The sun doesn't shine equally on everyone

• Autores: Yanovsky, Marcelo Javier; Mora Garcia, Santiago
• Año de publicación: 2016
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: Circadian Clock; Epidermis; Light Signalling; Mesophyll; Phloem; Phytochrome a (Phya)
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

For plants, light is not only a basic energ y staple but also a source ofcrucial environme ntal clues. Plant metabolic and developmentalresponses are exquisitely attuned to variations in light quantity,quality, direction and periodicity. Changes in light quantity anddirection unleash a full range of adaptive behaviours, fromreshuffling of photosyn thetic complexes to the reorganization ofthe cellular outfit of light harvesting organs and tropisms. Seasonaldaylength variations synchronize reproductive responses, and diellight cycles impinge on most, if not every, physiological processes.Finally, changes in light wavelength composition allow plants togauge their exposure to direct sunlight and modulate processes likegermination or differential growth to avoid shading by neighbours.Plants sense light conditions through a series of photoreceptors thatcover the range of photosynthetically useful, and potentiallydamaging, radiation. An enormous amount of work has beenamassed throughout several decades on the characterization of thesesensors. However, whether every cell in a plant perceives andresponds to light in a similar way, and how different inputs cometogether to mount coordinated responses in the organism as a wholeare questions that have only recently been tackled. In this issue ofNew Phytologist, Kirchenbauer et al.; (pp. 584-598) provide newevidence indicating that, ind eed, different tissues or cell typespreferentially coordinate certain responses to changes in lightquantity and quality.
Fil: Yanovsky, Marcelo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Bioquímicas de Buenos Aires. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires; Argentina
Fil: Mora Garcia, Santiago. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Bioquímicas de Buenos Aires. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires; Argentina