应用模糊数学中的隶属函数值法对4种宿根花卉的综合抗旱适应性进行评价。在干旱胁迫下各参试植物的各指标变化显著,综合分析各指标,4种宿根花卉抗旱性由强至弱排序为:短茎鸢尾>紫玉簪>金娃娃萱草>秋菊贵妃红。短茎鸢尾、紫玉簪、金娃娃萱草具有很强的抗旱性,在园林绿化中应大力推广应用。Study on the drought tolerance of four perennial root flower plants which grown in Guanzhong district of Shaanxi province,aims to provide the theoretical and practical references for selecting and applying of the drought-tolerance landscape plants resources in landscape planning and management.Physiological indices in leaves of these flower plants were continuously observed for 21 days by pot experiment under artificial water stress conditions,and changes of the plant appearance,proline content,chlorophyll,relative water content,relative electrolyte leakage and soluble protein content as well as SOD activity were measured and a comparison of the subordinate function values of each plants was used to decide the drought-resistance order of each perennial root flower plants.The physiological indices of each plants changed significantly,the drought-resistance order of the four perennial root flower plants was that I.brevicaulis H.ventricosa H.fulva Stella deoraDendranthema morifolium Guifeihong.I.brevicaulis,H.ventricosa,and H.fulva Stella deora are well-drought-resistance root flower plants,which should be widely used in landscape planning and management.

关 键 词：宿根花卉 抗旱性 水分胁迫 叶片生理指标 隶属函数值 

分 类 号：S682.1[农业科学—观赏园艺]