4.Journals Published in Sri Lanka
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Item Effect of soil moisture stress at selected stages of growth on the net photosynthetic rate and stomatal resistance and their impact on the yield of chilli (capsicum annuum L.)(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2000) Mahendran, S.; Bandara, D.C.; De Costa, W.A.J.M.Item The role of starch, sucrose and triose phosphates in the source-sink relationship of soybean(Glycine max L. Merrill)(1992) Bandara, D.C.In a determination of starch, sucrose and triose phosphate in a whole cell homogenate sample and nonaqueously isolated chloroplast sample from plants of different source-sink ratios, the amounts of starch in chloroplasts, the number of starch granules per chloroplast and their size in the sink limited treatment were significantly higher than in the source limited and normal treatments. Thus it could be concluded that starch acts as a messenger from sink to source and thereby act as a regulartor of source-sink relationships. Although there are some indication of regulation by triose phosphate and sucrose their role is less clear.Item Nonaqueous isolation of chloroplasts from soybean (Glycine max L. Merrill) leaves using glycerol and polyethylene glycol(1992) Bandara, D.C.In a nonaqueous method of isolation of chloroplasts using a 5:5 v/v mixture of glycerol and polyethylene glycol (molecular weight 300) the final pellet contained about 50perc. of chloroplasts present in the original sample. Washing of pellet at high speed centrifugation removed most of the cytosol, but electron microscopic examination showed some cytoplasmic contamination. With respect to starch granule size, the isolation precedure yielded a population of chloroplasts not greatly different from those in the starting material. Chlorophyll extraction was also not so severe as with aqueous media.