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Mattiello L, Riaño-Pachón DM, Martins MCM, da Cruz LP, Bassi D, Marchiori PER, Ribeiro RV, Labate MTV, Labate CA, Menossi M. Physiological and transcriptional analyses of developmental stages along sugarcane leaf. BMC Plant Biol 2015; 15:300. [PMID: 26714767 PMCID: PMC4696237 DOI: 10.1186/s12870-015-0694-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 12/17/2015] [Indexed: 05/18/2023]
Abstract
BACKGROUND Sugarcane is one of the major crops worldwide. It is cultivated in over 100 countries on 22 million ha. The complex genetic architecture and the lack of a complete genomic sequence in sugarcane hamper the adoption of molecular approaches to study its physiology and to develop new varieties. Investments on the development of new sugarcane varieties have been made to maximize sucrose yield, a trait dependent on photosynthetic capacity. However, detailed studies on sugarcane leaves are scarce. In this work, we report the first molecular and physiological characterization of events taking place along a leaf developmental gradient in sugarcane. RESULTS Photosynthetic response to CO2 indicated divergence in photosynthetic capacity based on PEPcase activity, corroborated by activity quantification (both in vivo and in vitro) and distinct levels of carbon discrimination on different segments along leaf length. Additionally, leaf segments had contrasting amount of chlorophyll, nitrogen and sugars. RNA-Seq data indicated a plethora of biochemical pathways differentially expressed along the leaf. Some transcription factors families were enriched on each segment and their putative functions corroborate with the distinct developmental stages. Several genes with higher expression in the middle segment, the one with the highest photosynthetic rates, were identified and their role in sugarcane productivity is discussed. Interestingly, sugarcane leaf segments had a different transcriptional behavior compared to previously published data from maize. CONCLUSION This is the first report of leaf developmental analysis in sugarcane. Our data on sugarcane is another source of information for further studies aiming to understand and/or improve C4 photosynthesis. The segments used in this work were distinct in their physiological status allowing deeper molecular analysis. Although limited in some aspects, the comparison to maize indicates that all data acquired on one C4 species cannot always be easily extrapolated to other species. However, our data indicates that some transcriptional factors were segment-specific and the sugarcane leaf undergoes through the process of suberizarion, photosynthesis establishment and senescence.
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Affiliation(s)
- Lucia Mattiello
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol (CTBE), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Caixa Postal 6192, 13083-970, Campinas, SP, Brazil.
- Laboratório de Genoma Funcional, Instituto de Biologia, Universidade Estadual de Campinas Campinas, Caixa Postal 6109, Campinas, 13083-862, SP, Brazil.
| | - Diego Mauricio Riaño-Pachón
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol (CTBE), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Caixa Postal 6192, 13083-970, Campinas, SP, Brazil.
| | - Marina Camara Mattos Martins
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol (CTBE), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Caixa Postal 6192, 13083-970, Campinas, SP, Brazil.
| | - Larissa Prado da Cruz
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol (CTBE), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Caixa Postal 6192, 13083-970, Campinas, SP, Brazil.
| | - Denis Bassi
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol (CTBE), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Caixa Postal 6192, 13083-970, Campinas, SP, Brazil.
| | - Paulo Eduardo Ribeiro Marchiori
- Laboratório de Fisiologia de Plantas "Coaracy M. Franco", Centro de Pesquisa e Desenvolvimento em Ecofisiologia e Biofísica, Instituto Agronômico, Caixa Postal 28, Campinas, 13020-902, SP, Brazil.
| | - Rafael Vasconcelos Ribeiro
- Departamento de Biologia de Plantas, Universidade Estadual de Campinas, Caixa Postal 6109, Campinas, 13083-970, SP, Brazil.
| | - Mônica T Veneziano Labate
- Laboratório Max Feffer de Genética de Plantas, Departamento de Genética, Universidade de São Paulo, Caixa Postal 83, Piracicaba, 13400-970, SP, Brazil.
| | - Carlos Alberto Labate
- Laboratório Max Feffer de Genética de Plantas, Departamento de Genética, Universidade de São Paulo, Caixa Postal 83, Piracicaba, 13400-970, SP, Brazil.
| | - Marcelo Menossi
- Laboratório de Genoma Funcional, Instituto de Biologia, Universidade Estadual de Campinas Campinas, Caixa Postal 6109, Campinas, 13083-862, SP, Brazil.
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Martins MCM, Hejazi M, Fettke J, Steup M, Feil R, Krause U, Arrivault S, Vosloh D, Figueroa CM, Ivakov A, Yadav UP, Piques M, Metzner D, Stitt M, Lunn JE. Feedback inhibition of starch degradation in Arabidopsis leaves mediated by trehalose 6-phosphate. Plant Physiol 2013; 163:1142-63. [PMID: 24043444 PMCID: PMC3813640 DOI: 10.1104/pp.113.226787] [Citation(s) in RCA: 128] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Accepted: 09/16/2013] [Indexed: 05/18/2023]
Abstract
Many plants accumulate substantial starch reserves in their leaves during the day and remobilize them at night to provide carbon and energy for maintenance and growth. In this paper, we explore the role of a sugar-signaling metabolite, trehalose-6-phosphate (Tre6P), in regulating the accumulation and turnover of transitory starch in Arabidopsis (Arabidopsis thaliana) leaves. Ethanol-induced overexpression of trehalose-phosphate synthase during the day increased Tre6P levels up to 11-fold. There was a transient increase in the rate of starch accumulation in the middle of the day, but this was not linked to reductive activation of ADP-glucose pyrophosphorylase. A 2- to 3-fold increase in Tre6P during the night led to significant inhibition of starch degradation. Maltose and maltotriose did not accumulate, suggesting that Tre6P affects an early step in the pathway of starch degradation in the chloroplasts. Starch granules isolated from induced plants had a higher orthophosphate content than granules from noninduced control plants, consistent either with disruption of the phosphorylation-dephosphorylation cycle that is essential for efficient starch breakdown or with inhibition of starch hydrolysis by β-amylase. Nonaqueous fractionation of leaves showed that Tre6P is predominantly located in the cytosol, with estimated in vivo Tre6P concentrations of 4 to 7 µm in the cytosol, 0.2 to 0.5 µm in the chloroplasts, and 0.05 µm in the vacuole. It is proposed that Tre6P is a component in a signaling pathway that mediates the feedback regulation of starch breakdown by sucrose, potentially linking starch turnover to demand for sucrose by growing sink organs at night.
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Affiliation(s)
| | - Mahdi Hejazi
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | - Joerg Fettke
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | - Martin Steup
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | - Regina Feil
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | - Ursula Krause
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | - Stéphanie Arrivault
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | | | - Carlos María Figueroa
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | - Alexander Ivakov
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | | | - Maria Piques
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | - Daniela Metzner
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | - Mark Stitt
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
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