Fungal symbionts may modulate nitrate inhibitory effect on orchid seed germination
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F21%3A43903434" target="_blank" >RIV/60076658:12310/21:43903434 - isvavai.cz</a>
Alternative codes found
RIV/67985939:_____/21:00545034 RIV/00216208:11310/21:10432689
Result on the web
<a href="https://link.springer.com/article/10.1007%2Fs00572-021-01021-w" target="_blank" >https://link.springer.com/article/10.1007%2Fs00572-021-01021-w</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s00572-021-01021-w" target="_blank" >10.1007/s00572-021-01021-w</a>
Alternative languages
Result language
angličtina
Original language name
Fungal symbionts may modulate nitrate inhibitory effect on orchid seed germination
Original language description
Many orchid species are threatened, while some disappear from their natural habitats without obvious reasons. Eutrophication has been suggested as a possible factor and nitrate, which is able to suppress non-symbiotic orchid seed germination even at very low concentrations, and could pose a serious threat for natural orchid populations. Early ontogenesis of all orchids entirely depends on orchid mycorrhizal symbiosis, and at this initial mycoheterotrophic stage, many terrestrial green orchids associate with polyphyletic fungal symbionts (i.e., mycobionts), collectively called "rhizoctonias." We asked whether these fungi might also have some non-nutritional roles, i.e., whether they might confer resistance to eutrophication. To test this hypothesis, we co-cultivated seeds of the terrestrial orchid Dactylorhiza majalis with five rhizoctonias (two Tulasnella, two Ceratobasidium and one Serendipita isolate) at various ecologically meaningful nitrate concentrations (0 to 100 mg/L). With the exception of one Tulasnella isolate, all mycobionts supported the growth of protocorms and formed orchid mycorrhiza, i.e., intracellular hyphal pelotons, in the protocorms. Nitrate suppressed asymbiotic, as well as symbiotic, seed germination in all but one fungal treatment; the seeds co-cultivated with one of the Ceratobasidium isolates were indeed insensitive to nitrate. We conclude that nitrates also negatively affect symbiotic orchid germination, depending on the available compatible mycobionts. Thus, eutrophication with nitrate may decrease the number of orchid mycobionts capable of supporting seed germination.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10611 - Plant sciences, botany
Result continuities
Project
<a href="/en/project/GA18-11378S" target="_blank" >GA18-11378S: New insights into niche partitioning of coexisting terrestrial orchids: functional traits shaping orchid-fungus interactions</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Mycorrhiza
ISSN
0940-6360
e-ISSN
—
Volume of the periodical
31
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
231-241
UT code for WoS article
000611486000001
EID of the result in the Scopus database
2-s2.0-85099985181