N A; A R
Abstract
In order to investigate the effect of salinity on morphological, physiological and biochemical characteristics of Lisianthus, a pot experiment was conducted hydroponically in sand. Two Lisianthus varieties (‘Champagne’ and ‘Pure White’) and four NaCl concentrations (0, 20, 40, ...
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In order to investigate the effect of salinity on morphological, physiological and biochemical characteristics of Lisianthus, a pot experiment was conducted hydroponically in sand. Two Lisianthus varieties (‘Champagne’ and ‘Pure White’) and four NaCl concentrations (0, 20, 40, 60 mM) were combined factorially based on a complete randomized design with four replications. The result showed that as salinity increased plant height and fresh and dry weights decreased. Also, chlorophyll a content, photosynthesis rate, and relative water content of plants treated with 60 mM NaCl were, respectively, 31%, 62%, and 20%, lower than the controls. In addition, root length increased with increasing salinity, so that in plants treated with 60 mM NaCl root length was 43% larger than the controls. Further, electrolyte leakage and Malondialdehyde (MDA) content increased with increasing salinity. Results revealed that dry weight, plant height, and photosynthesis rate in ‘Pure White’ were, respectively, 47%, 27%, and 31% higher than in ‘Champagne’. Moreover, under salinity stress, ‘Pure White’ could maintain better morphological and physiological characteristics, i.e. plant height, dry weight, relative water content and cell wall stability compared with ‘Champagne’.
Nabi Ashrafi; Ali Nikbakht; Mehdi Gheysari; Nemat Etemadi; Rikardo fernandezescobar
Abstract
A principle that is of high importance in sustainable landscape management and water-wise landscaping is the wise use of low-quality water resources in agriculture and urban landscape maintenance. In addition, use of trees with low water requirement is a major factor in landscaping. In order to investigate ...
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A principle that is of high importance in sustainable landscape management and water-wise landscaping is the wise use of low-quality water resources in agriculture and urban landscape maintenance. In addition, use of trees with low water requirement is a major factor in landscaping. In order to investigate the impact of water quality and its application method on nutrients absorption by olive trees, an experiment was carried out during 2010-2012 in Isfahan University of Technology on one-year old olive trees. The trees were irrigated by two methods i.e. a new subsurface leaky irrigation (SLI) system and surface irrigation, and two water quality treatments i.e. clear and reclaimed water, for two years Results showed that recycled water increased nutrient elements nitrogen, phosphorous, potassium, and magnesium (N, P, K, Mg) in leaves of the plants. The applied recycled water improved height, shoot number, and chlorophyll content. Irrigating trees by SLI system enhanced growth and shoot number. Nutrient elements (N, Mg, P) content in trees grown under SLI irrigation system was higher than surface system. To sum up, this experiment showed that recycled water could be a promising source for landscape trees irrigation. Also, SLI in this research was more efficient than the surface system in irrigation of urban landscape.