| GLOSER, Vít, Pavel SEDLÁČEK and Colin ORIANS. Shoot heterogeneity in trees: Consequences of Patchy N availability and vascular transport. Nova Acta Leopoldina Neue Folge. Halle: Deutsche Akademie der Naturforscher, 2009, vol. 96, No 357, p. 135-141. ISSN 0369-5034. |
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@article{743442,
author = {Gloser, Vít and Sedláček, Pavel and Orians, Colin},
article_location = {Halle},
article_number = {357},
keywords = {sectorial xylem anatomy;patchy N availability;shoot heterogeneity},
language = {eng},
issn = {0369-5034},
journal = {Nova Acta Leopoldina Neue Folge},
title = {Shoot heterogeneity in trees: Consequences of Patchy N availability and vascular transport},
volume = {96},
year = {2009}
}
TY - JOUR
ID - 743442
AU - Gloser, Vít - Sedláček, Pavel - Orians, Colin
PY - 2009
TI - Shoot heterogeneity in trees: Consequences of Patchy N availability and vascular transport
JF - Nova Acta Leopoldina Neue Folge
VL - 96
IS - 357
SP - 135-141
EP - 135-141
PB - Deutsche Akademie der Naturforscher
SN - 03695034
KW - sectorial xylem anatomy;patchy N availability;shoot heterogeneity
N2 - 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 less variable toward the top of the plant. We discuss several mechanisms that may contribute to more homogeneous N distribution in upper branches of the shoot. We conclude that seasonal N recycling of N within plant did not result in homogeneous distribution of newly assimilated N when N supply is patchy.
ER -
GLOSER, Vít, Pavel SEDLÁČEK and Colin ORIANS. Shoot heterogeneity in trees: Consequences of Patchy N availability and vascular transport. \textit{Nova Acta Leopoldina Neue Folge}. Halle: Deutsche Akademie der Naturforscher, 2009, vol.~96, No~357, p.~135-141. ISSN~0369-5034.
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