2015
DOI: 10.1007/s11032-015-0222-8
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A TILLING allele of the tomato Aux/IAA9 gene offers new insights into fruit set mechanisms and perspectives for breeding seedless tomatoes

Abstract: A TILLING allele of the tomato Aux/IAA9 gene offers new insights into fruit set mechanisms and perspectives for breeding seedless tomatoes. (2015) Molecular Breeding, vol. 35 (n° 1).

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Cited by 65 publications
(54 citation statements)
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“…6 ) further supports the positive role of auxin on sugar metabolism in tomato fruits. In agreement with our findings, fruits of an Aux/IAA9 frame-shift tomato mutant identified via TILLING-based screening exhibited an increased brix value compared to the WT in the fully ripe stage under either greenhouse or open-field conditions 57 . Therefore, although the direct regulation of tomato AGPase , LIN and SUT genes by light signaling-associated transcription factors also cannot be excluded due to the presence of HY5 and/or PIF bindings motifs in their promoter regions, it seems plausible to hypothesize that the reduced sugar content and transcript abundance of sink- and starch biosynthesis-related genes observed in early developing au fruits may be associated with the lower cytokinin and auxin signaling output detected in this PΦB-deficient mutant compared to the WT.…”
Section: Discussionsupporting
confidence: 91%
“…6 ) further supports the positive role of auxin on sugar metabolism in tomato fruits. In agreement with our findings, fruits of an Aux/IAA9 frame-shift tomato mutant identified via TILLING-based screening exhibited an increased brix value compared to the WT in the fully ripe stage under either greenhouse or open-field conditions 57 . Therefore, although the direct regulation of tomato AGPase , LIN and SUT genes by light signaling-associated transcription factors also cannot be excluded due to the presence of HY5 and/or PIF bindings motifs in their promoter regions, it seems plausible to hypothesize that the reduced sugar content and transcript abundance of sink- and starch biosynthesis-related genes observed in early developing au fruits may be associated with the lower cytokinin and auxin signaling output detected in this PΦB-deficient mutant compared to the WT.…”
Section: Discussionsupporting
confidence: 91%
“…Since tomato and other vegetables that could benefit from parthenocarpy are commonly propagated from seeds, hence only genetic sources for facultative parthenocarpy, where seeded fruits can develop following successful fertilization (Varoquaux et al, 2000), are of practical value. Presently, the most extensively characterized nontransgenic sources for facultative parthenocarpy in tomato are as follows: the three monogenic sources, pat (Beraldi et al, 2004; presumably a mutated Solyc03g120910, Selleri, 2011;Soressi and Salamini, 1975), procera (a mutated SlDELLA, Bassel et al, 2008) and entire (mutated SlAUX/IAA9, Mazzucato et al, 2015;Saito et al, 2011), all of which manifest undesired pleiotropic effects; and the three digenic sources, pat-2 (Hazra and Dutta, 2010;Vardy et al, 1989), IL5-1 and IVT-line 1 (Gorguet et al, 2008), all manifesting acceptable parthenocarpic phenotype; and the inferior oligogenic source pat-3/pat-4 (Nuez et al, 1986;Philouze and Maisonneuve, 1978). Despite the importance of this trait, exploitation of these mutants in breeding programmes is still rather limited.…”
Section: Introductionmentioning
confidence: 99%
“…For instance, fruits from the entire mutant are parthenocarpic due to the lack of SlIAA9 function. SlIAA9 belongs to Aux/IAA gene family, and its downregulation in entire indicates that SlIAA9 is important to mediate auxin responses during fruit set (Wang et al, 2005;Zhang et al, 2007;Mazzucato et al, 2015). Parthenocarpy in tomato pat mutants is associated with high levels of active GA in non-pollinated ovary due to misexpression of GA metabolism-associated genes (Fos et al, 2000;Olimpieri et al, 2007).…”
Section: Introductionmentioning
confidence: 99%