Evaluation of some cyanobacterial strains as growth promoters for sweet pepper (Capsicum annuum var. Annuum) | ||||
| Arab Journal of Biotechnology | ||||
| Volume 21, Issue 1, June 2018, Page 35-58 PDF (12.25 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/arjb.2018.428795 | ||||
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| Abstract | ||||
| Three cyanobacterial strains (Spirulina, Oscillatoria and Anabaena spp.) were produced in forms of liquid culture and powder and evaluated as growth promoters for sweet pepper plants in a pot experiment. The experiment was performed in twenty four treatments including foliar application of cultures, filtrate and dried biomass (which were dissolved either in water or in culture filtrate). The negative control was water while the positive one was the recommended NPK. Spirulina-treated plants recorded high contents in both macroelements and microelements, whereas high concentrations of chlorophyll a, b and total chlorophyll were noticed in Anabaena-treated plants. Treatment with Spirulina showed increase in leaf and root parameters, while stem parameters increased by mixed culture treatment. Both Spirulina and mixed culture treatments showed earliness in flowering (110 days after transplantation). Plants gave fruits with marketable size for most treatments after 40 days of starting blooming, with protein percentages ranging from 23.9 to 16.2%. Among the examined plants, Spirulina - treated plants were the superior in growth over the other treatments. Anatomical examination revealed that Spirulina - treated plants gave the highest increment in lamina thickness than both controls, due mainly to the elevation in spongy tissue thickness. Thickness of lamina positively associated with leaf fresh weight and negatively with leaf area. | ||||
| Keywords | ||||
| Cyanobacteria; Spirulina; Oscillatoria; Anabaena; Sweet pepper; Foliar application; Chemical analysis; Morphological and Anatomical parameters | ||||
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