论文部分内容阅读
以2年生盆栽富士苹果树(砧木为平邑甜茶)为试材,研究了NaCl胁迫对其叶片膜透性、脯氨酸及矿质营养含量的影响,结果表明:0.3%盐胁迫处理的电导率在中前期高于对照,1%盐处理中期高于对照;盐胁迫后半期0.3%NaCl处理的脯氨酸含量高于对照。NaCl胁迫下,苹果体内各器官Na+含量大小的顺序是:根>新梢>主干韧皮部>叶>主干木质部,在0.1%NaCl胁迫下,新梢和叶片中的Na+没有明显变化,根、主干韧皮部和主干木质部含量明显提高,在0.3%NaCl胁迫下各器官中Na+含量明显提高,地上部叶片、主干韧皮部和新梢中Na+含量提高幅度最大。NaCl胁迫对各器官的N、P、K+含量没有明显影响,但胁迫下N/Na+、P/Na+和K+/Na+比值不同程度的降低,从而使树体内的元素平衡受到破坏,导致树体受害。N、K+含量在叶片中含量最高,P在新梢中含量最高,N、P、K+在主干木质部中含量均最低。
The effects of NaCl stress on leaf membrane permeability, proline and mineral nutrition of potted Fuji apple tree (rootstock of Pingyi sweet tea) were studied. The results showed that the conductivity of 0.3% salt stress treatment The content of proline in 0.3% NaCl treatment was higher than that of the control in the middle and early stages of salt treatment. Under NaCl stress, the order of Na + content in different organs of apple was: root> shoot> trunk phloem> leaf> stem xylem. Under 0.1% NaCl stress, there was no significant change in Na + in shoot and leaf. Roots and trunk phloem And the content of xylem in trunk increased obviously. The content of Na + in each organ increased obviously under 0.3% NaCl stress, and the content of Na + in leaf aboveground part, trunk phloem and shoot increased the most. NaCl stress had no significant effect on the content of N, P and K + in various organs, but the ratio of N / Na +, P / Na + and K + / Na + decreased to some extent under the stress so that the balance of elements in the tree was destroyed, . The contents of N and K + were the highest in leaves, P was the highest in shoots and N, P and K + were the lowest in main xylem.