scholarly journals The Effect of Water Limitation on Volatile Emission, Tree Defense Response, and Brood Success of Dendroctonus ponderosae in Two Pine Hosts, Lodgepole, and Jack Pine

2016 ◽  
Vol 4 ◽  
Author(s):  
Inka Lusebrink ◽  
Nadir Erbilgin ◽  
Maya L. Evenden
Keyword(s):  
Defense Response ◽  
Dendroctonus Ponderosae ◽  
Jack Pine ◽  
Water Limitation ◽  
Volatile Emission ◽  
Effect Of Water ◽  
Brood Success

scholarly journals The ecological interaction of the mountain pine beetle and jack pine budworm in the boreal forest

2010 ◽  
Vol 86 (6) ◽  
pp. 766-774 ◽  
Author(s):  
Lindsay J. Colgan ◽  
Nadir Erbilgin
Keyword(s):  
Climate Change ◽  
Boreal Forest ◽  
Mountain Pine Beetle ◽  
Dendroctonus Ponderosae ◽  
Jack Pine ◽  
Mountain Pine ◽  
Choristoneura Pinus ◽  
Pine Beetle ◽  
Jack Pine Budworm ◽  
Choristoneura Pinus Pinus

As climate change facilitates the range and host expansion of insect species into new ecosystems, the development of newstrategies for managing and preventing biological invasion is receiving considerable interest. In recent years, the range ofthe mountain pine beetle (Dendroctonus ponderosae Hopkins) has expanded from lodgepole pine-dominated forests eastof the Rocky Mountains into lodgepole x jack pine hybrid forest of western Alberta, and may soon invade jack pine forestsof the boreal. Our understanding of factors contributing colonization of jack pine by mountain pine beetle is far fromcomplete and several factors may limit its spread in these forests, including tree resistance and competitors. Among these,the jack pine budworm (Choristoneura pinus pinus Freeman) is one of the most important insect enemies of jack pine andan outbreak defoliator that potentially weakens jack pine trees, which may make them more susceptible to MPB attacks.To develop effective management strategies in the face of the short-run impacts of climate change, we need an in-depthunderstanding of factors influencing establishment and survival of the beetle in jack pine forests.Key words: Choristoneura pinus pinus, Dendroctonus ponderosae, jack pine, range expansion, invasion biology, climatechange in the boreal forest, conifer-mediated interactions, tree induced defences, tripartite interactions

THE WATER RELATIONS OF FOOD-BORNE BACTERIAL PATHOGENS. A REVIEW

1973 ◽  
Vol 36 (5) ◽  
pp. 276-288 ◽  
Author(s):  
John A. Troller
Keyword(s):  
Water Activity ◽  
Water Relations ◽  
Bacterial Pathogens ◽  
Activity Levels ◽  
Microbial Decomposition ◽  
Water Limitation ◽  
Effect Of Water ◽  
Food Borne ◽  
Influence Of Water ◽  
Textural Changes

Water limitation techniques can be useful tools to preserve food materials not only from autodecomposition, but also from microbial decomposition. Besides those organisms that might render a food unfit to eat because they can produce adverse compositional and textural changes, food-borne bacterial pathogens are also influenced by the amount of available water. This review considers several major food-borne bacterial pathogens and the effect of water limitation on various aspects of their growth. Wherever possible, references have been included which pertain to the influence of water limitation on these organisms in foods. The data reviewed indicate that food-borne bacterial pathogens in general can grow at water activity levels of 0.83 to 0.999. The implications of this wide aw range for prevention of growth of food pathogens and thus, the safety of foods, are discussed.

Mountain pine beetle (Dendroctonus ponderosae) can produce its aggregation pheromone and complete brood development in naïve red pine (Pinus resinosa) under laboratory conditions

2015 ◽  
Vol 45 (12) ◽  
pp. 1873-1877 ◽  
Author(s):  
Jonathan A. Cale ◽  
Spencer Taft ◽  
Ahmed Najar ◽  
Jennifer G. Klutsch ◽  
Cory C. Hughes ◽  
...  
Keyword(s):  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Dendroctonus Ponderosae ◽  
Pinus Resinosa ◽  
Jack Pine ◽  
Red Pine ◽  
The Novel ◽  
Suitable Host ◽  
Pine Beetle ◽  
Novel Host

Mountain pine beetle (Dendroctonus ponderosae Hopkins; Coleoptera: Curculionidae, Scolytinae) has killed millions of hectares of lodgepole pine (Pinus contorta Douglas ex Loudon) forest in western Canada, where it has recently established in the novel host jack pine (Pinus banksiana Lamb.) and threatens naïve red pine (Pinus resinosa Aiton) forests as the current outbreak expands eastward. It is therefore crucial to understand whether red pine is a suitable host for D. ponderosae. Host suitability was assessed by comparing the ability of beetles to produce pheromones and complete their development in red pine bolts inoculated with mating beetle pairs. We detected two of four primary pheromones, including trans-verbenol and verbenone, but not exo-brevicomin or frontalin. Beetle brood successfully developed in bolts, with reproductive parameters (e.g., female and larval galleries, pupal chamber, and number of broods emerged per mated pair of adults) that were similar to those reported from the beetle’s historical host lodgepole pine and the novel host jack pine. These results provide initial evidence that red pine is a suitable host for D. ponderosae. However, it is unclear how either low concentrations or an absence of exo-brevicomin, frontalin, and the synergistic monoterpene myrcene could affect host colonization and establishment of beetles.

