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Strigolactones' effect on root growth and root-hair elongation may be mediated by auxin-efflux carriers
Year:
2010
Source of publication :
Journal of Plant Growth Regulation
Authors :
Barg, Rivka
;
.
Bhattacharya, Chaitali
;
.
Dor, Evgenia
;
.
Eliahu, Einat
;
.
Hershenhorn, Joseph
;
.
Joel, Daniel M.
;
.
Kapulnik, Yoram
;
.
Koltai, Hinanit
;
.
Lekalla, Sivarama
;
.
Resnick, Nathalie
;
.
Shealtiel, Hagit
;
.
Wininger, Smadar
;
.
Volume :
29
Co-Authors:
Koltai, H., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Dor, E., Department of Phytopathology and Weed Research, Newe-Ya'ar Research Center, PO Box 1021, Ramat-Yishay, Israel
Hershenhorn, J., Department of Phytopathology and Weed Research, Newe-Ya'ar Research Center, PO Box 1021, Ramat-Yishay, Israel
Joel, D.M., Department of Phytopathology and Weed Research, Newe-Ya'ar Research Center, PO Box 1021, Ramat-Yishay, Israel
Weininger, S., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Lekalla, S., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Shealtiel, H., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Bhattacharya, C., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Eliahu, E., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Resnick, N., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Barg, R., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Kapulnik, Y., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
129
To page:
136
(
Total pages:
8
)
Abstract:
Strigolactones are a new group of plant hormones that play a pivotal role in the regulation of aboveground plant architecture. However, the mechanisms governing their regulation of plant growth and development are unknown. We characterized the effect of a synthetic strigolactone (GR24) on tomato (Solanum lycopersicon) roots and present evidence for its relationship with the plant hormone auxin. We demonstrate that strigolactones interfere with the inhibitory effect of exogenously applied auxin on root elongation. This GR24-induced root elongation is conveyed via an increase in root cell length accompanied by a reduction in cell diameter, and it occurs despite strigolactone's reduction of cell division (detected as reduction of CYCB1;1 transcript). In addition, high concentrations of strigolactone lead to asymmetric root growth and inhibition of root-hair elongation. Exogenous application of NAA or IAA was unable to restore symmetric root growth and root-hair elongation in the presence of strigolactone. However, application of NPA, an auxin-efflux inhibitor, did restore root-hair elongation in the presence of strigolactone. Similarly, exogenous application of 2,4-D, a synthetic auxin that is not secreted by efflux carriers, restored root-hair elongation and symmetric growth in the presence of strigolactone. Nevertheless, 2,4-D was unable to prevent root elongation by strigolactones. Therefore, strigolactones' effect on root growth and root-hair elongation appears to be mediated via an effect on auxin-efflux carriers. Nevertheless, more than one mechanism may govern strigolactones' effect on root growth. © Springer Science+Business Media, LLC 2009.
Note:
Related Files :
Auxin
auxins
Cell elongation
Lycopersicon esculentum
plant hormones
root
Root hair
roots
Solanum
Strigolactone
Symmetric growth
Show More
Related Content
More details
DOI :
10.1007/s00344-009-9122-7
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
19364
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:28
Scientific Publication
Strigolactones' effect on root growth and root-hair elongation may be mediated by auxin-efflux carriers
29
Koltai, H., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Dor, E., Department of Phytopathology and Weed Research, Newe-Ya'ar Research Center, PO Box 1021, Ramat-Yishay, Israel
Hershenhorn, J., Department of Phytopathology and Weed Research, Newe-Ya'ar Research Center, PO Box 1021, Ramat-Yishay, Israel
Joel, D.M., Department of Phytopathology and Weed Research, Newe-Ya'ar Research Center, PO Box 1021, Ramat-Yishay, Israel
Weininger, S., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Lekalla, S., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Shealtiel, H., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Bhattacharya, C., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Eliahu, E., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Resnick, N., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Barg, R., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Kapulnik, Y., Institute of Plant Sciences, Agricultural Research Organization (ARO), The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Strigolactones' effect on root growth and root-hair elongation may be mediated by auxin-efflux carriers
Strigolactones are a new group of plant hormones that play a pivotal role in the regulation of aboveground plant architecture. However, the mechanisms governing their regulation of plant growth and development are unknown. We characterized the effect of a synthetic strigolactone (GR24) on tomato (Solanum lycopersicon) roots and present evidence for its relationship with the plant hormone auxin. We demonstrate that strigolactones interfere with the inhibitory effect of exogenously applied auxin on root elongation. This GR24-induced root elongation is conveyed via an increase in root cell length accompanied by a reduction in cell diameter, and it occurs despite strigolactone's reduction of cell division (detected as reduction of CYCB1;1 transcript). In addition, high concentrations of strigolactone lead to asymmetric root growth and inhibition of root-hair elongation. Exogenous application of NAA or IAA was unable to restore symmetric root growth and root-hair elongation in the presence of strigolactone. However, application of NPA, an auxin-efflux inhibitor, did restore root-hair elongation in the presence of strigolactone. Similarly, exogenous application of 2,4-D, a synthetic auxin that is not secreted by efflux carriers, restored root-hair elongation and symmetric growth in the presence of strigolactone. Nevertheless, 2,4-D was unable to prevent root elongation by strigolactones. Therefore, strigolactones' effect on root growth and root-hair elongation appears to be mediated via an effect on auxin-efflux carriers. Nevertheless, more than one mechanism may govern strigolactones' effect on root growth. © Springer Science+Business Media, LLC 2009.
Scientific Publication
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