Carbon allocation during fruiting in Rubus chamaemorus
Background and Aims Rubus chamaemorus (cloudberry) is a herbaceous clonal peatland plant that produces an extensive underground rhizome system with distant ramets. Most of these ramets are non-floral. The main objectives of this study were to determine: ( a ) if plant growth was source limited in cl...
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fthighwire:oai:open-archive.highwire.org:annbot:104/4/703 2023-05-15T18:07:46+02:00 Carbon allocation during fruiting in Rubus chamaemorus Gauci, R. Otrysko, B. Catford, J.-G. Lapointe, L. 2009-09-01 00:00:00.0 text/html http://aob.oxfordjournals.org/cgi/content/short/104/4/703 https://doi.org/10.1093/aob/mcp142 en eng Oxford University Press http://aob.oxfordjournals.org/cgi/content/short/104/4/703 http://dx.doi.org/10.1093/aob/mcp142 Copyright (C) 2009, Oxford University Press ORIGINAL ARTICLES TEXT 2009 fthighwire https://doi.org/10.1093/aob/mcp142 2015-02-28T19:54:01Z Background and Aims Rubus chamaemorus (cloudberry) is a herbaceous clonal peatland plant that produces an extensive underground rhizome system with distant ramets. Most of these ramets are non-floral. The main objectives of this study were to determine: ( a ) if plant growth was source limited in cloudberry; ( b ) if the non-floral ramets translocated carbon (C) to the fruit; and ( c ) if there was competition between fruit, leaves and rhizomes for C during fruit development. Methods Floral and non-floral ramet activities were monitored during the period of flower and fruit development using three approaches: gas exchange measurements, 14CO 2 labelling and dry mass accumulation in the different organs. Source and sink activity were manipulated by eliminating leaves or flowers or by reducing rhizome length. Key Results Photosynthetic rates were lower in floral than in deflowered ramets. Autoradiographs and 14C labelling data clearly indicated that fruit is a very strong sink for the floral ramet, whereas non-floral ramets translocated C toward the rhizome but not toward floral ramets. Nevertheless, rhizomes received some C from the floral ramet throughout the fruiting period. Ramets with shorter rhizomes produced smaller leaves and smaller fruits, and defoliated ramets produced very small fruits. Conclusions Plant growth appears to be source-limited in cloudberry since a reduction in sink strength did not induce a reduction in photosynthetic activity. Non-floral ramets did not participate directly to fruit development. Developing leaves appear to compete with the developing fruit but the intensity of this competition could vary with the specific timing of the two organs. The rhizome appears to act both as a source but also potentially as a sink during fruit development. Further studies are needed to characterize better the complex role played by the rhizome in fruit C nutrition. Text Rubus chamaemorus HighWire Press (Stanford University) Annals of Botany 104 4 703 713 |
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ORIGINAL ARTICLES Gauci, R. Otrysko, B. Catford, J.-G. Lapointe, L. Carbon allocation during fruiting in Rubus chamaemorus |
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ORIGINAL ARTICLES |
description |
Background and Aims Rubus chamaemorus (cloudberry) is a herbaceous clonal peatland plant that produces an extensive underground rhizome system with distant ramets. Most of these ramets are non-floral. The main objectives of this study were to determine: ( a ) if plant growth was source limited in cloudberry; ( b ) if the non-floral ramets translocated carbon (C) to the fruit; and ( c ) if there was competition between fruit, leaves and rhizomes for C during fruit development. Methods Floral and non-floral ramet activities were monitored during the period of flower and fruit development using three approaches: gas exchange measurements, 14CO 2 labelling and dry mass accumulation in the different organs. Source and sink activity were manipulated by eliminating leaves or flowers or by reducing rhizome length. Key Results Photosynthetic rates were lower in floral than in deflowered ramets. Autoradiographs and 14C labelling data clearly indicated that fruit is a very strong sink for the floral ramet, whereas non-floral ramets translocated C toward the rhizome but not toward floral ramets. Nevertheless, rhizomes received some C from the floral ramet throughout the fruiting period. Ramets with shorter rhizomes produced smaller leaves and smaller fruits, and defoliated ramets produced very small fruits. Conclusions Plant growth appears to be source-limited in cloudberry since a reduction in sink strength did not induce a reduction in photosynthetic activity. Non-floral ramets did not participate directly to fruit development. Developing leaves appear to compete with the developing fruit but the intensity of this competition could vary with the specific timing of the two organs. The rhizome appears to act both as a source but also potentially as a sink during fruit development. Further studies are needed to characterize better the complex role played by the rhizome in fruit C nutrition. |
format |
Text |
author |
Gauci, R. Otrysko, B. Catford, J.-G. Lapointe, L. |
author_facet |
Gauci, R. Otrysko, B. Catford, J.-G. Lapointe, L. |
author_sort |
Gauci, R. |
title |
Carbon allocation during fruiting in Rubus chamaemorus |
title_short |
Carbon allocation during fruiting in Rubus chamaemorus |
title_full |
Carbon allocation during fruiting in Rubus chamaemorus |
title_fullStr |
Carbon allocation during fruiting in Rubus chamaemorus |
title_full_unstemmed |
Carbon allocation during fruiting in Rubus chamaemorus |
title_sort |
carbon allocation during fruiting in rubus chamaemorus |
publisher |
Oxford University Press |
publishDate |
2009 |
url |
http://aob.oxfordjournals.org/cgi/content/short/104/4/703 https://doi.org/10.1093/aob/mcp142 |
genre |
Rubus chamaemorus |
genre_facet |
Rubus chamaemorus |
op_relation |
http://aob.oxfordjournals.org/cgi/content/short/104/4/703 http://dx.doi.org/10.1093/aob/mcp142 |
op_rights |
Copyright (C) 2009, Oxford University Press |
op_doi |
https://doi.org/10.1093/aob/mcp142 |
container_title |
Annals of Botany |
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104 |
container_issue |
4 |
container_start_page |
703 |
op_container_end_page |
713 |
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1766179998247419904 |