THE EFFECT OF SIMULATED EUTROFICATION ON THE GROWTH AND MYCORRHIZAL SYMBIOSIS OF SERAPIAS LINGUA

VESELÁ, Barbora a Milan BALÁŽ. THE EFFECT OF SIMULATED EUTROFICATION ON THE GROWTH AND MYCORRHIZAL SYMBIOSIS OF SERAPIAS LINGUA. Online. In Skarpa, P Ryant, P Cerkal, R Polak, O Kovarnik, J Vyskocil, I. MENDELNET 2012. BRNO: MENDEL UNIV BRNO, FAC AGRONOMY, 2012, s. 910-918. ISBN 978-80-7375-836-3.

Základní údaje

Originální název

THE EFFECT OF SIMULATED EUTROFICATION ON THE GROWTH AND MYCORRHIZAL SYMBIOSIS OF SERAPIAS LINGUA

Název anglicky

THE EFFECT OF SIMULATED EUTROFICATION ON THE GROWTH AND MYCORRHIZAL SYMBIOSIS OF SERAPIAS LINGUA

Autoři

VESELÁ, Barbora a Milan BALÁŽ

Vydání

BRNO, MENDELNET 2012, od s. 910-918, 9 s. 2012

Nakladatel

MENDEL UNIV BRNO, FAC AGRONOMY

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Další údaje

Jazyk

čeština

Typ výsledku

Stať ve sborníku

Obor

40101 Agriculture

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Forma vydání

elektronická verze "online"

Odkazy

URL

Organizační jednotka

Přírodovědecká fakulta

ISBN

978-80-7375-836-3

UT WoS

000366461200104

Klíčová slova česky

Orchidaceae; mykorhizní symbióza; sehnutka krátkolistenná

Klíčová slova anglicky

Orchidaceae; euh-ofication; mycorrhizal symbiosis; Serapias lingua

Příznaky

Mezinárodní význam, Recenzováno

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Anotace

V originále

Eutrofication is one of key factors affecting decline of orchid populations in nature. Although this phenomenon has been observed many times and is generally accepted, there is very little information about the mechanisms of eutrofication on terrestrial orchids of temperate or Mediterranean climatic zone. In principle, two modes of action may occur: direct toxic effect of higher nutrient content on orchids or their mycorrhizal fungi, and/or indirect effect mediated by altered competition with surrounding vegetation. I tested the significance of direct effect in a three-year lasting pot greenhouse experiment using Mediterranean orchid Serapias lingua. Indirect effect of eutrofication was excluded by omitting any co-cultivated plant species, eutrofication was simulated by the series of nutrient solutions. The most concentrated basic solution containing 6 mM N-NO3-, 2.4 mM N-NH4+, 2 mM P, 8 mM K, 2.6 mM Ca a 2 mM Mg was gradually diluted with distilled water in 1:1 ratio, in order to prepare 2, 4, 8, and 16x diluted treatments. No data suggesting direct negative effect of eutrofication on orchids were obtained. After the first growing season, no effect of simulated eutrofication on the ratio of fresh mass of tubers in 2007 and 2006 (FM2007/FM2006) was observed. The highest value of this coefficient was 7.79, SD=2.68, n=115. Positive effect of higher nutrient availability on the FM2008/FM2007 was observed after the second growing season, during which the nutrient demand was higher due to higher count of greater plants planted in individual pots. For example, the mean FM2008/FM2007 value of S. lingua treated with 16x diluted solution was 1.21 (SD=0.31, n=23), while for plants treated with undiluted basic solution was the mean 2.20 (SD=0.58, n=23). These results strongly support the opinion that indirect, by competition mediated effect of eutrofication on adult, photosynthezising plants is responsible cause decline of orchid population and the published evidence was discussed with this respect.

Anglicky

Eutrofication is one of key factors affecting decline of orchid populations in nature. Although this phenomenon has been observed many times and is generally accepted, there is very little information about the mechanisms of eutrofication on terrestrial orchids of temperate or Mediterranean climatic zone. In principle, two modes of action may occur: direct toxic effect of higher nutrient content on orchids or their mycorrhizal fungi, and/or indirect effect mediated by altered competition with surrounding vegetation. I tested the significance of direct effect in a three-year lasting pot greenhouse experiment using Mediterranean orchid Serapias lingua. Indirect effect of eutrofication was excluded by omitting any co-cultivated plant species, eutrofication was simulated by the series of nutrient solutions. The most concentrated basic solution containing 6 mM N-NO3-, 2.4 mM N-NH4+, 2 mM P, 8 mM K, 2.6 mM Ca a 2 mM Mg was gradually diluted with distilled water in 1:1 ratio, in order to prepare 2, 4, 8, and 16x diluted treatments. No data suggesting direct negative effect of eutrofication on orchids were obtained. After the first growing season, no effect of simulated eutrofication on the ratio of fresh mass of tubers in 2007 and 2006 (FM2007/FM2006) was observed. The highest value of this coefficient was 7.79, SD=2.68, n=115. Positive effect of higher nutrient availability on the FM2008/FM2007 was observed after the second growing season, during which the nutrient demand was higher due to higher count of greater plants planted in individual pots. For example, the mean FM2008/FM2007 value of S. lingua treated with 16x diluted solution was 1.21 (SD=0.31, n=23), while for plants treated with undiluted basic solution was the mean 2.20 (SD=0.58, n=23). These results strongly support the opinion that indirect, by competition mediated effect of eutrofication on adult, photosynthezising plants is responsible cause decline of orchid population and the published evidence was discussed with this respect.