Abstract
Introduction Salinity stress is one of the most deleterious abiotic stress factors that affect the growth, productivity and physiology of plants. Salinity imposes negative effect on the plant growth by decreasing leaf water potential, inducing morphological and physiological changes, production o
Highlights
Salinity stress is one of the most deleterious abiotic stress factors that affect the growth, productivity and physiology of plants
The leaf area, plant height, biomass, carbohydrate assay and the physiological parameters such as leaf water potential, relative water content, water uptake capacity, electrolyte conductivity of soil and relative electrolyte conductivity were studied in five different species of coleus during salinity stress
Relative water content and leaf water potentials were decreased in all the Coleus species subjected to salinity stress (Figure 1 & 2), whereas water uptake capacity and electrolyte leakage levels increased with increasing NaCl concentrations (Figure 3 & 4)
Summary
Salinity stress is one of the most deleterious abiotic stress factors that affect the growth, productivity and physiology of plants. Salinity imposes negative effect on the plant growth by decreasing leaf water potential, inducing morphological and physiological changes, production of reactive oxygen species (ROS), increased osmotic stress, ion toxicity and by altering the biochemical processes[1]. Factors responsible for salinization are climate, human activities, composition of salt and topography of lands[2]. One of the most common sources of salinity is sodium chloride[3]. Salinity increases the concentration of Na+ and Cl- ions and decreases the concentration of N+, PO4-3, K+, Mg+2 and Ca+2 ions in leaves[4]. The growth of plants is affected by reduction in the uptake of water, lack of nutrients and accumulation of toxic sodium and chloride ions[5]. Sodium is responsible for the dispersion of secondary clay minerals in the
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