Regrowth dynamics of Calamagrostis epigejos after defoliation
as affected by nitrogen availability.

J 2007

Regrowth dynamics of Calamagrostis epigejos after defoliation as affected by nitrogen availability.

GLOSER, Vít, Martina KOŠVANCOVÁ a Jan GLOSER

Základní údaje

Originální název

Regrowth dynamics of Calamagrostis epigejos after defoliation as affected by nitrogen availability.

Název česky

Dynamika obrůstání třtiny křovištní po defoliaci ovlivněná dostupností dusíku.

Autoři

GLOSER, Vít (203 Česká republika, garant), Martina KOŠVANCOVÁ (203 Česká republika) a Jan GLOSER (203 Česká republika)

Vydání

Biologia Plantarum, Dordrecht, KLUWER ACADEMIC PUBLISHERS, 2007, 0006-3134

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10600 1.6 Biological sciences

Stát vydavatele

Nizozemské království

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 1.259

Kód RIV

RIV/00216224:14310/07:00020289

Organizační jednotka

Přírodovědecká fakulta

UT WoS

000247412400015

Klíčová slova anglicky

nitrogen supply; regrowth; defoliation

Štítky

defoliation, nitrogen supply, REGROWTH

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 1. 12. 2007 20:12, doc. RNDr. Vít Gloser, Ph.D.

Anotace

ORIG CZ

V originále

Young plants of a rhizomatous grass Calamagrostis epigejos (L.) Roth were grown from seed in nutrient solutions containing nitrogen in concentrations 0.1, 1.0, and 10 mM. After six weeks of cultivation the plants were defoliated and changes in growth parameters and in content of storage compounds were measured in the course of regrowth under highly reduced nitrogen availability. Plants grown at higher nitrogen supply before defoliation had higher amount of all types of nitrogen storage compounds (nitrates, free amino acids, soluble proteins), which was beneficial for their regrowth rate, in spite of lower content of storage saccharides. Amino acids and soluble proteins from roots and stubble bases were the most important sources of storage compounds for regrowth of the shoot. Faster growth of plants with higher N content was mediated by greater leaf area expansion and greater number of leaves. In plants with lower contents of N compounds number of green leaves decreased after defoliation significantly and senescing leaves presumably served as N source for other growing organs. Results suggest that internal N reserves can support regrowth of plants after defoliation even under fluctuating external N availability. Faster regrowth of C. epigejos with more reserves was mediated mainly by changes in plant morphogenesis.

Česky

Výsledky experimentu ukazují že zásoby N mohou podporovat obrůstání rostlin třtiny po defoliaci i při kolísající dostupnosti N v prostředí.

Návaznosti

GA206/98/P268, projekt VaV

Název: Úloha dusíkatých zásobních látek v řízení růstových procesů třtiny křovištní (Calamagrostis epigejos)

Investor: Grantová agentura ČR, Úloha dusíkatých zásobních látek v řízení růstových procesů třtiny křovištní (Calamagrostis epigejos)

Citovat

GLOSER, Vít, Martina KOŠVANCOVÁ a Jan GLOSER. Regrowth dynamics of Calamagrostis epigejos after defoliation as affected by nitrogen availability. Biologia Plantarum. Dordrecht: KLUWER ACADEMIC PUBLISHERS, 2007, roč. 51, č. 3, s. 501-506. ISSN 0006-3134.

@article{719106,
   author = {Gloser, Vít and Košvancová, Martina and Gloser, Jan},
   article_location = {Dordrecht},
   article_number = {3},
   keywords = {nitrogen supply; regrowth; defoliation},
   language = {eng},
   issn = {0006-3134},
   journal = {Biologia Plantarum},
   title = {Regrowth dynamics of Calamagrostis epigejos after defoliation as affected by nitrogen availability.},
   volume = {51},
   year = {2007}
}

TY  - JOUR
ID  - 719106
AU  - Gloser, Vít - Košvancová, Martina - Gloser, Jan
PY  - 2007
TI  - Regrowth dynamics of Calamagrostis epigejos after defoliation as affected by nitrogen availability.
JF  - Biologia Plantarum
VL  - 51
IS  - 3
SP  - 501-506
EP  - 501-506
PB  - KLUWER ACADEMIC PUBLISHERS
SN  - 00063134
KW  - nitrogen supply
KW  - regrowth
KW  - defoliation
N2  - Young plants of a rhizomatous grass Calamagrostis epigejos (L.) Roth were grown from seed in nutrient solutions containing nitrogen in concentrations 0.1, 1.0, and 10 mM. After six weeks of cultivation the plants were defoliated and changes in growth parameters and in content of storage compounds were measured in the course of regrowth under highly reduced nitrogen availability. Plants grown at higher nitrogen supply before defoliation had higher amount of all types of nitrogen storage compounds (nitrates, free amino acids, soluble proteins), which was beneficial for their regrowth rate, in spite of lower content of storage saccharides. Amino acids and soluble proteins from roots and stubble bases were the most important sources of storage compounds for regrowth of the shoot. Faster growth of plants with higher N content was mediated by greater leaf area expansion and greater number of leaves. In plants with lower contents of N compounds number of green leaves decreased after defoliation significantly and senescing leaves presumably served as N source for other growing organs. Results suggest that internal N reserves can support regrowth of plants after defoliation even under fluctuating external N availability. Faster regrowth of C. epigejos with more reserves was mediated mainly by changes in plant morphogenesis.
ER  -

GLOSER, Vít, Martina KOŠVANCOVÁ a Jan GLOSER. Regrowth dynamics of Calamagrostis epigejos after defoliation as affected by nitrogen availability. \textit{Biologia Plantarum}. Dordrecht: KLUWER ACADEMIC PUBLISHERS, 2007, roč.~51, č.~3, s.~501-506. ISSN~0006-3134.

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