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|Title:||The effect of sea brine and bittern on survival and growth of mangrove Avicennia marina (Dicotyledones : Avicenniaceae)|
Joshi, H. V.
Trivedi, R. H.
Ghosh, P. K.
|Abstract:||The effect of 25.5°Be brine and 28.5°Be bittern prepared from 3.5°Be seawater was studied on the juvenile plants of the mangrove Avicennia marina (Forsk.) Vierh under greenhouse conditions. The maximum in elongation growth and percentage increase in number of leaves in 5 % concentration of brine was 35.0 mm and 200 % respectively. However for 5 % bittern they were 33.0 mm and 160 % respectively. The 50 % concentrations of brine and bittern were growth inhibitory while 100 % concentration was lethal during 8 hours continuous exposure for 10 days. The highest growth of the Avicennia marina was observed when brine and bittern were diluted between 20 and 200 times. The undiluted and 50 % diluted brine and bittern were lethal and growth inhibitory, respectively. The leaves were the best indicator of the inhibitory or lethal effects on the plants. The 1 to 5 % brine promoted the growth of the leaves while other concentrations were inhibitory or lethal. However, the bittern in the range of 9 ml l-1 and 1 to 50 % were growth inhibitory for leaves, while 100 % was lethal. The results indicate that discharge of brine and bittern in the marine environment, having semi diurnal tide cycle, will not be toxic or lethal to the plants.|
|Appears in Collections:||IJMS Vol.32(1) [March 2003]|
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