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Direct observations of the redox states of frozen cherry buds by a unique in vivo ESR.

Abstract：

:Low temperatures cause cellular damage in flower buds of the sweet cherry (Prunus avium L. cv. Satohnishiki). In this study, the redox states within the cherry buds suffering freezing damage were non-destructively observed by a unique in vivo electron spin resonance (ESR) technique with a spin probe such as carbamoyl-PROXYL. The ESR signals of carbamoyl-PROXYL-treated bud were continuously recorded under freezing and thawing condition, which was decreased to approximately -4 degrees C and maintained for 1.5h, and then returned to room temperature. Most of the buds began to freeze at -2.5 to -3.9 degrees C. The peak areas of the ESR signals significantly increased during the period of temperature rise. These results show that the reduced carbamoyl-PROXYL within the frozen bud was re-oxidized and became ESR-detectable while the bud was thawing. Our in vivo ESR technique has confirmed the oxidative transition of the redox states within the buds during thawing.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Tada M,Shiraishi T,Takashina T,Ohya H,Ogata T

doi

10.1016/j.bbrc.2003.08.123

subject

Has Abstract

pub_date

2003-10-10 00:00:00

pages

72-7

issue

1

eissn

0006-291X

issn

1090-2104

pii

S0006291X03016929

journal_volume

310

pub_type

杂志文章

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