Effect of Plant Growth Promoting Rhizobacteria (PGPRs) on yield and yield components of Black cumin under drought stress conditions in Shahr-e-Rey region
Subject Areas : Crop Production Researchmohamad amin akbari 1 , alireza pazoki 2
1 - دانشآموخته کارشناسی ارشد، گروه زراعت، واحد یادگار امام خمینی )ره( شهرری، دانشگاه آزاد اسلامی، تهران، ایران
2 - دانشیار، گروه زراعت، واحد یادگار امام خمینی )ره( شهرری، دانشگاه آزاد اسلامی، تهران، ایران
Keywords: Yield, Stress, Medicinal Plants, Plant Growth Promoting Rhizobacteria (PGPRs),
Abstract :
In order to study the effect of Plant Growth Promoting Rhizobacteria (PGPR) on yield andyield components of Black cumin (Nigella sativa L.) under drought stress conditions inShahr-e-Rey region, an experiment was done as split plot based on completely randomizedblock design with three replications in research farm of Islamic Azad University Yadegare-Imam Khomeini (RAH) Shahre-rey Branch during 2015. In this experiment, irrigation asa major factor in three levels (55, 95, 135 mm evaporation from class A evaporation pan )and methods of PGPRs application as a sub in four levels (seed inoculation, using inirrigation water, seed inoculation + using in irrigation water) were considered. The resultsshowed that drought stress had significant effect on all traits at %1 level of probability, sothat the highest plant height (99/18 cm), number of branches per plant (4.5), capsulesnumber per plant (6), number of seeds per capsule (2.19), 1000 grain weight (18.2 g),grain yield (234.79 kg/ha), biological yield (626.58 kg/ha), harvest index (%42.37) wereconducted in irrigation at 55 mm evaporation from class A evaporation pan. The use ofPGPRs on plant height, number of branches per plant, number of capsules per plant, grainyield, biological yield and harvest index were significant at 1% level of probability. Thehighest amounts of traits were observed in seed inoculation + using in irrigation water. Soit can be stated that the PGPRs application can reduce destructive effects of drought inblack cumin. The seed inoculation + using in irrigation water were the best recommendedtreatment in water deficit stress conditions.
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