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Artículo

Differential auxin transport and accumulation in the stem base lead to profuse adventitious root primordia formation in the aerial roots (aer) mutant of tomato (Solanum lycopersicum L.)

Mignolli, FrancescoIcon ; Mariotti, Lorenzo; Picciarelli, Piero; Vidoz, María LauraIcon
Fecha de publicación: 02/2017
Editorial: Elsevier Gmbh
Revista: Journal of Plant Physiology
ISSN: 0176-1617
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Biológicas

Resumen

The aerial roots (aer) mutant of tomato is characterized by a profuse and precocious formation of adven-titious root primordia along the stem. We demonstrated that auxin is involved in the aer phenotype butruled out higher auxin sensitivity of mutant plants. Interestingly, polar auxin transport was altered in aer,as young seedlings showed a reduced response to an auxin transport inhibitor and higher expression ofauxin export carriers SlPIN1 and SlPIN3. An abrupt reduction in transcripts of auxin efflux and influx genesin older aer hypocotyls caused a marked deceleration of auxin transport in more mature tissues. Indeed,in 20 days old aer plants, the transport of labeled IAA was faster in apices than in hypocotyls, displayingan opposite trend in comparison to a wild type. In addition, auxin transport facilitators (SlPIN1, SlPIN4,SlLAX5) were more expressed in aer apices than in hypocotyls, suggesting that auxin moves faster fromthe upper to the lower part of the stem. Consequently, a significantly higher level of free and conjugatedIAA was found at the base of aer stems with respect to their apices. This auxin accumulation is likely thecause of the aer phenotype.
Palabras clave: Tomato , Aerial Roots Mutant , Adventitious Roots , Polar Auxin Transport , Iaa
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/29936
DOI: http://dx.doi.org/10.1016/j.jplph.2017.02.010
URL: http://www.sciencedirect.com/science/article/pii/S0176161717300627
Colecciones
Articulos(IBONE)
Articulos de INST.DE BOTANICA DEL NORDESTE (I)
Citación
Mignolli, Francesco; Mariotti, Lorenzo; Picciarelli, Piero; Vidoz, María Laura; Differential auxin transport and accumulation in the stem base lead to profuse adventitious root primordia formation in the aerial roots (aer) mutant of tomato (Solanum lycopersicum L.); Elsevier Gmbh; Journal of Plant Physiology; 213; 2-2017; 55-65
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