نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشیار گروه زیست شناسی گیاهی، دانشکده علوم طبیعی، دانشگاه تبریز
2 دانشیارگروه خاکشناسی، دانشکده کشاورزی، دانشگاه تبریز
3 دانشجوی سابق کارشناسی ارشد فیزیولوژی گیاهی، دانشکده علوم طبیعی، دانشگاه تبریز
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Association between AM fungi and crop species is important because of effect on growth and uptake of mineral nutrients. Limited studies have been undertaken on this association in waterlogged species in general and rice in particular. In this work, the effect of inoculation with two species of AM fungi, namely, Glomus mosseae and Glomus intraradices on growth and phosphorus and potassium uptake was investigated in two cultivars of rice (Oryza sativa L.) cv. Tarom Hashemi and Fajr. In spite of a slight reduction in above-groung growth in colonized plants, root growth and phosphorus uptake were significantly stimulated. Interestingly, the positive response of growth and phosphorus uptake to colonization was observed only in Tarom Hashemi that had higher susceptibility to phosphorus deficiency and lacked induction of root growth under –P conditions. In another experiment using rhizobox technique, it was shown that AM colonization resulted in a significant increase of weight, length and branching of roots. It was also shown that, rhizosphere pH in inoculated and P-deficient plants was lowered up to 1.68 units, could have an important role in dissolving and increasing availability of nutrients such as phosphorus and zinc in soil grown plants. It was demonstrated that, the positive effect of mycorrhizal association on growth and uptake of nutrients depends highly on AM species, plant growth and nutritional status. The positive effect of inoculation is attributable to enhancement of root surface area and reduction of rhizosphere pH.
کلیدواژهها [English]
1. برزگر، ربابه. 1384 . بررسی تأثیر میکوریزی شدن بر روی رشد و تغذیه معدنی گیاه برنج. پایان نامه کارشناسی ارشد، دانشکده علوم طبیعی، دانشگاه تبریز.