Growth characteristic and sink strength of fruit at different CO2 concentrations in a Japanese and a Dutch tomato cultivar

Ryo Matsuda, Akimasa Nakano, Dong Hyuk Ahn, Katsumi Suzuki, Ken Ichiro Yasuba, Masuyuki Takaichi

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The aim of the present study was to elucidate how fruit growth was limited by the source and sink capacities in a Japanese ('Momotaro York') and a Dutch ('Dundee') tomato cultivar. The two cultivars were grown hydroponically with a high-wire system in greenhouses for 25 weeks, and the growth characteristics and sink strength of fruit were determined. Fruits were pruned to four (4F) or one (1F) per truss. The latter were used to determine potential fruit growth, an indicator of fruit sink strength. Growth was also determined under normal (LC) and enriched (HC, 700μmolmol-1) CO2 concentrations to examine the effect of source enhancement on fruit production. In both cultivars under normal CO2, the growth rate of fruit pruned to 4F per truss was lower than that in 1F, indicating that maximum potential fruit growth was not achieved. Under HC conditions, fruit growth rate of 'Dundee' achieved in 4F trusses was lower than that in 1F. In 'Momotaro York' in HC, fruit growth in 4F trusses was close to potential. This implies that fruit growth was source-limited irrespective of CO2 concentrations in 'Dundee' cultivar while fruit growth in 'Momotaro York' under normal and enriched CO2 conditions was limited by source and sink strengths, respectively. Adjustments of cultural practices including increasing fruit number per truss and/or genetic approaches to enhancing fruit sink strength by breeding may improve fruit yields of Japanese cultivars under high source/sink conditions.

Original languageEnglish
Pages (from-to)528-534
Number of pages7
JournalScientia Horticulturae
Volume127
Issue number4
DOIs
Publication statusPublished - Feb 10 2011
Externally publishedYes

Keywords

  • CO enrichment
  • Fruit productivity
  • Fruit pruning
  • Potential fruit growth
  • Solanum lycopersicum
  • Source-sink relationship

ASJC Scopus subject areas

  • Horticulture

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