guttation

Guttation is the appearance of drops of xylem sap on the tips or edges of leaves of some vascular plants, such as grasses.At night, transpiration usually does not occur because most plants have their stomata closed. When there is a high soil moisture level, water will enter plant roots, because the water potential of the roots is lower than in the soil solution. The water will accumulate in the plant creating a slight root pressure. The root pressure forces some water to exude through special leaf tip or edge structures, hydathodes, forming drops. Root pressure provides the impetus for this flow, rather than transpirational pull.
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n. guttation, the exudation of liquid water from the uninjured surface of a plant leaf

guttation
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B: (Biologi) gutasi
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