Influence of Soil Salinity and Seed Inoculation with Plant Growth Promoting Rhizobacteria (PGPR) on Sodium and Potassium Contents, Stomatal Conductance and Yield of wheat (Triticum aestivum L.)

Document Type : Research Paper

Authors

1 MSc. Student, University of Mohaghegh Ardabili

2 Associate Professor, Faculty of Agriculture, University of Mohaghegh Ardabili

10.22092/sbj.2014.128411

Abstract

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.
 

Keywords

References

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Journal of Sol Biology
Volume 1, Issue 2
February 2014
Pages 107-122

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