CAJ | 학술논문

在土壤相对含水量为75％、55％、40％和25％的盆栽条件下，研究了二倍体毛泡桐（T 2）、二倍体豫杂一号泡桐（TF2）、四倍体毛泡桐（T4）、四倍体豫杂一号泡桐（TF4）对干旱胁迫的生理响应。结果表明，随着干旱胁迫的增强，四倍体泡桐与其二倍体泡桐的生理生化指标变化趋势一致，叶片相对含水量和叶绿素含量呈下降趋势，四倍体泡桐的叶片相对含水量和叶绿素含量均高于其二倍体；相对电导率和丙二醛（MDA）含量呈上升趋势，四倍体泡桐小于其二倍体；超氧化物歧化酶（SOD）活性、叶片可溶性蛋白质含量呈先升高后降低趋势；可溶性糖含量和脯氨酸含量均呈升高趋势，四倍体泡桐高于其二倍体。对25％干旱胁迫下泡桐的各项生理指标利用模糊隶属函数法综合分析，抗旱性大小顺序为T 4＞ T F4＞T 2＞T F2。
재토양상대함수량위75％、55％、40％화25％적분재조건하，연구료이배체모포동（T 2）、이배체예잡일호포동（TF2）、사배체모포동（T4）、사배체예잡일호포동（TF4）대간한협박적생리향응。결과표명，수착간한협박적증강，사배체포동여기이배체포동적생리생화지표변화추세일치，협편상대함수량화협록소함량정하강추세，사배체포동적협편상대함수량화협록소함량균고우기이배체；상대전도솔화병이철（MDA）함량정상승추세，사배체포동소우기이배체；초양화물기화매（SOD）활성、협편가용성단백질함량정선승고후강저추세；가용성당함량화포안산함량균정승고추세，사배체포동고우기이배체。대25％간한협박하포동적각항생리지표이용모호대속함수법종합분석，항한성대소순서위T 4＞ T F4＞T 2＞T F2。
With relative soil water contents of 75% ,55% ,40% and 25% ,the physiological re-sponse of diploid Paulow nia tomentosa(T2) ,diploid Paulow nia tomentosa × Paulow nia f ortunei (TF2) and their tetraploid Paulownia(T4 ,TF4) plants to drought stress were studied .The result showed that the changing trend of leaf physiological and biochemical indexes was consistent be-tween the tetraploids and their dipoid Paulownia plants with aggravation of drought stress .The water and chlorophyll contents of the leaves went down with aggravation of drought stress ,and the water and chlorophyll contents of the tetraploid Paulownia plants leaves were higher than those of the diploids .The relative conductivity and content of MDA increased with aggravation of drought stress ,with the tetraploid Paulownia plants less than the diploid .The SOD activity and soluble protein content increased firstly and decreased afterwards .The contents of soluble sugar and proline increased with aggravation of drought stress ,and the tetraploids were higher than its diploid .Based on the leaf physiological indexes in the soil with 25% relative soil water content by a comprehensive analysis of fuzzy membership functions ,the order of drought stress tolerance of the Paulownia plants was T4> TF4> T2> TF2 .