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Photoperiod effect on bud burst in Prunus is phase dependent: significance for early photosynthetic development

Photoperiod effect on bud burst in Prunus is phase dependent: significance for early... A 16-h photoperiod stimulated bud burst in mature rooted cuttings of Prunus avium cv. Stella, but not in selfed Stella seedlings. However, in a 12-h photoperiod, bud burst occurred earlier in the seedlings than in the mature cuttings. In the 12-h photoperiod, production of polypeptides involved in carbon dioxide fixation and photosynthetic electron transport was higher in seedlings than in mature cuttings, whereas in the 16-h photoperiod, shoot development and polypeptide production were similar in seedlings and mature cuttings. In both photoperiods, the amount of large subunit of ribulose-1,5-bisphosphate carboxylase/oxygenase that was associated with thylakoid membranes in young leaves was higher in seedlings than in mature cuttings. Transcript levels of rbcL mRNA were influenced by photoperiod in mature cuttings but not in seedlings. In seedlings, early bud burst and development of the light harvesting apparatus would be an advantage at the start of the growing season, before the mature tree canopy reduces irradiances near the woodland floor. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Tree Physiology Oxford University Press

Photoperiod effect on bud burst in Prunus is phase dependent: significance for early photosynthetic development

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References (23)

Publisher
Oxford University Press
Copyright
© Published by Oxford University Press.
ISSN
0829-318X
eISSN
1758-4469
DOI
10.1093/treephys/16.5.491
Publisher site
See Article on Publisher Site

Abstract

A 16-h photoperiod stimulated bud burst in mature rooted cuttings of Prunus avium cv. Stella, but not in selfed Stella seedlings. However, in a 12-h photoperiod, bud burst occurred earlier in the seedlings than in the mature cuttings. In the 12-h photoperiod, production of polypeptides involved in carbon dioxide fixation and photosynthetic electron transport was higher in seedlings than in mature cuttings, whereas in the 16-h photoperiod, shoot development and polypeptide production were similar in seedlings and mature cuttings. In both photoperiods, the amount of large subunit of ribulose-1,5-bisphosphate carboxylase/oxygenase that was associated with thylakoid membranes in young leaves was higher in seedlings than in mature cuttings. Transcript levels of rbcL mRNA were influenced by photoperiod in mature cuttings but not in seedlings. In seedlings, early bud burst and development of the light harvesting apparatus would be an advantage at the start of the growing season, before the mature tree canopy reduces irradiances near the woodland floor.

Journal

Tree PhysiologyOxford University Press

Published: May 1, 1996

Keywords: cytochrome f juvenility photosynthesis Prunus avium rbcL transcripts Rubisco

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