Salt tolerance in eighteen advanced rice genotypes was studied under an artificially salinized (EC=8.5 dSm-1) soil conditions after 90 days of transplanting. The results showed that the yield per plant, chlorophyll concentrations, fertility percentage, and number of productive tillers, panicle length and number of primary braches per panicle of all the genotypes were reduced by salinity. However, genotypes viz. Jhona-349 x Basmati-370, NR-1, DM-59418, DM-63275, DM-64198 and DM-38-88 showed better salinity tolerance than others.

No abstract

This study reports the effect of salinity and inoculation on growth, ion uptake and nitrogen fixation by Vigna radiata. A soil ECe level of 7.5 dS m ~ was quite detrimental causing about 60% decline in dry matter. and grain yield of mungbean plants whereas a soil ECe level of 10.0 dS m-t was almost toxic. In contrast most of the studied strains of Rhizobium were salt tolerant. Nevertheless, nodulation, nitrogen fixation and total nitrogen concentration in the plant was drastically affected at high salt concentration. A noticeable decline in acetylene reduction activity occurred when salinity level increased to 7.5 dS m -l.

Atriplex amnieola, was grown in nutrient solution cultures with concentrations of NaCl up to 750 mol m"-\ The growth optimum was at 25-50 mol m"-^ NaCl and growth was 10-15% of that value at 750 mol m~^ NaCl. Sodium chloride at 200 mol m" ^ and higher reduced the rate of leaf extension and increased the time taken for a leaf to reach its maximal length.

Abstract. Aspects of the response of Kallar grass (Diplachne fusca) to root salinity have been studied. Field observation on the high level of tolerance of this species have been mirrored in pot trials and a 50% yield (dry matter) was obtained at ECe 22.3. While salt stress led to Na and Cl uptake, most of these ions appeared to be secreted selectively from the leaves. The shoot K+ content on a tissue water basis remained unaffected by salt stress and the shoot tissue had a high K+ selectivity. Osmotic adaptation was mainly brought about by tissue dehydration and not net salt accumulation although the compatible solute glycinebetaine was accumulated in fairly high concentrations. The organic and inorganic chemical composition of the shoots, including the trace elements Zn, Fe, Cu and Mn, is such as to make this species a highly promising plant for the exploitation of saline soils which might otherwise not be amenable to agriculture use.