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The rolD oncogene promotes axillary bud and adventitious root meristems in Arabidopsis

The rolD oncogene promotes axillary bud and adventitious root meristems in Arabidopsis

Authors :
Falasca, Giuseppina
Altamura, Maria Maddalena
D'Angeli, Simone
Daniela, Zaghi
Costantino, Paolo
Mauro, Maria Luisa
Mauro, Ml
Source :
Plant Physiology and Biochemistry. 48:797-804
Publication Year :
2010
Publisher :
Elsevier BV, 2010.

Abstract

The expression of the Agrobacterium rhizogenes rolD oncogene induces precocious floral transition and strong flowering potential in tobacco and tomato. Here, we describe specific developmental effects induced by expression of rolD in Arabidopsis. We show that floral transition, as histologically monitored, occurred in rolD- plants earlier than in wild type, and this was coupled with a premature and enhanced formation of vegetative and reproductive axillary bud meristems. Furthermore, CYP79F1/SUPERSHOOT/BUSHY (SPS), a gene that negatively controls shoot branching in Arabidopsis and involved in glucosinolate metabolism and in cytokinin and auxin homeostasis, was down-regulated in rolD plants. The multiplication of post-embryonic meristems was also observed in the root system, with enhanced adventitious root formation. This result was confirmed by thin cell layer response in vitro, both under hormone-free and standard rooting conditions. However, the formation of lateral root meristems was not affected by rolD expression. Our results show that rolD accelerates and enhances specific post-embryonic meristems in Arabidopsis.

Details

ISSN :
09819428
Volume :
48
Database :
OpenAIRE
Journal :
Plant Physiology and Biochemistry
Accession number :
edsair.doi.dedup.....e1c1f25c0a43b6824f6f88a46bba6adb
Full Text :
https://doi.org/10.1016/j.plaphy.2010.06.002