How is manufactured food in leaves transported to other parts of the plant ?
A. 1) Food such as sugar is synthesised in the green parts of plants mainly leaves to be transported to actively growing and those which storer food.
2) Phloem is the tissue responsible for transport of food material.
3) The transport of soluble product of pliotosynthesis through phloem is known as translocation.
4) The transport of prepared food and other substances takes place both in upward and downward directions.
5) The translocation is an active process and utilizes energy.
6) Entry of food material into phloem tissue causes increase in osmotic pressure, as a result water from outside moves into phloem.
7) The osmotic pressure moves the dissolved material in the phloem to tissues which have less pressure.
8) Thus material moves in phloem, mainly in sieve tubes, to place of need in the plant body.
In plants sugar is translocated from its storage organs like root or stem to growing regions which need energy.