HOST AND SITE SPECIFICITY OF CHEMOTACTIC RESPONSES OF ZOOSPORES OF PYTHIUM SPECIES TO ROOTS AND ROOT CAP CELLS OF GOSSYPIUM BARBADENSE AND GOSSYPIUM HIRSUTUM

Persistent Link:
http://hdl.handle.net/10150/276461
Title:
HOST AND SITE SPECIFICITY OF CHEMOTACTIC RESPONSES OF ZOOSPORES OF PYTHIUM SPECIES TO ROOTS AND ROOT CAP CELLS OF GOSSYPIUM BARBADENSE AND GOSSYPIUM HIRSUTUM
Author:
Goldberg, Natalie Pauline, 1960-
Issue Date:
1987
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:
Root cap cells of two cotton species elicited a specific chemotactic response in zoospores of Pythium dissotocum. When roots of cotton seedlings were placed into a suspension of P. dissotocum zoospores, there was immediate attraction, accumulation and encystment exclusively in the root cap cell region. Furthermore, root cap cells remained attractive when isolated from the root: attraction, accumulation, and encystment on individual root cap cells occurred within seconds after contact. Zoospores penetrated and killed isolated root cap cells within 15-30 minutes, and seedlings died within 24 hours. In contrast, zoospores of P. catenulatum, which exhibited a chemotactic response to roots of Bentgrass, were not attracted to and did not infect seedlings or isolated root cap cells of cotton. Preliminary studies indicate that both Pythium species are capable of infecting cotton seedlings in sand culture, though it is not known if either are pathogens on cotton grown in the field.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Cotton -- Roots -- Physiology.; Pythium -- Zoospores -- Toxicology.; Chemotaxis.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Plant Pathology
Degree Grantor:
University of Arizona

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleHOST AND SITE SPECIFICITY OF CHEMOTACTIC RESPONSES OF ZOOSPORES OF PYTHIUM SPECIES TO ROOTS AND ROOT CAP CELLS OF GOSSYPIUM BARBADENSE AND GOSSYPIUM HIRSUTUMen_US
dc.creatorGoldberg, Natalie Pauline, 1960-en_US
dc.contributor.authorGoldberg, Natalie Pauline, 1960-en_US
dc.date.issued1987en_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.abstractRoot cap cells of two cotton species elicited a specific chemotactic response in zoospores of Pythium dissotocum. When roots of cotton seedlings were placed into a suspension of P. dissotocum zoospores, there was immediate attraction, accumulation and encystment exclusively in the root cap cell region. Furthermore, root cap cells remained attractive when isolated from the root: attraction, accumulation, and encystment on individual root cap cells occurred within seconds after contact. Zoospores penetrated and killed isolated root cap cells within 15-30 minutes, and seedlings died within 24 hours. In contrast, zoospores of P. catenulatum, which exhibited a chemotactic response to roots of Bentgrass, were not attracted to and did not infect seedlings or isolated root cap cells of cotton. Preliminary studies indicate that both Pythium species are capable of infecting cotton seedlings in sand culture, though it is not known if either are pathogens on cotton grown in the field.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectCotton -- Roots -- Physiology.en_US
dc.subjectPythium -- Zoospores -- Toxicology.en_US
dc.subjectChemotaxis.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplinePlant Pathologyen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.identifier.proquest1331402en_US
dc.identifier.oclc19913701en_US
dc.identifier.bibrecord.b18385424en_US
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