Temperature Effects on Radial Propagation of Water Potential in Cotton Stem Bark | Zendy

Betty Klepper | Zendy; Fred J. Molz | Zendy; Curt M. Peterson | Zendy

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Temperature Effects on Radial Propagation of Water Potential in Cotton Stem Bark

Author(s) -

Betty Klepper,

Fred J. Molz,

Curt M. Peterson

Publication year - 1973

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.52.6.565

Subject(s) - phloem , xylem , flux (metallurgy) , botany , water flow , diffusion , bark (sound) , biology , chemistry , environmental science , soil science , thermodynamics , ecology , physics , organic chemistry

Low temperature affects the lateral movement of water across the xylem-phloem boundary in intact cotton stems. There is a reduction in the effective diffusion coefficient relating free energy flux to water potential gradients with an associated increase in resistance to water flow. Detached phloem and excised leaves do not show this effect of low temperature. Experiments on stem section halves indicate that the effect is probably associated with the cambial region.

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