| Full text | |
| Author(s): |
Bianchetti, Ricardo Ernesto
[1]
;
Lira, Bruno Silvestre
[1]
;
Monteiro, Scarlet Santos
[1]
;
Demarco, Diego
[1]
;
Purgatto, Eduardo
[2]
;
Rothan, Christophe
[3]
;
Rossi, Magdalena
[1]
;
Freschi, Luciano
[1]
Total Authors: 8
|
| Affiliation: | [1] Univ Sao Paulo, Inst Biociencias, Dept Bot, Rua Matao 277, BR-05508900 Sao Paulo - Brazil
[2] Univ Sao Paulo, Fac Ciencias Farmaceut, Dept Alimentos & Nutr Expt, Ave Prof Lineu Prestes 580, BR-05508000 Sao Paulo - Brazil
[3] Univ Bordeaux, INRA, UMR Biol Fruit & Pathol 1332, F-33140 Villenave Dornon - France
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Journal of Experimental Botany; v. 69, n. 15, p. 3573-3586, JUL 10 2018. |
| Web of Science Citations: | 11 |
| Abstract | |
Light signaling has long been reported to influence fruit biology, although the regulatory impact of fruit-localized photoreceptors on fruit development and metabolism remains unclear. Studies performed in phytochrome (PHY)deficient tomato (Solanum lycopersicum) mutants suggest that SlPHYA, SlPHYB2, and to a lesser extent SlPHYB1 influence fruit development and ripening. By employing fruit-specific RNAi-mediated silencing of SlPHY genes, we demonstrated that fruit-localized SlPHYA and SlPHYB2 play contrasting roles in regulating plastid biogenesis and maturation in tomato. Our data revealed that fruit-localized SlPHYA, rather than SlPHYB1 or SlPHYB2, positively influences tomato plastid differentiation and division machinery via changes in both light and cytokinin signaling-related gene expression. Fruit-localized SlPHYA and SlPHYB2 were also shown to modulate sugar metabolism in early developing fruits via overlapping, yet distinct, mechanisms involving the co-ordinated transcriptional regulation of genes related to sink strength and starch biosynthesis. Fruit-specific SlPHY silencing also drastically altered the transcriptional profile of genes encoding light-repressor proteins and carotenoid-biosynthesis regulators, leading to reduced carotenoid biosynthesis during fruit ripening. Together, our data reveal the existence of an intricate PHY-hormonal interplay during fruit development and ripening, and provide conclusive evidence on the regulation of tomato quality by fruit-localized phytochromes. (AU) | |
| FAPESP's process: | 13/18056-2 - Interaction between light, hormonal and nitric oxide signaling during plastidial biogenesis and differentiation and nutraceutical compounds accumulation in tomato fruits |
| Grantee: | Luciano Freschi |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 16/01128-9 - Light and hormonal regulation of nutritional quality in Solanum lycopersicum |
| Grantee: | Maria Magdalena Rossi |
| Support Opportunities: | Research Projects - Thematic Grants |