Article (Scientific journals)
The phosphorylated pathway of serine biosynthesis is essential both for male gametophyte and embryo development and for root growth in Arabidopsis
Cascales - Miñana, Borja; Muñoz-Bertomeu, J.; Flores-Tornero, M. et al.
2013In Plant Cell, 25 (6), p. 2084-2101
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The Phosphorylated Pathway of Serine Biosynthesis Is Essential Both for Male Gametophyte and Embryo Development and for Root Growth in Arabidopsis.pdf
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Keywords :
Arabidopsis protein; PSP1 protein, Arabidopsis; Arabidopsis; Amino Acids; Arabidopsis Proteins; Biosynthetic Pathways; Citric Acid Cycle; Gene Expression Regulation, Developmental; Gene Expression Regulation, Plant; Glycolysis; Green Fluorescent Proteins; Immunoblotting; Microscopy, Electron, Transmission; Microscopy, Fluorescence; Mutation; Phosphoric Monoester Hydrolases; Phosphorylation; Plant Roots; Plants, Genetically Modified; Pollen; Reverse Transcriptase Polymerase Chain Reaction; Seeds; Serine
Abstract :
[en] This study characterizes the phosphorylated pathway of Ser biosynthesis (PPSB) in Arabidopsis thaliana by targeting phosphoserine phosphatase (PSP1), the last enzyme of the pathway. Lack of PSP1 activity delayed embryo development, leading to aborted embryos that could be classified as early curled cotyledons. The embryo-lethal phenotype of psp1 mutants could be complemented with PSP1 cDNA under the control of Pro35S (Pro35S:PSP1). However, this construct, which was poorly expressed in the anther tapetum, did not complement mutant fertility. Microspore development in psp1.1/psp1.1 Pro35S:PSP1 arrested at the polarized stage. The tapetum from these lines displayed delayed and irregular development. The expression of PSP1 in the tapetum at critical stages of microspore development suggests that PSP1 activity in this cell layer is essential in pollen development. In addition to embryo death and male sterility, conditional psp1 mutants displayed a shortroot phenotype, which was reverted in the presence of Ser. A metabolomic study demonstrated that the PPSB plays a crucial role in plant metabolism by affecting glycolysis, the tricarboxylic acid cycle, and the biosynthesis of amino acids. We provide evidence of the crucial role of the PPSB in embryo, pollen, and root development and suggest that this pathway is an important link connecting primary metabolism with development. © 2013 American Society of Plant Biologists. All rights reserved.
Disciplines :
Phytobiology (plant sciences, forestry, mycology...)
Author, co-author :
Cascales - Miñana, Borja ;  Departament de Biologia Vegetal, Facultat de Farmàcia, Universitat de València, Burjassot, Valencia, Spain
Muñoz-Bertomeu, J.;  Departament de Biologia Vegetal, Universitat de València, 46100 Burjassot (Valencia), Spain, Instituto de Biología Molecular y Celular de Plantas, Departamento Biotecnología, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Cientificas, C/Ingeniero Fausto Elio, 46022 Valencia, Spain
Flores-Tornero, M.;  Departament de Biologia Vegetal, Universitat de València, 46100 Burjassot (Valencia), Spain
Anoman, A. D.;  Departament de Biologia Vegetal, Universitat de València, 46100 Burjassot (Valencia), Spain
Pertusa, J.;  Departament de Biologia Funcional i Antropologia Física, Universitat de València, 46100 Valencia, Spain
Alaiz, M.;  Grupo de Componentes Bioactivos y Funcionales de Productos Vegetales, Departamento de Fisiología y Tecnología de Productos Vegetales, Instituto de la Grasa, Consejo Superior de Investigaciones Científicas, 41012 Seville, Spain
Osorio, S.;  Max Planck Institut für Molekulare Pflanzenphysiologie, 14476 Potsdam-Golm, Germany
Fernie, A. R.;  Max Planck Institut für Molekulare Pflanzenphysiologie, 14476 Potsdam-Golm, Germany
Segura, J.;  Departament de Biologia Vegetal, Universitat de València, 46100 Burjassot (Valencia), Spain
Ros, R.;  Departament de Biologia Vegetal, Universitat de València, 46100 Burjassot (Valencia), Spain
Language :
English
Title :
The phosphorylated pathway of serine biosynthesis is essential both for male gametophyte and embryo development and for root growth in Arabidopsis
Publication date :
2013
Journal title :
Plant Cell
ISSN :
1040-4651
eISSN :
1532-298X
Publisher :
American Society of Plant Biologists, Rockville, United States - Maryland
Volume :
25
Issue :
6
Pages :
2084-2101
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 08 January 2015

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