内蒙古荒漠地区丛枝菌根植物的初步研究

本文对内蒙古荒漠建群及优势植物的丛枝菌根共生状况进行了调查。在观察的16科76种植物中,被丛枝菌根真菌侵染的植物有61(占79. 8% )种;其中多年生草本植物被丛枝菌根真菌侵染的比例较高,占94. 46%;而一年生和二年生的草本植物的比例仅65%。须根系植物中菌根植物约占91. 3%,高于直根系(75. 5% )。古地中海孑遗种四合木(Tetraenamongolica)、棉刺(Potaniniamongolica)、沙冬青(Ammopiptanthusmongolicus)和强旱生植物半日花(Helianthemumsoongoricum)有一定的菌根侵染。本地区野生植物的丛枝菌根形态结构类型多数为Arum类型,占83. 6%;而Paris类型少,只占3. 3%。丛枝菌根结构类型与植物的生活型、根系类型和侵染率无关。

Preliminary Study on Arbuscular Mycorrhizaes and Their Morphological Types of Common Plants in Inner Mongolia Desert Region

We collected and studied 76 plant species from desert of Inner Mongolia. Of them, 61 species (79.8%) were infected by arbuscular mycorrhizal fungi (AMF). The colonization rate of AM fungi was higher in the perennial species (94.46%) than in the annual and biennialplants (65%). Most wild plant species surveyed belonged to Arum-type (83.6%), whereas only 3.3% plants belonged to Paris-type. The intermediate type and un-determined type plants were 6.6% and 3.3% respectively. The ancient plant species (Tetraena mongolica,Potaninia mongolicaand Ammopiptanthus mongolicus) were infected by AMF and formed the Arum-type. The morphology of the AM associations in the desert plants shows no relation to the root types, life forms and colonization rates of their host plants.