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Gibberellins modulate auxin responses during tomato (Solanum lycopersicum L.) fruit development.
Physiol Plant. 2019 Apr; 165(4):768-779.PP

Abstract

In tomato, auxin and gibberellins (GAs) interact with each other to drive fruit growth and development. While the role of auxin in directing GA biosynthesis and signal is already known, very little information has been obtained about GA-mediated control of auxin signalling and response. Interestingly, we show that gibberellic acid (GA3) is able to modify the expression of several auxin signalling genes in the partial auxin-insensitive diageotropica (dgt) mutant, suggesting that GAs may override the control of DGT on auxin signal. Procera (pro) mutation, which confers a constitutively active GA signal, enhances the effects of exogenous auxin, indicating that PRO may act as a negative effector of auxin responses in fruits. Indeed, transcript modulation of some auxin/indole acetic acid and auxin response factor genes in auxin-treated dgt/pro fruits suggests that PRO controls their expression possibly bypassing DGT. It was also shown that GA biosynthesis, in response to auxin treatment, is largely controlled by DGT. It is therefore conceivable that the DGT-mediated increase of active GAs in auxin-treated or pollinated fruits would promote PRO degradation, which in turn activates part of the auxin signalling cascade.

Authors+Show Affiliations

Instituto de Botánica del Nordeste (IBONE), UNNE-CONICET, 3400 Corrientes, Argentina.Instituto de Botánica del Nordeste (IBONE), UNNE-CONICET, 3400 Corrientes, Argentina. Facultad de Ciencias Agrarias, UNNE, 3400 Corrientes, Argentina.Dipartimento di Scienze Agrarie, Alimentari e Agro-ambientali, Università di Pisa, 56124 Pisa, Italy.Dipartimento di Scienze Agrarie, Alimentari e Agro-ambientali, Università di Pisa, 56124 Pisa, Italy.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29888535

Citation

Mignolli, Francesco, et al. "Gibberellins Modulate Auxin Responses During Tomato (Solanum Lycopersicum L.) Fruit Development." Physiologia Plantarum, vol. 165, no. 4, 2019, pp. 768-779.
Mignolli F, Vidoz ML, Picciarelli P, et al. Gibberellins modulate auxin responses during tomato (Solanum lycopersicum L.) fruit development. Physiol Plant. 2019;165(4):768-779.
Mignolli, F., Vidoz, M. L., Picciarelli, P., & Mariotti, L. (2019). Gibberellins modulate auxin responses during tomato (Solanum lycopersicum L.) fruit development. Physiologia Plantarum, 165(4), 768-779. https://doi.org/10.1111/ppl.12770
Mignolli F, et al. Gibberellins Modulate Auxin Responses During Tomato (Solanum Lycopersicum L.) Fruit Development. Physiol Plant. 2019;165(4):768-779. PubMed PMID: 29888535.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Gibberellins modulate auxin responses during tomato (Solanum lycopersicum L.) fruit development. AU - Mignolli,Francesco, AU - Vidoz,Maria L, AU - Picciarelli,Piero, AU - Mariotti,Lorenzo, Y1 - 2018/07/30/ PY - 2017/12/26/received PY - 2018/06/04/revised PY - 2018/06/05/accepted PY - 2018/6/12/pubmed PY - 2019/4/30/medline PY - 2018/6/12/entrez SP - 768 EP - 779 JF - Physiologia plantarum JO - Physiol Plant VL - 165 IS - 4 N2 - In tomato, auxin and gibberellins (GAs) interact with each other to drive fruit growth and development. While the role of auxin in directing GA biosynthesis and signal is already known, very little information has been obtained about GA-mediated control of auxin signalling and response. Interestingly, we show that gibberellic acid (GA3) is able to modify the expression of several auxin signalling genes in the partial auxin-insensitive diageotropica (dgt) mutant, suggesting that GAs may override the control of DGT on auxin signal. Procera (pro) mutation, which confers a constitutively active GA signal, enhances the effects of exogenous auxin, indicating that PRO may act as a negative effector of auxin responses in fruits. Indeed, transcript modulation of some auxin/indole acetic acid and auxin response factor genes in auxin-treated dgt/pro fruits suggests that PRO controls their expression possibly bypassing DGT. It was also shown that GA biosynthesis, in response to auxin treatment, is largely controlled by DGT. It is therefore conceivable that the DGT-mediated increase of active GAs in auxin-treated or pollinated fruits would promote PRO degradation, which in turn activates part of the auxin signalling cascade. SN - 1399-3054 UR - https://www.unboundmedicine.com/medline/citation/29888535/Gibberellins_modulate_auxin_responses_during_tomato__Solanum_lycopersicum_L___fruit_development_ L2 - https://doi.org/10.1111/ppl.12770 DB - PRIME DP - Unbound Medicine ER -