Linked Life Data

14165309

Source:http://linkedlifedata.com/resource/pubmed/id/14165309

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
1964-12-1
pubmed:abstractText
Evidence has been cited which indicates that RNA and DNA are present in plastids and mitochondria. A multigenic apparatus in the plastid is deduced from the properties of bleached Euglena strains. Control mechanisms are present for the differentiation of proplastids to chloroplasts in Euglena and in higher plants, and for the differentiation of promitochondria to mitochondria in yeast. An operon-regulator mechanism for this control is suggested. A comparison of the hereditary cytoplasmic units of Euglena plastids and yeast mitochondria indicates cates great similarities in their properties. Because of these similarities in two unrelated organisms, we suggest that a DNA unit which is self-duplicating and which serves as a code for RNA is the basic hereditary unit of each plastid and mitochondrion. Much work must be done if this reasonable hypothesis is to be converted into well-founded theory. Some pressing problems await solution. We do not understand the nonrandom distribution of plastids in the mitotic divisions of variegated plants. A related unresolved problem is that of maternal inheritance, in which nonrandom segregation of cytoplasmic organelles occurs after fertilization, causing elimination of the organelles which are contributed by the male parent. How different are the gene components of one plastid in a cell from the gene components of other plastids in the same cell, and how do we test for these differences? Can gene exchange or recombination occur between organelles within the same cell? The answers to these questions may have to await development of more sophisticated techniques, such as the ability to transplant these organelles between different cells or to culture cellular organelles in vitro.
pubmed:keyword
http://linkedlifedata.com/resource/pubmed/keyword/CELL NUCLEUS, http://linkedlifedata.com/resource/pubmed/keyword/CHLOROPHYLL, http://linkedlifedata.com/resource/pubmed/keyword/CHLOROPLASTS, http://linkedlifedata.com/resource/pubmed/keyword/CHROMOSOMES, http://linkedlifedata.com/resource/pubmed/keyword/DNA, http://linkedlifedata.com/resource/pubmed/keyword/EUGLENA, http://linkedlifedata.com/resource/pubmed/keyword/EXPERIMENTAL LAB STUDY, http://linkedlifedata.com/resource/pubmed/keyword/Genetics, http://linkedlifedata.com/resource/pubmed/keyword/METABOLISM, http://linkedlifedata.com/resource/pubmed/keyword/MITOCHONDRIA, http://linkedlifedata.com/resource/pubmed/keyword/MUTATION, http://linkedlifedata.com/resource/pubmed/keyword/PHOTOSYNTHESIS, http://linkedlifedata.com/resource/pubmed/keyword/REVIEW, http://linkedlifedata.com/resource/pubmed/keyword/RNA, http://linkedlifedata.com/resource/pubmed/keyword/ULTRAVIOLET RAYS, http://linkedlifedata.com/resource/pubmed/keyword/YEASTS
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
OM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0036-8075
pubmed:author
pubmed:issnType
Print
pubmed:day
14
pubmed:volume
145
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
890-7
pubmed:dateRevised
2007-8-17
pubmed:meshHeading
pubmed:year
1964
pubmed:articleTitle
PLASTIDS AND MITOCHONDRIA: INHERITABLE SYSTEMS.
pubmed:publicationType
Journal Article, Review