Linked Life Data

16831835

Source:http://linkedlifedata.com/resource/pubmed/id/16831835

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
16
pubmed:dateCreated
2006-7-28
pubmed:abstractText
In flowering plants, male fertility depends on proper cell differentiation in the anther. However, relatively little is known about the genes that regulate anther cell differentiation and function. Here, we report the analysis of a new Arabidopsis male sterile mutant, dysfunctional tapetum1 (dyt1). The dyt1 mutant exhibits abnormal anther morphology beginning at anther stage 4, with tapetal cells that have excess and/or enlarged vacuoles and lack the densely stained cytoplasm typical of normal tapetal cells. The mutant meiocytes are able to complete meiosis I, but they do not have a thick callose wall; they often fail to complete meiotic cytokinesis and eventually collapse. DYT1 encodes a putative bHLH transcription factor and is strongly expressed in the tapetum from late anther stage 5 to early stage 6, and at a lower level in meiocytes. In addition, the level of DYT1 mRNA is reduced in the sporocyteless/nozzle (spl/nzz) and excess microsporocytes1/extra sporogenous cell (ems1/exs) mutants; together with the mutant phenotypes, this suggests that DYT1 acts downstream of SPL/NZZ and EMS1/EXS. RT-PCR results showed that the expression levels of many tapetum-preferential genes are reduced significantly in the dyt1 mutant, indicating that DYT1 is important for the expression of tapetum genes. Our results support the hypothesis that DYT1 is a crucial component of a genetic network that controls anther development and function.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0950-1991
pubmed:author
pubmed:issnType
Print
pubmed:volume
133
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3085-95
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed-meshheading:16831835-Amino Acid Sequence, pubmed-meshheading:16831835-Arabidopsis, pubmed-meshheading:16831835-Arabidopsis Proteins, pubmed-meshheading:16831835-Basic Helix-Loop-Helix Transcription Factors, pubmed-meshheading:16831835-Conserved Sequence, pubmed-meshheading:16831835-Fertility, pubmed-meshheading:16831835-Flowers, pubmed-meshheading:16831835-Gene Expression Regulation, Plant, pubmed-meshheading:16831835-Helix-Loop-Helix Motifs, pubmed-meshheading:16831835-Molecular Sequence Data, pubmed-meshheading:16831835-Nuclear Proteins, pubmed-meshheading:16831835-Phenotype, pubmed-meshheading:16831835-Protein Kinases, pubmed-meshheading:16831835-Repressor Proteins, pubmed-meshheading:16831835-Reverse Transcriptase Polymerase Chain Reaction, pubmed-meshheading:16831835-Transcription Factors
pubmed:year
2006
pubmed:articleTitle
Regulation of Arabidopsis tapetum development and function by DYSFUNCTIONAL TAPETUM1 (DYT1) encoding a putative bHLH transcription factor.
pubmed:affiliation
Department of Biology and the Huck Institutes of Life Sciences, the Pennsylvania State University, University Park, PA 16802, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't