TY  - JOUR
A1  - Jones, Jeffrey J.
A1  - Huang, Shouguang
A1  - Hedrich, Rainer
A1  - Geilfus, Christoph‐Martin
A1  - Roelfsema, M. Rob G.
T1  - The green light gap: a window of opportunity for optogenetic control of stomatal movement
JF  - New Phytologist
N2  - Green plants are equipped with photoreceptors that are capable of sensing radiation in the ultraviolet‐to‐blue and the red‐to‐far‐red parts of the light spectrum. However, plant cells are not particularly sensitive to green light (GL), and light which lies within this part of the spectrum does not efficiently trigger the opening of stomatal pores. Here, we discuss the current knowledge of stomatal responses to light, which are either provoked via photosynthetically active radiation or by specific blue light (BL) signaling pathways. The limited impact of GL on stomatal movements provides a unique option to use this light quality to control optogenetic tools. Recently, several of these tools have been optimized for use in plant biological research, either to control gene expression, or to provoke ion fluxes. Initial studies with the BL‐activated potassium channel BLINK1 showed that this tool can speed up stomatal movements. Moreover, the GL‐sensitive anion channel GtACR1 can induce stomatal closure, even at conditions that provoke stomatal opening in wild‐type plants. Given that crop plants in controlled‐environment agriculture and horticulture are often cultivated with artificial light sources (i.e. a combination of blue and red light from light‐emitting diodes), GL signals can be used as a remote‐control signal that controls stomatal transpiration and water consumption.
KW  - anion channel
KW  - channelrhodopsin
KW  - Chl
KW  - guard cell
KW  - ion channel
KW  - light‐gated
KW  - membrane potential
KW  - phototropin
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-293724
VL  - 236
IS  - 4
SP  - 1237
EP  - 1244
ER  -