Transport in plants, Xylem transports water and mineral salts from the roots to the leaves., Phloem transports manufactured food substances to different parts of the plant., Osmosis is the movement of water through a selectively permeable membrane., Active transport helps root cells absorb mineral ions from the soil., Translocation is the movement of manufactured food through the phloem., A mature leaf can act as a source of manufactured food., A developing fruit can act as a sink., Water moves through the plant mainly in the xylem., Wilting and guttation, Wilting occurs when plant cells lose water and become less turgid., A wilted plant has reduced turgor pressure in its cells., Guttation is the release of liquid water from the edges or tips of leaves., Guttation occurs through structures called hydathodes., Guttation commonly occurs at night or early in the morning., Wilting may occur when a plant loses water faster than it absorbs it., Guttation involves liquid water, not water vapour., A plant may wilt when there is insufficient water available to its roots.

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