scholarly journals Sugar Concentrations in Guard Cells of Vicia faba Illuminated with Red or Blue Light

1992 ◽  
Vol 98 (4) ◽  
pp. 1460-1471 ◽  
Author(s):  
Matthew Poffenroth ◽  
David B. Green ◽  
Gary Tallman
Keyword(s):  
Vicia Faba ◽  
Blue Light ◽  
Guard Cells

Synergistic action of red and blue light and action spectra for malate formation in guard cells of Vicia faba L.

Planta ◽  
1978 ◽  
Vol 142 (1) ◽  
pp. 61-65 ◽  
Author(s):  
Teruo Ogawa ◽  
Hirohisa Ishikawa ◽  
Keizo Shimada ◽  
Kazuo Shibata
Keyword(s):  
Vicia Faba ◽  
Blue Light ◽  
Guard Cells ◽  
Synergistic Action ◽  
Action Spectra ◽  
Vicia Faba L

Nitric Oxide Blocks Blue Light-Induced K+ Influx by Elevating the Cytosolic Ca2+ Concentration in Vicia faba L. Guard Cells

2013 ◽  
Vol 55 (6) ◽  
pp. 527-536 ◽  
Author(s):  
Xiang Zhao ◽  
Yuan-Yuan Li ◽  
Hui-Li Xiao ◽  
Chang-Shui Xu ◽  
Xiao Zhang
Keyword(s):  
Nitric Oxide ◽  
Vicia Faba ◽  
Blue Light ◽  
Guard Cells ◽  
Vicia Faba L

Crosstalk of NO with Ca2+ in Stomatal Movement in Vicia faba Guard Cells

2009 ◽  
Vol 35 (8) ◽  
pp. 1491-1499 ◽  
Author(s):  
Lin ZHANG ◽  
Xiang ZHAO ◽  
Ya-Jing WANG ◽  
Xiao ZHANG
Keyword(s):  
Vicia Faba ◽  
Guard Cells ◽  
Stomatal Movement

Fluxes of 86Rb+ in ?isolated? guard cells of Vicia faba L.

Planta ◽  
1990 ◽  
Vol 181 (3) ◽  
Author(s):  
H.M. Brindley
Keyword(s):  
Vicia Faba ◽  
Guard Cells ◽  
Vicia Faba L

scholarly journals Guard cells control hypocotyl elongation through HXK1, HY5, and PIF4

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Gilor Kelly ◽  
Danja Brandsma ◽  
Aiman Egbaria ◽  
Ofer Stein ◽  
Adi Doron-Faigenboim ◽  
...  
Keyword(s):  
Transcription Factors ◽  
Blue Light ◽  
Opposite Effect ◽  
Red Light ◽  
Guard Cells ◽  
Cell Types ◽  
Hypocotyl Elongation ◽  
Sugar Production ◽  
Effect Of Light

AbstractThe hypocotyls of germinating seedlings elongate in a search for light to enable autotrophic sugar production. Upon exposure to light, photoreceptors that are activated by blue and red light halt elongation by preventing the degradation of the hypocotyl-elongation inhibitor HY5 and by inhibiting the activity of the elongation-promoting transcription factors PIFs. The question of how sugar affects hypocotyl elongation and which cell types stimulate and stop that elongation remains unresolved. We found that overexpression of a sugar sensor, Arabidopsis hexokinase 1 (HXK1), in guard cells promotes hypocotyl elongation under white and blue light through PIF4. Furthermore, expression of PIF4 in guard cells is sufficient to promote hypocotyl elongation in the light, while expression of HY5 in guard cells is sufficient to inhibit the elongation of the hy5 mutant and the elongation stimulated by HXK1. HY5 exits the guard cells and inhibits hypocotyl elongation, but is degraded in the dark. We also show that the inhibition of hypocotyl elongation by guard cells’ HY5 involves auto-activation of HY5 expression in other tissues. It appears that guard cells are capable of coordinating hypocotyl elongation and that sugar and HXK1 have the opposite effect of light on hypocotyl elongation, converging at PIF4.

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