AM真菌对沙田柚组培苗炼苗期水分生理及生长效应的研究

对沙田柚组培苗移栽时接种AM真菌,从试验当天起定期采样对根系的AM真菌侵染情况和叶片的相对水分含量、光合参数、叶绿素含量、ABA含量、脯氨酸含量及植株茎和根系的N、P、K含量等进行测定.结果表明:1)AM真菌侵染沙田柚组培苗根系过程非常迅速;2)接种AM真菌有利于提高沙田柚组培苗植株叶片叶绿素含量,增强光合产物的生产能力;有利于提高植株叶片的蒸腾速率和气孔导度,显著降低叶片ABA含量增加的速度,减轻植株受水分胁迫的程度;有利于植株更有效地吸收水分,显著提高叶片相对水分含量,促进幼苗的生长,提高幼苗的抗旱能力;3)接种AM真菌有利于沙田柚对N、P的积累,其中又以P含量的提高尤为明显;促进组培苗的生长发育,使植株的鲜重显著增加,茎鲜重增加尤为显著.研究认为接种AM真菌的方法简单易行,有助于沙田柚度过干旱期而提高种植沙田柚的经济效益,可在重庆市大面积推广使用.

Influences of AM Fungi on Growth and Water Ecophysiology of Grouped Shatian Pomelo During Cultivating and Training Periods

Young plants of Shatian pomelo shaddock are inoculated with arbuscular mycorrhizal fungi during transplantation. From the commencement of the experiment, the condition of the arbuscular mycorrhizal fungi in the root-system, the comparative water content of the leaf blade, the parameters of the photosynthesis, the content of the chlorophyll, ABA, praline and the N, P, K content of stem and roots are sampled periodically. The results show that the course of AM fungi infection is very fast and inoculating arbu...