Superproduction of heavy minicircular mitochondrial DNA in aging wheat coleoptiles.

Abstract:

:On incubation of 7-day-old wheat seedlings in the presence of [3H]thymidine, the radioactivity incorporated into coleoptile DNA is found to be localized mainly (greater than 95%) in the fraction of heavy mitochondrial DNA (H-mt DNA; rho = 1.716 gm/cm3). Upon long (48-72 h) incubation of cut-off seedlings in water, the amount of this DNA shows a dramatic increase and corresponds to about 10% of the total coleoptile DNA. H-mtDNA is represented by open circular molecules with a contour length varying from 0.12 to 0.6 microns. The functional role of this DNA is still unknown.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Kirnos MD,Alexandrushkina NI,Zagorskaya GYa,Kireev II,Vanyushin BF

doi

10.1016/0014-5793(92)80033-d

keywords:

subject

Has Abstract

pub_date

1992-02-24 00:00:00

pages

109-12

issue

2-3

eissn

0014-5793

issn

1873-3468

journal_volume

298

pub_type

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