Differing Life-History Strategies of Two Mycoheterotrophic Orchid Species Associated with Leaf Litter- and Wood-Decaying Fungi
| Autor: | Tomohisa Yukawa, Miho Kubota, Shuichiro Tagane, Kenshi Tetsuka, Shuichiro Anan, Koichi Tone, Yuki Ogura-Tsujita, Yumi Yamashita |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
010603 evolutionary biology 01 natural sciences Life history theory Nutrient mycoheterotrophy Botany Orchidaceae lcsh:QH301-705.5 Nature and Landscape Conservation Erythrorchis Gastrodia confusa Ecology biology Host (biology) Ecological Modeling fungi food and beverages Plant litter biology.organism_classification Agricultural and Biological Sciences (miscellaneous) achlorophyllous plants Habitat lcsh:Biology (General) saprotrophic fungi mycorrhizal associations 010606 plant biology & botany |
| Zdroj: | Diversity, Vol 13, Iss 161, p 161 (2021) Diversity Volume 13 Issue 4 |
| ISSN: | 1424-2818 |
| Popis: | Mycoheterotrophic orchids depend completely on mycorrhizal fungi for their supply of carbon. The life-history traits of mycoheterotrophic plants (MHPs) can differ according to the characteristics of the associated mycorrhizal fungi. We compared the life-history strategies of two mycoheterotrophic orchids associated with wood- and leaf litter-decaying fungi over a maximum of six years of field monitoring. Seventy percent of the aboveground stems of Erythrorchis altissima, associated with wood-decaying fungi, disappeared from the host wood within two years after tagging, likely due to nutrient depletion. In contrast, Gastrodia confusa, associated with leaf litter-decaying fungi, occurred continuously (18 to 108 fruiting stalks) every year within a small-scale plot (12 × 45 m) for six years through seed and clonal propagation. Our results support the idea that mycoheterotrophic orchids associated with wood-decaying fungi disappear from their habitats due to nutrient depletion after their host wood has mostly decayed, while mycoheterotrophic orchids associated with leaf litter-decaying fungi can survive in small-scale habitats where substantial leaf fall regularly occurs to sustain the associated fungi. Our study provides basic information about a unique life-history strategy in MHPs associated with saprotrophic fungi and an understanding of the variation in life-history strategies among MHPs. |
| Databáze: | OpenAIRE |
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