EGG GALLERY, BROOD PRODUCTION, AND ADULT CHARACTERISTICS OF MOUNTAIN PINE BEETLE, DENDROCTONUS PONDEROSAE HOPKINS (COLEOPTERA: SCOLYTIDAE), IN THREE PINE HOSTS

1995 ◽  
Vol 127 (6) ◽  
pp. 955-965 ◽  
Author(s):  
H.F. Cerezke
Keyword(s):  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Dendroctonus Ponderosae ◽  
Jack Pine ◽  
Brood Production ◽  
East Central ◽  
Limber Pine ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Jack Pine Forests

AbstractDuring the 1977–1986 outbreak of mountain pine beetle (Dendroctonus ponderosae) in southwestern Alberta and Saskatchewan, populations of this beetle developed in lodgepole pine and limber pine stands, and threatened to spread northeasterly to the extensive jack pine forests in the central parts of the two provinces. To assess jack pine as a potential new breeding host, I compare egg galleries, brood production, and adult characteristics of D. ponderosae reared in lodgepole, limber, and jack pine logs. Brood productivity, beetle size, sex ratios, and egg gallery characteristics are described for beetle populations reared from naturally infested limber pine logs from southwestern Alberta, and from artificially infested jack pine logs from east-central Alberta and central Saskatchewan. In a field experiment where logs of the three hosts were placed together, adult beetles and their gallery characteristics are described and compared on the three hosts. The results confirm that jack pine is a viable host, that D. ponderosae’s attack characteristics, survival, and progeny on jack pine all appear comparable to those characters observed for beetles reared on lodgepole pine, and that limber pine is highly productive of beetle brood.

The combined effect of water limitation and UV-B radiation on common and tartary buckwheat

2013 ◽  
Vol 41 (1) ◽  
pp. 97-105 ◽  
Author(s):  
M. Germ ◽  
B. Breznik ◽  
N. Dolinar ◽  
I. Kreft ◽  
A. Gaberščik
Keyword(s):  
Combined Effect ◽  
Tartary Buckwheat ◽  
Water Limitation ◽  
Effect Of Water

scholarly journals Pathogen and drought stress affect cell wall and phytohormone signaling to shape host responses in a sorghum COMT bmr12 mutant

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Maya Khasin ◽  
Lois F. Bernhardson ◽  
Patrick M. O’Neill ◽  
Nathan A. Palmer ◽  
Erin D. Scully ◽  
...  
Keyword(s):  
Signal Transduction ◽  
Cell Wall ◽  
Defense Response ◽  
Secondary Cell Wall ◽  
Macrophomina Phaseolina ◽  
Pathogen Resistance ◽  
Null Alleles ◽  
Internal Damage ◽  
Water Limitation ◽  
Phytohormone Signaling

Abstract Background As effects of global climate change intensify, the interaction of biotic and abiotic stresses increasingly threatens current agricultural practices. The secondary cell wall is a vanguard of resistance to these stresses. Fusarium thapsinum (Fusarium stalk rot) and Macrophomina phaseolina (charcoal rot) cause internal damage to the stalks of the drought tolerant C4 grass, sorghum (Sorghum bicolor (L.) Moench), resulting in reduced transpiration, reduced photosynthesis, and increased lodging, severely reducing yields. Drought can magnify these losses. Two null alleles in monolignol biosynthesis of sorghum (brown midrib 6-ref, bmr6-ref; cinnamyl alcohol dehydrogenase, CAD; and bmr12-ref; caffeic acid O-methyltransferase, COMT) were used to investigate the interaction of water limitation with F. thapsinum or M. phaseolina infection. Results The bmr12 plants inoculated with either of these pathogens had increased levels of salicylic acid (SA) and jasmonic acid (JA) across both watering conditions and significantly reduced lesion sizes under water limitation compared to adequate watering, which suggested that drought may prime induction of pathogen resistance. RNA-Seq analysis revealed coexpressed genes associated with pathogen infection. The defense response included phytohormone signal transduction pathways, primary and secondary cell wall biosynthetic genes, and genes encoding components of the spliceosome and proteasome. Conclusion Alterations in the composition of the secondary cell wall affect immunity by influencing phenolic composition and phytohormone signaling, leading to the action of defense pathways. Some of these pathways appear to be activated or enhanced by drought. Secondary metabolite biosynthesis and modification in SA and JA signal transduction may be involved in priming a stronger defense response in water-limited bmr12 plants.

scholarly journals Comparison of lodgepole and jack pine resin chemistry: implications for range expansion by the mountain pine beetle,Dendroctonus ponderosae(Coleoptera: Curculionidae)

PeerJ ◽  
2014 ◽  
Vol 2 ◽  
pp. e240 ◽  
Author(s):  
Erin L. Clark ◽  
Caitlin Pitt ◽  
Allan L. Carroll ◽  
B. Staffan Lindgren ◽  
Dezene P.W. Huber
Keyword(s):  
Range Expansion ◽  
Mountain Pine Beetle ◽  
Dendroctonus Ponderosae ◽  
Jack Pine ◽  
Pine Resin ◽  
Mountain Pine ◽  
Pine Beetle

Autonomic mechanisms underlying the cardiac defense response in humans

1996 ◽  
Author(s):  
Jaime Vila ◽  
M. Carmen Fernandez ◽  
M. Nieves Perez ◽  
Gustavo Reyes
Keyword(s):  
Defense Response
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