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Related Experiment Video

Updated: Jun 22, 2026

Profiling Volatile Compounds in Blackcurrant Fruit using Headspace Solid-Phase Microextraction Coupled to Gas Chromatography-Mass Spectrometry
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Carbon allocation during fruiting in Rubus chamaemorus.

R Gauci1, B Otrysko, J-G Catford

  • 1Département de biologie, Centre de recherche en biologie forestière, Université Laval, Québec City, Québec, G1V 0A6, Canada.

Annals of Botany
|June 13, 2009
PubMed
Summary

Cloudberry (Rubus chamaemorus) growth is source-limited, with non-floral ramets not directly supporting fruit development. Competition for carbon (C) occurs between developing fruit and leaves, with rhizomes playing a complex role.

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Published on: October 5, 2016

Area of Science:

  • Plant Physiology
  • Ecology
  • Carbon Metabolism

Background:

  • Rubus chamaemorus (cloudberry) is a clonal plant with extensive rhizomes and non-floral ramets.
  • Understanding carbon allocation is crucial for cloudberry reproductive success.

Purpose of the Study:

  • Determine if cloudberry growth is source-limited.
  • Investigate carbon translocation from non-floral ramets to fruit.
  • Analyze competition for carbon between fruit, leaves, and rhizomes during fruit development.

Main Methods:

  • Monitoring floral and non-floral ramet activity using gas exchange, (14)CO(2) labeling, and dry mass accumulation.
  • Manipulating source-sink activity by altering leaf presence and rhizome length.

Main Results:

  • Floral ramets exhibited lower photosynthetic rates than deflowered ramets.
  • Fruit acted as a strong carbon sink; non-floral ramets translocated carbon to rhizomes, not fruit.
  • Reduced rhizome length or leaf presence significantly decreased leaf and fruit size.

Conclusions:

  • Cloudberry growth is source-limited, as reduced sink strength did not decrease photosynthesis.
  • Non-floral ramets do not directly contribute to fruit development.
  • Competition exists between developing fruit and leaves for carbon resources, with rhizomes having a dual source/sink role.