The growth and disease mitigating activity of fluorescent pseudomonad isolates under modified soil atmospheres.

Persistent Link:
http://hdl.handle.net/10150/186749
Title:
The growth and disease mitigating activity of fluorescent pseudomonad isolates under modified soil atmospheres.
Author:
Kim, Do Hoon.
Issue Date:
1994
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The growth of selected isolates of fluorescent pseudomonads in the rhizosphere of tomato (Lycopersicon esculentum cv. Earlypak) and cucumber (Cucumis sativus cv. Straight 8) seedlings was determined under soil atmospheres containing O₂:CO₂ concentrations of 21:0.03 (ambient), 18:3, 15:6, and 12:9%. While growth varied depending on the isolate, plant, and the composition of the soil atmosphere, it was generally greater under atmospheres containing lower-than-ambient levels of O₂ and higher-than-ambient levels of CO₂. The average percent growth increases, relative to control (the ambient atmosphere), for the most sensitive isolate were 16.5, 51.9, and 116.6, under O₂:CO₂ concentrations of 18:3, 15:6, and 12:9%, respectively. The effect of soil atmospheric composition on disease mitigating activity of two fluorescent pseudomonad isolates was also studied in the tomato-Pseudomonas solanacearum combination. Significant (p = 0.05) decreases in disease mitigating activity were observed when roots were placed under modified atmospheres containing lower-than-ambient levels of O₂ and higher-than-ambient levels of CO₂, compared to those placed under an ambient atmosphere. Modification of soil gaseous composition did not cause significant (p = 0.05) changes in the incidence of disease in plants inoculated with P. solanacearum alone.
Type:
text; Dissertation-Reproduction (electronic)
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Plant Pathology; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Misaghi, Iraj

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleThe growth and disease mitigating activity of fluorescent pseudomonad isolates under modified soil atmospheres.en_US
dc.creatorKim, Do Hoon.en_US
dc.contributor.authorKim, Do Hoon.en_US
dc.date.issued1994en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe growth of selected isolates of fluorescent pseudomonads in the rhizosphere of tomato (Lycopersicon esculentum cv. Earlypak) and cucumber (Cucumis sativus cv. Straight 8) seedlings was determined under soil atmospheres containing O₂:CO₂ concentrations of 21:0.03 (ambient), 18:3, 15:6, and 12:9%. While growth varied depending on the isolate, plant, and the composition of the soil atmosphere, it was generally greater under atmospheres containing lower-than-ambient levels of O₂ and higher-than-ambient levels of CO₂. The average percent growth increases, relative to control (the ambient atmosphere), for the most sensitive isolate were 16.5, 51.9, and 116.6, under O₂:CO₂ concentrations of 18:3, 15:6, and 12:9%, respectively. The effect of soil atmospheric composition on disease mitigating activity of two fluorescent pseudomonad isolates was also studied in the tomato-Pseudomonas solanacearum combination. Significant (p = 0.05) decreases in disease mitigating activity were observed when roots were placed under modified atmospheres containing lower-than-ambient levels of O₂ and higher-than-ambient levels of CO₂, compared to those placed under an ambient atmosphere. Modification of soil gaseous composition did not cause significant (p = 0.05) changes in the incidence of disease in plants inoculated with P. solanacearum alone.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplinePlant Pathologyen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairMisaghi, Irajen_US
dc.contributor.committeememberStanghellini, Michael E.en_US
dc.contributor.committeememberGilbertson, R.L.en_US
dc.contributor.committeememberNelson, M.R.en_US
dc.contributor.committeememberPierson, L.S.en_US
dc.identifier.proquest9426577en_US
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