Relationship of nuclear magnetic resonance relaxation time to water content and cold hardiness in flower buds of evergreen azalea

Shosuke Kaku, Mari Iwaya-inoue, Lawrence V. Gusta

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The longitudinal relaxation time (T1) of water protons in florets of R. × akebono flower buds was measured with a pulse NMR spectrometer to determine the relationship of T1 to water content and cold hardiness (supercooling ability). Seasonal changes of T1 in florets were closely correlated with water content and supercooling ability of florets. T1 of florets was short for acclimated buds having a low water content and long for non-acclimated buds having a high water content. Flower buds collected in November and stored at 0 and 5°C for 4 weeks had shorter T1 values than buds stored at 10°C even though the floret water content and supercooling ability were similar. Thus, the short T1 of cold acclimated buds hardened naturally or by storage at low temperatures is due to a combination of both reduced water content and temperature.

Original languageEnglish
Pages (from-to)875-882
Number of pages8
JournalPlant and Cell Physiology
Volume25
Issue number6
Publication statusPublished - Sep 1984

All Science Journal Classification (ASJC) codes

  • Physiology
  • Plant Science
  • Cell Biology

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