Liesche, Johannes ORCID: 0000-0001-8753-4037, Vincent, Christopher ORCID: 0000-0003-0314-1231, Han, Xiaoyu ORCID: 0000-0001-7545-4259, Zwieniecki, Maciej ORCID: 0000-0002-3774-4455, Schulz, Alexander ORCID: 0000-0001-6796-3598, Gao, Chen ORCID: 0000-0003-4750-3900, Bravard, Rodrigue, Marker, Sean and Bohr, Tomas ORCID: 0000-0003-3620-7276 (2021). The mechanism of sugar export from long conifer needles. New Phytol., 230 (5). S. 1911 - 1925. HOBOKEN: WILEY. ISSN 1469-8137

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Abstract

The green leaves of plants are optimised for carbon fixation and the production of sugars, which are used as central units of carbon and energy throughout the plant. However, there are physical limits to this optimisation that remain insufficiently understood. Here, quantitative anatomical analysis combined with mathematical modelling and sugar transport rate measurements were used to determine how effectively sugars are exported from the needle-shaped leaves of conifers in relation to leaf length. Mathematical modelling indicated that phloem anatomy constrains sugar export in long needles. However, we identified two mechanisms by which this constraint is overcome, even in needles longer than 20 cm: (1) the grouping of transport conduits, and (2) a shift in the diurnal rhythm of sugar metabolism and export in needle tips. The efficiency of sugar transport in the phloem can have a significant influence on leaf function. The constraints on sugar export described here for conifer needles are likely to also be relevant in other groups of plants, such as grasses and angiosperm trees.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Liesche, JohannesUNSPECIFIEDorcid.org/0000-0001-8753-4037UNSPECIFIED
Vincent, ChristopherUNSPECIFIEDorcid.org/0000-0003-0314-1231UNSPECIFIED
Han, XiaoyuUNSPECIFIEDorcid.org/0000-0001-7545-4259UNSPECIFIED
Zwieniecki, MaciejUNSPECIFIEDorcid.org/0000-0002-3774-4455UNSPECIFIED
Schulz, AlexanderUNSPECIFIEDorcid.org/0000-0001-6796-3598UNSPECIFIED
Gao, ChenUNSPECIFIEDorcid.org/0000-0003-4750-3900UNSPECIFIED
Bravard, RodrigueUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Marker, SeanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bohr, TomasUNSPECIFIEDorcid.org/0000-0003-3620-7276UNSPECIFIED
URN: urn:nbn:de:hbz:38-596540
DOI: 10.1111/nph.17302
Journal or Publication Title: New Phytol.
Volume: 230
Number: 5
Page Range: S. 1911 - 1925
Date: 2021
Publisher: WILEY
Place of Publication: HOBOKEN
ISSN: 1469-8137
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
Plant SciencesMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/59654

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