Shoot heterogeneity in trees: Consequences of Patchy N availability and vascular transport

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F09%3A00029020" target="_blank" >RIV/00216224:14310/09:00029020 - isvavai.cz</a>
Result on the web
—
DOI - Digital Object Identifier
—

Result language
angličtina
Original language name
Shoot heterogeneity in trees: Consequences of Patchy N availability and vascular transport
Original language description
We examined responses of two gymnosperms, Picea abies and Thuja occidentalis, to two nitrogen treatments, homogenous and patchy. We quantified whether the distribution and abundance of newly assimilated N would be more heterogeneous when the nitrogen supply was patchy. Plants were grown in split root treatment and supplied with N only to one separated root. After 3 months of cultivation we quantified 15N content in the current year needles for each branch. We found that patchy N supply lead to significant increase in heterogeneity of N distribution within shoot of both species. Within the patchy treatment, the coefficient of variation in relative 15N was greater for lower branches than for upper branches indicating that the distribution of 15N was lessvariable toward the top of the plant. We discuss several mechanisms that may contribute to more homogeneous N distribution in upper branches of the shoot.
Czech name
—
Czech description
—

Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
EF - Botany
OECD FORD branch
—

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)