بررسی شناسایی و طبقه بندی قارچ های میکوریزی همزیست باباغ دراستان یزد

Holoxylon SP is a spicies plant growing in arid regions, specially in sand dune and it is an useful plant for fixing of sand dune. This plant has economical, social and environmental significance. Mycorrhizae is a natural symbiosis between roots of plants and mycelia of fungi, which assist .plants in- water and--nutrients - such -as -Nitrogen, phosphorus and potassium absorption. It increases the resistance of plants against pathogenesis and other stress factors, such as drought heavy metal poisoning and salinity. This symbiosis can be important for the plant in critical conditions for examlpe, water and nutrient factors deficiency also, environmental stress. Mycorrhizae of Haloxylon sp. was studied in natural and man-made forests in Yazd-Ardakan plain and Kavir-e-Daranjir of Yazd province. The effect of environmentaJ factors variation such as climate and soil on mycorrhizae was determined. The conclusion showed that H.aphyllumm and H.persicum living in symbiosis with VAM. Distribution and variation of mycorrhizae in natural forest was more than man-made forest. In this symbiosis spicies of Glomus, Gigaspora and Acaulospora in natural forest and spicies of Glomus in man-made forest make a contribution.