Phototropins but not cryptochromes mediate the blue light-specific promotion of stomatal conductance, while both enhance photosynthesis and transpiration under full sunlight
Leaf epidermal peels of Arabidopsis [Arabidopsis thaliana] mutants lacking either phototropins 1 and 2 [phot1 and phot2] or cryptochromes 1 and 2 [cry1 and cry2] exposed to a background of red light show severely impaired stomatal opening responses to blue light. Since phot and cry are UV-A/blue lig...
| Otros Autores: | , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Español |
| Materias: | |
| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2012Boccalandro.pdf LINK AL EDITOR |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
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| 245 | 1 | 0 | |a Phototropins but not cryptochromes mediate the blue light-specific promotion of stomatal conductance, while both enhance photosynthesis and transpiration under full sunlight |
| 520 | |a Leaf epidermal peels of Arabidopsis [Arabidopsis thaliana] mutants lacking either phototropins 1 and 2 [phot1 and phot2] or cryptochromes 1 and 2 [cry1 and cry2] exposed to a background of red light show severely impaired stomatal opening responses to blue light. Since phot and cry are UV-A/blue light photoreceptors, they may be involved in the perception of the blue light-specific signal that induces the aperture of the stomatal pores. In leaf epidermal peels, the blue light-specific effect saturates at low irradiances; therefore, it is considered to operate mainly under the low irradiance of dawn, dusk, or deep canopies. Conversely, we show that both phot1 phot2 and cry1 cry2 have reduced stomatal conductance, transpiration, and photosynthesis, particularly under the high irradiance of full sunlight at midday. These mutants show compromised responses of stomatal conductance to irradiance. However, the effects of phot and cry on photosynthesis were largely nonstomatic. While the stomatal conductance phenotype of phot1 phot2 was blue light specific, cry1 cry2 showed reduced stomatal conductance not only in response to blue light, but also in response to red light. The levels of abscisic acid were elevated in cry1 cry2. We conclude that considering their effects at high irradiances cry and phot are critical for the control of transpiration and photosynthesis rates in the field. The effects of cry on stomatal conductance are largely indirect and involve the control of abscisic acid levels. | ||
| 653 | 0 | |a ABSCISIC ACID | |
| 653 | 0 | |a CRYPTOCHROME | |
| 653 | 0 | |a PHOTOTROPIN | |
| 653 | 0 | |a ARABIDOPSIS | |
| 653 | 0 | |a COLOR | |
| 653 | 0 | |a DRUG EFFECT | |
| 653 | 0 | |a EVAPOTRANSPIRATION | |
| 653 | 0 | |a METABOLISM | |
| 653 | 0 | |a PHENOTYPE | |
| 653 | 0 | |a PHOTOPERIODICITY | |
| 653 | 0 | |a PHOTOSYNTHESIS | |
| 653 | 0 | |a PLANT EPIDERMIS | |
| 653 | 0 | |a PLANT STOMA | |
| 653 | 0 | |a RADIATION EXPOSURE | |
| 653 | 0 | |a SUNLIGHT | |
| 653 | 0 | |a TIME | |
| 653 | 0 | |a CRYPTOCHROMES | |
| 653 | 0 | |a PHOTOPERIOD | |
| 653 | 0 | |a PHOTOTROPINS | |
| 653 | 0 | |a PLANT EPIDERMIS | |
| 653 | 0 | |a PLANT STOMATA | |
| 653 | 0 | |a PLANT TRANSPIRATION | |
| 653 | 0 | |a TIME FACTORS | |
| 653 | 0 | |a ARABIDOPSIS THALIANA | |
| 700 | 1 | |9 67603 |a Boccalandro, Hernán Esteban | |
| 700 | 1 | |9 68225 |a Giordano, Carla V. | |
| 700 | 1 | |9 6393 |a Ploschuk, Edmundo Leonardo | |
| 700 | 1 | |a Piccoli, Patricia Noemí |9 58128 | |
| 700 | 1 | |9 49409 |a Bottini, Rubén | |
| 700 | 1 | |9 792 |a Casal, Jorge José | |
| 773 | |t Plant Physiology |g Vol.158, no.3 (2012), p.1475-1484 | ||
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| 900 | |a ^tPhototropins but not cryptochromes mediate the blue light-specific promotion of stomatal conductance, while both enhance photosynthesis and transpiration under full sunlight | ||
