scholarly journals FOLIAR APPLICATION OF POTASSIUM AND ZINC ENHANCES THE PRODUCTIVITY AND VOLATILE OIL CONTENT OF DAMASK ROSE (Rosa damascena Miller var. trigintipetala Dieck)

2021 ◽  
Vol 20 (4) ◽  
pp. 101-114
Author(s):  
Esmat F. Ali ◽  
Fahmy Hassan ◽  
Sayed S.A. Abdel-Rahman ◽  
Kadambot H.M. Siddique
Keyword(s):  
Essential Oil ◽  
Oil Content ◽  
Foliar Application ◽  
Soluble Sugars ◽  
Volatile Oil ◽  
Rosa Damascena ◽  
Optimum Level ◽  
Flower Yield ◽  
Leaf Formation ◽  
Damask Rose

Potassium (K) levels are decreasing worldwide in agricultural soils, and K deficiency is becoming a major issue. Study on damask rose response to K application is scarce. Furthermore, despite its importance in the cell division, photosynthesis and protein synthesis, there is a lack of published reports on plant responses to zinc (Zn) application. Further research is required to understand the damask rose's response to both elements. This study investigated the effects of K and Zn foliar application on the vegetative growth, flower yield, and volatile oil content and composition of damask rose. K and Zn nutrition was applied either individually or combined as K2SO4 and ZnSO4 at 0.5 or 1.0%. Foliar application of K2SO4 and ZnSO4 was applied with a manual pump four times in each growing season, the first at the beginning of stem elongation and leaf formation, and then at two-weekly intervals. Results showed that K and/or Zn treatments significantly improved the growth characters, flower yield, relative water content (RWC), stomatal conductance, and essential oil content and composition such as linalool, nerol, citronellol, geraniol, and nonadecane. The chlorophyll content, total soluble sugars (TSS), and protein content also increased, but free amino acid content decreased, suggesting that the distribution of nitrogenous compounds (between amino acids and proteins) and their transformation were influenced by K and Zn supply. Individual applications of K or Zn increased the N, P, K, and Zn contents in damask rose leaves, relative to the control, which increased further with combined applications of K and Zn. Results suggest that foliar application of K and/or Zn could be part of the damask rose fertilization program to provide plants with the optimum level of nutrition for improving the quantity and quality of flowers and essential oil yields.

scholarly journals Essential oil content and composition in various ecotypes of damask rose from different ecological regions

2021 ◽  
Vol 20 (1) ◽  
pp. 61-69
Author(s):  
Mehran Kanani ◽  
Esmaeil Chamani ◽  
Ali Akbar Shokouhian ◽  
Mousa Torabi-Giglou
Keyword(s):  
Essential Oil ◽  
Oil Content ◽  
Proline Content ◽  
Rosa Damascena ◽  
Food Ingredients ◽  
Ecological Regions ◽  
Rose Oil ◽  
Damask Rose ◽  
Therapeutic Processes ◽  
Preclinical And Clinical Studies

Rosa damascena as a holy ancient plant with modern uses in perfumery and therapeutic processes, should be more investigated due to its utilization in food ingredients, preclinical and clinical studies, and cosmetics industry. Here, we have evaluated the proline content, total phenol of sepal and petal, oil content, and essential oil (EO) composition in different damask rose ecotypes [(Oroumieh; OR), (Golab; GB), (Oskou; OS), (London; LN), and (Mahallat; MT)]. The highest proline and oil content produced in GB ecotype. There was a positive correlation between oil content and proline production in ecotypes (r2 = 0.8064). The major compounds of rose EOs in OR, GB, OS, and MT ecotypes were nonadecane, heneicosane, citronellol, and geraniol. Whereas the main compounds in LN oil were heneicosane (11.43%), Z-5-nonadecene (10.34%), citronellol (8.84%), and geraniol (6.97%). The highest content of Terpenes + Sesquiterpenes were produced in GB followed by MT, while the lowest Terpenes + Sesquiterpenes content were in OR and LN, respectively. Based on the uses of rose oil for cosmetics, medicine, and/or therapeutic processes, the specific ecotype with distinct oil profile can be proposed.

scholarly journals Screening of Rosa damascena Mill. landraces for flower yield and essential oil content in cold climates

2016 ◽  
Vol 28 (1) ◽  
pp. 31-40 ◽  
Author(s):  
Bayzid Yousefi
Keyword(s):  
Essential Oil ◽  
Arid Regions ◽  
Oil Content ◽  
Block Design ◽  
Oil Yield ◽  
Rosa Damascena ◽  
Flower Yield ◽  
Randomized Complete Block Design ◽  
Cool Temperate ◽  
Essential Oil Yield

Abstract In order to evaluate flower yield and essential oil content of Rosa damascena, 49 landraces were studied in a randomized complete block design with three replications in Sanandaj (Iran) during 2004-8. An analysis of variance revealed significant differences (p ≤ 0.01) for the number of flowers per plant, flower and petal weight, flower and petal yield per plant, essential oil ratio and essential oil yield per plant among landraces (G), years (Y) and for landrace × year (GY). The landraces of FA1, KR2, KR3, FA2, AR1 and YZ2 with 3291.9, 2526.4, 2298.7, 2239.8, 2077.6 and 1978.7 kg ha−1, respectively, produced the highest flower yield and the landraces of IS3, IS2, KR2, IS4 and FA2 with 413.25, 378.11, 364.31, 315.30 and 296.10 g ha−1, respectively, produced the highest essential oil among all of the landraces. In accordance to this, cluster analysis also classified high flower and essential oil yield landraces in distinct groups at an 87% similarity. According to the results, most landraces that originated from temperate, warm temperates and arid regions such as the FA2, YZ2 and Isfahan group of landraces produced higher flower yield and essential oil than those from cool, cool temperate, semi-arid and humid regions. Taking into consideration flower yield and essential oil, the landraces of KR2, YZ2, IS3, IS2 and FA2 with 2526.4, 1978.7, 1659.8, 1663.2 and 2239.8 kg ha−1 flower yield, respectively, and 364.31, 265.31, 413.25, 378.11 and 296.10 g ha−1 essential oil, respectively, produced the highest flower yield and essential oil content among the landraces and are recommended for semi-temperate and cool areas.

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