Drought affects carbon partitioning into volatile organic compound biosynthesis in Scots pine needles

© 2021 The Authors. New Phytologist © 2021 New Phytologist Foundation.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 232(2021), 5 vom: 18. Dez., Seite 1930-1943
1. Verfasser: Kreuzwieser, Jürgen (VerfasserIn)
Weitere Verfasser: Meischner, Mirjam, Grün, Michel, Yáñez-Serrano, Ana Maria, Fasbender, Lukas, Werner, Christiane
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Pinus sylvestris carbon partitioning crosstalk drought position-specific isotope labelling terpenes volatile organic compounds (VOCs) Volatile Organic Compounds mehr... Carbon 7440-44-0
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520 |a The effect of drought on the interplay of processes controlling carbon partitioning into plant primary and secondary metabolisms, such as respiratory CO2 release and volatile organic compound (VOC) biosynthesis, is not fully understood. To elucidate the effect of drought on the fate of cellular C sources into VOCs vs CO2 , we conducted tracer experiments with 13 CO2 and position-specific 13 C-labelled pyruvate, a key metabolite between primary and secondary metabolisms, in Scots pine seedlings. We determined the stable carbon isotope composition of leaf exchanged CO2 and VOC. Drought reduced the emission of the sesquiterpenes α-farnesene and β-farnesene but did not affect 13 C-incorporation from 13 C-pyruvate. The labelling patterns suggest that farnesene biosynthesis partially depends on isopentenyl diphosphate crosstalk between chloroplasts and cytosol, and that drought inhibits this process. Contrary to sesquiterpenes, drought did not affect emission of isoprene, monoterpenes and some oxygenated compounds. During the day, pyruvate was used in the TCA cycle to a minor degree but was mainly consumed in pathways of secondary metabolism. Drought partly inhibited such pathways, while allocation into the TCA cycle increased. Drought caused a re-direction of pyruvate consuming pathways, which contributed to maintenance of isoprene and monoterpene production despite strongly inhibited photosynthesis. This underlines the importance of these volatiles for stress tolerance 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Pinus sylvestris 
650 4 |a carbon partitioning 
650 4 |a crosstalk 
650 4 |a drought 
650 4 |a position-specific isotope labelling 
650 4 |a terpenes 
650 4 |a volatile organic compounds (VOCs) 
650 7 |a Volatile Organic Compounds  |2 NLM 
650 7 |a Carbon  |2 NLM 
650 7 |a 7440-44-0  |2 NLM 
700 1 |a Meischner, Mirjam  |e verfasserin  |4 aut 
700 1 |a Grün, Michel  |e verfasserin  |4 aut 
700 1 |a Yáñez-Serrano, Ana Maria  |e verfasserin  |4 aut 
700 1 |a Fasbender, Lukas  |e verfasserin  |4 aut 
700 1 |a Werner, Christiane  |e verfasserin  |4 aut 
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773 1 8 |g volume:232  |g year:2021  |g number:5  |g day:18  |g month:12  |g pages:1930-1943 
856 4 0 |u http://dx.doi.org/10.1111/nph.17736  |3 Volltext 
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