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- W2122865142 abstract "Abstract Isoprene strengthens thylakoid membranes and scavenges stress‐induced oxidative species. The idea that isoprene production might also influence isoprenoid and phenylpropanoid pathways under stress conditions was tested. We used transgenic tobacco to compare physiological and biochemical traits of isoprene‐emitting ( IE ) and non‐emitting ( NE ) plants exposed to severe drought and subsequent re‐watering. Photosynthesis was less affected by drought in IE than in NE plants, and higher rates were also observed in IE than in NE plants recovering from drought. Isoprene emission was stimulated by mild drought. Under severe drought, isoprene emission declined, and levels of non‐volatile isoprenoids, specifically de‐epoxidated xanthophylls and abscisic acid ( ABA ), were higher in IE than in NE plants. Soluble sugars and phenylpropanoids were also higher in IE plants. After re‐watering, IE plants maintained higher levels of metabolites, but isoprene emission was again higher than in unstressed plants. We suggest that isoprene production in transgenic tobacco triggered different responses, depending upon drought severity. Under drought, the observed trade‐off between isoprene and non‐volatile isoprenoids suggests that in IE plants isoprene acts as a short‐term protectant, whereas non‐volatile isoprenoids protect against severe, long‐term damage. After drought, it is suggested that the capacity to emit isoprene might up‐regulate production of non‐volatile isoprenoids and phenylpropanoids, which may further protect IE leaves." @default.
- W2122865142 created "2016-06-24" @default.
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- W2122865142 date "2014-05-22" @default.
- W2122865142 modified "2023-10-16" @default.
- W2122865142 title "Isoprene production in transgenic tobacco alters isoprenoid, non-structural carbohydrate and phenylpropanoid metabolism, and protects photosynthesis from drought stress" @default.
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- W2122865142 doi "https://doi.org/10.1111/pce.12350" @default.
- W2122865142 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24738622" @default.
- W2122865142 hasPublicationYear "2014" @default.
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