Journal of Stress Physiology & Biochemistry (Aug 2012)
Effects of Water Deficit and Chitosan Spraying on Osmotic Adjustment and Soluble Protein of Cultivars Castor Bean (Ricinus communis L.)
Abstract
The present study was aimed investigating the effect of water deficit and chitosan spraying on osmotic adjustment and soluble protein of cultivars castor bean under field condition. experiment was carried out as a split factorial based on randomized complete block design with three replications. The results showed that water deficit caused increase a significant (P<0.05) in the concentration of sugars and proline content in the leaves of castor bean. The most amount of total soluble sugars obtain of Levels (D2: Water deficit in beginning of flowering stage, D3: Water deficit in beginning of seedling stage, 0.042%) and minimum amount related to treatment control (D1: complete Irrigation , 0.014%) and maximum proline content related to (D3: water deficit in beginning seedling stage) and minimum proline content related to (D1: complete Irrigation). Also water Deficit caused decrease a significant (P<0.05) in Protein content. The mean comparison shows that maximum amount Protein related to (D1: complete Irrigation, 26.79%) and the minimum amount Protein obtain from (D2: Water deficit in beginning of Flowering stage, 21.04%). also a had cultivars between different a significant (P<0.01) of total soluble sugars. Chitosan spraying no had a significant in osmotic Adjustment and soluble protein. The accumulation of the osmolytes can help the castor bean plant to maintain the cell turgor and the structural integrity of membranes. castor bean herb is drought tolerant, the experimental our, cultivars between no had a significant different of proline and protein content. But, cultivars between had a significant different of total soluble sugars, the result show that cultivar Ahvaz local the most amount of total soluble sugars. therefore suggested that Ahvaz Local cultivar in water deficit condition rate of other cultivar toleranter, we can be with attention Damghan Climate condition, there Cultivate Ahvaz local cultivar.
