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231225s2022 xx |||||o 00| ||eng c |
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|a 10.1111/nph.17833
|2 doi
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|a pubmed24n1108.xml
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|a (DE-627)NLM332548589
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|a (NLM)34716577
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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1 |
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|a Dani, Kaidala Ganesha Srikanta
|e verfasserin
|4 aut
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| 245 |
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|a Isoprene enhances leaf cytokinin metabolism and induces early senescence
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|c 2022
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 01.04.2022
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|a Date Revised 31.07.2022
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2021 The Authors. New Phytologist © 2021 New Phytologist Foundation.
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|a Isoprene, a major biogenic volatile hydrocarbon of climate-relevance, indisputably mitigates abiotic stresses in emitting plants. However functional relevance of constitutive isoprene emission in unstressed plants remains contested. Isoprene and cytokinins (CKs) are synthesized from a common substrate and pathway in chloroplasts. It was postulated that isoprene emission may affect CK-metabolism. Using transgenic isoprene-emitting (IE) Arabidopsis and isoprene nonemitting (NE) RNA-interference grey poplars (paired with respective NE and IE genotypes), the life of individual IE and NE leaves from emergence to abscission was followed under stress-free conditions. We monitored plant growth rate, aboveground developmental phenotype, modelled leaf photosynthetic energy status, quantified the abundance of leaf CKs, analysed Arabidopsis and poplar leaf transcriptomes by RNA-sequencing in presence and absence of isoprene during leaf senescence. Isoprene emission by unstressed leaves enhanced the abundance of CKs (isopentenyl adenine and its precursor) by > 200%, significantly upregulated genes coding for CK-synthesis, CK-signalling and CK-degradation, hastened plant development, increased chloroplast metabolic rate, altered photosynthetic energy status, induced early leaf senescence in both Arabidopsis and poplar. IE leaves senesced sooner even in decapitated poplars where source-sink relationships and hormone homeostasis were perturbed. Constitutive isoprene emission significantly accelerates CK-led leaf and organismal development and induces early senescence independent of growth constraints. Isoprene emission provides an early-riser evolutionary advantage and shortens lifecycle duration to assist rapid diversification in unstressed emitters
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a biogenic volatiles
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|a cytokinins
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|a hormones
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|a isoprene
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|a leaf senescence
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| 650 |
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|a signalling
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|a transcriptomics
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| 650 |
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|a unstressed plants
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| 650 |
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|a Butadienes
|2 NLM
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| 650 |
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|a Cytokinins
|2 NLM
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| 650 |
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|a Hemiterpenes
|2 NLM
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| 650 |
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|a Pentanes
|2 NLM
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| 650 |
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|a isoprene
|2 NLM
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| 650 |
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|a 0A62964IBU
|2 NLM
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| 700 |
1 |
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|a Pollastri, Susanna
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Pinosio, Sara
|e verfasserin
|4 aut
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| 700 |
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|a Reichelt, Michael
|e verfasserin
|4 aut
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| 700 |
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|a Sharkey, Thomas D
|e verfasserin
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|a Schnitzler, Jörg-Peter
|e verfasserin
|4 aut
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| 700 |
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|a Loreto, Francesco
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 234(2022), 3 vom: 30. Mai, Seite 961-974
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
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|g volume:234
|g year:2022
|g number:3
|g day:30
|g month:05
|g pages:961-974
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|u http://dx.doi.org/10.1111/nph.17833
|3 Volltext
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|d 234
|j 2022
|e 3
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|c 05
|h 961-974
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