Auxin-binding-protein antibodies and peptides influence stomatal opening and alter cytoplasmic pH

Previous work has shown that stomatal opening induced by indole-3-acetic acid (IAA) in epidermal strips of the orchid Paphiopedilum tonsum L. is preceded by a reduction in cytoplasmic pH (pHi) of the guard cells. We now report that Fab fragments of an auxin-agonist antibody (D16), directed against a...

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Veröffentlicht in:Planta 1998-08, Vol.205 (4), p.581-586
Hauptverfasser: Gehring, C.A, McConchie, R.M, Venis, M.A, Parish, R.W
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creator Gehring, C.A
McConchie, R.M
Venis, M.A
Parish, R.W
description Previous work has shown that stomatal opening induced by indole-3-acetic acid (IAA) in epidermal strips of the orchid Paphiopedilum tonsum L. is preceded by a reduction in cytoplasmic pH (pHi) of the guard cells. We now report that Fab fragments of an auxin-agonist antibody (D16), directed against a putative auxin-binding domain of the auxin-binding protein ABP1, induce stomatal opening and decrease guard-cell pHi, as monitored with the acetomethoxy ester of the ratiometric pH indicator Snarf-1. Similar activity was shown by a monoclonal antibody against the same domain. The C-terminal dodecapeptide, Pz152-163 of maize ABP1 (ABPzm1) induced guard-cell alkalinization and closed stomata, as did Fab fragments of a monoclonal antibody (MAC 256) recognising the C-terminal region of ABPzm1. By implicating, for the first time, an auxin-binding protein in mediation of an auxin-dependent physiological response, these findings strongly support an auxin-receptor role for ABP1.
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We now report that Fab fragments of an auxin-agonist antibody (D16), directed against a putative auxin-binding domain of the auxin-binding protein ABP1, induce stomatal opening and decrease guard-cell pHi, as monitored with the acetomethoxy ester of the ratiometric pH indicator Snarf-1. Similar activity was shown by a monoclonal antibody against the same domain. The C-terminal dodecapeptide, Pz152-163 of maize ABP1 (ABPzm1) induced guard-cell alkalinization and closed stomata, as did Fab fragments of a monoclonal antibody (MAC 256) recognising the C-terminal region of ABPzm1. By implicating, for the first time, an auxin-binding protein in mediation of an auxin-dependent physiological response, these findings strongly support an auxin-receptor role for ABP1.</description><subject>Agronomy. Soil science and plant productions</subject><subject>Animals</subject><subject>Antibodies</subject><subject>Antibodies - immunology</subject><subject>Antibodies, Monoclonal - immunology</subject><subject>Auxins</subject><subject>Binding Sites</subject><subject>Biological and medical sciences</subject><subject>Cell membranes</subject><subject>Corn</subject><subject>Cytoplasm</subject><subject>Economic plant physiology</subject><subject>epidermis</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Guard cells</subject><subject>Hydrogen-Ion Concentration</subject><subject>immunochemistry</subject><subject>indole acetic acid</subject><subject>Indoleacetic Acids - metabolism</subject><subject>Mice</subject><subject>Monoclonal antibodies</subject><subject>Paphiopedilum</subject><subject>Peptides - metabolism</subject><subject>Plant Growth Regulators</subject><subject>Plant physiology and development</subject><subject>plant proteins</subject><subject>Plant Proteins - immunology</subject><subject>Plant Proteins - metabolism</subject><subject>Proteins</subject><subject>Protoplasts</subject><subject>Receptors, Cell Surface - immunology</subject><subject>Receptors, Cell Surface - metabolism</subject><subject>Space life sciences</subject><subject>Stomata</subject><subject>stomatal movement</subject><subject>Water and solutes. 