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dc.contributor.author
Mignolli, Francesco
dc.contributor.author
Mariotti, Lorenzo
dc.contributor.author
Lombardi, Lara
dc.contributor.author
Vidoz, María Laura
dc.contributor.author
Ceccarelli, Nello
dc.contributor.author
Picciarelli, Piero
dc.date.available
2016-06-10T19:14:06Z
dc.date.issued
2012-05
dc.identifier.citation
Mignolli, Francesco; Mariotti, Lorenzo; Lombardi, Lara; Vidoz, María Laura; Ceccarelli, Nello ; et al.; Tomato fruit development in the auxin-resistant dgt mutant is induced by pollination but not by auxin treatment; Elsevier; Journal of Plant Physiology; 169; 12; 5-2012; 1165-1172
dc.identifier.issn
0176-1617
dc.identifier.uri
http://hdl.handle.net/11336/6170
dc.description.abstract
In tomato (Solanum lycopersicum Mill.), auxin is believed to play a pivotal role in controlling fruit-set and early ovary growth. In this paper we investigated the effect of the reduced auxin sensitivity exhibited by the diageotropica (dgt) tomato mutant on ovary growth during early stage of fruit development. Here we show that in hand-pollinated ovaries fruit-set was not affected by the dgt lesion while fruit growth was reduced. This reduction was associated with a smaller cell size of mesocarp cells, with a lower mean C values and with a lower gene expression of the expansin gene LeExp2. When a synthetic auxin (4-CPA, chlorophenoxyacetic acid) was applied to the flowers of wild type plants, parthenocarpic ovary growth was induced. Onthe contrary, auxinapplicationto theflowers of dgtplants failed to induceparthenocarpy. Hand-pollinated ovaries of dgt contained higher levels of IAA compared to wild type and this was not associated with high transcript levels of genes encoding a key regulatory enzyme of IAA biosynthesis (ToFZYs) but with lower expression levels of GH3, a gene involved in the conjugation of IAA to amino acids. The expression of diverse Aux/IAA genes and SAUR (small auxin up-regulated RNA) was also altered in the dgt ovaries. The dgt lesion does not seem to affect specific Aux/IAA genes in terms of transcript occurrence but rather in terms of relative levels of expression. Transcript levels of Aux/IAA genes were up regulated in auxin-treated ovaries of wild-type but not in dgt. Together, our results suggest that dgt ovary cells are not able to sense and/or transduce the external auxin signal, whereas pollinated dgt ovary cells are able to detect the IAA present in fertilized ovules promoting fruit development.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Auxin Signalling
dc.subject
Diageotropica Mutant
dc.subject
Fruit Development
dc.subject
Indole-3 Acetic-Acid
dc.subject
Tomato
dc.subject.classification
Ciencias de las Plantas, Botánica
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Ciencias Biológicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Tomato fruit development in the auxin-resistant dgt mutant is induced by pollination but not by auxin treatment
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-06-07T16:17:51Z
dc.journal.volume
169
dc.journal.number
12
dc.journal.pagination
1165-1172
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Mignolli, Francesco. Universita Degli Studi Di Pisa; Italia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); Argentina
dc.description.fil
Fil: Mariotti, Lorenzo. Universita Degli Studi Di Pisa; Italia
dc.description.fil
Fil: Lombardi, Lara. Universita Degli Studi Di Pisa; Italia
dc.description.fil
Fil: Vidoz, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); Argentina
dc.description.fil
Fil: Ceccarelli, Nello . Universita Degli Studi Di Pisa; Italia
dc.description.fil
Fil: Picciarelli, Piero. Universita Degli Studi Di Pisa; Italia
dc.journal.title
Journal of Plant Physiology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jplph.2012.04.005
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jplph.2012.04.005
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0176161712001770
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