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|Title:||The effect of sea brine and bittern on survival and growth of mangrove <i style="">Avicennia marina </i> (Dicotyledones : Avicenniaceae)|
Joshi, H. V.
Trivedi, R. H.
Ghosh, P. K.
|Abstract:||The effect of 25.5°B<img src=‘/image/spc_char/right_quote.gif’>e brine and 28.5°B<img src=‘/image/spc_char/right_quote.gif’>e bittern prepared from 3.5°B<img src=‘/image/spc_char/right_quote.gif’>e seawater was studied on the juvenile plants of the mangrove <i style="">Avicennia marina </i>(Forsk.) Vierh<i style=""> </i>under greenhouse conditions. The maximum in elongation growth and percentage increase in number of leaves in 5<sub> </sub>% concentration of brine was 35.0 mm and 200<sub> </sub>% respectively. However for 5<sub> </sub>% bittern they were 33.0 mm and 160<sub> </sub>% respectively. The 50<sub> </sub>% concentrations of brine and bittern were growth inhibitory while 100<sub> </sub>% concentration was lethal during 8 hours continuous exposure for 10 days. The highest growth of the <i style="">Avicennia marina</i> was observed when brine and bittern were diluted between 20 and 200 times. The undiluted and 50<sub> </sub>% 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<sub> </sub>% brine promoted the growth of the leaves while other concentrations were inhibitory or lethal. However, the bittern in the range of 9 ml l<sup>-1</sup> and 1 to 50<sub> </sub>% were growth inhibitory for leaves, while 100<sub> </sub>% 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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