Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/249917
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Response of transglutaminase activity and bound putrescine to changes in light intensity under natural or controlled conditions in Quercus ilex leaves |
Autor: | Pintó-Marijuan, Marta; Agazio, Marina de; Zacchini, Massimo; Santos Lozano, M. Asunción CSIC ; Torné, Josep María CSIC; Fleck, Isabel | Fecha de publicación: | 2007 | Editor: | Wiley-VCH | Citación: | Physiologia Plantarum 131(1): 159-169 (2007) | Resumen: | In order to further study a previously observed relationship between polyamine (PA) content and changes in irradiation, we examined the level of free and bound PAs, the activity of transglutaminase (TGase, EC 2.3.2.13) and chlorophyll fluorescence in holm oak (Quercus ilex L.) leaves in response to different levels of light intensity and amount. A diurnal trend of free and bound putrescine (F-Put and B-Put, respectively) and TGase activity was observed in plants under natural conditions in the forest, with the highest value corresponding to the maximum light intensity and amount of light received by the leaves. In another set of experiments, potted Q. ilex plants in experimental fields were subjected to a range of periods of natural photosynthetic photon flux density (PPFD) by covering or not covering the whole trees. Under a natural photoperiod (uncovered leaves), B-Put content and TGase activity paralleled the diurnal PPFD pattern, reaching a maximum at the highest PPFD; prior to this maximum, free PAs showed a significant rise. Plants that were in darkness until midday and suddenly exposed to high light intensity showed enhanced TGase activity, resulting in the maximum accumulation of B-Put. The involvement of the accumulation of B-Put reflected in the changes of the B-Put/bound spermidine ratio during the photoprotective responses to high light stress in forest plants is discussed in relation to the chlorophyll fluorescence parameters observed. | Versión del editor: | https://doi.org/10.1111/j.1399-3054.2007.00939.x | URI: | http://hdl.handle.net/10261/249917 | DOI: | 10.1111/j.1399-3054.2007.00939.x | ISSN: | 0031-9317 |
Aparece en las colecciones: | (CRAG) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
accesoRestringido.pdf | 59,24 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
16
checked on 25-abr-2024
WEB OF SCIENCETM
Citations
16
checked on 24-feb-2024
Page view(s)
53
checked on 30-abr-2024
Download(s)
14
checked on 30-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.