Expression of ABA signalling genes and ABI5 protein levels in imbibed Sorghum bicolor caryopses with contrasting dormancy and at different developmental stages
Background and AimsPre-harvest sprouting susceptibility in grain sorghum (Sorghum bicolor) is related to low seed dormancy and reduced embryo sensitivity to inhibition of germination by abscisic acid (ABA). Intra-specific variability for pre-harvest sprouting might involve differential regulation of...
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2009
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03057364_v104_n5_p975_Rodriguez http://hdl.handle.net/20.500.12110/paper_03057364_v104_n5_p975_Rodriguez |
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paper:paper_03057364_v104_n5_p975_Rodriguez2023-06-08T15:30:49Z Expression of ABA signalling genes and ABI5 protein levels in imbibed Sorghum bicolor caryopses with contrasting dormancy and at different developmental stages Rodríguez, María Verónica Mendiondo, Guillermina Mónica Maskin, Laura Gudesblat, Gustavo Eduardo Iusem, Norberto Daniel ABI5 Abscisic acid Hormone signalling Pre-harvest sprouting Seed dormancy Sorghum bicolor abscisic acid phytohormone signal transducing adaptor protein vegetable protein abscisic acid developmental stage embryo gene expression harvesting hormone imbibition inhibition intraspecific variation protein seed dormancy sorghum article gene expression regulation genetics germination growth, development and aging physiology plant gene plant seed polymerase chain reaction sorghum Western blotting Abscisic Acid Adaptor Proteins, Signal Transducing Blotting, Western Gene Expression Regulation, Plant Genes, Plant Germination Plant Growth Regulators Plant Proteins Polymerase Chain Reaction Seeds Sorghum Sorghum bicolor Sorghum bicolor bicolor Background and AimsPre-harvest sprouting susceptibility in grain sorghum (Sorghum bicolor) is related to low seed dormancy and reduced embryo sensitivity to inhibition of germination by abscisic acid (ABA). Intra-specific variability for pre-harvest sprouting might involve differential regulation of ABA signalling genes.MethodsSorghum genes encoding homologues for ABA signalling components from other species (ABI5, ABI4, VP1, ABI1 and PKABA1) were studied at the transcriptional and protein level (ABI5) during grain imbibition for two sorghum lines with contrasting sprouting phenotypes and in response to hormones.Key ResultsTranscript levels of these genes and protein levels of ABI5 were higher in imbibed immature caryopses of the more dormant line. Dormancy loss was related to lower transcript levels of these genes and lower ABI5 protein levels in both genotypes. Exogenous ABA inhibited germination of isolated embryos but failed to prevent ABI5 rapid decrease supporting a role for the seed coat in regulating ABI5 levels.ConclusionsSeveral genes involved in ABA signalling are regulated differently in imbibed caryopses from two sorghum lines with contrasting pre-harvest sprouting response before - but not after - physiological maturity. A role for ABI5 in the expression of dormancy during grain development is discussed. Fil:Rodríguez, M.V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mendiondo, G.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Maskin, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Gudesblat, G.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Iusem, N.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03057364_v104_n5_p975_Rodriguez http://hdl.handle.net/20.500.12110/paper_03057364_v104_n5_p975_Rodriguez |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
ABI5 Abscisic acid Hormone signalling Pre-harvest sprouting Seed dormancy Sorghum bicolor abscisic acid phytohormone signal transducing adaptor protein vegetable protein abscisic acid developmental stage embryo gene expression harvesting hormone imbibition inhibition intraspecific variation protein seed dormancy sorghum article gene expression regulation genetics germination growth, development and aging physiology plant gene plant seed polymerase chain reaction sorghum Western blotting Abscisic Acid Adaptor Proteins, Signal Transducing Blotting, Western Gene Expression Regulation, Plant Genes, Plant Germination Plant Growth Regulators Plant Proteins Polymerase Chain Reaction Seeds Sorghum Sorghum bicolor Sorghum bicolor bicolor |
| spellingShingle |
