نوع مقاله : مقاله پژوهشی
نویسندگان
گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه محقق اردبیل
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Water deficit is one of the most important environmental stresses that adversely affect crop growth and production. Mycorrhizal fungi and symbiotic bacteria have important role in resistance to drought stress. A factorial experiment based on randomized complete block design was conducted with three replications in greenhouse, University of Mohaghegh Ardabil in 2013. Treatments were water stress at three levels ( 35%, 55% and 75% field capacity) and four seed inoculation as mycorrhiza (Glomus mosseae), Rhizobium (Sinorhizobium meliloti), mixed Inoculation (Glomus mosseae + Sinorhizobium meliloti) and non-inoculated as control. The results showed that in severe stress, amount of proline, soluble sugars and water use efficiency increased (2.65 µmol/g FW, 2.21 mg/g FW, 1.1 g/kg, respectively) as compared to control. While the concentration of nitrogen, quantum yield, protein, osmotic potential and relative water content (0.57 %, 0.16, 0.8 mg/g.fwt, 27.81 % and - 0.6 bar) decreased, respectively. In between treatments including maximum and minimum amounts averages , soluble protein (5.17, 2.56 mg/g FW), soluble sugars (4.61, 3.55 mg/g FW) proline (5.8, 2.83 µmol/g FW), relative water content (81.61, 70.12(%, concentration of nitrogen (3.81, 2.66(% water use efficiency (0.86, 0.25 g/kg), respectively, were belonged to mixed inoculation and control. While the lowest amount of osmotic potential (-1.41 bar) related to mixed inoculation, and the most amount (-1.06 bar) to control. Quantum yield did not show significant difference in between the Inoculated treatments.
کلیدواژهها [English]
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