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温室条件下,用NaCl和Na2SO4处理石头扁桃和桃扁桃,处理浓度分别是:150,300,350 mmol/L,处理10 d后测定无机离子含量,并观察叶绿体超微结构的变化。研究发现:①NaCl胁迫下,两个供试材料叶片中Na+,Cl-含量及Na+/K+均随盐浓度的增加而增加,K+含量随盐浓度增加下降,石头扁桃叶片中无机离子含量变化幅度大于桃扁桃;Na2SO4胁迫下,石头扁桃叶片中Na+,SO42-,K+含量及Na+/K+的变化规律与NaCl胁迫下一致,桃扁桃K+含量随盐浓度增加而增加,Na+/K+在盐胁迫下却升高。②盐胁迫后,叶绿体基粒、基质片层扭曲,类囊体肿胀;随盐浓度的增加,形变加剧,叶绿体由椭圆形肿胀成圆形,叶绿体膜解体,石头扁桃叶绿体对盐胁迫比较敏感。综合分析发现,两种盐对植物造成伤害的机理不同,石头扁桃的耐盐能力差。
Under greenhouse conditions, the almonds and peach trees were treated with NaCl and Na2SO4 at concentrations of 150, 300 and 350 mmol / L, respectively. The content of inorganic ions was measured after 10 days of treatment, and the changes of chloroplast ultrastructure were observed. The results showed that: ①NaCl stress, Na +, Cl- content and Na + / K + content of leaves of two tested materials increased with the increase of salt concentration, K + content decreased with the increase of salt concentration, the content of inorganic ions in stone almond leaves was more than Under the Na2SO4 stress, the content of Na +, SO42-, K + and Na + / K + in the leaves of Almond were the same with those under NaCl stress. K + content of Almond increased with the increase of salt concentration, but Na + / K + Rise. ② Salt stress resulted in the distortion of chloroplast matrix and matrix and the swelling of thylakoid. With the increase of salt concentration, the deformation was aggravated. The chloroplast swollen from ellipse to a circle, the chloroplast membrane disintegrated and the chloroplast of stone almond was more sensitive to salt stress. The comprehensive analysis shows that the mechanism of the damage caused by the two kinds of salts to plants is different, and the salt tolerance of stone almonds is poor.