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

doi:10.1007/s11099-009-0068-6

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^*

^*Corresponding author for this work

Department of Life Science

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

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 language	English
Pages (from-to)	445-450
Number of pages	6
Journal	Photosynthetica
Volume	47
Issue number	3
DOIs	https://doi.org/10.1007/s11099-009-0068-6
Publication status	Published - 2009

Keywords

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

ASJC Scopus subject areas

Physiology
Plant Science

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

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.",

keywords = "Chlorophyll, Crassulacean acid metabolism, Leaf thickness, Sun/shade adaptation, Titratable acidity",

author = "Martin, \{C. E.\} and Hsu, \{R. (C C.).\} and Lin, \{T. C.\}",

note = "Funding Information: +Author for correspondence; fax +886-2-29212190, e-mail: [email protected] Abbreviations: CAM – Crassulacean acid metabolism; Chl – chlorophyll; DMF – dimethylformamide. Acknowledgments: Funding for this research was provided, in part, by National Science Council (Taiwan) grant \#95-2313-B-018-001, awarded to T.-C. Lin. Assistance in the field was kindly provided by Gene-Sheng Tung, Chung-Te Chang, and Elizabeth Forsyth. Dr. Chang Su-Hwa generously provided a spectrophotometer in her laboratory for the chlorophyll analyses, and Dr. Yue-Joe Hsia cheerfully provided the climatic data for the study site. We thank Drs. Hen-Biao King and H-M Liu, previous Directors of the Taiwan Forest Research Institute, for their support and logistical assistance for the research. \#This paper is dedicated to Dr. Hen-Biao King on the occasion of his retirement and in honor of his promotion of appreciating nature and of international collaboration in research.",

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language = "English",

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AU - Martin, C. E.

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AU - Lin, T. C.

N1 - Funding Information: +Author for correspondence; fax +886-2-29212190, e-mail: [email protected] Abbreviations: CAM – Crassulacean acid metabolism; Chl – chlorophyll; DMF – dimethylformamide. Acknowledgments: Funding for this research was provided, in part, by National Science Council (Taiwan) grant #95-2313-B-018-001, awarded to T.-C. Lin. Assistance in the field was kindly provided by Gene-Sheng Tung, Chung-Te Chang, and Elizabeth Forsyth. Dr. Chang Su-Hwa generously provided a spectrophotometer in her laboratory for the chlorophyll analyses, and Dr. Yue-Joe Hsia cheerfully provided the climatic data for the study site. We thank Drs. Hen-Biao King and H-M Liu, previous Directors of the Taiwan Forest Research Institute, for their support and logistical assistance for the research. #This paper is dedicated to Dr. Hen-Biao King on the occasion of his retirement and in honor of his promotion of appreciating nature and of international collaboration in research.

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N2 - 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.

AB - 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.

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

Abstract

Keywords

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