III depicts the healthy as well as damaged epidermal and
guard cells of Bougainvillea spectabilis at control and polluted zones, respectively.
3C, 3D, 4A, 4C, 4D), with two large
guard cells surrounding the stoma on either side (Figs.
Nitric oxide and abscisic acid cross talk in
guard cells. Plant Physiology 128: 790-792.
Abscisic acid introduced into transpiration stream accumulates in the
guard cell apoplast and causes stomatal closure.
Carbonic anhydrases are upstream regulators of CO[sub.2]-controlled stomatal movements in
guard cells. Nat Cell Biol 2010.
endoplasmic reticulum (ER) and a rough
Guard cells ...
The shape of the
guard cells together and also the relation between polar and equatorial diameters of the stomata are indicative of its functionality (Rocha et al., 2007).
The
guard cells length on both surfaces was 22.3 [+ or -] 1.2 [micro]m; the
guard cells density on the adaxial surface was 345.7 [+ or -] 0.7 mm .
The number of stomata per unit area was 4, all the stomata were open and no closed stomata were present, the average length of
guard cells was 27.5 (25-30) um and average width of
guard cells was 6 (5-7) um.
Other than affecting the bulliform cells, water deficit also causes the
guard cells to lose their turgor pressure [66], thus leading to stomatal closure [67].
