Intramolecular co-action of two independent photosensory modules in the fern phytochrome 3.
Plant Signal Behav
; 10(11): e1086857, 2015.
Article
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| MEDLINE
| ID: mdl-26340326
ABSTRACT
Fern phytochrome3/neochrome1 (phy3/neo1) is a chimeric photoreceptor composed of a phytochrome-chromophore binding domain and an almost full-length phototropin. phy3 thus contains two different light-sensing modules; a red/far-red light receptor phytochrome and a blue light receptor phototropin. phy3 induces both red light- and blue light-dependent phototropism in phototropin-deficient Arabidopsis thaliana (phot1 phot2) seedlings. The red-light response is dependent on the phytochrome module of phy3, and the blue-light response is dependent on the phototropin module. We recently showed that both the phototropin-sensing module and the phytochrome-sensing module mediate the blue light-dependent phototropic response. Particularly under low-light conditions, these two light-sensing modules cooperate to induce the blue light-dependent phototropic response. This intramolecular co-action of two independent light-sensing modules in phy3 enhances light sensitivity, and perhaps allowed ferns to adapt to the low-light canopy conditions present in angiosperm forests.
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Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Fitocromo
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Helechos
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Luz
Idioma:
En
Revista:
Plant Signal Behav
Asunto de la revista:
BOTANICA
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FISIOLOGIA
Año:
2015
Tipo del documento:
Article
País de afiliación:
Japón