scholarly journals Fast Fluorescence Quenching from Isolated Guard Cell Chloroplasts of Vicia faba Is Induced by Blue Light and Not by Red Light

1992 ◽  
Vol 100 (3) ◽  
pp. 1562-1566 ◽  
Author(s):  
Alaka Srivastava ◽  
Eduardo Zeiger
Keyword(s):  
Fluorescence Quenching ◽  
Vicia Faba ◽  
Blue Light ◽  
Guard Cell ◽  
Red Light ◽  
Guard Cell Chloroplasts

Blue light-dependent proton extrusion by guard-cell protoplasts of Vicia faba

Nature ◽  
1986 ◽  
Vol 319 (6051) ◽  
pp. 324-326 ◽  
Author(s):  
K. Shimazaki ◽  
M. Iino ◽  
E. Zeiger
Keyword(s):  
Vicia Faba ◽  
Blue Light ◽  
Guard Cell ◽  
Proton Extrusion ◽  
Guard Cell Protoplasts

Ultrastructural observations on guard cells of Vicia faba and Allium porrum

1972 ◽  
Vol 50 (6) ◽  
pp. 1405-1413 ◽  
Author(s):  
W. G. Allaway ◽  
George Setterfield
Keyword(s):  
Vicia Faba ◽  
Small Groups ◽  
Guard Cell ◽  
Cell Walls ◽  
Guard Cells ◽  
Cell Physiology ◽  
Allium Porrum ◽  
Starch Granules ◽  
Mesophyll Cells ◽  
Guard Cell Chloroplasts

Stomata of Vicia faba and Allium porrum were examined in thin section with the electron microscope. Guard cells contained numerous mitochondria, few plastids, and relatively small vacuoles traversed by many strands of cytoplasm. Spherosomes were often observed but were variable in occurrence. Endoplasmic reticulum and dictyosomes were present, although not well developed. Scattered microtubules were present at the periphery of the cells. Microbodies were very rarely observed in guard cells and no plasmodesmata were ever seen in the guard cell walls. Plastids were small and irregular in outline in guard cells of both species. Guard cell plastids of V. faba contained abundant large starch granules. In both species thylakoids were few and grana were small in comparison with mesophyll plastids. The inner of the two bounding membranes of guard cell chloroplasts was extensively invaginated, forming a peripheral reticulum. This was not observed in mesophyll plastids of these species. Small groups of microtubule-like structures were often observed in V. faba guard cell plastids; microtubule-like structures were less frequent in A. porrum plastids, and were not in groups. The structures described are compared with those of other epidermal cells and mesophyll cells, and are discussed in relation to guard cell physiology.

Blue light activates electrogenic ion pumping in guard cell protoplasts of Vicia faba

Nature ◽  
1985 ◽  
Vol 318 (6043) ◽  
pp. 285-287 ◽  
Author(s):  
S. M. Assmann ◽  
L. Simoncini ◽  
J. I. Schroeder
Keyword(s):  
Vicia Faba ◽  
Blue Light ◽  
Guard Cell ◽  
Guard Cell Protoplasts ◽  
Ion Pumping

scholarly journals Blue and red light effects on stomatal oscillations

2019 ◽  
Vol 46 (2) ◽  
pp. 146 ◽  
Author(s):  
Trevor Ballard ◽  
David Peak ◽  
Keith Mott
Keyword(s):  
Blue Light ◽  
Guard Cell ◽  
Red Light ◽  
Guard Cells ◽  
Surrounding Tissue ◽  
Single Pair ◽  
Fibre Optic ◽  
Fibre Optics ◽  
Cell Pair ◽  
Low Intensity

The response of stomata to red and blue light was investigated using small fibre optics (66µm diameter) to control light levels on a single pair of guard cells without affecting the surrounding tissue. Low intensity red light (50µmolm–2s–1) applied to the entire leaf caused stomata to oscillate continuously for several hours with no apparent decrease in amplitude with time. Adding low intensity blue light (50µmolm–2s–1) caused stomata to stop oscillating, but oscillations resumed when the blue light was removed. Adding the same intensity of red light to an oscillating leaf changed the amplitude of the oscillations but did not stop them. When blue light was added to a single guard cell pair (using a fibre optic) in a red-light-illuminated leaf, the stoma formed by that pair stopped oscillating, but adjacent stomata did not. Red light added to a single guard cell pair did not stop oscillations. Finally, blue light applied through a fibre optic to areas of leaf without stomata caused proximal stomata to stop oscillating, but distal stomata continued to oscillate. The data suggest that blue light affects stomata via direct effects on guard cells as well as by indirect effects on other cells in the leaf.

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