野生欧李果实发育期不同叶位叶片中主要矿质元素含量的变化

Variation of content of main mineral elements in the leaves at different leaf-position of Cerasus humilis during fruit development

以野生欧李为试材,研究了欧李果实发育期不同叶位成熟叶片中Ca与其他主要矿质元素的变化及其相关特性,为揭示欧李果实钙素吸收机制提供基础资料。结果表明,果实发育期新梢不同叶位叶片中Cu、Mn、Ca、Mg(均值)逐渐增加,Fe、Zn、K(均值)逐渐下降;果实成熟增长期新梢中不同部位叶片由下至上Cu、Zn、Mn、K呈增加趋势,Fe、Ca呈递减趋势,Mg无明显变化;不同叶位叶片中Ca变化相互间均呈显著或极显著正相关,与新梢上位叶片中Zn、Fe、K变化呈显著或极显著负相关,与新梢上位和下位叶片中Mn、Mg变化呈显著或极显著正相关。研究提出,新梢上位成熟叶片中主要矿质元素的变化可以表征新梢叶片中钙素吸收和累积的变化规律。

The content variations of 7 kinds of mineral elements in the adult leaves of different positions during fruit development were analyzed in Cerasus humilis. The results showed that the contents of Cu,Mn,Ca and Mg in different position leaves of the new shoot increased gradually,while the contents of Fe,Zn and K decreased gradually during the fruit development. From lower to upper position leaves,the contents of Cu,Zn,Mn and K increased during the fruit ripening period,while the contents of Fe and Ca decreased gradually,and the content of Mg had no obvious change. Significant positive correlation existed among the variation of Ca contents of different position leaves and between Ca contents and Mn and Mg contents of upper and lower position leaves,while negative correlation existed among the variation of Ca contents in upper-position leaves of the new shoots. It was suggested that the variation of mineral element contents of the upper-position adult leaves in new shoots could indicate the regular pattern of the variation of Ca absorption and accumulation in new shoot leaves.