Ashish Patel

EFFECT OF SALINIZATION OF SOIL ON GROWTH, WATER STATUS AND NUTRIENT ACCUMULATION IN SEEDLINGS OF ACACIA AURICULIFORMIS (FABACEAE)

Greenhouse experiments were conducted to assess the effects of salinization of soil on emergence, growth, water status, proline content, and mineral accumulation of seedlings of Acacia auriculiformis A. Cunn. ex Benth. (Fabaceae). Sodium chloride (NaCl) was added to the soil and salinity was maintained at 0.3, 3.9, 6.0, 7.9, 10.0, 12.1, and 13.9 dS m−1. Salinity caused reduction in water potential of tissues, which resulted in internal water deficit to plants. Consequently, seedling growth significantly decreased with increase in soil salinity. Proline content in tissues increased with increase in salinity. Potassium and sodium content significantly increased in tissues as salinity increased. Nitrogen content significantly increased in tissues with salinization of soil. Phosphorus, calcium and magnesium content significantly decreased as salinity increased. Changes in tissues and whole-plant accumulation patterns of other nutrients, as well as possible mechanisms for avoidance of sodium toxicity in this tree species in response to salinity, are discussed.

Implications of Calcium Nutrition on the Response of Salvadora oleoides (Salvadoraceae) to Soil Salinity

Greenhouse experiments were conducted to assess the effects of supplemental calcium in salinized soil on the response of germination and seedling growth of Salvadora oleoides, Decne. (Salvadoraceae). NaCl and CaSO4·2H2O were added to the soil and 0:0, 1:0, 1:0.25, 1:0.50, 1:0.75, 1:1, 1:1.25, and 1:1.50 Na/Ca ratios were maintained. Salinity significantly retarded the seed germination and seedling growth, but the injurious effects of NaCl on seed germination were ameliorated and seedling growth was restored with calcium supply at the critical level (1:0.50 Na/Ca ratio) to salinized soil. Calcium supply above the critical level further retarded the seed germination and seedling growth due to the increased soil salinity. Salt stress reduced N, P, K, and Ca content in plant tissues, but these nutrients were restored by the addition of calcium at the critical level to saline soil. The opposite was true for Na+. The results are discussed in terms of beneficial effects of calcium supply on the seedling growth of Salvadora oleoides grown under saline conditions.

Implications of calcium nutrition on the response of Salvadora persica (Salvadoraceae) to soil salinity.

Effects of Ca (Ca2+) level on the response of germination and seedling growth of Salvadora persica Linn. (Salvadoraceae) to sodium chloride (NaCl) salinity in soil were investigated. Salinity significantly retarded the seed germination and seedling growth, but the injurious effects of NaCl on seed germination were ameliorated and seedling growth was restored with Ca supply at the critical level to salinized soil. Calcium supply above the critical level further retarded the seed germination and seedling growth because of the increased soil salinity. Salt stress reduced nitrogen, phosphorus, potassium, and Ca content in plant tissues, but these nutrients were restored by addition of Ca at the critical level to saline soil. The opposite was true for sodium (Na+). The results are discussed in terms of the beneficial effects of Ca for plant growth under saline conditions.

Physicochemical properties of some tetrahydropyrimidine derivatives

Production of tetrahydropyrimidine and their derivatives is of great importance in organic chemistry. Presence of pyrimidine piece in different biological compounds that are used in several medications makes it a crucial component. In this study, some new tetrahydropyrimidine compounds are synthesized and their physicochemical properties such as such as density, refractive index, partition coefficients have been studied in different solvents at 308.15K.