Edema (plants)

Edema symptoms in plants
Edema showing indentations on the top side of Anthurium regale leaf
Edema on underside of Annona macroprophyllata leaf
A case of edema occurring on a water spinach (ipomoea aquatica) seedling showing corky growths and white crusty eruptions
Edema showing as burst red capillaries on a Ficus lyrata leaf

Edema (also spelled oedema, and named from the analogous disorder in humans and other animals) is a disorder in plants caused by the build-up of water in plant tissues faster than the leaves can transpire. The excess fluid bursts the cell membranes, which can appear as blistery growths, red spots, or small white 'crystals'.

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