Untitled

Abstract

Multiple shoots of mulberry (Morus alba cv Khonpai), a NaCl-tolerant cultivar, were grown on MS media without or with NaCl. On medium with increasing NaCl concentration up to 150 mM, the shoots exhibited slightly reduction in growth. On the other hand, when the concentration of NaCl increased to 200 mM, the growth was completely inhibited and the necrosis of leaves tissue was observed. The relative water content was significantly decreased in leaves treated with NaCl concentration of 150 and 200 mM compared to that in leaves without NaCl treatment. The total chlorophyll content was significantly lower in leaves of salt treated multiple shoots than in leaves of control multiple shoots. Comparing shoots grown on media without to with 150 mM NaCl, the proline content in leaves was increased to approximately 11-fold and the ascorbate peroxidase activity in leaves was increased to approximately 91%.

Raising Beet Tolerance to Salinity through Bioaugmentation with Halotolerant Endophytes

“…The increase in hydrogen peroxide concentration in response to salt stress was observed with other plant species, e.g., mung bean (Vigna radiata), rice (Oryza sativa), and mulberry (Morus sp.) [54,60,61]. The results of our study indicated a positive correlation between the level of hydrogen peroxide in roots, stems and leaves of B. vulgaris and NaCl concentration.…”

“…The accumulation of compatible solutes, including proline, is a very important defense mechanism against salinity stress and is responsible for intracellular osmotic equilibrium maintaining [52,53]. An increase in proline levels in plants growing under salt stress was observed in different plant species, including canola (Brassica napus), dill (Anethum graveolens), mulberry (Morus alba cv Khonpai), pistachio (Pistacia vera L.) and Jerusalem artichoke (Helianthus tuberosus) [28,39,[54][55][56][57]. The accumulation of proline in plants growing under salt stress is associated with the low activity of antioxidant enzymes [58], which is accompanied by an increase in the level of ROS [21,59].…”

Evaluation of Some Rhodes Grass (Chloris gayana) Genotypes for Their Salt Tolerance, Biomass Yield and Nutrient Composition

“…However, high chlorophyll content (SPAD value) was detected in salt-tolerant genotypes. These higher chlorophyll values can be ascribed to an improved photosynthetic rate and higher dry matter production [31,32]. The reduction in chlorophyll content under marginal environments has been observed in many previous studies [19,25,31].…”

Physiological Role of Humic Acid and Nicotinamide on Improving Plant Growth, Yield, and Mineral Nutrient of Wheat (<i>Triticum durum</i>) Grown under Newly Reclaimed Sandy Soil

“…Many functions have been postulated for proline accumulation in plant tissues, proline and free amino acids could be involved in the osmotic adjustment of plants [45] and could also be a protective agent of enzymes and membranes [46]. When plant subjected to drought stress, plants maintain their water content by accumulation of compatible organic solutes act as osmoprotectants, such as proline, in their cytoplasm [47]. Proline accumulation under drought stress has been reported and suggested to be a biochemical marker for increased stress tolerance in plant species under stress conditions.…”