| 900 | |a ^aBoccalandro^bH.E. | ||
| 900 | |a ^aGiordano^bC.V. | ||
| 900 | |a ^aPloschuk^bE.L. | ||
| 900 | |a ^aPiccoli^bP.N. | ||
| 900 | |a ^aBottini^bR. | ||
| 900 | |a ^aCasal^bJ.J. | ||
| 900 | |a ^aBoccalandro^bH. E. | ||
| 900 | |a ^aGiordano^bC. V. | ||
| 900 | |a ^aPloschuk^bE. L. | ||
| 900 | |a ^aPiccoli^bP. N. | ||
| 900 | |a ^aBottini^bR. | ||
| 900 | |a ^aCasal^bJ. J. | ||
| 900 | |a ^aBoccalandro^bH.E.^tInstituto de Biologia Agricola de Mendoza, Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo and Consejo Nacional de Investigaciones Cientificas y Tecnicas, 5507 Chacras de Coria, Argentina | ||
| 900 | |a ^aGiordano^bC.V.^tInstituto de Ciencias Básicas, Universidad Nacional de Cuyo, 5500 Mendoza, Argentina | ||
| 900 | |a ^aPloschuk^bE.L.^tInstituto Argentino de Investigaciones de las Zonas Aridas-Centro Cientifico Tecnologico, CONICET, 5500 Mendoza, Argentina | ||
| 900 | |a ^aPiccoli^bP.N.^tCátedra Cultivos Industriales, Facultad de AgronomÃa, Universidad de Buenos Aires and CONICET, 1417 Buenos Aires, Argentina | ||
| 900 | |a ^aBottini^bR.^tInstituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura, Facultad de AgronomÃa, Universidad de Buenos Aires and CONICET, 1417 Buenos Aires, Argentina | ||
| 900 | |a ^aCasal^bJ.J. | ||
| 900 | |a ^tPlant Physiology^cPlant Physiol. | ||
| 900 | |a eng | ||
| 900 | |a 1475 | ||
| 900 | |a ^i | ||
| 900 | |a Vol. 158, no. 3 | ||
| 900 | |a 1484 | ||
| 900 | |a ABSCISIC ACID | ||
| 900 | |a CRYPTOCHROME | ||
| 900 | |a PHOTOTROPIN | ||
| 900 | |a ARABIDOPSIS | ||
| 900 | |a COLOR | ||
| 900 | |a DRUG EFFECT | ||
| 900 | |a EVAPOTRANSPIRATION | ||
| 900 | |a METABOLISM | ||
| 900 | |a PHENOTYPE | ||
| 900 | |a PHOTOPERIODICITY | ||
| 900 | |a PHOTOSYNTHESIS | ||
| 900 | |a PLANT EPIDERMIS | ||
| 900 | |a PLANT STOMA | ||
| 900 | |a RADIATION EXPOSURE | ||
| 900 | |a SUNLIGHT | ||
| 900 | |a TIME | ||
| 900 | |a CRYPTOCHROMES | ||
| 900 | |a PHOTOPERIOD | ||
| 900 | |a PHOTOTROPINS | ||
| 900 | |a PLANT EPIDERMIS | ||
| 900 | |a PLANT STOMATA | ||
| 900 | |a PLANT TRANSPIRATION | ||
| 900 | |a TIME FACTORS | ||
| 900 | |a ARABIDOPSIS THALIANA | ||
| 900 | |a Leaf epidermal peels of Arabidopsis [Arabidopsis thaliana] mutants lacking either phototropins 1 and 2 [phot1 and phot2] or cryptochromes 1 and 2 [cry1 and cry2] exposed to a background of red light show severely impaired stomatal opening responses to blue light. Since phot and cry are UV-A/blue light photoreceptors, they may be involved in the perception of the blue light-specific signal that induces the aperture of the stomatal pores. In leaf epidermal peels, the blue light-specific effect saturates at low irradiances; therefore, it is considered to operate mainly under the low irradiance of dawn, dusk, or deep canopies. Conversely, we show that both phot1 phot2 and cry1 cry2 have reduced stomatal conductance, transpiration, and photosynthesis, particularly under the high irradiance of full sunlight at midday. These mutants show compromised responses of stomatal conductance to irradiance. However, the effects of phot and cry on photosynthesis were largely nonstomatic. While the stomatal conductance phenotype of phot1 phot2 was blue light specific, cry1 cry2 showed reduced stomatal conductance not only in response to blue light, but also in response to red light. The levels of abscisic acid were elevated in cry1 cry2. We conclude that considering their effects at high irradiances cry and phot are critical for the control of transpiration and photosynthesis rates in the field. The effects of cry on stomatal conductance are largely indirect and involve the control of abscisic acid levels. | ||
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