ROOTING OF JUJUBE (Ziziphus jujuba MILL) LI VARIETY CUTTINGS, USING SOME ROOT PROMOTING MICRO-ORGANISMS AND PLANT GROWTH REGULATORS | ||||
| Journal of Plant Production | ||||
| Article 9, Volume 3, Issue 10, October 2012, Page 2607-2624 PDF (666.48 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2012.85007 | ||||
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| Authors | ||||
| Madlen R. Sawarsan1; M. A. Ahmed1; M. N. Omar2 | ||||
| 1Hoticulture Research Institute, Giza, Egypt. | ||||
| 2Soils, Water and Environment Res. Inst., ARC, Giza, Egypt | ||||
| Abstract | ||||
| This study was conducted at the experimental nursery of the Horticulture Research Institute at Giza, Egypt to study the effect of plant growth promoting rhizobacteria (PGPR) and plant growth regulators on rooting of jujube cuttings during 2008 and 2009 seasons. Sub-terminal cuttings were taken on mid April from mature 15- years old trees of jujube (Ziziphus Jujuba Mill) Li variety (difficult to root). Rooting treatments included inoculation with Bacillus polymyx, Bacillus circulance, Bacillus megaterium, Bacillus pasteruii, Pseudomans florescence ormixed inoculants from previous PGPR strains or yeast (Saccharomyces cerevisae). In addition, Indole-3- Butyric Acid (IBA) and Naphthalene Acetic Acid (NAA) were also tested at concentration of 1000 and 2000 ppm as compared with untreated (control). Data showed that the effect of Bacillus megaterium as PGPR resulted in the highest significant rooting percentage (60% and 50%). After eight months of transplanting, bacterial strain (Bacillus megaterium) followed by Pseudomans strain surpassed the other treatments in survival percentage, average number of roots/transplant, stem and root length, number of leaves, number of branches/transplant as well as leaves, stem and root fresh and dry weight (g). On the contrary, the lowest significant effect of treatments was found as a result of NAA at 1000 ppm and control during the two seasons of study. Histological studies revealed that, the callus originated from the cambial and phloem parenchyma cells below the cork cells, from these protrusions the adventitious roots were developed. The new roots established their connections with the vascular tissue of the cutting treated with Bacillus megaterium. Generally, it can be concluded that inoculation jujube (Li variety) sub-terminal cuttings with Bacillus megaterium or Pseudomans florescence can promote root formation as well as increase survival percentage and enhance vegetative growth of the produced transplants. | ||||
| Keywords | ||||
| PGPR; Rooting Jujube; Growth regulators; Anatomical studies | ||||
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