Article
Multidisciplinary Sciences
Satoshi Ogawa, Songkui Cui, Alexandra R. F. White, David C. Nelson, Satoko Yoshida, Ken Shirasu
Summary: Parasitic plants use strigolactones as chemoattractants to locate and grow towards their hosts. The chemotropism to strigolactones is influenced by ammonium ion-rich conditions, resulting in reduced chemotropic ability. There are noticeable differences in the chemotropism to strigolactones between parasitic and non-parasitic plants in the Orobanchaceae family.
NATURE COMMUNICATIONS
(2022)
Article
Plant Sciences
Sofia I. F. Gomes, Miguel A. Fortuna, Jordi Bascompte, Vincent S. F. T. Merckx
Summary: This study investigates the interaction between mycoheterotrophic plants, which obtain carbon and nutrients from fungi, and arbuscular mycorrhizal networks. The research reveals that mycoheterotrophic plants interact with a subset of fungi detected in autotrophs, and fungi with a high overlap in autotrophic partners tend to interact with a similar set of mycoheterotrophs. The findings suggest that maintaining antagonistic interactions by targeting well-linked mutualistic fungi maximizes the carbon supply.
Article
Plant Sciences
David C. Nelson
Summary: Strigolactones are chemical signals that play a crucial role in the germination of parasitic plants that rely on hosts for survival. Understanding how parasites sense strigolactones and other host-derived stimulants is important in developing innovative chemical and biological control methods. Recent discoveries of strigolactone receptors in parasitic Orobanchaceae and their signaling mechanism provide valuable insights for further research in this field.
Article
Ecology
Yongge Yuan, Xinru Lin, Gelv Chen, Mark van Kleunen, Junmin Li
Summary: Parasitic plants can indirectly regulate the decomposition of organic materials by suppressing the effects of arbuscular mycorrhizal fungi (AMF) on decomposition. This study helps to unravel the mechanisms of a sophisticated hidden ecological process and is an important step forward in elucidating the roles of parasitic plants in soil nutrient cycling.
FUNCTIONAL ECOLOGY
(2023)
Article
Plant Sciences
Philipp Giesemann, Hanne N. Rasmussen, Gerhard Gebauer
Summary: About half of the chlorophyllous Paris-type species tested showed significant carbon enrichment from fungi, with seed plants exhibiting the highest carbon gain. These species are mainly herbaceous perennials thriving on shady forest ground.
Article
Plant Sciences
Kenji Suetsugu, Jun Matsubayashi
Summary: Some green orchids obtain carbon from both mycobionts and photosynthesis, while albino and variegated orchids have a higher dependency on mycobionts. A study found that all phenotypes of Platanthera hondoensis were associated dominantly with a non-ectomycorrhizal rhizoctonia from Ceratobasidiaceae. Regression analysis revealed a positive relationship between foliar chlorophyll concentration and the degree of mycoheterotrophy. This study suggests that orchids can dynamically adjust fungal exploitation in response to photosynthetic carbon levels, and non-ectomycorrhizal rhizoctonia may be the most common mycorrhizal partner for orchids.
JOURNAL OF EXPERIMENTAL BOTANY
(2022)
Review
Agronomy
Francisco J. Soto-Cruz, Jesus G. Zorrilla, Carlos Rial, Rosa M. Varela, Jose M. G. Molinillo, Jose M. Igartuburu, Francisco A. Macias
Summary: Strigolactones (SLs) are a prime example of allelochemicals that affect the germination of parasitic plants and the growth of symbiotic arbuscular mycorrhizal fungi. Research on SLs is complex but shows great potential for agricultural applications.
