| Título: | Effect of supplemental Ca2+ on NaCl-stressed castor plants (Ricinus communis L.) |
| Autores: |
Joshi, Seema V.; Saurashtra University, Rajkot, Gujarat, India Patel, Neha T.; Saurashtra University, Rajkot, Gujarat, India Pandey, Indu B.; Rajendra Agriculture University, Samastipur, India Pandey, Amar Nath; Saurashtra University, Rajkot, Gujarat, India |
| Fecha: | 2012-03-30 |
| Publicador: | Acta Botánica Croática |
| Fuente: |
 |
| Tipo: |
Peer-reviewed Article Alleviation of salt stress |
| Tema: | Calcium nutrition; castor; plant growth; recovery; salt tolerance; salt stress; water status |
| Descripción: | Greenhouse experiments were conducted to assess the effects of supplemental Ca2+ in salinised soil on germination and plant growth response of castor plant (Ricinus communis L. Var. Avani-31, Euphorbiaceae). NaCl amounting to 390 g was thoroughly mixed with soil of seven lots, of 100 kg each, to give electrical conductivity of 4.1 dS m–1. Further, Ca(NO3)2 × 4H20 to the quantity of 97.5, 195, 292.5, 390, 487.5, and 585 g was separately mixed with soil of six lots to give 1:0.25, 1:0.50, 1:0.75, 1:1, 1:1.25, and 1:1.50 Na+/Ca2+ ratios, respectively. The soil of the seventh lot contained only NaCl and its Na+/Ca2+ ratio was 1:0. Soil without addition of NaCl and Ca (NO3)2 × 4H20 served as control, with a 0:0 Na+/Ca2+ ratio. Salinity significantly retarded seed germination and plant growth, but the deleterious effects of NaCl on seed germination were amelioratedand plant growth was restored with Ca2+ supply at the critical level (1:0.25 Na+/Ca2+ ratio) to salinised soil. Supply of Ca2+ above the critical level further retarded seed germination and plant growth due to the increased soil salinity. Salt stress reduced N, P, K+ and Ca2+content in plant tissues, but these nutrients were restored by addition of Ca2+ at the critical level to saline soil. In contrast, Na+ content in plant tissues significantly increased in response to salinity, but significantly decreased with increasing Ca2+ supply to saline soil.The results are discussed in terms of the beneficial effects of Ca2+ supply on the plant growth of Ricinus communis grown under saline conditions. |
| Idioma: | Inglés |
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