苹果砧木铁高效基因型筛选

 以国内重要的11种苹果砧木为试材,研究了其对缺铁胁迫的适应性反应及其中9种砧木根系对铁的吸收特性,确定砧木对Fe的吸收动力学、根际酸化能力、根系还原能力作为评价铁高效苹果砧木的指标。筛选出Luo2、小金海棠、Luo为铁高效基因型苹果砧木;八棱海棠、茶果为中抗型砧木;珠眉海棠、黄海棠、青州花红、六蜜海棠、平邑甜茶、山定子为铁低效型砧木。

Screening of Fe-efficient Apple Rootstock Genotypes

The adaptability of rootstocks to iron deficiency was investigated with 11 important apple rootstocks,and Fe absorption rate and characteristics of absorption kinetics of 9 apple rootstocks were studied. The iron absorption kinetics parameters, rhizosphere acidification capacity and iron reduction capacity of root were initially selected as the indexes to evaluate Fe-sufficient apple genotypes. Cluster analysis of 11 apple rootstocks according to above-mentioned indexes revealed that Luo2, Luol, and M. xiaojinensis were highly chlorosis resistant; M. pruniforlia Borkh, and M. micromalus Makino were resistant; M. robusta, M. hupehensis Rehd, M. zumi Rehd, M. baccata Borkh were sensitive to chlorosis.