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Title: Chromosomal replicons of higher plants

This brief discussion of replicons of higher plants offers a glimpse into the properties of chromosomal DNA replication. It gives evidence that the S phase of unrelated plant species is comprised of temporally ordered replicon families that increase in number with genome size. This orderly process, which assures a normal inheritance of genetic material to recipient daughter cells, is maintained at the level of replicon clusters by two mutually exclusive mechanisms, one involving the rate at which single replicons replicate their allotment of DNA, and another by means of the tempo-pause. The same two mechanisms are used by cells to alter the pattern of chromosomal DNA replication just prior to and during normal development. Both mechanisms are genetically determined and produce genetic effects when disturbed of disrupted by additional non-conforming DNAs. Further insight into how these two mechanisms operate requires more molecular information about the nature of replicons and the factors that govern when a replicon family replicates. Plant material is a rich and ideal source for this information just awaiting exploitation. 63 refs.
Authors:
Publication Date:
OSTI Identifier:
6713304
Report Number(s):
BNL-39310; CONF-870393-1
ON: DE87006915
DOE Contract Number:
AC02-76CH00016
Resource Type:
Conference
Resource Relation:
Conference: 18. Stadler genetics symposium: chromosome structure and function: the impact of new concepts, Columbia, MO, USA, 16 Mar 1987
Research Org:
Brookhaven National Lab., Upton, NY (USA)
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; DNA REPLICATION; MOLECULAR BIOLOGY; RIBOSOMAL RNA; GENES; TRANSCRIPTION; CELL CYCLE; CELL DIFFERENTIATION; GENE AMPLIFICATION; HETEROCHROMATIN; TRACER TECHNIQUES; TRITIUM COMPOUNDS; CHROMATIN; ISOTOPE APPLICATIONS; LABELLED COMPOUNDS; NUCLEIC ACID REPLICATION; NUCLEIC ACIDS; ORGANIC COMPOUNDS; RNA 550201* -- Biochemistry-- Tracer Techniques