高级检索

    干旱胁迫对乌头部分生理指标的影响

    Impacts of drought stress on physiological characteristics of Aconitums

    • 摘要: 运用模糊隶属法,以北乌头、高乌头、山西乌头、牛扁和华北乌头的移栽苗为试材,研究中度(T1)和严重(T2)干旱胁迫对乌头生理特性的影响,为抗旱性植物的选取提供方法和依据。结果表明:1)细胞膜透性:北乌头在T1和T2处理下分别显著低于和高于对照(CK),高乌头和华北乌头在T2处理下才显著增高,而山西乌头和牛扁在T1和T2处理下都显著增高; 2)丙二醛质量分数:高乌头、牛扁、华北乌头在T1、T2处理下均显著升高,山西乌头只在T2处理下显著升高,北乌头则在T1处理下显著升高; 3)叶绿素质量分数:在干旱胁迫下除牛扁的叶绿素a质量分数上升外,其余乌头均显著低于对照,而干旱胁迫下5种乌头的叶绿素b质量分数增减差异较大;4)净光合速率:北乌头和高乌头在T1和T2处理下均显著下降,但T1、T2处理间无显著差异,山西乌头只有在T2处理下显著降低,牛扁在干旱处理下反而上升,华北乌头无显著反应;5)根据抗旱隶属值,5种乌头的抗旱性由大到小的顺序为北乌头、高乌头、山西乌头、华北乌头、牛扁。

       

      Abstract: Using fuzzy membership method, transplanted seedlings of five AconitumsAcotinitum kusnezoffii Reichb., A. sinomontanum Nakai,A. smithii Hand.-Mazz.,A. barbatum Pers. var. puberulum Ledeb,A. soongaricum Stapf var. angustius W.T.Wang)were selected to study the effects of drought stress on their physiological characteristics,aiming at providing a method and basis for selection of draught-resistance plants. Three soil moisture levels were designed in the experiment: control(CK),moderate water stress(T1),and severe water stress (T2). The results showed: 1) The cell membrane permeability of A. sinomontanum and A. soongaricum var. angustius clearly increased only under T2,while that of A. smithii and A. barbatum var. puberulum greatly increased under both T1 and T2 treatments. The cell membrane permeability of A. kusnezoffii significantly decreased under T1 but increased under T2. 2) The MDA contents of A. sinomontanum, A. barbatum var. puberulum and A. soongaricum var. angustius were all greatly increased under the drought stress treatments,while that of A. smithii and A. kusnezoffii increased obviously only under T2 and T1 respectively. 3) The Chla contents of the Aconitums,except for A. barbatum var. puberulum,were significantly lower than that of CK. The Chlb contents of the five Aconitums varied greatly under the draught stress treatments. 4) The Pn of both A. kusnezoffii and A. sinomontanum largely decreased under T1 and T2 treatments,but there was no significant difference between those two treatments. The Pn of A. smithii decreased grealty only under T2,whereas that of A. barbatum var. puberulum increased by T1 and T2 treatments. The Pn of A. soongaricum Stapf var. angustius had no significant change under the treatments. (5) The drought tolerant ability of the five Aconitum species was determined according to the subordinate function value as: A. kusnezoffii>A. sinomontanum>A. smithii>A. soongaricum Stapf var. angustius>A. barbatum var. puberulum.

       

    /

    返回文章
    返回