ABI5 Abscisic acid Hormone signalling Pre-harvest sprouting Seed dormancy Sorghum bicolor abscisic acid phytohormone signal transducing adaptor protein vegetable protein abscisic acid developmental stage embryo gene expression harvesting hormone imbibition inhibition intraspecific variation protein seed dormancy sorghum article gene expression regulation genetics germination growth, development and aging physiology plant gene plant seed polymerase chain reaction sorghum Western blotting Abscisic Acid Adaptor Proteins, Signal Transducing Blotting, Western Gene Expression Regulation, Plant Genes, Plant Germination Plant Growth Regulators Plant Proteins Polymerase Chain Reaction Seeds Sorghum Sorghum bicolor Sorghum bicolor bicolor Rodríguez, María Verónica Mendiondo, Guillermina Mónica Maskin, Laura Gudesblat, Gustavo Eduardo Iusem, Norberto Daniel Expression of ABA signalling genes and ABI5 protein levels in imbibed Sorghum bicolor caryopses with contrasting dormancy and at different developmental stages |
| topic_facet |
ABI5 Abscisic acid Hormone signalling Pre-harvest sprouting Seed dormancy Sorghum bicolor abscisic acid phytohormone signal transducing adaptor protein vegetable protein abscisic acid developmental stage embryo gene expression harvesting hormone imbibition inhibition intraspecific variation protein seed dormancy sorghum article gene expression regulation genetics germination growth, development and aging physiology plant gene plant seed polymerase chain reaction sorghum Western blotting Abscisic Acid Adaptor Proteins, Signal Transducing Blotting, Western Gene Expression Regulation, Plant Genes, Plant Germination Plant Growth Regulators Plant Proteins Polymerase Chain Reaction Seeds Sorghum Sorghum bicolor Sorghum bicolor bicolor |
| description |
Background and AimsPre-harvest sprouting susceptibility in grain sorghum (Sorghum bicolor) is related to low seed dormancy and reduced embryo sensitivity to inhibition of germination by abscisic acid (ABA). Intra-specific variability for pre-harvest sprouting might involve differential regulation of ABA signalling genes.MethodsSorghum genes encoding homologues for ABA signalling components from other species (ABI5, ABI4, VP1, ABI1 and PKABA1) were studied at the transcriptional and protein level (ABI5) during grain imbibition for two sorghum lines with contrasting sprouting phenotypes and in response to hormones.Key ResultsTranscript levels of these genes and protein levels of ABI5 were higher in imbibed immature caryopses of the more dormant line. Dormancy loss was related to lower transcript levels of these genes and lower ABI5 protein levels in both genotypes. Exogenous ABA inhibited germination of isolated embryos but failed to prevent ABI5 rapid decrease supporting a role for the seed coat in regulating ABI5 levels.ConclusionsSeveral genes involved in ABA signalling are regulated differently in imbibed caryopses from two sorghum lines with contrasting pre-harvest sprouting response before - but not after - physiological maturity. A role for ABI5 in the expression of dormancy during grain development is discussed. |
| author |
Rodríguez, María Verónica Mendiondo, Guillermina Mónica Maskin, Laura Gudesblat, Gustavo Eduardo Iusem, Norberto Daniel |
| author_facet |
Rodríguez, María Verónica Mendiondo, Guillermina Mónica Maskin, Laura Gudesblat, Gustavo Eduardo Iusem, Norberto Daniel |
| author_sort |
Rodríguez, María Verónica |
| title |
Expression of ABA signalling genes and ABI5 protein levels in imbibed Sorghum bicolor caryopses with contrasting dormancy and at different developmental stages |
| title_short |
Expression of ABA signalling genes and ABI5 protein levels in imbibed Sorghum bicolor caryopses with contrasting dormancy and at different developmental stages |
| title_full |
Expression of ABA signalling genes and ABI5 protein levels in imbibed Sorghum bicolor caryopses with contrasting dormancy and at different developmental stages |
| title_fullStr |
Expression of ABA signalling genes and ABI5 protein levels in imbibed Sorghum bicolor caryopses with contrasting dormancy and at different developmental stages |
| title_full_unstemmed |
Expression of ABA signalling genes and ABI5 protein levels in imbibed Sorghum bicolor caryopses with contrasting dormancy and at different developmental stages |
| title_sort |
expression of aba signalling genes and abi5 protein levels in imbibed sorghum bicolor caryopses with contrasting dormancy and at different developmental stages |
| publishDate |
2009 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03057364_v104_n5_p975_Rodriguez http://hdl.handle.net/20.500.12110/paper_03057364_v104_n5_p975_Rodriguez |
| work_keys_str_mv |
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| _version_ |
1768546629942509568 |