Consequences of nitrogen deficiency induced by low external N concentration and by patchy N supply in Picea abies and Thuja occidentalis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F09%3A00029093" target="_blank" >RIV/00216224:14310/09:00029093 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Consequences of nitrogen deficiency induced by low external N concentration and by patchy N supply in Picea abies and Thuja occidentalis

Popis výsledku v původním jazyce

We examined the responses of two coniferous species Picea abies and Thuja occidentalis to decreased nitrogen availability.Nitrogen availability was reduced either by lower N concentration in the nutrient solution or by a patchy supply of a high N concentration to only one side root isolated in a split-root setup. Low N availability resulted in lower specific leaf area and photosynthetic rate in Thuja. Photosynthetic nitrogen use efficiency, however, linearly decreased with increasing N content only in Thuja. Patchy N supply caused uneven distribution of newly acquired labeled nitrogen and total N but did not result in significantly greater heterogeneity in the rate of photosynthesis among branches both in Picea and in Thuja plants. Both examined species possess mechanisms that reduce adverse effects of patchy N supply and restricted nitrogen transport in xylem to some parts of crown on their photosynthetic carbon assimilation.

Název v anglickém jazyce

Consequences of nitrogen deficiency induced by low external N concentration and by patchy N supply in Picea abies and Thuja occidentalis

Popis výsledku anglicky

We examined the responses of two coniferous species Picea abies and Thuja occidentalis to decreased nitrogen availability.Nitrogen availability was reduced either by lower N concentration in the nutrient solution or by a patchy supply of a high N concentration to only one side root isolated in a split-root setup. Low N availability resulted in lower specific leaf area and photosynthetic rate in Thuja. Photosynthetic nitrogen use efficiency, however, linearly decreased with increasing N content only in Thuja. Patchy N supply caused uneven distribution of newly acquired labeled nitrogen and total N but did not result in significantly greater heterogeneity in the rate of photosynthesis among branches both in Picea and in Thuja plants. Both examined species possess mechanisms that reduce adverse effects of patchy N supply and restricted nitrogen transport in xylem to some parts of crown on their photosynthetic carbon assimilation.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

ED - Fyziologie

OECD FORD obor

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Projekt

<a href="/cs/project/GA522%2F04%2F0631" target="_blank" >GA522/04/0631: Modifikační vliv rozdílné architektury vodivých pletiv na využití dusíku u stromů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Trees - Structure and function

ISSN

0931-1890

e-ISSN

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Svazek periodika

23

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

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Kód UT WoS článku

000262538700001

EID výsledku v databázi Scopus

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