Photoinhibition, xanthophyll cycle and in vivo chlorophyll fluorescence quenching of chilling-tolerant Oxyria digyna and chilling-sensitive Zea mays [violaxanthin, zeaxanthin]

chlorophylle chlorophylls clorofilas cold estres fluorescence fluorescencia frio froid light luz photoinhibition photosynthese photosynthesis resistencia a la temperatura stress temperature resistance xanthophylle xanthophylls xantofilas zea mays