Effects of plant growth promoting rhizobacteria (PGPR) on rooting and root growth of kiwifruit (Actinidia deliciosa) stem cuttings

YASAR ERTURK ^[2] ; SEZAI ERCISLI ^[1] ; AYHAN HAZNEDAR ^[3] ; RAMAZAN CAKMAKCI ^[1]
1. [1] Atatürk University
  
  Atatürk University
  
  Turquía
2. [2] Ispir Hamza Polat Vocational School Department of Horticulture
3. [3] Ministry of Agriculture Ataturk Tea and Horticulture Research Institute
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Localización: Biological Research, ISSN-e 0717-6287, ISSN 0716-9760, Vol. 43, Nº. 1, 2010, págs. 91-98
Idioma: inglés
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Resumen
- The effects of plant growth promoting rhizobacteria (PGPR) on the rooting and root growth of semi-hardwood and hardwood kiwifruit stem cuttings were investigated. The PGPR used were Bacillus RC23, Paenibacillus polymyxa RC05, Bacillus subtilis OSU142, Bacillus RC03, Comamonas acidovorans RC41, Bacillus megaterium RC01 and Bacillus simplex RC19. All the bacteria showed indole-3-acetic acid (IAA) producing capacity. Among the PGPR used, the highest rooting ratios were obtained at 47.50% for semi-hardwood stem cuttings from Bacillus RC03 and Bacillus simplex RC19 treatments and 42.50% for hardwood stem cuttings from Bacillus RC03. As well, Comamonas acidovorans RC41 inoculations indicated higher value than control treatments. The results suggest that these PGPR can be used in organic nursery material production and point to the feasibility of synthetic auxin (IBA) replacement by organic management based on PGPR.