A theory and a model for interpreting the proton nuclear magnetic resonance spectra of water in plant leaves.

Abstract:

:Some plant leaves display complex, orientation-dependent, proton nuclear magnetic resonance (1H NMR) spectra. The spectral patterns vary as the angle between the leaf surface and the applied magnetic field is varied. They also vary with temperature and with the quantity of absorbed manganous ions, but they are independent of magnetic field strength. In this paper, we propose a theory to explain the origin of the spectra and a model from which the patterns can be calculated. The theory shows how heterogeneous magnetic susceptibilities and local dipolar magnetic fields in chloroplasts can shift the water-proton resonance field. The model describes a simplified leaf structure in which the chloroplasts are nonrandomly aligned with respect to the leaf surface. Model calculations are tested by comparison with experimental spectra from hawthorn leaves (Crataegus sp.).

journal_name

Biophys J

journal_title

Biophysical journal

authors

McCain DC,Markley JL

doi

10.1016/S0006-3495(85)83826-1

subject

Has Abstract

pub_date

1985-11-01 00:00:00

pages

687-94

issue

5

eissn

0006-3495

issn

1542-0086

pii

S0006-3495(85)83826-1

journal_volume

48

pub_type

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