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Soil science and plant productions</topic><topic>Animals</topic><topic>Antibodies</topic><topic>Antibodies - immunology</topic><topic>Antibodies, Monoclonal - immunology</topic><topic>Auxins</topic><topic>Binding Sites</topic><topic>Biological and medical sciences</topic><topic>Cell membranes</topic><topic>Corn</topic><topic>Cytoplasm</topic><topic>Economic plant physiology</topic><topic>epidermis</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Guard cells</topic><topic>Hydrogen-Ion Concentration</topic><topic>immunochemistry</topic><topic>indole acetic acid</topic><topic>Indoleacetic Acids - metabolism</topic><topic>Mice</topic><topic>Monoclonal antibodies</topic><topic>Paphiopedilum</topic><topic>Peptides - metabolism</topic><topic>Plant Growth Regulators</topic><topic>Plant physiology and development</topic><topic>plant proteins</topic><topic>Plant Proteins - immunology</topic><topic>Plant Proteins - metabolism</topic><topic>Proteins</topic><topic>Protoplasts</topic><topic>Receptors, Cell Surface - immunology</topic><topic>Receptors, Cell Surface - metabolism</topic><topic>Space life sciences</topic><topic>Stomata</topic><topic>stomatal movement</topic><topic>Water and solutes. Absorption, translocation and permeability</topic><topic>Water relations, transpiration, stomata</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gehring, C.A</creatorcontrib><creatorcontrib>McConchie, R.M</creatorcontrib><creatorcontrib>Venis, M.A</creatorcontrib><creatorcontrib>Parish, R.W</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Planta</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gehring, C.A</au><au>McConchie, R.M</au><au>Venis, M.A</au><au>Parish, R.W</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Auxin-binding-protein antibodies and peptides influence stomatal opening and alter cytoplasmic pH</atitle><jtitle>Planta</jtitle><addtitle>Planta</addtitle><date>1998-08-01</date><risdate>1998</risdate><volume>205</volume><issue>4</issue><spage>581</spage><epage>586</epage><pages>581-586</pages><issn>0032-0935</issn><eissn>1432-2048</eissn><coden>PLANAB</coden><abstract>Previous work has shown that stomatal opening induced by indole-3-acetic acid (IAA) in epidermal strips of the orchid Paphiopedilum tonsum L. is preceded by a reduction in cytoplasmic pH (pHi) of the guard cells. We now report that Fab fragments of an auxin-agonist antibody (D16), directed against a putative auxin-binding domain of the auxin-binding protein ABP1, induce stomatal opening and decrease guard-cell pHi, as monitored with the acetomethoxy ester of the ratiometric pH indicator Snarf-1. Similar activity was shown by a monoclonal antibody against the same domain. The C-terminal dodecapeptide, Pz152-163 of maize ABP1 (ABPzm1) induced guard-cell alkalinization and closed stomata, as did Fab fragments of a monoclonal antibody (MAC 256) recognising the C-terminal region of ABPzm1. By implicating, for the first time, an auxin-binding protein in mediation of an auxin-dependent physiological response, these findings strongly support an auxin-receptor role for ABP1.</abstract><cop>Berlin</cop><pub>Springer-Verlag</pub><pmid>9684362</pmid><doi>10.1007/s004250050359</doi><tpages>6</tpages></addata></record>
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subjects Agronomy. Soil science and plant productions
Animals
Antibodies
Antibodies - immunology
Antibodies, Monoclonal - immunology
Auxins
Binding Sites
Biological and medical sciences
Cell membranes
Corn
Cytoplasm
Economic plant physiology
epidermis
Fundamental and applied biological sciences. Psychology
Guard cells
Hydrogen-Ion Concentration
immunochemistry
indole acetic acid
Indoleacetic Acids - metabolism
Mice
Monoclonal antibodies
Paphiopedilum
Peptides - metabolism
Plant Growth Regulators
Plant physiology and development
plant proteins
Plant Proteins - immunology
Plant Proteins - metabolism
Proteins
Protoplasts
Receptors, Cell Surface - immunology
Receptors, Cell Surface - metabolism
Space life sciences
Stomata
stomatal movement
Water and solutes. Absorption, translocation and permeability
Water relations, transpiration, stomata
title Auxin-binding-protein antibodies and peptides influence stomatal opening and alter cytoplasmic pH
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