guttation


Also found in: Dictionary, Encyclopedia, Wikipedia.
Related to guttation: Hydathodes
Guttationclick for a larger image
Fig. 184 Guttation . Transverse section of a saxifrage leaf.

guttation

the emergence of water from the endings of leaf veins, usually occurring at night when TRANSPIRATION is low or absent. Guttation is thus a method of exuding excess water and involves special water pores called HYDATHODES at leaf tips which, unlike normal STOMATA, are not able to control their aperture size. The process is common in low-growing plants such as grasses.
References in periodicals archive ?
Guttation refers to the process of exudation of liquid droplets,
machinery and mouths of guttation, absorb and retrieve solutes which are
After one or two applications, plants grown in treated soil may produce toxic pollen, nectar and guttation droplets for more than two seasons.
This slow exudation of liquid water is called guttation.
Guttation occurs when transpiration is nil, such as under very high relative humidity conditions or at night (Nobel, 1999) (Fig.
Shortly after sunrise hoses can be tied between two turf vehicles and dragged across the field to knock dew and guttation off the leaves.
Additionally, guttation and exudation of moisture from leaves is a function of soil moisture and plant water status (Taiz and Zeiger, 1991).
guttation The slow exudation of liquid water from the hydathodes of a leaf.
In some extant angiosperms, guttation occurs primarily in the young leaves, whereas older leaves do not consistently express guttation (e.
When considering total dew in turfgrass systems, the possibility of wound exudates or guttation from individual leaves make the potential contribution of plant-generated moisture much more important than in other crops.
For example, many studies show that teeth are strongly associated with the movement of water out of leaves via transpiration and guttation.
daily dew or guttation fluid removal), a decreased susceptibility of diseased plants to midday wilt when evaporative demand was high.