Changes in the content of soluble sugars and starch synthesis and degradation during germination and seedling growth of Coffea arabica L
Coffea arabica L. seeds were germinated and seedlings allowed to grow either in the dark or in a 10-h light photoperiodic regimen. During germination endosperm degradation started (10-20 d) while soluble sugars content increased in the axis. During early post-emergence (20-50 d) a rapid increase in dry matter and in starch synthesis in the cotyledons and root-plus-hypocotyl were closely correlated to an intensive endosperm depletion and a decrease in soluble sugars content. In light-grown seedlings total amylase activity was enhanced in the cotyledons and starch degraded in both parts of the seedling over a period of 20 d before chlorophyll attained to its maximum level (60th d). The metabolic changes observed in darkgrown seedlings were slower and starch level in the cotyledons remained high up to the 70th day
| Main Authors: | , |
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| Format: | biblioteca |
| Published: |
1992
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| Subjects: | COFFEA ARABICA, PLANTULAS, MUNDO NOVO, SEMILLAS, GERMINACION, AZUCARES, CONTENIDO DE CARBOHIDRATOS, ETAPAS DE DESARROLLO DE LA PLANTA, |
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