Effects of CO2 concentration, PPFD and sucrose concentration on Cymbidium plantlet growth in vitro

J. W. Heo, C. Kubota, T. Kozai

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Leafy Cymbidium protocorm-like bodies (PLBs) were cultured in vitro for 42 days on a half strength Murashige & Skoog (1962) agar (7 g l-1) medium with (30 g l-1) or without (0 g l-1) sucrose under four different environmental conditions of CO2 concentrations (500 or 1000 μmol mol-1) and photosynthetic photon flux density (PPFD) levels (50 or 100 μmol m-2 s-1). On day 15, all plantlets were transferred to new media with or without sucrose. The sucrose concentrations, before and after day 15, were varied or unvaried. This allowed a total of 16 treatments to be completed for this experiment. On day 42, fresh weight, dry weight, leaf area per plantlet, and net photosynthetic rate (NPR) per total dry weight were significantly greater under 1000 μmol mol -1 CO2 and 100 μmol m-2 s-1 PPFD than conventionally grown plantlets (500 μmol mol-1 CO 2, 50 μmol m-2 s-1 PPFD and media with sucrose before and after day 15). The above results show that Cymbidium plantlets could be grown effectively on the medium without sucrose (i.e., photoautotrophically) under enriched CO2 and high PPFD conditions.

Original languageEnglish (US)
Pages (from-to)560-565
Number of pages6
JournalActa Horticulturae
Volume440
DOIs
StatePublished - Dec 1 1996

Keywords

  • Environmental control
  • Micropropagation
  • Net photosynthetic rate
  • Photoautotrophic culture
  • Protocorm-like body (PLB)

ASJC Scopus subject areas

  • Horticulture

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