نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد زراعت دانشگاه محقق اردبیلی
2 دانشیار دانشکده کشاورزی دانشگاه محقق اردبیلی
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In order to investigate the influence of soil salinity and seed inoculation with plant growth promoting rhizobacteria (PGPR) on sodium and potassium, stomatal conductance and yield of wheat (Triticum aestivum L.), a factorial experiment based on randomized complete block design with three replications was conducted under greenhouse conditions at the University of Mohaghegh Ardabili in 2012. Experimental factors included four levels of soil salinity (0, l, 15, 30 and 60 Mm Nacl) and four levels of seed inoculation with PGPR (no inoculation as control, inoculations with Azotobacter chroococum strain 5, Azosperilium lipoferum strain OF or Pseudomonas putida strain 186). The results showed that the quality and quantity , stomatal conductance, sodium and potassium contents of root and shoot were significantly affected by soil salinity and seed inoculation with PGPR. Means comparison showed that under salinity conditions, grain yield per plant, number of seed per spike, 100 grains weight, spike length and root weight increased due to seed inoculation with PGPR. I Increasing in soil salinity raised Na+/K+ ratio in root and shoots while seed inoculation with PGPR decreased the ratio. Maximum of Na+/K+ was obtained at the highest level of salinity with no inoculation with PGPR. The minimum ratio was recorded in the treatments their seed inoculated t with Azospirillum with the least level of salinity. Thus in order to , decrease Na+/K+ in root and shoots, maintain high stomatal conductance and ultimately achieve high quality and quantity of wheat yield, seed inoculation with Azospirillum seems promising.
کلیدواژهها [English]