Stomatal response of three birch species exposed to varying acute doses of SO2

A. R. Biggs, D. D. Davis

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Seedlings of 3 birch species were exposed to either 0.3, 0.6, 0.9, or 1.2 ppm SO2 for 1, 2, 3, or 4 hours. Stomatal conductance rate measurements of 10 plants were taken prior to and immediately following each exposure. The percentage of leaf tissue injured by SO2 was estimated 72 hours after exposure. Stomatal conductance rates of European white birch (Betula pendula Roth.) and yellow birch (B. lutea Michx. f.) increased after exposure to 0.3 ppm SO2 for 1 and 2 hours, and decreased in response to all other doses of SO2. Stomatal conductance rates of gray birch (B. populifolia Marsh.) increased only after exposure to 0.6 ppm SO2 for 1 and 3 hours and decreased in response to all other dosages. European white birch was slightly more susceptible to SO2 than gray birch, whereas yellow birch was tolerant.

Original languageEnglish (US)
Pages (from-to)514-516
Number of pages3
JournalJournal of the American Society for Horticultural Science
Volume105
Issue number4
StatePublished - Jan 1 1980

All Science Journal Classification (ASJC) codes

  • Genetics
  • Horticulture

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