Browsing by Subject "Salt tolerance"

Now showing 1 - 4 of 4
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    Effect of salinisation of soil on growth and macro- and micro-nutrient accumulation in seedlings of Butea monosperma (Fabaceae)
    (Murcia: Universidad de Murcia, Servicio de Publicaciones, 2005) Hirpara, Ketan Damjibhai; Ramoliya, Prakash Jamnadas; Patel, Ashish Dahyabhai; Pandey, Amar Nath; Sin departamento asociado; Facultad de Biología
    Effects of salinisation of soil on emergence, seedling growth and mineral accumulation of Butea monosperma Taub. (Fabaceae) were studied. Sodium chloride (NaCl) was added to the soil and salinity was maintained at 0.3, 1.9, 3.9, 6.2, 8.2, 10.2, 12.2 and 13.8 dSm-1. Salinity caused reduction in water content of all tissues (leaves, stems, tap roots and lateral roots) that resulted in internal water deficit to plants. Increasing salt stress impaired succulent feature of tap roots. Succulence is an adaptation of this tree species to salt stress because it temporarily puts off the setting of severe water deficit induced by salt stress. Sodium content significantly increased in leaves and stems and there was no effective mechanism to block Na transfer to shoot tissues. Potassium content also significantly increased in tissues, however, Na was transferred to the tissues in greater proportion than K. Nitrogen and phosphorus contents significantly decreased in all tissues in response to salinisation of soil. Changes in tissues and whole plant accumulation patterns of the other elements tested, as well as possible mechanisms for avoidance of Na toxicity in this tree species during salinisation, are discussed.
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    Growth, water status and nutrient accumulation of seedlings of Cassia fistula L. in response to soil salinity
    (Murcia : Universidad de Murcia, Servicio de Publicaciones, 2011) Hardikar, Seema Abhay; Pandey, Amar Nath
    Greenhouse experiments were conducted to assess the effect of soil salinity on emergence, growth, water status, proline content and mineral accumulation of seedlings of Cassia fistula L. (Fabaceae). NaCl was added to the soil and salinity was maintained at 0.2, 2.1, 3.9, 6.2, 8.1, 10.0 and 11.9 dSm-1. Salinity caused reduction in water content and water potential of tissues that resulted in internal water deficit to plants. Consequently, seedling growth significantly decreased as salinity increased. Proline content in tissues increased as salinity increased. There were no effective mechanisms to control net uptake of Na+ and subsequently its transport to shoot tissues. Na content significantly increased in tissues as salinity increased. N, K and Ca content in tissues significantly decreased as salinity increased. Changes in tissues and whole-plant accumulation pattern of other nutrients, as well as possible mechanisms for avoidance of Na toxicity in this species in response to salinity, are discussed.
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    Open Access
    Implications of calcium nutrition on the response of Acacia senegal (Mimosaceae) to soil salinity
    (Murcia : Universidad de Murcia, Servicio de Publicaciones, 2011) Tusharbhai Patel, Neha; Sundarjibhai Panchal, Nilesh; Bhushan Pandey, Indu; Nath Pandey, Amar
    Effects of Ca2+ level on the response of germination and seedling growth of Acacia senegal (L.) Willd. (Mimosaceae) to 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 calcium supply at the critical level (1:0.75 Na/Ca ratio) to salinised 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, Ca and Mg content in plant tissues, but these nutrients were restored by addition of calcium at the critical level to saline soil. The opposite was true for Na+. The results are discussed in terms of the beneficial effects of calcium supply on the seedling growth of this species under saline conditions.
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    Open Access
    Implications of calcium nutrition on the response of Butea monosperma (Fabaceae) to Soil Salinit
    (Murcia : Universidad de Murcia, Servicio de Publicaciones, 2010) Mukeshbhai Vaghela, Pratiksha; Tusharbhai Patel, Neha; Bhushan Pandey, Indu; Nath Pandey, Amar
    Effects of Ca2+ level on the response of germination and seedling growth of Butea monosperma (Lam.) Taub. (Fabaceae) to 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 calcium supply at the critical level (1:0.50 Na/Ca ratio) to salinised 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 addition of Ca2+ at the critical level to saline soil. The opposite was true for Na+. The results are discussed in terms of the beneficial effects of calcium supply on the seedling growth of B. monosperma grown under saline conditions.