Linked Life Data

16183700

Source:http://linkedlifedata.com/resource/pubmed/id/16183700

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
2005-12-29
pubmed:abstractText
That plant dwarfism is caused by hormonal defects related to gibberellin and brassinosteroid has been well documented. Other contributing elements, however, have not been elucidated. Here, we report on one of the most severe dwarf mutants of rice, dwarf bamboo shoot 1 (dbs1). Most mutant plants died within 1 month after sowing, but a few (5.2%) survived and grew. Vacuolation enlarged cells in the leaf primordia and seminal root before abortion, which disrupted the organized cell files in these organs. Relative to the severe defects in shoot and root growth, the overall structure of the dbs1 embryo was almost normal. Similarly, initiation and organogenesis of the leaf primordia at the shoot apical meristem and those of the lateral root primordia at the root elongation zone occurred normally. These observations suggest that DBS1 is involved in the growth and development of organs but not in organ initiation or organogenesis. Positional cloning of DBS1 revealed that it encoded a NACK-type kinesin-like protein (OsNACK), homologous to the essential components of a mitogen-activated protein kinase cascade during plant cytokinesis. A BLAST search indicated that DBS1 was the only gene encoding the OsNACK-type protein in the rice genome, and the dbs1 mutant produced only small amounts of the translatable DBS1 mRNA. Thus, we conclude that the dbs1 mutation causes a severe defect in DBS1 function but does not completely shut it down. We discuss the leaky phenotype of dbs1 under the restricted functioning of OsNACK.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0032-0781
pubmed:author
pubmed:issnType
Print
pubmed:volume
46
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1934-43
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
The rice mutant dwarf bamboo shoot 1: a leaky mutant of the NACK-type kinesin-like gene can initiate organ primordia but not organ development.
pubmed:affiliation
Bioscience and Biotechnology Center, Nagoya University, Nagoya, Aichi, 464-8601 Japan. sazuka@agr.nagoya-u.ac.jp
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't