An N-acetylglucosamine transporter required for arbuscular mycorrhizal symbioses in rice and maize

Most terrestrial plants, including crops, engage in beneficial interactions with arbuscular mycorrhizal fungi. Vital to the association is mutual recognition involving the release of diffusible signals into the rhizosphere. Previously, we identified the maize $\textit{no perception 1}$ ($\textit{nope1}$) mutant to be defective in early signalling. Here, we report cloning of $\textit{ZmNope1}$ on the basis of synteny with rice. $\textit{NOPE1}$ encodes a functional homologue of the $\textit{Candida albicans}$ $N$-acetylglucosamine (GlcNAc) transporter $\textit{NGT1}$, and represents the first plasma membrane GlcNAc transporter identified from plants. In $\textit{C. albicans}$, exposure to GlcNAc activates cell signalling and virulence. Similarly, in $\textit{Rhizophagus irregularis}$ treatment with rice wild-type but not $\textit{nope1}$ root exudates induced transcriptome changes associated with signalling function, suggesting a requirement of NOPE1 function for presymbiotic fungal reprogramming.Research in the U.P. laboratories was supported by the Swiss National Science Foundation grants 3100A0- 104132, PP00A-110874, PP00P3-130704 and by the Gatsby Charitable Foundation grant RG60824. S.N. and J.B.K. were supported by a grant from the National Institutes of Health (R01GM116048)

A Torte of Two Cities

Literary inspiration: A Tale of Two Citieshttps://scholarworks.umass.edu/ediblebookfest_2018/1006/thumbnail.jp

The role of the energy source "Hydrocarbons" today

Prolusione di prestigio al Convegno InternazionaleOSEA 2012 (Singapore, 27-30 novembre 2012) su invito ad opera di emissari della Autoritò governativa Palestines

An N-acetylglucosamine transporter required for arbuscular mycorrhizal symbioses in rice and maize

Most terrestrial plants, including crops, engage in beneficial interactions with arbuscular mycorrhizal fungi. Vital to the association is mutual recognition involving the release of diffusible signals into the rhizosphere. Previously, we identified the maize no perception 1 (nope1) mutant to be defective in early signalling. Here, we report cloning of ZmNope1 on the basis of synteny with rice. NOPE1 encodes a functional homologue of the Candida albicans N-acetylglucosamine (GlcNAc) transporter NGT1, and represents the first plasma membrane GlcNAc transporter identified from plants. In C. albicans, exposure to GlcNAc activates cell signalling and virulence. Similarly, in Rhizophagus irregularis treatment with rice wild-type but not nope1 root exudates induced transcriptome changes associated with signalling function, suggesting a requirement of NOPE1 function for presymbiotic fungal reprogramming

Ascetic tropics: Franciscans, missionary knowledge and visions of Empire in the Portuguese Atlantic at the turn of the eighteenth century

This essay focuses on the study of Franciscan written and intellectual culture in Portuguese America. Specifically, it analyzes the role the Franciscans played, through their writings, in the shaping of the Portuguese- American world, of the way that world was thought about, and of contemporary understandings of the place Brazil should occupy within the Portuguese monarchy. It examines the visions of the Empire which the so-called Seraphic Order developed in the Brazilian colonial context, the written strategies they used, and the missionary and colonial knowledge which they employed when constructing their perceptions of the American world. To that end, it looks in detail at the Franciscan friar António do Rosário and his text <em>Frutas do Brasil</em> (Lisbon, 1702), in which he used his knowledge of the natural world to construct a complex plant-based allegory with clear political connotations about Brazil.<br><br>El presente trabajo centra su atención en el estudio de la cultura escrita e intelectual de los franciscanos en la América portuguesa. En concreto, analiza el papel que los franciscanos, a través de sus textos, desempeñaron en la configuración del mundo luso-americano, en el modo de pensarlo y en la forma de entender el lugar que Brasil debía ocupar dentro de la Monarquía portuguesa. Examina las visiones de imperio que la Orden seráfica construyó, las estrategias escritas que empleó a tal efecto y los saberes misioneros y coloniales que movilizó a la hora de elaborar sus percepciones del mundo americano. Para ello, se centra en la figura de Fr. António do Rosário y su obra Frutas do Brasil (Lisboa, 1702), en la que el autor hizo uso de su conocimiento del mundo natural para construir una compleja alegoría hortofrutícola de claras connotaciones políticas en torno a Brasil