Nuclear Magnetic Resonance Relaxation Studies of Plant Polyester Dynamics. 2. Suberized Potato Cell Wall

Ruth E. Stark; Joel R. Garbow

doi:10.1021/ma00027a025

Nuclear Magnetic Resonance Relaxation Studies of Plant Polyester Dynamics. 2. Suberized Potato Cell Wall

Ruth E. Stark, Joel R. Garbow

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Abstract

Results of magic-angle-spinning (MAS) ¹³C NMR experiments are reported for the biopolyester suberin grown within potato cell walls. Measurements of the proton rotating-frame relaxation time, T_1ρ(H), indicate that wound healing involves the formation of spatially separated suberin and cell-wall domains. Suberin appears to be attached to the cell-wall domain at discrete sites, with both its methylene and phenylpropanoid groups divided into two populations having distinct chemical shifts and spin-relaxation characteristics. Measurements of T_1ρ(C) and T₁(C) in this biopolymer system show significant site-specific and tissue-specific variations. Taken together, these relaxation experiments reveal a shift of spectral density for the cell wall, upon suberization, toward mid-kilohertz motions which may enhance cuticular resiliency.

Original language	English
Pages (from-to)	149-154
Number of pages	6
Journal	Macromolecules
Volume	25
Issue number	1
DOIs	https://doi.org/10.1021/ma00027a025
State	Published - Jan 1 1992

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title = "Nuclear Magnetic Resonance Relaxation Studies of Plant Polyester Dynamics. 2. Suberized Potato Cell Wall",

abstract = "Results of magic-angle-spinning (MAS) 13C NMR experiments are reported for the biopolyester suberin grown within potato cell walls. Measurements of the proton rotating-frame relaxation time, T1ρ(H), indicate that wound healing involves the formation of spatially separated suberin and cell-wall domains. Suberin appears to be attached to the cell-wall domain at discrete sites, with both its methylene and phenylpropanoid groups divided into two populations having distinct chemical shifts and spin-relaxation characteristics. Measurements of T1ρ(C) and T1(C) in this biopolymer system show significant site-specific and tissue-specific variations. Taken together, these relaxation experiments reveal a shift of spectral density for the cell wall, upon suberization, toward mid-kilohertz motions which may enhance cuticular resiliency.",

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T1 - Nuclear Magnetic Resonance Relaxation Studies of Plant Polyester Dynamics. 2. Suberized Potato Cell Wall

AU - Stark, Ruth E.

AU - Garbow, Joel R.

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N2 - Results of magic-angle-spinning (MAS) 13C NMR experiments are reported for the biopolyester suberin grown within potato cell walls. Measurements of the proton rotating-frame relaxation time, T1ρ(H), indicate that wound healing involves the formation of spatially separated suberin and cell-wall domains. Suberin appears to be attached to the cell-wall domain at discrete sites, with both its methylene and phenylpropanoid groups divided into two populations having distinct chemical shifts and spin-relaxation characteristics. Measurements of T1ρ(C) and T1(C) in this biopolymer system show significant site-specific and tissue-specific variations. Taken together, these relaxation experiments reveal a shift of spectral density for the cell wall, upon suberization, toward mid-kilohertz motions which may enhance cuticular resiliency.

AB - Results of magic-angle-spinning (MAS) 13C NMR experiments are reported for the biopolyester suberin grown within potato cell walls. Measurements of the proton rotating-frame relaxation time, T1ρ(H), indicate that wound healing involves the formation of spatially separated suberin and cell-wall domains. Suberin appears to be attached to the cell-wall domain at discrete sites, with both its methylene and phenylpropanoid groups divided into two populations having distinct chemical shifts and spin-relaxation characteristics. Measurements of T1ρ(C) and T1(C) in this biopolymer system show significant site-specific and tissue-specific variations. Taken together, these relaxation experiments reveal a shift of spectral density for the cell wall, upon suberization, toward mid-kilohertz motions which may enhance cuticular resiliency.

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JO - Macromolecules

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Nuclear Magnetic Resonance Relaxation Studies of Plant Polyester Dynamics. 2. Suberized Potato Cell Wall

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