D 2012

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

VESELÁ, Barbora and Milan BALÁŽ

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

Edition

BRNO, MENDELNET 2012, p. 910-918, 9 pp. 2012

Publisher

MENDEL UNIV BRNO, FAC AGRONOMY

Other information

Language

Czech

Type of outcome

Stať ve sborníku

Field of Study

40101 Agriculture

Country of publisher

Czech Republic

Confidentiality degree

není předmětem státního či obchodního tajemství

Publication form

electronic version available online

References:

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
Změněno: 26/8/2020 16:12, Mgr. Marie Šípková, DiS.

Abstract

ORIG EN

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.

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.