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Woody tissue photosynthesis and its contribution to trunk growth and bud development in young plants

An Saveyn UGent, Kathy Steppe UGent, Nerea Ubierna and Todd E Dawson (2010) PLANT CELL AND ENVIRONMENT. 33(11). p.1949-1958
abstract
Stem photosynthesis can contribute significantly to woody plant carbon balance, particularly in times when leaves are absent or in 'open' crowns with sufficient light penetration. We explored the significance of woody tissue (stem) photosynthesis for the carbon income in three California native plant species via measurements of chlorophyll concentrations, radial stem growth, bud biomass and stable carbon isotope composition of sugars in different plant organs. Young plants of Prunus ilicifolia, Umbellularia californica and Arctostaphylos manzanita were measured and subjected to manipulations at two levels: trunk light exclusion (100 and 50%) and complete defoliation. We found that long-term light exclusion resulted in a reduction in chlorophyll concentration and radial growth, demonstrating that trunk assimilates contributed to trunk carbon income. In addition, bud biomass was lower in covered plants compared to uncovered plants. Excluding 100% of the ambient light from trunks on defoliated plants led to an enrichment in 13C of trunk phloem sugars. We attributed this effect to a reduction in photosynthetic carbon isotope discrimination against 13C that in turn resulted in an enrichment in 13C of bud sugars. Taken together our results reveal that stem photosynthesis contributes to the total carbon income of all species including the buds in defoliated plants.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
FAGUS-SYLVATICA, STEM PHOTOSYNTHESIS, TREE STEMS, BRANCH AUTONOMY, GAS-EXCHANGE, carbon budget, bud development, carbon isotope discrimination, corticular photosynthesis, defoliation, phloem, stem photosynthesis, re-fixation, shade, CARBON-ISOTOPE DISCRIMINATION, CO2 FLUXES, BARK, STARCH, LEAF
journal title
PLANT CELL AND ENVIRONMENT
Plant Cell Environ.
volume
33
issue
11
pages
1949 - 1958
Web of Science type
Article
Web of Science id
000283375200014
JCR category
PLANT SCIENCES
JCR impact factor
5.145 (2010)
JCR rank
10/185 (2010)
JCR quartile
1 (2010)
ISSN
0140-7791
DOI
10.1111/j.1365-3040.2010.02197.x
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1850425
handle
http://hdl.handle.net/1854/LU-1850425
date created
2011-06-30 23:04:30
date last changed
2011-07-04 14:41:22
@article{1850425,
  abstract     = {Stem photosynthesis can contribute significantly to woody plant carbon balance, particularly in times when leaves are absent or in 'open' crowns with sufficient light penetration. We explored the significance of woody tissue (stem) photosynthesis for the carbon income in three California native plant species via measurements of chlorophyll concentrations, radial stem growth, bud biomass and stable carbon isotope composition of sugars in different plant organs. Young plants of Prunus ilicifolia, Umbellularia californica and Arctostaphylos manzanita were measured and subjected to manipulations at two levels: trunk light exclusion (100 and 50\%) and complete defoliation. We found that long-term light exclusion resulted in a reduction in chlorophyll concentration and radial growth, demonstrating that trunk assimilates contributed to trunk carbon income. In addition, bud biomass was lower in covered plants compared to uncovered plants. Excluding 100\% of the ambient light from trunks on defoliated plants led to an enrichment in 13C of trunk phloem sugars. We attributed this effect to a reduction in photosynthetic carbon isotope discrimination against 13C that in turn resulted in an enrichment in 13C of bud sugars. Taken together our results reveal that stem photosynthesis contributes to the total carbon income of all species including the buds in defoliated plants.},
  author       = {Saveyn, An and Steppe, Kathy and Ubierna, Nerea and Dawson, Todd E},
  issn         = {0140-7791},
  journal      = {PLANT CELL AND ENVIRONMENT},
  keyword      = {FAGUS-SYLVATICA,STEM PHOTOSYNTHESIS,TREE STEMS,BRANCH AUTONOMY,GAS-EXCHANGE,carbon budget,bud development,carbon isotope discrimination,corticular photosynthesis,defoliation,phloem,stem photosynthesis,re-fixation,shade,CARBON-ISOTOPE DISCRIMINATION,CO2 FLUXES,BARK,STARCH,LEAF},
  language     = {eng},
  number       = {11},
  pages        = {1949--1958},
  title        = {Woody tissue photosynthesis and its contribution to trunk growth and bud development in young plants},
  url          = {http://dx.doi.org/10.1111/j.1365-3040.2010.02197.x},
  volume       = {33},
  year         = {2010},
}

Chicago
Saveyn, An, Kathy Steppe, Nerea Ubierna, and Todd E Dawson. 2010. “Woody Tissue Photosynthesis and Its Contribution to Trunk Growth and Bud Development in Young Plants.” Plant Cell and Environment 33 (11): 1949–1958.
APA
Saveyn, A., Steppe, K., Ubierna, N., & Dawson, T. E. (2010). Woody tissue photosynthesis and its contribution to trunk growth and bud development in young plants. PLANT CELL AND ENVIRONMENT, 33(11), 1949–1958.
Vancouver
1.
Saveyn A, Steppe K, Ubierna N, Dawson TE. Woody tissue photosynthesis and its contribution to trunk growth and bud development in young plants. PLANT CELL AND ENVIRONMENT. 2010;33(11):1949–58.
MLA
Saveyn, An, Kathy Steppe, Nerea Ubierna, et al. “Woody Tissue Photosynthesis and Its Contribution to Trunk Growth and Bud Development in Young Plants.” PLANT CELL AND ENVIRONMENT 33.11 (2010): 1949–1958. Print.