Control of fruit patterning in Arabidopsis by INDEHISCENT.
The Arabidopsis seedpod opens through a spring-loaded mechanism known as pod shatter, which is essential for dispersal of the seeds. Here, we identify INDEHISCENT (IND), an atypical bHLH protein, that is necessary for fruit opening and is involved in patterning each of the three fruit cell types required for seed dispersal. Previous studies suggested that FRUITFULL (FUL), a member of the MADS-domain transcription factor family, is required for fruit growth since ful mutant fruit fail to undergo the dramatic enlargement that normally occurs after fertilization. Here we show, however, that FUL is not directly required for fruit elongation and instead is required to prevent ectopic activity of IND. Our molecular and genetic studies suggest a model for the regulatory interactions among the genes that control fruit development and the mechanism that results in the expression of IND in a narrow stripe of cells.
Liljegren
Sarah J
SJ
Section of Cell and Developmental Biology, Division of Biological Sciences, University of California, San Diego, 9500 Gilman Drive, Department 0116, La Jolla, CA 92093, USA.
Roeder
Adrienne H K
AH
Kempin
Sherry A
SA
Gremski
Kristina
K
Østergaard
Lars
L
Guimil
Sonia
S
Reyes
Daengnoy K
DK
Yanofsky
Martin F
MF
D017360:Arabidopsis / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism; D001483:Base Sequence / Q000235:genetics; D051792:Basic Helix-Loop-Helix Proteins; D002454:Cell Differentiation / Q000235:genetics; D018076:DNA, Complementary / Q000032:analysis / Q000235:genetics; D005638:Fruit / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D018506:Gene Expression Regulation, Plant / Q000235:genetics*; D018257:Helix-Loop-Helix Motifs / Q000235:genetics; D008969:Molecular Sequence Data; D009024:Morphogenesis / Q000235:genetics; D009154:Mutation / Q000235:genetics; D010641:Phenotype; D012098:Reproduction / Q000235:genetics; D012639:Seeds / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D014157:Transcription Factors / Q000235:genetics
D029681:Arabidopsis Proteins; D051792:Basic Helix-Loop-Helix Proteins; D018076:DNA, Complementary; D014157:Transcription Factors; C484035:INDEHISCENT protein, Arabidopsis