干旱胁迫对桃叶杜鹃菌根苗叶肉细胞超微结构的影响

为了探明ERM真菌在干旱胁迫时对桃叶杜鹃叶肉细胞超微结构的影响,在温室大棚内,采用盆栽控水法对分别接种两种ERM真菌(TY29、TY35)的桃叶杜鹃1年生幼苗进行干旱胁迫处理,以不接种真菌的为对照,在透射电镜下观测不同水分处理下接菌苗与对照苗叶肉细胞超微结构的变化。结果表明:在正常水分条件下,各处理桃叶杜鹃幼苗的叶肉细胞结构相同,细胞完整。随着干旱程度的加深,各处理细胞的叶绿体和线粒体的受损程度都逐渐增大,但在相同水分胁迫下,接种ERM菌根真菌的桃叶杜鹃幼苗的线粒体和叶绿体等细胞器的完整程度要高于对照,细胞器受损害程度更小,具有较好的抗旱能力,其中接种TY35对桃叶杜鹃叶肉细胞的作用更明显。

Effects of Ericoid Mycorrhiza Fungi on Rhododendron annae Seedlings Leaf Ultrastructure under Drought Stress

An experiment was conducted to study the effects of Ericoid Mycorrhiza Fungi on leaf ultrastructure of 1-a seedlings of Rhododendron annae under water stress by soil culture experiment.Under drought stress in the greenhouse, the effects on root cells ultrastructures of R.annae mycorrhizal seedlings were studied.Under normal water condition, the ultrastructure of mesophyll cells was complete.All cell chloroplasts and mitochondria damage were increased gradually, but under the same water stress, inoculated seedlings of cell organelles such as mitochondria and chloroplasts were more stable than con-trol, and TY35 was more apparent in the role of the mesophylls.