The Effects of Mycorrhiza and Rhizobacteria Application on Growth and Some Physiological Parameters of Pepper (Capsicum annuum L.) Under Salt Stres
Abstract
Objective: This research was conducted to study effects of mycorrhiza (Glomus intraradices) and rhizobacteria (Bacillus subtilis) applications on plant growth, relative water content (RWC), membrane permeability, proline and chlorophyll content of pepper (Capsicum annuum L. cv Seki F1) under different salt conditions (1.5, 3, 6 dS m-1).
Material and Methods: Three pepper seedlings were planted in long pots (60 x 18 x 21 cm) have a volume of 22 liters and filled with perlite: peat mixture (1:1, v:v). In the study, microorganisms were inoculated together during planting and salt was used at 15 days after planting. After 40 days of salt applications, the physiological parameters such as RWC, , membran permability, chlorophyll and proline content were determined. The study was completed 160 days after planting. At the end of the study, plant growth parameters such as shoot height, stem diameter, dry and fresh weights of shoots and roots were investigated.
Results: The results showed that increasing concentrations of salt decreased all growth parameters. Salt application caused an increase in the proline content, membran permability of plant. But RWC and chlorophyll content were decreased. Mycorrhiza, rhizobacteria and mycorrhiza plus rhizobacteria treatments positively improved plant growth and physiological parameters of pepper plants under all salinity stress levels. G. intraradices plus B. subtilis treated plants were shown highest impact on all parameters under salt stress. The plants (G. intraradices plus B. subtilis application) were followed by only mycorrhiza inoculated plants and only B. subsilis inoculated plants under salt stress.
Conclusion: The results of the study clearly showed that application of G. intraradices plus B. subtilis in pepper cultivation under salt conditions may be a good alternative to decrease negative effects of salt.
Keywords
Glomus intraradices , Bacillus subtilis , Capsicum annuum , Salt stress
Kaynakça
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