This experiment was carried out to elucidate the importance of leaves on vase life of three greenhouse rose cultivars in Khorramabad, Iran, during 2010. Keeping leaves on cut stem or ...
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This experiment was carried out to elucidate the importance of leaves on vase life of three greenhouse rose cultivars in Khorramabad, Iran, during 2010. Keeping leaves on cut stem or defoliation and inclusion of 0 or 4% sucrose in vase water in three rose cultivars (Coffee Break, Polar Star and Full House) were arranged factorially based on a randomized complete blocks design. Results showed that defoliation significantly increased water balance, relative fresh weight and vase life. Inclusion of 4% sucrose in vase water of cut stems having leaves caused leaf damage and decreased water uptake and water loss so that the trends of water uptake and water loss of these stems were the same as defoliated cut stems. Inclusion of sucrose while increasing total soluble solid in petals did not show any positive effect on vase life. Defoliated flower stems in vase water with 0% sucrose showed maximum vase life (11.33 d), following defoliated stems stored in 4% sucrose (10.27 d). Cut stems having leaves with 0 and 4% sucrose (8.87 and 9.07 d, respectively) showed minimum vase life.
Volume 35, Issue 3 , December 2012, , Pages 117-127
Abstract
In this research, we aimed to elucidate the effect of nutrient solution culture on stomatal response to drought stress in high relative air humidity (RH) grown plants using the new ...
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In this research, we aimed to elucidate the effect of nutrient solution culture on stomatal response to drought stress in high relative air humidity (RH) grown plants using the new method of chlorophyll fluorescence measurement under low oxygen concentration. According to the results, stomata of high RH grown plants failed to close fully in response to drought stress. However, growing plants in nutrient solution under high RH produced stomata which closed quickly in response to drought stress. Moreover, stomata of plants grown with a split root system in soil and nutrient solution under high RH closed quickly in response to drought stress. Removing roots from nutrient solution in plants grown with a split root system resulted in diminished closure of stomata in response to drought stress. Evidently, some as yet unidentified positive signals produced by roots growing in nutrient solution, transferred to leaves and resulted in the production of efficient stomata.
