The Control of Autumn Senescence in European Aspen

The initiation, progression, and natural variation of autumn senescence in European aspen (Populus tremula) was investigated by monitoring chlorophyll degradation in (1) trees growing in natural stands and (2) cloned trees growing in a greenhouse under various light regimes. The main trigger for the...

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Autores principales: Fracheboud, Yvan, Luquez, Virginia Martha Cristina, Bjorken, Lars, Sjodin, Andreas, Tuominen, Hannele, Jansson, Stefan
Formato: Articulo
Lenguaje:Inglés
Publicado: 2009
Materias:
Ciencias Agrarias
Árboles
Populus tremula, chlorophyll, bud set
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/74998
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-74998
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
Árboles
Populus tremula, chlorophyll, bud set
spellingShingle Ciencias Agrarias
Árboles
Populus tremula, chlorophyll, bud set
Fracheboud, Yvan
Luquez, Virginia Martha Cristina
Bjorken, Lars
Sjodin, Andreas
Tuominen, Hannele
Jansson, Stefan
The Control of Autumn Senescence in European Aspen
topic_facet Ciencias Agrarias
Árboles
Populus tremula, chlorophyll, bud set
description The initiation, progression, and natural variation of autumn senescence in European aspen (Populus tremula) was investigated by monitoring chlorophyll degradation in (1) trees growing in natural stands and (2) cloned trees growing in a greenhouse under various light regimes. The main trigger for the initiation of autumn senescence in aspen is the shortening photoperiod, but there was a large degree of variation in the onset of senescence, both within local populations and among trees originating from different populations, where it correlated with the latitude of their respective origins. The variation for onset of senescence with a population was much larger than the variation of bud set. Once started, autumn senescence was accelerated by low temperature and longer nights, and clones that started to senescence late had a faster senescence. Bud set and autumn senescence appeared to be under the control of two independent critical photoperiods, but senescence could not be initiated until a certain time after bud set, suggesting that bud set and growth arrest are important for the trees to acquire competence to respond to the photoperiodic trigger to undergo autumn senescence. A timetable of events related to bud set and autumn senescence is presented.
format Articulo
Articulo
author Fracheboud, Yvan
Luquez, Virginia Martha Cristina
Bjorken, Lars
Sjodin, Andreas
Tuominen, Hannele
Jansson, Stefan
author_facet Fracheboud, Yvan
Luquez, Virginia Martha Cristina
Bjorken, Lars
Sjodin, Andreas
Tuominen, Hannele
Jansson, Stefan
author_sort Fracheboud, Yvan
title The Control of Autumn Senescence in European Aspen
title_short The Control of Autumn Senescence in European Aspen
title_full The Control of Autumn Senescence in European Aspen
title_fullStr The Control of Autumn Senescence in European Aspen
title_full_unstemmed The Control of Autumn Senescence in European Aspen
title_sort control of autumn senescence in european aspen
publishDate 2009
url http://sedici.unlp.edu.ar/handle/10915/74998
work_keys_str_mv AT fracheboudyvan thecontrolofautumnsenescenceineuropeanaspen
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