1152 Chapters
Medium 9781780647128

19: Endophytic Bacteria Associated with Grapevine Plants: Putative Candidates for Phytoplasma Containment

Compant, S.; Mathieu, F. CABI PDF

19

Endophytic Bacteria Associated with Grapevine Plants: Putative

Candidates for Phytoplasma

Containment

D. Bulgari, P. Casati, F. Quaglino and P.A. Bianco*

Dipartimento di Scienze Agrarie ed Abientali, Università degli Studi di

Milano, Milan, Italy

Introduction

Bacteria residing in plant tissues without inducing symptoms of disease are defined as endophytes (Wilson, 1995). They are assumed to enter plant tissues from the adjacent rhizosphere either by passive diffusion or by active selection. Bacterial endophytes have been associated with different parts of plants, such as the roots, tubers, stems and leaves (Compant et al., 2010), where they mainly inhabit the vascular system, the intercellular spaces and/or the cell cytoplasm. Even if bacterial endophytes are commonly present in plants, the implication of their association with the host tissues is basically unknown. Although most of them exhibit no detectable impact on their hosts (Kado,

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Medium 9781574415278

October

Gary Lantz University of North Texas Press PDF

October

Where the majority of monarch butterflies went in autumn, and why, was a mystery until 1976. Then, following nearly 40 years of pursuit, Dr. Fred Urquhart revealed in the pages of National Geographic Magazine that millions of these insects wintered in the highlands

of Mexico’s Michoacan. Monarchs reaching their wintering grounds congregate in mountainside trees at elevations around 10,000 feet.

Here they remain mostly inactive, protecting fat reserves needed for the spring flight back to the U.S. And, while the Sierra Madre overwintering habitat can be chilly due to elevation, the monarchs compensate by clustering. Tens of thousands may roost in a single fir tree, creating their own self-heated microclimate.

Some of these butterflies travel 3,000 miles or more to reach the Michoacan uplands, with many passing through the Wichita

Mountains on their unparalleled autumn flight. The butterflies ride both thermals and the north winds arriving with October cool fronts. Refuge grasslands welcome these intercontinental travelers with flowering sprays of pale purple asters, each spray an excellent refueling station for butterflies that migrate like birds.

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Medium 9780253000804

9: Natural Resources, Climate Change, and Arctic Dinosaurs

Roland A. Gangloff Indiana University Press ePub

Arctic Dinosaurs and the Energy Crisis

What could Arctic dinosaur research and short-term solutions to our country’s energy crisis have to do with one another? Can one burn dinosaur bones to produce energy? Are dinosaur fossils an important source of North America’s petroleum? Are dinosaur bones an alternative source of energy to coal and petroleum? The answer to the first suggestion—burning dinosaur bones to produce energy—is “No!” The answer to the second (despite Sinclair’s Oil’s iconic trademark) is also a “No!” Interestingly, the answer to the third question is a qualified “Yes!”

During the great uranium “rush” of the 1950s in the Four Corners region of the southwestern United States, researchers found that Jurassic-age dinosaur skeletons often contained high amounts of uranium salts.1 These concentrations of uranium were great enough to make the collected bones so “hot” that curators of museum collections were required to place them in lead-shielded containers or have them removed and sent to regional repositories for nuclear waste. This was actually one of my first chores as a curator of Earth Science at the University of Alaska Museum—an aspect of collection research and safety requirements with which I was totally unfamiliar prior to assuming this position. There is little doubt in my mind that some uranium-rich dinosaur bone ended up in reactor fuel rods or atomic bombs.

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Medium 9780892727834

THE NORTH MAINE WOODS

Duchesne, Bob Down East Books ePub

The North Maine Woods provides a unique birding experience. The region west of Baxter State Park and north of Moosehead Lake is comprised of 3,500,000 acres, owned or managed by 25 different entities, including several private family ownerships, institutional investors, private conservation organizations, and some protected by the State of Maine as Public Reserved Lands. North Maine Woods, Inc. (NMW) is a non-profit association of these owners and managers formed in 1972 to oversee recreational use of these properties. Birders who venture into this region are participating in a centuries old tradition of public access on private lands and must recognize that this is an industrial forest, and respect its rules. The association charges small fees for day and overnight use to fund recreation management and campsite maintenance.

Trip planning: www.northmainewoods.org or 207-435-6213

The pleasures awaiting adventurous birders in the North Maine Woods are innumerable. Lakes, ponds, and rivers are undeveloped. Moose, coyotes, and bears roam at will. Populations of the rare Canada Lynx have increased. Forestry practices have defined the habitat for some bird populations. This is an area that has been logged repeatedly over 200 years and the species that reside here are those that have adapted to it. All of Maine

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Medium 9781786390981

2 Invasive Alien Plant Impacts on Human Health and Well-being

Mazza, G.; Tricarico, E. CABI PDF

2

Invasive Alien Plant Impacts on

Human Health and Well-being

Lorenzo Lazzaro1*, Franz Essl2, Antonella Lugliè3,

Bachisio Mario Padedda3, Petr Pyšek4,5 and

Giuseppe Brundu3

1University

of Florence, Italy; 2University of Vienna, Austria; of Sassari, Italy; 4The Czech Academy of Sciences,

Institute of Botany, Průhonice, Czech Republic; and 5Charles

University, Prague, Czech Republic

3University

Abstract

In this chapter we review, based on information available in scientific literature and reports, the most common negative direct impacts of invasive alien plants and Cyanobacteria on human health and well-being. Poisonous or toxic plants, i.e. plants containing toxic compounds, may impact human health generally after the ingestion of part of the plant (see

Nicotiana glauca) or of some product derived from toxic plants (see Senecio inaequidens

­poisoned products). Allergenic plants are among the most studied cases of impacts of alien plants, particularly concerning the role of allergenic pollen. Many invasive species are

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