Stomatal characteristics and leaf anatomy of potato plantlets cultured in vitro under photoautotrophic and photomixotrophic conditions

S. M.A. Zobayed, F. Afreen-Zobayed, C. Kubota, T. Kozai

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

Potato plantlets (Solanum tuberosum L. cv. Benimaru) were cultured under photoautotrophic (without any sucrose in the nutrient medium and with enriched CO2 and high photosynthetic photon flux) and photomixotrophic conditions (20 g l-1 sucrose in the medium). Leaf anatomy and stomatal characteristics of the leaves were studied in relation to stomatal size and density. Leaf diffusive resistance, transpiration rate, and wax content of the leaves were also investigated. In the photoautotrophic treatment, stomata behaved normally by closing in the dark and opening in the light. The stomatal density increased twofold compared to that of the photomixotrophic treatment. Relatively thick leaves and an organized palisade layer were observed and the epicuticular wax content was remarkably higher in this treatment, i.e., seven times greater than that of photomixotrophic treatment. In general, higher diffusive resistance of the leaves was observed than under photomixotrophic conditions; also the resistance increased in darkness and decreased in the light. All these characteristics led the plantlets to have a normal and controlled transpiration rate, which was exceptionally high in the photomixotrophic treatment throughout the light and the dark period.

Original languageEnglish (US)
Pages (from-to)183-188
Number of pages6
JournalIn Vitro Cellular and Developmental Biology - Plant
Volume35
Issue number3
DOIs
StatePublished - Jan 1 1999

Keywords

  • Carbon dioxide
  • Diffusive resistance
  • Epicuticular wax
  • Functional stomata
  • Transpiration

ASJC Scopus subject areas

  • Biotechnology
  • Plant Science

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