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Adaptive significance of age- and light-related variation in needle structure, photochemistry, and pigments in evergreen coniferous trees

cris.lastimport.scopus2025-10-23T06:55:30Z
cris.virtual.author-orcid0000-0001-8283-8779
cris.virtual.author-orcid0000-0003-4341-5399
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cris.virtual.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
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cris.virtualsource.author-orcid1925f9e9-b0be-433f-a409-271641cc7463
cris.virtualsource.author-orcid9861de92-2d0b-4d3f-ac43-d7ac7fc74706
cris.virtualsource.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtualsource.author-orcid62199eda-fe32-456c-9935-2e55f2101f3a
cris.virtualsource.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
dc.abstract.enEvergreen conifers thrive in challenging environments by maintaining multiple sets of needles, optimizing photosynthesis even under harsh conditions. This study aimed to investigate the relationships between needle structure, photosynthetic parameters, and age along the light gradient in the crowns of Abies alba, Taxus baccata, and Picea abies. We hypothesized that: (1) Needle structure, photochemical parameters, and photosynthetic pigment content correlate with needle age and light levels in tree crowns. (2) The photosynthetic capacity of ageing needles would decline and adjust to the increasing self-shading of branches. Our results revealed a non-linear increase in the leaf mass-to-area ratio. The maximum quantum yield of photosystem II photochemistrydecreased linearly with needle age without reaching levels indicative of photoinhibition. Decreased maximum electron transport rates (ETRmax) were linked to declining values of saturating photosynthetic photon flux density and increasing non-photochemical quenching of fluorescence (NPQ), indicating energy losses as heat. The chlorophyll a to chlorophyll b ratio linearlydecreased, suggesting older needles sustain high light capture efficiency. These findings offer new insights into the combined effects of needle ageing and self-shading on photochemistry and pigment content. This functional needle balance highlights the trade-off between the costs of long-term needle retention and the benefits of efficient resource utilization. In environments where airtemperature is less of a constraint on photosynthesis due to climate warming, evergreen coniferous trees could sustain or enhance their photosynthetic capacity. They can achieve this by shortening needle lifespan and retaining fewer cohorts of needles with higher ETRmax and lower NPQ compared to older needles.
dc.affiliationWydział Leśny i Technologii Drewna
dc.affiliationWydział Rolnictwa, Ogrodnictwa i Bioinżynierii
dc.affiliation.instituteKatedra Hodowli Lasu
dc.affiliation.instituteKatedra Fizjologii Roślin
dc.contributor.authorOluborode, James
dc.contributor.authorChadzinikolau, Tamara
dc.contributor.authorFormela-Luboińska, Magda
dc.contributor.authorYe, Zi-Piao
dc.contributor.authorRobakowski, Piotr
dc.date.access2025-03-05
dc.date.accessioned2025-03-05T08:24:18Z
dc.date.available2025-03-05T08:24:18Z
dc.date.copyright2024-12-20
dc.date.issued2025
dc.description.accesstimeat_publication
dc.description.bibliographyil., bibliogr.
dc.description.financepublication_nocost
dc.description.financecost0,00
dc.description.if2,9
dc.description.number1
dc.description.points100
dc.description.versionfinal_published
dc.description.volume163
dc.identifier.doi10.1007/s11120-024-01125-2
dc.identifier.eissn1573-5079
dc.identifier.issn0166-8595
dc.identifier.urihttps://sciencerep.up.poznan.pl/handle/item/2542
dc.identifier.weblinkhttps://link.springer.com/article/10.1007/s11120-024-01125-2
dc.languageen
dc.relation.ispartofPhotosynthesis Research
dc.relation.pagesart. 3
dc.rightsCC-BY-NC-ND
dc.sciencecloudsend
dc.share.typeOTHER
dc.subject.enadaptation to light
dc.subject.enleaf age
dc.subject.enphotosynthesis
dc.subject.enphotosynthetic pigments
dc.subject.enchlorophyll a fluorescence
dc.titleAdaptive significance of age- and light-related variation in needle structure, photochemistry, and pigments in evergreen coniferous trees
dc.typeJournalArticle
dspace.entity.typePublication
oaire.citation.issue1
oaire.citation.volume163