Decreasing or non-decreasing allocation of dry matter to fruit in japanese tomato cultivars in spite of the increase in total dry matter of plants by co2elevation and fogging

Tadahisa Higashide, Ken Ichiro Yasuba, Takeshi Kuroyanagi, Akimasa Nakano

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

To investigate the mechanism of yield increase by elevated carbon dioxide (CO2) and fogging in Japanese tomato cultivars (Solanum lycopersicum), total above-ground dry matter (TDM), fraction of dry matter distribution to fruit (FDF), and photosynthetic characteristics were measured in 3 Japanese cultivars grown in elevated CO2 with fogging and ambient CO2 without fogging. Fresh fruit yield and TDM were improved by the elevated CO2 and fogging in the 3 Japanese cultivars. Light use efficiency (LUE) was also increased by the elevated CO2 and fogging. No significant decrease in FDF was observed by the elevated CO2 and fogging in 2 Japanese cultivars, ‘Asabiyori 10’ and ‘Junkei Aichi Fast’. Thus, the increase in TDM by higher LUE contributed directly to the yield increase in these 2 cultivars. However, FDF in ‘Momotaro York’ was decreased significantly by the elevated CO2 and fogging. Thereby, the yield increase by the elevated CO2 and fogging was diminished in ‘Momotaro York’ in spite of the increase in TDM. The number of trusses having immature fruit in ‘Momotaro York’ under elevated CO2 and fogging was significantly higher than those of the others, although no increase in the number of trusses having immature fruit was observed in the other 2 cultivars. Although vegetative growth characteristics such as leaf area, LAI, and fresh and dry weights of leaves and stem were increased by the elevated CO2 and fogging, no negative effects such as a change in light-extinction coefficient and a decrease in maximum photosynthetic rate were observed. The elevated CO2 and fogging increased the number of harvested fruit but decreased weight per fruit, namely, fruit size, in the 3 cultivars.

Original languageEnglish
Pages (from-to)111-121
Number of pages11
JournalHorticulture Journal
Volume84
Issue number2
DOIs
Publication statusPublished - 2015

Keywords

  • Dry matter allocation
  • Humidity
  • Inflorescence appearance
  • Number of immature fruit
  • Tomato yield

ASJC Scopus subject areas

  • Plant Science
  • Horticulture

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