Effects of Plant Growth Promoting Rhizobacteria (PGPR) on Physiological Parameters Against Salinity in Apple Cultivar “Fuji”

Yıl 2020, Cilt: 24 Sayı: 2, 281 - 286, 01.04.2020

Şeyma Arıkan , Lütfi Pırlak

https://doi.org/10.16984/saufenbilder.469522

Cited By: 4

Öz

The present study was conducted with the cultivar ‘Fuji’ grafted on M9 rootstock in both 2014 and 2016 years. The effect of PGPR (Bacillus subtilis EY2, Bacillus atrophaeus EY6, Bacillus spharicus GC subgroup B EY30, Staphylococcus kloosii EY37 and Kocuria erythromyxa EY43) were investigated under salt stress conditions. PGPR’s effects were tested on leaf relative water content (LRWC), membrane permeability, stomatal conductivity, photosynthetic activity and chlorophyll content (by SPAD-502). The saplings were grown in pots filled 2:1:1 peat: perlite: sand. Salinity was obtained by NaCl: Na2SO4: CaCl2: MgSO4 (7:9:3:1) solution. The solution was applied twice a week with irrigation during the growing period. When the salinity reached 2.5-3.0 dScm-1, the solution application was ended. All bacteria treatments significantly reduced the physiological damage of leaves compared with the salt treatment in both two years. The LRWC range from 13.33 % (salt treatment) to 26.76 % (control). The best result of bacteria treatment was measured in EY43 with 23.93 % LRWC. The highest rate of membrane permeability was found in salt treatment (30.35 %). The stomatal conductivity was decreased in the salt application (154.35 mmol m-2s-1) unlike EY43 treatment (234.44 mmol m-2s-1). Similarly, EY43 treatment significantly increased photosynthetic activity (15.24 µmol CO2 m-2s-1) compared with the salt treatment (8.22 µmol CO2 m-2s-1). As a result, bacteria strains had been ameliorative of the deleterious effects under salt stress on “Fuji”.

Anahtar Kelimeler

Salt Stress, Apple, Fuji, PGPR

Kaynakça

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