VESELÁ, Barbora and 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, p. 910-918. ISBN 978-80-7375-836-3.
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Basic information
Original name THE EFFECT OF SIMULATED EUTROFICATION ON THE GROWTH AND MYCORRHIZAL SYMBIOSIS OF SERAPIAS LINGUA
Name (in English) THE EFFECT OF SIMULATED EUTROFICATION ON THE GROWTH AND MYCORRHIZAL SYMBIOSIS OF SERAPIAS LINGUA
Authors VESELÁ, Barbora and Milan BALÁŽ.
Edition BRNO, MENDELNET 2012, p. 910-918, 9 pp. 2012.
Publisher MENDEL UNIV BRNO, FAC AGRONOMY
Other information
Original language Czech
Type of outcome Proceedings paper
Field of Study 40101 Agriculture
Country of publisher Czech Republic
Confidentiality degree is not subject to a state or trade secret
Publication form electronic version available online
WWW URL
Organization unit Faculty of Science
ISBN 978-80-7375-836-3
UT WoS 000366461200104
Keywords (in Czech) Orchidaceae; mykorhizní symbióza; sehnutka krátkolistenná
Keywords in English Orchidaceae; euh-ofication; mycorrhizal symbiosis; Serapias lingua
Tags International impact, Reviewed
Changed by Changed by: Mgr. Marie Šípková, DiS., učo 437722. Changed: 26/8/2020 16:12.
Abstract
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.
Abstract (in English)
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.
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