Blue Light Perception and Signal Transduction in Higher Plants

1999 ◽  
pp. 796-820 ◽  
Author(s):  
Jitendra P. Khurana ◽  
Kenneth L. Poff
Keyword(s):  
Signal Transduction ◽  
Blue Light ◽  
Higher Plants ◽  
Light Perception

scholarly journals CLASP stabilizes microtubule plus ends created by serving to drive cortical array reorientation

2017 ◽  
Author(s):  
Jelmer J. Lindeboom ◽  
Masayoshi Nakamura ◽  
Marco Saltini ◽  
Anneke Hibbel ◽  
Ankit Walia ◽  
...  
Keyword(s):  
Computational Modeling ◽  
Blue Light ◽  
Higher Plants ◽  
Alternative Mechanism ◽  
Unanswered Question ◽  
Light Perception ◽  
Major Focus ◽  
Cortical Array ◽  
The Creation

AbstractCentral to building and reorganizing cytoskeletal arrays is the creation of new polymers. While nucleation has been the major focus of study for new microtubule generation, severing has been proposed as an alternative mechanism to create new polymers, a mechanism recently shown to drive the reorientation of cortical arrays of higher plants in response to blue light perception. As severing produces new plus ends behind the stabilizing GTP-cap, an important and unanswered question is how these are stabilized in vivo to promote net microtubule generation. Here we identify the conserved protein CLASP as a potent stabilizer of new plus ends created by katanin severing and find that CLASP is required for rapid cortical array reorientation. In clasp mutants both rescue of shrinking plus ends and the regrowth of plus ends immediately after severing are reduced, computational modeling reveals that it is the specific stabilization of severed ends that explains CLASP’s function in promoting microtubule amplification by severing and cortical array reorientation.

scholarly journals CLASP stabilization of plus ends created by severing promotes microtubule creation and reorientation

2018 ◽  
Vol 218 (1) ◽  
pp. 190-205 ◽  
Author(s):  
Jelmer J. Lindeboom ◽  
Masayoshi Nakamura ◽  
Marco Saltini ◽  
Anneke Hibbel ◽  
Ankit Walia ◽  
...  
Keyword(s):  
Computational Modeling ◽  
Blue Light ◽  
Higher Plants ◽  
Plant Cells ◽  
Alternative Mechanism ◽  
Unanswered Question ◽  
Light Perception ◽  
Major Focus ◽  
Cortical Array

Central to the building and reorganizing cytoskeletal arrays is creation of new polymers. Although nucleation has been the major focus of study for microtubule generation, severing has been proposed as an alternative mechanism to create new polymers, a mechanism recently shown to drive the reorientation of cortical arrays of higher plants in response to blue light perception. Severing produces new plus ends behind the stabilizing GTP-cap. An important and unanswered question is how these ends are stabilized in vivo to promote net microtubule generation. Here we identify the conserved protein CLASP as a potent stabilizer of new plus ends created by katanin severing in plant cells. Clasp mutants are defective in cortical array reorientation. In these mutants, both rescue of shrinking plus ends and the stabilization of plus ends immediately after severing are reduced. Computational modeling reveals that it is the specific stabilization of severed ends that best explains CLASP’s function in promoting microtubule amplification by severing and array reorientation.

scholarly journals Blue light sensing in higher plants.

2001 ◽  
Vol 276 (20) ◽  
pp. 17620
Author(s):  
John M. Christie ◽  
Winslow R. Briggs
Keyword(s):  
Blue Light ◽  
Higher Plants ◽  
Light Sensing

Light Signal Transduction in Higher Plants

2004 ◽  
Vol 38 (1) ◽  
pp. 87-117 ◽  
Author(s):  
Meng Chen ◽  
Joanne Chory ◽  
Christian Fankhauser
Keyword(s):  
Signal Transduction ◽  
Higher Plants ◽  
Light Signal ◽  
Light Signal Transduction

Blue and green are frequently seen: responses of seeds to short- and mid-wavelength light

2011 ◽  
Vol 22 (1) ◽  
pp. 27-35 ◽  
Author(s):  
Danica E. Goggin ◽  
Kathryn J. Steadman
Keyword(s):  
Blue Light ◽  
Seedling Establishment ◽  
Native Species ◽  
Green Light ◽  
Model System ◽  
Light Perception ◽  
Vegetative Tissues ◽  
Wavelength Light

AbstractSeeds have long been a model system for studying the intricacies of phytochrome-mediated light perception and signalling. However, very little is known about how they perceive blue and green light. Cryptochromes and phototropins, the major blue-light receptors in plants, are increasingly well-studied in vegetative tissues, but their role in light perception in seeds largely remains a mystery. Green light elicits a number of responses in plants that cannot be explained by the action of any of the known photoreceptors, and some seeds are apparently also capable of perceiving green light. Here, the responses of seeds to blue and green light are collated from a thorough examination of the literature and considered from the perspective of the potential photoreceptor(s) mediating them. Knowledge of how seeds perceive wavelengths that are suboptimal for phytochrome activation could help to improve germination and seedling establishment for both crop and native species.

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