Variable Photosynthetic Metabolism in Leaves and Stems of Cissus quadrangularis L. | Zendy

Irwin P. Ting | Zendy; L. O. Sternberg | Zendy; Michael J. DeNiro | Zendy

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Variable Photosynthetic Metabolism in Leaves and Stems of Cissus quadrangularis L.

Author(s) -

Irwin P. Ting,

L. O. Sternberg,

Michael J. DeNiro

Publication year - 1983

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.71.3.677

Subject(s) - crassulacean acid metabolism , photosynthesis , botany , biology , ecophysiology , plant physiology , metabolism , vitaceae , chemistry , biochemistry , vitis vinifera

By measuring titratable acidity, gas exchange parameters, mesophyll succulence, and (13)C/(12)C ratios, we have shown that Cissus quadrangularis L. has C(3)-like leaves and stems with Crassulacean acid metabolism (CAM). In addition, the nonsucculent leaves show the diurnal fluctuations in organic acids termed recycling despite the fact that all CO(2) uptake and stomatal opening occurs during the day. Young succulent stems have more C(3) photosynthesis than older stems, but both have characteristics of CAM. The genus Cissus will be a fruitful group to study the physiology, ecology, and evolution of C(3) and CAM since species occur that exhibit characteristics of both photosynthetic pathways.

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