Results 61 to 70 of about 2,162 (162)

Using Radon (222Rn) to Trace Variability in Greenhouse Gas Emission From Tree Stems Across Species, Seasons and Stem Heights

Ecohydrology, Volume 19, Issue 3, April/May 2026.
ABSTRACT Emissions from trees are an important component of the global methane (CH4) cycle, but their spatial origins (soil vs. in‐stem), transport pathways and environmental influences are not well constrained. To address these issues, this field study characterized spatial and temporal variability in stem emissions of biologically inert radon (222Rn),
Glory A. Iorliam, Kevan B. Moffett, Amr E. Keshta, J. Patrick Megonigal, Karen L. Knee   +4 more
wiley   +1 more source

Anatomi Jaringan Kayu Terserang Penyakit Lapuk Kayu Teras

Jurnal Manajemen Hutan Tropika, 2007
A study was undertaken to determine the anatomical structures of decaying heartwood in the stem part of Acacia mangium Willd where the branch stubs were found.
Simon Taka Nuhamara, Soetrisno Hadi
doaj  

Diterpenoid Diversity across Land Plants

Helvetica Chimica Acta, Volume 109, Issue 4, April 2026.
Here we bridge the knowledge of diterpene chemical diversity, biosynthesis, and evolution from nonvascular mosses and liverworts to that known from vascular plants. ABSTRACT The diverse array of diterpenoid natural products stems from the ease of manipulating the promiscuity of diterpene cyclases.
Anita Berg, Chad K. Papenfuhs, Amy E. Fraley   +2 more
wiley   +1 more source

A Generic Spinup Procedure to Initialize European Forest State Variables in Land Surface Models

Journal of Advances in Modeling Earth Systems, Volume 18, Issue 4, April 2026.
Abstract Forest structure is shaped by forest management practices, land‐use changes, and natural disturbances, including droughts, fires, storms, and insect outbreaks that drive species‐specific and size‐specific mortality. By modifying the carbon‐water‐energy exchanges with the atmosphere, it influences a stand's capacity to buffer against or succumb
Marine Remaud, Jina Jeong, Guillaume Marie, Omar Flores, Kim Naudts, Ana Peregon, Sebastiaan Luyssaert   +6 more
wiley   +1 more source

The influence of heartwood, sapwood and density on moisture fluctuations and crack formations of coated Norway spruce in outdoor exposure

Journal of Wood Science, 2019
The moisture sorption behaviour of wood strongly influences the durability of exterior-coated wood. Wood characteristics are known to influence the water sorption of uncoated wood.
T. Sjökvist, Å. Blom, M. E. P. Wålinder   +2 more
doaj   +1 more source

The Pathogenic White-Rot Fungus Heterobasidion parviporum Responds to Spruce Xylem Defense by Enhanced Production of Oxalic Acid

Molecular Plant-Microbe Interactions, 2012
Pathogen challenge of tree sapwood induces the formation of reaction zones with antimicrobial properties such as elevated pH and cation content. Many fungi lower substrate pH by secreting oxalic acid, its conjugate base oxalate being a reductant as well ...
Nina Elisabeth Nagy, Harald Kvaalen, Monica Fongen, Carl Gunnar Fossdal, Nicholas Clarke, Halvor Solheim, Ari M. Hietala   +6 more
doaj   +1 more source

Heartwood formation and prediction of heartwood parameters in Tectona grandis L.f. trees growing in forest plantations in Costa Rica

BOIS & FORETS DES TROPIQUES, 2018
The aim of this study was to establish variations in heartwood (percentage, diameter, radius, volume) in relation to tree height and sapwood thickness. The age at which heartwood formation begins and the maximum heartwood height in Tectona grandis trees were also investigated. Samples were taken from sixteen plantations in different zones of Costa Rica,
David Fernández-Sólis, Alexander Berrocal, Róger Moya   +2 more
openaire   +2 more sources

Can bark stripping cause red heartwood formation in beech stems?

iForest - Biogeosciences and Forestry, 2018
Injuries to standing trees caused by logging and the subsequent changes in biochemical composition and anatomy of affected tissues lead to wood quality loss, thus lowering the commercial value of roundwood. In this study, we investigated the influence of
Račko V, Mišíková O, Hlaváč P, Deáková V   +3 more
doaj   +1 more source

Evaluation of red sanders (Pterocarpus santalinus L.f.) germplasm for conservation and breeding

Genetic Resources
Pterocarpus santalinus L.f., an endangered species endemic to India’s Eastern Ghats, faces threats from illegal trade due to high demand and limited legal supply.
Kumbarahally Murthigowda Shivaprasad, Pendela Surath Kumar, Avula Kishore, Dinesh Kumar, Swapnen Pattanaik   +4 more
doaj   +1 more source

Heritability of Heartwood Formation in Pinus radiata D. Don [PDF]

Nature, 1965
AN important change which occurs in the wood of most trees as they grow older is the transformation of sapwood into heartwood. This change is associated with the death of the ray and vertical parenchyma cells, and definite modifications to the anatomy of both softwoods and hardwoods1.
openaire   +1 more source