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Ecology and evolution of the interac...

Goss, Erica Megan.

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Ecology and evolution of the interaction between the plant host Arabidopsis thaliana and its natural bacterial pathogen Pseudomonas viridiflava.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Ecology and evolution of the interaction between the plant host Arabidopsis thaliana and its natural bacterial pathogen Pseudomonas viridiflava./
作者:	Goss, Erica Megan.
面頁冊數:	115 p.
附註:	Adviser: Joy Bergelson.
Contained By:	Dissertation Abstracts International66-06B.
標題:	Biology, Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3181344
ISBN:	9780542214028

Ecology and evolution of the interaction between the plant host Arabidopsis thaliana and its natural bacterial pathogen Pseudomonas viridiflava.
Goss, Erica Megan.

Ecology and evolution of the interaction between the plant host Arabidopsis thaliana and its natural bacterial pathogen Pseudomonas viridiflava. - 115 p.

Adviser: Joy Bergelson.

Thesis (Ph.D.)--The University of Chicago, 2005.

Pathogens and their plant hosts can have reciprocal effects on both the numerical abundance and gene frequencies of the other species. Ecological and genetic factors are increasingly being integrated in mathematical models of host-pathogen interactions, yet comprehensive studies of wild systems remain limited in number and breadth. The ecological and evolutionary dynamics of plant-pathogen interactions should be highly dependent on the life history of the pathogen, but little is known about bacterial pathogens in association with wild plant communities.

ISBN: 9780542214028Subjects--Topical Terms:

1017726
Biology, Ecology.

Ecology and evolution of the interaction between the plant host Arabidopsis thaliana and its natural bacterial pathogen Pseudomonas viridiflava.
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245 1 0 $a Ecology and evolution of the interaction between the plant host Arabidopsis thaliana and its natural bacterial pathogen Pseudomonas viridiflava.
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520 $a Pathogens and their plant hosts can have reciprocal effects on both the numerical abundance and gene frequencies of the other species. Ecological and genetic factors are increasingly being integrated in mathematical models of host-pathogen interactions, yet comprehensive studies of wild systems remain limited in number and breadth. The ecological and evolutionary dynamics of plant-pathogen interactions should be highly dependent on the life history of the pathogen, but little is known about bacterial pathogens in association with wild plant communities.
520 $a I examined the evolutionary ecology of the interaction between the annual weed Arabidopsis thaliana and its natural bacterial pathogen P. viridiflava in Midwest populations. P. viridiflava was found to contain two genetically distinct and diverse groups (clades), which were found in close proximity in multiple populations. Within clades, there was evidence of frequent recombination and little geographic differentiation, which distinguishes P. viridiflava from other plant pathogens that have been examined. P. viridiflava infection rates in A. thaliana populations ranged from zero to greater than 50% and were correlated with A. thaliana population density. Yet, P. viridiflava appears to be a generalist pathogen, as it was found infecting other plants species that commonly co-occurred with A. thaliana . I found variation in resistance and virulence within and among plant and pathogen populations, as well as variation in virulence between the P. viridiflava clades, as measured by bacterial population size in the leaf and symptom severity 4 days after infection. Both resistance and plant development rate varied with field type of origin (cultivated or fallow), suggesting that different selection regimes in these two environments may mediate the interaction between A. thaliana and P. viridiflava. While I did not find a pattern of pathogen local adaptation, the two clades of P. viridiflava exhibited a possible tradeoff in virulence on A. thaliana from fallow versus cultivated fields. Finally, infection by P. viridiflava reduced the fitness of A. thaliana as measured by lifetime seed production in field and growth chamber experiments, with tolerance to infection varying among A. thaliana lines and with P. viridiflava clade, but also with environment.
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