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Potential of PGPR in Agricultural Innovations

Plant growth promoting rhizobacteria (PGPR) are a group of free-living bacteria that colonize the rhizosphere and benefit the root growth in plants. Bacteria of diverse genera such as Azospirillium, Bacillus, Burkholderia, Klebsiella, Pseudomonas, etc., were identified as PGPR. These PGPR exert a direct effect on plant growth by inducing the production of phytohormones, supplying biologically fixed nitrogen, and increasing the phosphorous uptake by the solubilization of inorganic phosphates. These bacteria affect plant growth by indirect mechanisms that involve suppression of bacterial, fungal, viral, and nematode pathogens. A lot of study showed that inoculation with PGPR resulted in significant yield increases in different crops, rooting of hardwood and semi-hardwood cuttings, increased germination and enhanced emergence of seeds under different conditions, promoted nutrient uptake of roots, total biomass of the plants, increased seed weight, induced early flowering, etc. In this review, the importance of PGPR is discussed for agricultural innovations with special references that utilises direct and indirect plant growth promotion.

Farklı Dikim Zamanlarının, Erzurum Koşullarında Yüksek Tünelde Yetiştirilen Hıyarda, Gelişme ve Verim Üzerine Etkisi / The Effect Of Planting Times On The Growth and Yield Of Cucumber Grown In a High Tunnel In Erzurum Conditions

OZET: Bu arastirmanin konusu, yuksek tunel altinda farkli dikim zamanlarinin hiyarda bazi gelisme ozellikleri ile verime etkisini belirlemektir. Arastirmada 15 Nisan, 1 Mayis ve 15 Mayis olmak uzere 3 farkli dikim zamani kullanilmistir. Arastirma sonunda, hiyarda dikim zamanlarinin meyve agirligina etkisinin onemli olmadigi tespit edilmistir. Ayrica, verim ve bitki basina meyve sayisinin dikim zamanina gore degistigi belirlenmistir. Bu arastirma, sonuclarina gore, yorede erken donemde yetistiricilige baslamak ve daha yuksek verim elde etmek amaciyla, mayis ayindan itibaren yuksek plastik tunel kullanilarak yetistiricilige baslanmasi onerilir. Anahtar Kelimeler: Hiyar, Dikim Zamani, Yuksek Tunel The Effect Of Planting Times On The Growth and Yield Of Cucumber Grown In a High Tunnel In Erzurum Conditions ABSTRACT: The objective of this study was to determine the effect of planting times on the growth and yield of cucumber in a high tunnel. According to the results, there was no significant effect of planting times on the fruit weight of cucumber in a high tunnel. On the other hand, number of fruit per plant and yield varied with planting times. High tunnels should be used from may onwards in cucumber to start growing early and have a high yield. Key Words: Cucumber, Planting Time, High Tunnel