Abstract
Cytokinins are essential hormones in plant development. Arabidopsis histidine-containing phosphotransfer proteins (AHPs) are mediators in a multistep phosphorelay pathway for cytokinin signaling. The exact role of AHP4 has not been elucidated. In this study, we demonstrated young flower-specific expression of AHP4, and compared AHP4-overexpressing (Ox) trangenic Arabidopsis lines and an ahp4 knock-out line. AHP4-Ox plants had reduced fertility due to a lack of secondary cell wall thickening in the anther endothecium and inhibition of IRREGURAR XYLEMs (IRXs) expression in young flowers. Conversely, ahp4 anthers had more lignified anther walls than the wild type, and increased IRXs expression. Our study indicates that AHP4 negatively regulates thickening of the secondary cell wall of the anther endothecium, and provides new insight into the role of cytokinins in formation of secondary cell walls via the action of AHP4.
| Original language | English |
|---|---|
| Pages (from-to) | 294-300 |
| Number of pages | 7 |
| Journal | Molecules and Cells |
| Volume | 25 |
| Issue number | 2 |
| Publication status | Published - 2008 Apr 30 |
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Keywords
- AHPs
- Anther dehiscence
- Arabidopsis
- Cytokinin
- Reduced fertility
- Secondary wall
ASJC Scopus subject areas
- Molecular Biology
- Genetics
- Cell Biology
Cite this
Arabidopsis histidine-containing phosphotransfer factor 4 (AHP4) negatively regulates secondary wall thickening of theanther endothecium during flowering. / Jung, Kwang Wook; Oh, Seung Ick; Kim, Yun Young; Yoo, Kyoung Shin; Cui, Mei Hua; Shin, Jeong Sheop.
In: Molecules and Cells, Vol. 25, No. 2, 30.04.2008, p. 294-300.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Arabidopsis histidine-containing phosphotransfer factor 4 (AHP4) negatively regulates secondary wall thickening of theanther endothecium during flowering
AU - Jung, Kwang Wook
AU - Oh, Seung Ick
AU - Kim, Yun Young
AU - Yoo, Kyoung Shin
AU - Cui, Mei Hua
AU - Shin, Jeong Sheop
PY - 2008/4/30
Y1 - 2008/4/30
N2 - Cytokinins are essential hormones in plant development. Arabidopsis histidine-containing phosphotransfer proteins (AHPs) are mediators in a multistep phosphorelay pathway for cytokinin signaling. The exact role of AHP4 has not been elucidated. In this study, we demonstrated young flower-specific expression of AHP4, and compared AHP4-overexpressing (Ox) trangenic Arabidopsis lines and an ahp4 knock-out line. AHP4-Ox plants had reduced fertility due to a lack of secondary cell wall thickening in the anther endothecium and inhibition of IRREGURAR XYLEMs (IRXs) expression in young flowers. Conversely, ahp4 anthers had more lignified anther walls than the wild type, and increased IRXs expression. Our study indicates that AHP4 negatively regulates thickening of the secondary cell wall of the anther endothecium, and provides new insight into the role of cytokinins in formation of secondary cell walls via the action of AHP4.
AB - Cytokinins are essential hormones in plant development. Arabidopsis histidine-containing phosphotransfer proteins (AHPs) are mediators in a multistep phosphorelay pathway for cytokinin signaling. The exact role of AHP4 has not been elucidated. In this study, we demonstrated young flower-specific expression of AHP4, and compared AHP4-overexpressing (Ox) trangenic Arabidopsis lines and an ahp4 knock-out line. AHP4-Ox plants had reduced fertility due to a lack of secondary cell wall thickening in the anther endothecium and inhibition of IRREGURAR XYLEMs (IRXs) expression in young flowers. Conversely, ahp4 anthers had more lignified anther walls than the wild type, and increased IRXs expression. Our study indicates that AHP4 negatively regulates thickening of the secondary cell wall of the anther endothecium, and provides new insight into the role of cytokinins in formation of secondary cell walls via the action of AHP4.
KW - AHPs
KW - Anther dehiscence
KW - Arabidopsis
KW - Cytokinin
KW - Reduced fertility
KW - Secondary wall
UR - http://www.scopus.com/inward/record.url?scp=44949258156&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=44949258156&partnerID=8YFLogxK
M3 - Article
C2 - 18413999
AN - SCOPUS:44949258156
VL - 25
SP - 294
EP - 300
JO - Molecules and Cells
JF - Molecules and Cells
SN - 1016-8478
IS - 2
ER -