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A role for the auxin precursor anthranilic acid in root gravitropism via regulation of PIN-FORMED protein polarity and relocalisation in Arabidopsis

SM. Doyle, A. Rigal, P. Grones, M. Karady, DK. Barange, M. Majda, B. Pařízková, M. Karampelias, M. Zwiewka, A. Pěnčík, F. Almqvist, K. Ljung, O. Novák, S. Robert,

. 2019 ; 223 (3) : 1420-1432. [pub] 20190607

Jazyk angličtina Země Velká Británie

Typ dokumentu časopisecké články, práce podpořená grantem

Perzistentní odkaz   https://www.medvik.cz/link/bmc20006407

distribution of auxin within plant tissues is of great importance for developmental plasticity, including root gravitropic growth. Auxin flow is directed by the subcellular polar distribution and dynamic relocalisation of auxin transporters such as the PIN-FORMED (PIN) efflux carriers, which can be influenced by the main natural plant auxin indole-3-acetic acid (IAA). Anthranilic acid (AA) is an important early precursor of IAA and previously published studies with AA analogues have suggested that AA may also regulate PIN localisation. Using Arabidopsis thaliana as a model species, we studied an AA-deficient mutant displaying agravitropic root growth, treated seedlings with AA and AA analogues and transformed lines to over-produce AA while inhibiting its conversion to downstream IAA precursors. We showed that AA rescues root gravitropic growth in the AA-deficient mutant at concentrations that do not rescue IAA levels. Overproduction of AA affects root gravitropism without affecting IAA levels. Treatments with, or deficiency in, AA result in defects in PIN polarity and gravistimulus-induced PIN relocalisation in root cells. Our results revealed a previously unknown role for AA in the regulation of PIN subcellular localisation and dynamics involved in root gravitropism, which is independent of its better known role in IAA biosynthesis.

Citace poskytuje Crossref.org

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$a Doyle, Siamsa M $u Umeå Plant Science Centre (UPSC), Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences (SLU), 90183, Umeå, Sweden.
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$a A role for the auxin precursor anthranilic acid in root gravitropism via regulation of PIN-FORMED protein polarity and relocalisation in Arabidopsis / $c SM. Doyle, A. Rigal, P. Grones, M. Karady, DK. Barange, M. Majda, B. Pařízková, M. Karampelias, M. Zwiewka, A. Pěnčík, F. Almqvist, K. Ljung, O. Novák, S. Robert,
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$a distribution of auxin within plant tissues is of great importance for developmental plasticity, including root gravitropic growth. Auxin flow is directed by the subcellular polar distribution and dynamic relocalisation of auxin transporters such as the PIN-FORMED (PIN) efflux carriers, which can be influenced by the main natural plant auxin indole-3-acetic acid (IAA). Anthranilic acid (AA) is an important early precursor of IAA and previously published studies with AA analogues have suggested that AA may also regulate PIN localisation. Using Arabidopsis thaliana as a model species, we studied an AA-deficient mutant displaying agravitropic root growth, treated seedlings with AA and AA analogues and transformed lines to over-produce AA while inhibiting its conversion to downstream IAA precursors. We showed that AA rescues root gravitropic growth in the AA-deficient mutant at concentrations that do not rescue IAA levels. Overproduction of AA affects root gravitropism without affecting IAA levels. Treatments with, or deficiency in, AA result in defects in PIN polarity and gravistimulus-induced PIN relocalisation in root cells. Our results revealed a previously unknown role for AA in the regulation of PIN subcellular localisation and dynamics involved in root gravitropism, which is independent of its better known role in IAA biosynthesis.
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$a Rigal, Adeline $u Umeå Plant Science Centre (UPSC), Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences (SLU), 90183, Umeå, Sweden.
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$a Pařízková, Barbora $u Department of Chemical Biology and Genetics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, 783 71, Olomouc, Czech Republic. Laboratory of Growth Regulators, Institute of Experimental Botany at The Czech Academy of Sciences and Faculty of Science at Palacký University, 78371, Olomouc, Czech Republic.
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$a Karampelias, Michael $u Department of Plant Systems Biology, Vlaams Instituut voor Biotechnologie (VIB), 9052, Ghent, Belgium. Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052, Ghent, Belgium.
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$a Zwiewka, Marta $u Central European Institute of Technology (CEITEC), Masaryk University, 62500, Brno, Czech Republic.
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$a Almqvist, Fredrik $u Department of Chemical Biology and Genetics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, 783 71, Olomouc, Czech Republic.
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