Chemical changes in microbially infected forest tree seeds
2006
Dayan, M.dP. | Mailum, D.N., Ecosystems Research and Development Bureau, College, Laguna (Philippines). Grassland and Degraded Areas Ecosystems Research Div.
Chemical changes in microbially infected seeds of seven forest tree species, three artificially inoculated and four naturally infected seeds, were studied to determine the effect of microfungi on the food reserves of seeds such as starch, total sugar, and fat. Chemical analysis showed significant reduction in total sugar content of all species, both the artificially inoculated and healthy seed samples. A decrease in starch content was observed on mahogany seeds inoculated with Fusarium moniliforme, F. solani and Lasiodiplodia theobromae; raintree seeds with F. solani, dagang with Colletotrichum gloeosporiodes, F. solani and Ldtheobromae, and kakawate with L.theobromae. For the fat content, the same results were observed except on ipil which had an increase. Insignificant changes in starch content were noted on narra seeds infected with C. gloeosporioides, Phoma sp. and F. moniliforme, and raintree seeds with F. solani comparable with the healthy samples. The changes in ion content, Ca, Mg, P and K of raintree, mahogany, narra and ipil seeds infected with various fungi cited above were insignificant as compared with the healthy seeds, decreased in bagtikan and increased in dagang seeds.
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