Detailed Information on Publication Record
2009
Shoot heterogeneity in trees: Consequences of Patchy N availability and vascular transport
GLOSER, Vít, Pavel SEDLÁČEK and Colin ORIANSBasic information
Original name
Shoot heterogeneity in trees: Consequences of Patchy N availability and vascular transport
Name in Czech
Heterogenita nadzemí části u stromů: Důsledky heterogenní dostupnosti N a dálkového transportu
Authors
GLOSER, Vít (203 Czech Republic, guarantor), Pavel SEDLÁČEK (203 Czech Republic) and Colin ORIANS (840 United States of America)
Edition
Nova Acta Leopoldina Neue Folge, Halle, Deutsche Akademie der Naturforscher, 2009, 0369-5034
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10600 1.6 Biological sciences
Country of publisher
Germany
Confidentiality degree
není předmětem státního či obchodního tajemství
RIV identification code
RIV/00216224:14310/09:00029020
Organization unit
Faculty of Science
Keywords in English
sectorial xylem anatomy;patchy N availability;shoot heterogeneity
Tags
International impact, Reviewed
Změněno: 31/3/2010 12:31, doc. RNDr. Vít Gloser, Ph.D.
V originále
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.
In Czech
Zkoumána byla reakce jehličnanů na heterogenní dostupnost dusíku ke kořenům. Po 3 měsících kultivace byla zejména distribuce nově asimilovaného 15N v nadzemní části výrazně heterogenní. Spojení vodivých pletiv a redistribuce N v rostlině tedy nezajistily homogenní rozložení N pokud byla heterogenita dostupného N v substrátu vysoká.
Links
| GA522/04/0631, research and development project |
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| 1P05ME793, research and development project |
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