Article
Plant Sciences
Yuan-Yuan Li, Margaux Boeraeve, Yu-Hsiu Cho, Hans Jacquemyn, Yung- Lee
Summary: Mycorrhizal associations play a crucial role in orchid germination and seedling establishment, potentially impacting the distribution and abundance of orchids in natural conditions. The mycoheterotrophic orchid Gastrodia confusoides displays random aboveground spatial patterns of distribution within bamboo forests, possibly due to the scattered distribution of litter-decaying fungi. Our study provides evidence that the abundance of litter-decaying fungi varies randomly within the bamboo forest and independently from G. confusoides adults.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Taiki Suzuki, Michio Kuruma, Yoshiya Seto
Summary: Root parasitic plants cause significant damage to crop production, and using strigolactone (SL) analogs as suicidal germination inducers is an effective strategy. By developing a series of new SL analogs derived from cinnamic acid (CA), it was found that the cis-CA-derived analogs had stronger seed germination-inducing activity for root parasitic plants compared to the trans-CA-derived analogs, and introducing a substitution at the C-4 position increased their activity. Moreover, the cis-CA-derived SL analogs interacted more effectively with SL receptor proteins and promoted the growth of Arabidopsis.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Chemistry, Medicinal
Jiming Chen, David C. Nelson, Diwakar Shukla
Summary: Parasitic weeds like Striga cause significant losses in agricultural productivity. The activation mechanism of the strigolactone receptor remains unclear. Through molecular dynamics simulations, researchers discover that ligand hydrolysis enhances the activation of the receptor and the closing of the binding pocket is the main barrier to activation.
JOURNAL OF CHEMICAL INFORMATION AND MODELING
(2022)
Article
Plant Sciences
Ken Tokuhara, Hiroyuki Sato, Atsushi Abe, Masahiro Mii
Summary: The aim of this study was to establish an ex-situ conservation method for Gastrochilus japonicus using media with defined substances without plant growth regulators. The results showed that New Dogashima medium supplemented with 29.2 mM trehalose was suitable for seed germination and subsequent protocorm development. Moreover, ND medium containing 58.4 mM sucrose and 1 g/l activated charcoal was favorable for the plantlet growth after leaf induction from protocorms.
PLANT GROWTH REGULATION
(2023)
Article
Plant Sciences
Joao Gabriel Barbosa Braga, Candido Barreto de Novais, Priscila Pereira Diniz, Osnar Obede da Silva Aragao, Orivaldo Jose Saggin Junior, Ederson da Conceicao Jesus
Summary: Some plant species have evolved a mycoheterotrophic lifestyle, in which they rely on arbuscular mycorrhizal fungi (AMF) for carbon supply instead of photosynthesis. This study focused on Voyriella parviflora, a mycoheterotrophic species in the Gentianaceae family found in tropical regions like the Amazon basin. DNA analysis revealed that V. parviflora showed a preference for a specific lineage of the Glomus genus, which was distinct from a previously identified lineage associated with this species. This study highlights the importance of using culture-independent approaches to understand the symbiotic association between AMF and mycoheterotrophic plants.
Article
Plant Sciences
Silvia Perotto, Raffaella Balestrini
Summary: This article summarizes recent data on nutrient transfer in orchid and arbuscular mycorrhiza, and compares the development and function of fungal structures formed in these symbioses, outlining differences and similarities. Unexpected similarities in intracellular mycorrhizal fungal structures observed in orchids and mycoheterotrophic plants forming arbuscular mycorrhiza are described. The article speculates that these similarities may be a result of convergent evolution of mycorrhizal types in mycoheterotrophic plants and highlights knowledge gaps and new research directions.
Article
Plant Sciences
Benjamin Feller, Martin Dancak, Michal Hrones, Michal Sochor, Kenji Suetsugu, Stephan Imhof
Summary: This study reveals the root anatomy and mycorrhizal pattern of eight mycoheterotrophic Thismia spp., showing different hyphal shapes in separate tissue compartments. The differences in anatomy and colonization pattern among species can be seen as an evolutionary series towards increasing mycorrhizal complexity. The study emphasizes the relevance of structural traits for mycorrhizae.
