Endophytic colonization of barley (Hordeum vulgare) roots by the nematophagous fungus Pochonia chlamydosporia reveals plant growth promotion and a general defense and stress transcriptomic response

Plant crop yields are negatively conditioned by a large set of biotic and abiotic factors. An alternative to mitigate these adverse effects is the use of fungal biological control agents and endophytes. The egg-parasitic fungus Pochonia chlamydosporia has been traditionally studied because of its potential as a biological control agent of plant-parasitic nematodes. This fungus can also act as an endophyte in monocot and dicot plants, and has been shown to promote plant growth in different agronomic crops. An Affymetrix 22K Barley GeneChip was used in this work to analyze the barley root transcriptomic response to P. chlamydosporia root colonization. Functional gene ontology (GO) and gene set enrichment analyses showed that genes involved in stress response were enriched in the barley transcriptome under endophytism. An 87.5 % of the probesets identified within the abiotic stress response group encoded heat shock proteins. Additionally, we found in our transcriptomic analysis an up-regulation of genes implicated in the biosynthesis of plant hormones, such as auxin, ethylene and jasmonic acid. Along with these, we detected induction of brassinosteroid insensitive 1-associated receptor kinase 1 (BR1) and other genes related to effector-triggered immunity (ETI) and pattern-triggered immunity (PTI). Our study supports at the molecular level the growth-promoting effect observed in plants endophytically colonized by P. chlamydosporia, which opens the door to further studies addressing the capacity of this fungus to mitigate the negative effects of biotic and abiotic factors on plant crops.

Colonization Map, Northwest Algeria, 1883 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Département d'Oran : colonisation, par A.D. Langlois ; dressée sous le patronage de la Société de Géographie d'Oran. It was published by Challamel et Cie. in 1883. Scale [ca. 1:800,000]. Covers northwest Algeria. Map in French.The image inside the map neatline is georeferenced to the surface of the earth and fit to the Europe Lambert Conformal Conic coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, cities and other human settlements, roads, railroads and stations, canals, ruins, mines, territorial claims, shoreline features, forests, ground cover, and more. Includes also statistical tables on population and agriculture.This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.

Effect of mode of delivery on early oral colonization and childhood dental caries: a systematic review

Background: Oral colonization starts at birth by vertical transmission. Objective: To determine whether mode of delivery influences the oral colonization of infants and contributes to the risk of childhood dental caries. Methods: A systematic review was conducted in the electronic database Web of Science for articles published from January 1995 to December 2015 by using a set of keywords. Results: From 2,644 citations identified through electronic search, ten studies met the inclusion criteria. According to the studies mode of delivery influences oral microbial density, oral microbial profile and the timing of oral colonization by cariogenic microbiota. However, there are no consistent results concerning either the prevalence of children harboring cariogenic microbiota or the prevalence of early childhood caries by mode of delivery. Conclusion: Mode of delivery influences early oral colonization. However, it seems that other determinants rather than mode of delivery could be major contributors to the development of early childhood caries. Keywords: Early childhood caries, early oral colonization, acquisition of oral microflora, mode of delivery

Differences in larval nutritional requirements and female oviposition preference reflect the order of fruit colonization of Zaprionus indianus and Drosophila simulans

Species coexist using the same nutritional resource by partitioning it either in space or time, but few studies explore how species-specific nutritional requirements allow partitioning. Zaprionus indianus and Drosophila simulans co-exist in figs by invading the fruit at different stages; Z. indianus colonizes ripe figs, whereas D. simulans oviposits in decaying fruit. Larvae feed on yeast growing on the fruit, which serves as their primary protein source. Because yeast populations increase as fruit decays, we find that ripe fruit has lower protein content than rotting fruit. Therefore, we hypothesized that Z. indianus and D. simulans larvae differ in their dietary requirements for protein. We used nutritional geometry to assess the effects of protein and carbohydrate concentration in the larval diet on life history characters in both species. Survival, development time, and ovariole number respond differently to the composition of the larval diet, with Z. indianus generally performing better across a wider range of protein concentrations. Correspondingly, we found that Z. indianus females preferred to lay eggs on low protein foods, while D. simulans females chose higher protein foods for oviposition when competing with Z. indianus. We propose the different nutritional requirements and oviposition preference of these two species allows them to temporally partition their habitat.

A history of education in New Mexico. Pertinent advice to students. Education and its relations to the discovery, conquest, civilization and colonization of New Mexico; the minister of God and the teacher,

Mode of access: Internet.

The "Icor" and the Jewish colonization in the U.S.S.R. /

Cover title.

Animal colonization of man-initiated salt marshes on dredge spoil /

"June 1976."

Slaveholding and colonization : a reply to George D. Armstrong, D.D., of Norfolk, Va., on slaveholding and colonization.

"Reprinted from the Presbyterian Magazine, of December, 1858. It is the fifth of a series of Replies ... in answer to the Letters of Dr. Armstrong."

Constitution of the State of Texas, adopted unanimously in Convention, at the City of Austin, 1845. An Ordinance in relation to colonization contracts. An Ordinance assenting to the proposals of the United States' Congress for the annexation of Texas.

Mode of access: Internet.

Description of the various systems of wooden railways, in connection with the report of the special Committee named by the Toronto legislature, to investigate and enquire into their usefulness and cost for colonization purposes. With woodcuts ...

Mode of access: Internet.

Annual report of the Board of Managers of the Massachusetts Colonization Society.

Mode of access: Internet.

Annual report of the Colonization Society of the State of New York.

Report year ends in May.

A statistical, political, and historical account of the United States of North America; from the period of their first colonization to the present day.

Brief bibliographies at end of many of the chapters.

Thoughts on African colonization, or, An impartial exhibition of the doctrines, principles and purposes of the American Colonization Society : together with the resolutions, addresses, and remonstrances of the free people of color /

Mode of access: Internet.