PJB-2021-748
Seasonal and varietal variations in growth of Roses and characteristic of rose water and rose oil as affected by Plant Growth Promoting Rhizobacteria (PGPR), Salicylic acid (SA) and Zinc sulphate
Mian M, Amanullah
Abstract
Considering the importance of roses in pharmacy and perfume industry present investigation aimed to evaluate the effect of Plant growth promoting rhizobacteria (PGPR) and Salicylic acid (SA) on growth and yield of rose water. Fresh cuttings of two rose cultivars (Rosa centifolia and Rose gruss-an-teplitz) 600 of each cultivar was obtained from 2-3 year’s rose shrubs from Floriculture research area, University of Agriculture Faisalabad. The experiment was conducted both in field and in pots under shade. The pots were sterilized and the soil was autoclaved. Growth parameters, stem and leaf girth , root length and root weight, flower and buds production, were recorded at flowering stage. Rose water was extracted from flowers by steam distillation. Physicochemical analyses of soil has also been performed to execute the residual effect of the treatments on the rhizosphere soil. Results: The results revealed that all the treatments enhanced all growth parameters as well as increased the quality of rose water. Combined treatment of Pseudomonas putida with Salicylic acid showed maximum increases in leaf area (26%), number of buds (100%), plant height (114%) and number of flowers (70%) as compared to untreated control. In pots Bacillus cereus was more effective than Pseudomonas putida and showed (325%) increases in stem girth and number of flowers (420%), number of buds (25%) and plant height (26%) as compared to control. Organoleptic analysis revealed that roses treated with Pseudomonas putida + Salicylic acid (SA) produced highly aromatic and sweet rose water in Rosa gruss-an-teplitz whereas, Bacillus cereus with Salicylic acid (SA) improved sweetness and flavor in Rosa centifolia. Organic matter was increased in the rhizosphere of 2nd year grown plants of both the cultivars in all the treatments of field grown plants but in potted plants the organic matter was increased in all the treatments in both the year. The Ca, P and K was increased in both the PGPR treatments alone and with SA and in both the cultivars and Fe and Mn was higher in PGPR treatments and SA treatments with PGPR . The plants treated with Salicylic acid (SA) alone and with PGPR did not show any pest or parasite attack. PGPR alone and more so in combination with Salicylic may be implicated to improve growth and yield of rose flowers and improve the aroma and to protect the plant from diseases.
To Cite this article:
Download
