Publications by authors named "Julienne M-I Schweiger"
Article Synopsis
- Changes in CO concentrations impact plant growth and ecosystem functioning, but the adaptation of C photosynthesis to these changes needs more research.
- This study examines the relationship between the photosynthetic capacity of C plants (measured by maximum carboxylation rate and maximum electron transport rate) and species diversification over the last 80 million years.
- It finds positive links between photosynthetic capacity and both species diversification and speciation rates, and notes a shift in these relationships related to CO fluctuations about 30 million years ago, suggesting that historical low CO environments influenced the C photosynthetic pathway's evolution.
Partially mycoheterotrophic (PMH) plants obtain organic molecules from their mycorrhizal fungi in addition to carbon (C) fixed by photosynthesis. Some PMH orchids associated with ectomycorrhizal fungi have been shown to flexibly adjust the proportion of organic molecules obtained from fungi according to the habitat's light level. We hypothesise that Neottia ovata and Ophrys insectifera, two orchids associated with saprotrophic rhizoctonia fungi, are also able to increase uptake of organic molecules from fungi as irradiance levels decrease.
View Article and Find Full Text PDFThe climbing orchid Erythrorchis altissima is the largest mycoheterotroph in the world. Although previous in vitro work suggests that E. altissima has a unique symbiosis with wood-decaying fungi, little is known about how this giant orchid meets its carbon and nutrient demands exclusively via mycorrhizal fungi.
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