Electron Spin Resonance of 2,2,6,6-Tetramethylpiperidine-1-Oxyl (TEMPO)-labeled Plant Leaves | Zendy

Rubens Fey | Zendy; M. Workman | Zendy; H Marcellos | Zendy; Michael J. Burke | Zendy

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Electron Spin Resonance of 2,2,6,6-Tetramethylpiperidine-1-Oxyl (TEMPO)-labeled Plant Leaves

Author(s) -

Rubens Fey,

M. Workman,

H Marcellos,

Michael J. Burke

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.63.6.1220

Subject(s) - nitroxide mediated radical polymerization , frost (temperature) , electron paramagnetic resonance , membrane , chemistry , spin probe , phase (matter) , aqueous solution , spin label , supercooling , botany , horticulture , nuclear magnetic resonance , materials science , biochemistry , biology , thermodynamics , organic chemistry , physics , radical polymerization , copolymer , composite material , polymer

Temperature dependence for partitioning of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) between aqueous and lipid components of whole leaf tissue was measured. TEMPO is an electron spin resonance nitroxide label that has been used in model systems to detect membrane phase separations. Measurements were made on chilling-sensitive tomato leaves, frost-sensitive potato leaves, and frost-hardy and supercooled wheat leaves. The results suggest a membrane phase separation at 11 C in tomato, 3 C in potato, and -11 C in wheat.

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