guard cell

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guard cell

[′gärd ‚sel]
(botany)
Either of two specialized cells surrounding each stoma in the epidermis of plants; functions in regulating stoma size.
References in periodicals archive ?
The average length of stomatal guard cells was 13 (10-16) um and average width of guard cells was 4.
We also propose to incorporate guard cells and particularly when using SAR data, due to the high correlation coefficient in range direction versus azimuth direction.
Results revealed increase in length and width of guard cells of ventral surface (winter samples) and decreased width of rainy samples were negatively correlated with leaf Pb contents.
The first is made of only 2 lateral subsidiary cells around the two guard cells, no terminal cells at the ends of guard cells (11).
Epidermal layers, on the other hand, tend to be translucent and have few or no chloroplasts, except in the guard cells.
Stomata abaxial occur at the same level of the other epidermal cells; guard cells with periclinal thickened cell walls.
All comoviruses studied thus far induce the formation of two different types of cytoplasmic inclusion bodies: a) crystalline inclusions of various and unusual shapes composed of viral particles, which stain violet in Azure A and green in the OG combination (Luxol Brilliant Green BL-Calcomine Orange 2 RS), and are frequently observed in glandular hair cells, guard cells and phloem tissue and occasionally in the epidermis and mesophyll; and b) vesiculate-vacuolate inclusions observed in the cytoplasm of epidermal cells which stain green in OG and red to magenta in Azure A (Gibbs and Paul 1970, Kim and Fulton 1972, Kitajima et al.
Ozone exposure reduced potassium ion flow into guard cells without affecting outward flow, which indicated that ozone inhibits pore openings.
Cesium localization was not observed in relation to stomates, guard cells or subcuticular structures, e.
3C, 3D, 4A, 4C, 4D), with two large guard cells surrounding the stoma on either side (Figs.
Leaf Epidermal Anatomy (LM and SEM): In abaxial epidermis, the leaf epidermal cells were irregular shaped and polygonal, smooth walled, average length of epidermal cells was 70 (60-80) u m and the average width was 50 (40-60) u m, Hypo-stomatic type of stomata were present, number of stomata per unit area was 2, open stomata was 1 and 1 closed stomata was present, average length of guard cells was 45.