Article
Horticulture
Xinzhen Gao, Yu Wang, Die Deng, Yinling Luo, Shicheng Shao, Yan Luo
Summary: In this study, the process of protocorm development of the endangered epiphytic orchid, Dendrobium chrysotoxum, during symbiotic germination was investigated. It was found that protocorm development is controlled by the embryo, which determines the structure and function of the protocorm. These findings provide important insights for further research on orchid-fungi symbiosis and orchid evolution.
Article
Plant Sciences
Hanne N. Rasmussen, Kingsley W. Dixon, Jana Jersakova, Tamara Tesitelova
Review
Plant Sciences
Hanne N. Rasmussen, Finn N. Rasmussen
BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
(2018)
Article
Plant Sciences
S. T. Barsberg, Y. -I. Lee, H. N. Rasmussen
SEED SCIENCE RESEARCH
(2017)
Article
Plant Sciences
Soren Barsberg, Hanne N. Rasmussen, Nete Kodahl
AMERICAN JOURNAL OF BOTANY
(2013)
Article
Biodiversity Conservation
Henrik A. E. Pedersen, Hanne N. Rasmussen, Imalka M. Kahandawala, Michael F. Fay
CONSERVATION GENETICS
(2012)
Article
Plant Sciences
Hanne N. Rasmussen, Bjarke Veierskov, Jens Hansen-Moller, Rikke Norbaek
JOURNAL OF PLANT GROWTH REGULATION
(2010)
Editorial Material
Plant Sciences
Hanne N. Rasmussen, Thomas Nord-Larsen, Eric Steen Hansen, Guillaume Hoareau
Article
Forestry
Hanne N. Rasmussen, Martin Jensen, John Frampton, Jens Hansen-Moller, Ulrik Brauner Nielsen
Article
Plant Sciences
Philipp Giesemann, Hanne N. Rasmussen, Heiko T. Liebel, Gerhard Gebauer
Article
Plant Sciences
Hanne Marie Ellegard Larsen, Eric Steen Hansen, Thomas Nord-Larsen, Hanne Nina Rasmussen
Article
Plant Sciences
Philipp Giesemann, Hanne N. Rasmussen, Gerhard Gebauer
Summary: About half of the chlorophyllous Paris-type species tested showed significant carbon enrichment from fungi, with seed plants exhibiting the highest carbon gain. These species are mainly herbaceous perennials thriving on shady forest ground.
Article
Plant Sciences
Agustina Ventre Lespiaucq, Hans Jacquemyn, Hanne N. Rasmussen, Marcos Mendez
Summary: This paper presents a classification of temporal turnover events in biotic interactions involving plants, using orchid mycorrhiza as a study model to demonstrate the commonality of temporal changes. The study discusses the conditions under which temporal turnover of fungal symbiont is expected, provides research questions and technical challenges for future studies, and explores the potential application of the framework to other types of biotic interactions.
Article
Mycology
Hanne Marie Ellegard Larsen, Hanne Nina Rasmussen
Summary: The study explored the effects of bark extracts on the germination and initial mycelium growth of corticolous lichen fungi using spore-shot isolation. Results showed that different tree species' bark extracts had varying effects on lichen growth, with extracts from Acer, Betula, and Fagus promoting germination and growth, while Fraxinus, Quercus, Tilia, and Alnus extracts exhibited inhibitory effects.
MYCOLOGICAL PROGRESS
(2021)
Article
Multidisciplinary Sciences
Lorenzo Pecoraro, Hanne N. Rasmussen, Sofia I. F. Gomes, Xiao Wang, Vincent S. F. T. Merckx, Lei Cai, Finn N. Rasmussen
Summary: Epiphytic orchids show varying degrees of specificity towards different tree species on which they grow. Environmental factors such as bark features and fungal communities on the host trees can influence orchid seed germination and diversity. Analysis using morphological, molecular culture-based methods, and metabarcoding revealed significant differences in fungal communities between different tree and orchid species, suggesting that the orchid-host tree association is influenced by the fungal communities on the host tree bark.
SCIENTIFIC REPORTS
(2021)