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- W2901791059 abstract "Abstract We recently discovered that β‐aminobutyric acid ( BABA ), a molecule known for its ability to prime defences in plants, is a natural plant metabolite. However, the role played by endogenous BABA in plants is currently unknown. In this study we investigated the systemic accumulation of BABA during pathogen infection, levels of BABA during plant growth and development and analysed mutants possibly involved in BABA transport or regulation. BABA was quantified by LC ‐ MS using an improved method adapted from a previously published protocol. Systemic accumulation of BABA was determined by analysing non‐infected leaves and roots after localised infections with Plectosphaerella cucumerina or Pseudomonas syringae pv. tomato ( Pst ) DC 3000 avrRpt2 . The levels of BABA were also quantified in different plant tissues and organs during normal plant growth, and in leaves during senescence. Mutants affecting amino acid transport ( aap6 , aap3 , prot1 and gat1 ), γ‐aminobutyric acid levels ( pop2 ) and senescence/defence ( cpr5‐2 ) were analysed. BABA was found to accumulate only locally after bacterial or fungal infection, with no detectable increase in non‐infected systemic plant parts. In leaves, BABA content increased during natural and induced senescence. Reproductive organs had the highest levels of BABA , and the mutant cpr5‐2 produced constitutively high levels of BABA . Synthetic BABA is highly mobile in the receiving plant, whereas endogenous BABA appears to be produced and accumulated locally in a tissue‐specific way. We discuss a possible role for BABA in age‐related resistance and propose a comprehensive model for endogenous and synthetic BABA ." @default.
- W2901791059 created "2018-11-29" @default.
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- W2901791059 date "2018-12-10" @default.
- W2901791059 modified "2023-10-17" @default.
- W2901791059 title "Accumulation patterns of endogenous β‐aminobutyric acid during plant development and defence in <i>Arabidopsis thaliana</i>" @default.
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- W2901791059 doi "https://doi.org/10.1111/plb.12940" @default.
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