N. Foroumand; S. Kalate Jari; V. Zarrinnia
Abstract
Rose is one of the most important cut flowers in the world, which its post-harvest preservation is considered as an important challenge. In this research, the effect of 200, 400 and 600 ppm concentrations of chitosan, cumin (Cuminum cyminum L.) and cinnamon (Cinnamomum verum L.) essential oils on post-harvest ...
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Rose is one of the most important cut flowers in the world, which its post-harvest preservation is considered as an important challenge. In this research, the effect of 200, 400 and 600 ppm concentrations of chitosan, cumin (Cuminum cyminum L.) and cinnamon (Cinnamomum verum L.) essential oils on post-harvest quality and inhibition of fungi Botrytis cinerea, the cause of gray mold disease, was evaluated in rose cv. Dolce Vita cut flower under laboratory conditions. For this purpose, the flowers were put in solutions with different concentrations for one hour and then were transferred into distilled water until the end of vase life. Characteristics such as vase life, petal membrane stability index, leaf chlorophyll content, leaf, petal and stem water content, and petal soluble carbohydrate content were analyzed and recorded for 9 days after treatment with 3 days intervals. Application of herbal essential oils and chitosan at different post-harvest times resulted in improvement of most of the studied traits. Concentration of 200 ppm of chitosan and essential oils of cinnamon and cumin treatments was better than other concentrations in improving the majority of survival traits. Treatments at 400 and 600 ppm concentrations prevented the growth of B. cinerea completely, too. The results of this study indicated that the use of chitosan and plant essential oils of cumin and cinnamon improved post-harvest qualitative characteristics and inhibited B. cinerea fungi and thus increased the vase life of rose cv. Dolce Vita. Therefore, the use of these bio-compounds in the form of a stable formulation is recommended to increase the shelf-life and improve the quality and quantity of rose cut flower.
S. Kazemian; V. Zarrinnia; M. Khosroshahli; N. Hasanzadeh
Abstract
Tomato gray mold disease, caused by Botrytis cinerea, is one of the most important tomato diseases. In recent years, the application of nanoparticles for the control of plant diseases has been given special attention. In this research, the effect of copper oxide nanoparticles biosynthesized by plant ...
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Tomato gray mold disease, caused by Botrytis cinerea, is one of the most important tomato diseases. In recent years, the application of nanoparticles for the control of plant diseases has been given special attention. In this research, the effect of copper oxide nanoparticles biosynthesized by plant extract of eucalyptus was investigated. Three experiments were conducted in order to control the severity of gray mold disease under different growth conditions. In the first experiment, the effects of nanoparticles at concentrations of 100, 200, 400 and 600 ppm were investigated. In the second experiment, two more concentrated extracts i.e. 800 and 1200 were investigated. In the third experiment, the effect of three concentrations of 400, 600 and 800 ppm of copper oxide nanoparticles on the severity of mildew disease on detached leaves was investigated. The results of all three experiments indicated that 1) Copper oxide nanoparticles can control the growth of B. cinerea and gray mildew disease in both in vitro and in vitro conditions. 2) The relationship between the concentration of copper oxide nanoparticles and the inhibitory effect on fungal growth and disease control was invertible and significant at 1% probability level (P≤1%). In fact, the most effective concentrations were obtained at 400 and 600 ppm, 800 and 1200 ppm, and 600 and 800 ppm under in vitro, in vivo,and detached leaf assay, respectively. Accordingly, with increasing concentrations of copper oxide nanoparticles, the rate of growth of the fungus colony decreased and the severity of the disease decreased. Based on these results, the application of green synthesized copper oxide nanoparticles was recommended in controlling of gray mold disease caused by Botrytis cinerea.
