The relationship between CAM and leaf succulence in two epiphytic vines, Hoya carnosa and Dischidia formosana (Asclepiadaceae), in a subtropical rainforest in northeastern Taiwan

C. E. Martin, R. (C C.). Hsu, T. C. Lin

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Abstract

Past reports of correlations between Crassulacean acid metabolism (CAM) and leaf succulence are based on multi-species comparisons. When different individuals of the same species were compared in two epiphytic CAM vines growing in a subtropical rainforest in northeastern Taiwan, the degree of CAM was not correlated with leaf thickness, a measure of succulence. Leaf chlorophyll (Chl) a and b concentrations and ratios correlated well with leaf succulence, indicating that differences in leaf succulence were likely a result of sun/shade adaptations, not photosynthetic pathway. These findings challenge the assumption that CAM-succulence correlations are causal.

Original languageEnglish
Pages (from-to)445-450
Number of pages6
JournalPhotosynthetica
Volume47
Issue number3
DOIs
Publication statusPublished - 2009 Nov 27

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Keywords

  • Chlorophyll
  • Crassulacean acid metabolism
  • Leaf thickness
  • Sun/shade adaptation
  • Titratable acidity

ASJC Scopus subject areas

  • Physiology
  • Plant Science

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