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Gibberellin-Abscisic Acid Balances during Arbuscular Mycorrhiza Formation in Tomato
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SYSNO ASEP 0463759 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Gibberellin-Abscisic Acid Balances during Arbuscular Mycorrhiza Formation in Tomato Author(s) Martin-Rodriguez, J.A. (ES)
Huertas, R. (ES)
Ho-Plagaro, T. (ES)
Ocampo, J.A. (ES)
Turečková, Veronika (UEB-Q) RID, ORCID
Tarkowská, Danuše (UEB-Q) RID, ORCID
Ludwig-Mueller, J. (DE)
Garcia-Garrido, J.M. (ES)Source Title Frontiers in Plant Science. - : Frontiers Research Foundation - ISSN 1664-462X
Roč. 7, AUG 23 (2016), s. 1273Number of pages 14 s. Language eng - English Country CH - Switzerland Keywords arbuscular mycorrhiza ; plant hormones ; gibberellins Subject RIV CB - Analytical Chemistry, Separation R&D Projects GA14-34792S GA ČR - Czech Science Foundation (CSF) LO1204 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UEB-Q - RVO:61389030 UT WOS 000381735800001 DOI 10.3389/fpls.2016.01273 Annotation Plant hormones have become appropriate candidates for driving functional plant mycorrhization programs, including the processes that regulate the formation of arbuscules in arbuscular mycorrhizal (AM) symbiosis. Here, we examine the role played by ABA/GA interactions regulating the formation of AM in tomato. We report differences in ABA and GA metabolism between control and mycorrhizal roots. Active synthesis and catabolism of ABA occur in AM roots. GAs level increases as a consequence of a symbiosis-induced mechanism that requires functional arbuscules which in turn is dependent on a functional ABA pathway. A negative interaction in their metabolism has been demonstrated. ABA attenuates GA-biosynthetic and increases GA-catabolic gene expression leading to a reduction in bioactive GAs. Vice versa, GA activated ABA catabolism mainly in mycorrhizal roots. The negative impact of GA; on arbuscule abundance in wild-type plants is partially offset by treatment with ABA and the application of a GA biosynthesis inhibitor rescued the arbuscule abundance in the ABA-deficient sitiens mutant. These findings, coupled with the evidence that ABA application leads to reduce bioactive GAi, support the hypothesis that ABA could act modifying bioactive GA level to regulate AM. Taken together, our results suggest that these hormones perform essential functions and antagonize each other by oppositely regulating AM formation in tomato roots. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2017
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