if the plant was kept in darkness for 2 to 3 days, what is the direction of the flow of carbohydrate at phloem, from the root upwards or from the leaves downwards?
Explain .
Biology ( water relation in plants )
2006-12-09 4:11 am
回答 (1)
2006-12-09 7:29 am
✔ 最佳答案
Upwards. Leaves cannot make carbohydrate in darkness because there is no photosynthesis. The leaf cells need to respire to survive. So carbohydrate from storage organs e.g. root will be transported to leaves to carry out respiration.
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