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Old dog,new trick:The PHR-SPX system regulates arbuscular mycorrhizal symbiosis

Molecular Plant 2022年第2期15卷 225-227页

作者： Debatosh Das caroline gutjahr CUHK Shenzhen Research Institute No.10 Yuexing 2nd RoadNanshanShenzhenChina Plant Genetics TUM School of Life SciencesTechnical University of Munich(TUM)Emil Ramann Strasse 485354 FreisingGermany

Plant growth depends on the continuous availability of the macro-nutrient phosphate(Pi).However,in most soils,Pi is only poorly accessible to plants,resulting in Pi deficiency and triggering a number of Pi starvation *** strategy of plants to over-come Pi limitation is to form a symbiosis with arbuscular mycor-rhizal(AM)fungi(Smith et al.,2011),which occurs with approximately 80%of land *** fungi improve the uptake of Pi and other mineral nutrients and thereby increase plant performance and stress *** collect these minerals with an extraradical hyphal network from the soil and release them from highly branched structures,called arbuscules,into root cortex ***,Pi sufficiency causes inhibition of internal root colonization(Balzergue et al.,2011;Breuillin et al.,2010).The mechanistic basis for this has long remained *** studies have now solved this long-standing mystery and demonstrated that a canonical Pi-response regulatory module regulates AM symbiosis in accordance with the plant Pi status(Shi et al.,2021;Das et al.,2022).

关键词： thereby symbiosis release

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Calcium Signaling during Reproduction and Biotrophic Fungal Interactions in Plants

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Molecular Plant 2015年第4期8卷 595-611页

作者： Junyi Chen caroline gutjahr Andrea Bleckmann Thomas Dresselhaus Cell Biology and Plant Biochemistry Biochemie-Zentrum Regensburg University of Regensburg Universitatsstrabe 31 D-93053 Regensburg Germany Faculty of Bio o cly Genet cs Biocenter Martinsried University of Munich (LMU) Grosshaderner Strasse 2-4 D-82152 Martinsried Germany

Many recent studies have indicated that cellular communications during plant reproduction, fungal invasion, and defense involve identical or similar molecular players and mechanisms. Indeed, pollen tube invasion and sperm release shares many common features with infection of plant tissue by fungi and oomycetes, as a tip-growing intruder needs to communicate with the receptive cells to gain access into a cell and tissue. Depending on the comPatibility between cells, interactions may result in defense, inva- sion, growth support, or cell death. Plant cells stimulated by both pollen tubes and fungal hyphae secrete, for example, small cysteine-rich proteins and receptor-like kinases are activated leading to intracellular signaling events such as the production of reactive oxygen species （ROS） and the generation of calcium （Ca^2＋） transients. The ubiquitous and versatile second messenger Ca^2＋ thereafter plays a central and crucial role in modulating numerous downstream signaling processes. In stimulated cells, it elicits both fast and slow cellular responses depending on the shape, frequency, amplitude, and duration of the Ca^2＋ transients. The various Ca^2＋ signatures are transduced into cellular information via a battery of Ca^2＋-binding proteins. In this review, we focus on Ca^2＋ signaling and discuss its occurrence during plant reproduction and interactions of plant cells with biotrophic filamentous microbes. The participation of Ca^2＋ in ROS signaling pathways is also discussed.

关键词： pollen tube fertilization calcium fungal hyphae mycorrhiza compatibility

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Systems Biology of Plant-Microbiome Interactions

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Molecular Plant 2019年第6期12卷 804-821页

作者： Patricia A.Rodriguez Michael Rothballer Soumitra Paul Chowdhury Thomas Nussbaumer caroline gutjahr Pascal Falter-Braun Institute of Network Biology (INET) Helmholtz Zentrum Munchen German Research Center for Environmental Health Munich Germany Institute of Environmental Medicine (IEM) UNIKA-T Technical University of Munich Augsburg Germany Plant Genetics TUM School of Life Science Weihenstephan Technical University of Munich (TUM) Freising Germany Microbe-Host Interactions Faculty of Biology Ludwig-Maximilians-Universitat (LMU) Mijnchen Munich Germany

In natural environments,plants are exposed to diverse microbiota that they interact with in complex *** plant-pathogen interactions have been intensely studied to understand defense mechanisms in plants,many microbes and microbial communities can have substantial beneficial effects on their plant *** beneficial effects include improved acquisition of nutrients,accelerated growth,resilience against pathogens,and improved resistance against abiotic stress conditions such as heat,drought,and ***,the beneficial effects of bacterial strains or consortia on their host are often cultivar and species specific,posing an obstacle to their general ***,many of the signals that trigger plant immune responses are molecularly highly similar and often identical in pathogenic and beneficial ***,it is unclear what determines the outcome of a particular microbe-host interaction and which factors enable plants to distinguish beneficials from *** unravel the complex network of genetic,microbial,and metabolic interactions,including the signaling events mediating microbe-host interactions,comprehensive quantitative systems biology approaches will be needed.

关键词： plant systems biology plant microbiome microbial communities SynComs microbe-host interactions

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