Morteza Goldani; Yahya Selahvarzi; Jafar Nabati; Morteza Alirezaie Noghondar
Abstract
Salinity is one of the environmental stresses that have limited influence on the crop growth. Oxidative process is a secondary stress due to salinity. Oregano is enumerated as one of the most important of medicinal plant that its production and development is possible in Iran. In order to study the effect ...
Read More
Salinity is one of the environmental stresses that have limited influence on the crop growth. Oxidative process is a secondary stress due to salinity. Oregano is enumerated as one of the most important of medicinal plant that its production and development is possible in Iran. In order to study the effect of exogenous application of hydrogen peroxide on salt tolerance in oregano (Origanum majorana L.) an experiment was conducted in greenhouse conditions. This study was designed as factorial based on completely randomized design with 3 replications. Different concentration of hydrogen peroxide (0, 2.5 and 5 mM) and four levels of NaCl (0, 50, 10 and 150 mM) were treated in this study. Results showed that foliar application of hydrogen peroxide can improve shoot and root dry weight and alleviate adverse effects of salinity. In the other hand, high concentration of hydrogen peroxide (5mM) increased total chlorophyll and caroteoid content about 46.6 and 100.6 percent comparing to control plant, respectively. Salt stress had no significant effect on cellular hydrogen peroxide, but it increased free proline and reduced K:Na ratio. While hydrogen peroxide content, free proline and K:Na ratio were increased 104.6, 320.7 and 77.8 percent by high level of hydrogen peroxide, respectively. The final result showed that foliar application of hydrogen peroxide decreased salt stress.
Morteza Alirezaie Noghondar; Hossein Arouiee; Shamsali Rezazadeh; Mahmood Shoor; Hassan Bayat
Abstract
Abstract
Colchicum kotschyi Boiss (colchicaceae) is one of the sixteen Iranian native colchicum species, containing considerable amount of colchicine. To study the effect of different nutrient levels on corm yield and colchicine content of Colchicum kotschyi Boiss under open field soilless culture, ...
Read More
Abstract
Colchicum kotschyi Boiss (colchicaceae) is one of the sixteen Iranian native colchicum species, containing considerable amount of colchicine. To study the effect of different nutrient levels on corm yield and colchicine content of Colchicum kotschyi Boiss under open field soilless culture, an experiment was performed in a randomized complete design at the Horticultural Research Station of Horticultural Department of Ferdowsi University of Mashhad, during the 2008-2009. Treatments were three nutrient solutions (included; Ι: 100, 60, 150, 105, ΙΙ: 150, 67, 200, 158 and ΙΙΙ: 200, 75, 260, 250 ppm for N, P, K and Ca respectively) with three replications (5 samples per replication). The uniform corms were collected from the wild in august and planted in pots, containing 50% cocopit + 50% perlite, in open field in September and fed by different nutrient solutions. The highest and the lowest fresh and dry yield of corm observed in plants treated by nutrient solutions ΙΙΙ and Ι, respectively. Maximum and minimum of corm dry matter percent, amount of colchicine in per gram of dry matter and total yield of colchicine observed in ΙΙ and Ι nutrient treatments, respectively, were found to be 28.4%, 0.533 mg/g dry matter, 7.04 mg and 23%, 0.264 mg/g dry matter and 2.407 mg, respectively. The results indicated that the best yield of colchicine resulted from the solution of ΙΙ including 150, 67, 200, 158 ppm for N, P, K and Ca, respectively comparing to other treatments.
Keywords: Colchicine, Colchicum kotschyi Boiss, Corm yield, Nutrient solution, Soilless culture
