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sugar transport in plants
i want know,plz, what does determine carbohydrate in which direction
transport or store and how does the leaf stop its carbohydrate transport to a other parts of plant. and the other question is that the carbohydrate storage of fuit is full and transport should be supressed? thank you for your answering |
#2
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sugar transport in plants
i want know,plz, what does determine carbohydrate in which direction
transport or store and how does the leaf stop its carbohydrate transport to a other parts of plant. BRBR As you apparently know already, leaves manufacture sugar all during the growing season. It is transported wherever it is needed for further growth. In the fall, with shorter daylength, all the sugar in the leaves is transported to the roots for winter storage. Then the leaves fall. In the spring, there is a surge of sugar transport back up the tree to the buds, which is why we collect maple sap in the spring. As long as the leaf is green and growing, it is making sugar & sending it to other parts of the plant. the carbohydrate storage of fuit is full and transport should be supressed? BRBR I think what you are asking is, does the plant stop making sugar when it is full of ripe fruit? They are not directly connected, except that fruit is usually ripe in the fall. The main reason leaves stop making sugar is short daylength in the fall. In most tropical areas, there is a wet and dry season, and trees prepare for the dry season the way trees in cold climates prepare for winter. In the rainforest, where there are no seasons, leaves make sugar all year long. Iris, Central NY, Zone 5a, Sunset Zone 40 "If we see light at the end of the tunnel, It's the light of the oncoming train." Robert Lowell (1917-1977) |
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