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New Insights Into the Activity of Apple Dihydrochalcone Phloretin: Disturbance of Auxin Homeostasis as Physiological Basis of Phloretin Phytotoxic Action
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SYSNO ASEP 0562133 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title New Insights Into the Activity of Apple Dihydrochalcone Phloretin: Disturbance of Auxin Homeostasis as Physiological Basis of Phloretin Phytotoxic Action Author(s) Smailagić, D. (RS)
Banjac, N. (RS)
Ninković, S. (RS)
Savić, J. (RS)
Ćosić, T. (RS)
Pěnčík, Aleš (UEB-Q) ORCID, RID, SAI
Ćalić, D. (RS)
Bogdanović, M. (RS)
Trajković, M. (RS)
Stanišić, M. (RS)Number of authors 10 Article number 875528 Source Title Frontiers in Plant Science. - : Frontiers Research Foundation - ISSN 1664-462X
Roč. 13, JUL 7 (2022)Number of pages 17 s. Language eng - English Country CH - Switzerland Keywords allelopathy ; ard ; auxin ; dihydrochalcones ; Malus × domestica Borkh. (apple) ; phloretin ; phytotoxicity ; polar auxin transport OECD category Plant sciences, botany Method of publishing Open access Institutional support UEB-Q - RVO:61389030 UT WOS 000831316000001 EID SCOPUS 85134519755 DOI 10.3389/fpls.2022.875528 Annotation Apple species are the unique naturally rich source of dihydrochalcones, phenolic compounds with an elusive role in planta, but suggested auto-allelochemical features related to “apple replant disease” (ARD). Our aim was to elucidate the physiological basis of the phytotoxic action of dihydrochalcone phloretin in the model plant Arabidopsis and to promote phloretin as a new prospective eco-friendly phytotoxic compound. Phloretin treatment induced a significant dose-dependent growth retardation and severe morphological abnormalities and agravitropic behavior in Arabidopsis seedlings. Histological examination revealed a reduced starch content in the columella cells and a serious disturbance in root architecture, which resulted in the reduction in length of meristematic and elongation zones. Significantly disturbed auxin metabolome profile in roots with a particularly increased content of IAA accumulated in the lateral parts of the root apex, accompanied by changes in the expression of auxin biosynthetic and transport genes, especially PIN1, PIN3, PIN7, and ABCB1, indicates the role of auxin in physiological basis of phloretin-induced growth retardation. The results reveal a disturbance of auxin homeostasis as the main mechanism of phytotoxic action of phloretin. This mechanism makes phloretin a prospective candidate for an eco-friendly bioherbicide and paves the way for further research of phloretin role in ARD. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2023 Electronic address https://doi.org/10.3389/fpls.2022.875528
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