A Condensation Type Porometer for Field Use | Zendy

S. Moreshet | Zendy; C. S. Yocum | Zendy

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A Condensation Type Porometer for Field Use

Author(s) -

S. Moreshet,

C. S. Yocum

Publication year - 1972

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.49.6.944

Subject(s) - transpiration , materials science , water vapor , diffusion , condensation , thermodynamics , meteorology , botany , physics , biology , photosynthesis

A double cup transpiration porometer is described which simultaneously measures the resistance to water vapor diffusion from the upper and lower epidermises of a leaf. In use the cups are dried, the porometer is clamped on the leaf, and the transit time required for water vapor to condense on a cold (0 C) reflective surface in each cup is recorded. Since the sensing element remains at constant temperature, only transit time and leaf temperature are required to calculate leaf resistance.

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