Biochemical Specialization of Photosynthetic Cell Layers and Carbon Flow Paths in Suaeda monoica | Zendy

Adiva ShomerIlan | Zendy; Ruth Neumann-Ganmore | Zendy; Y. Waisel | Zendy

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Biochemical Specialization of Photosynthetic Cell Layers and Carbon Flow Paths in Suaeda monoica

Author(s) -

Adiva ShomerIlan,

Ruth Neumann-Ganmore,

Y. Waisel

Publication year - 1979

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.64.6.963

Subject(s) - phosphoenolpyruvate carboxylase , pyruvate carboxylase , photosynthesis , biology , botany , biochemistry , chemistry , enzyme

Suaeda monoica Frossk. ex J. F. Gmel is a C(4) plant with three different photosynthesizing cell layers. The outer chlorenchymatous layer shows a high activity of phosphoenolpyruvate (PEP) carboxylase but none of ribulose bisphosphate (RuBP) carboxylase. The electrophoretic protein band of RuBP carboxylase was missing in this layer. The second chlorenchymatous cells layer shows a very high activity of RuBP carboxylase and NAD malic enzyme and only traces of activity of PEP carboxylase. The third photosynthesizing cell type is comprised of the water tissue. It has moderate activities of RuBP carboxylase and PEP carboxylase. A model for carbon flow in Suaeda monoica leaves is proposed.

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