Rhythm of zoospore production of pythium on lettuce cultured hydroponically

Persistent Link:
http://hdl.handle.net/10150/276687
Title:
Rhythm of zoospore production of pythium on lettuce cultured hydroponically
Author:
Sultan, Youneskhan, 1957-
Issue Date:
1988
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:
Zoospore production of Pythium dissotocum Drechs. in the nutrient solution of hydroponically-grown lettuce, in the greenhouse, was shown to be cyclic. The number of zoospores detected in the nutrient solution was lowest around noontime, (11:00-14:00 hr) and highest around 20:00 hr. Growth chamber studies were conducted to determine the effect of different light periods on zoospore production. Under continuous light or continuous darkness, the population of zoospores in the nutrient solution decreased. But under 12 hours light, and 12 hours darkness or two periods of light each for 3 hours, zoospore populations decreased during the light period but increased during the dark period.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Lettuce -- Diseases and pests.; Pythium.; Hydroponics.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Plant Pathology
Degree Grantor:
University of Arizona
Advisor:
Stanghellini, Michael E.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleRhythm of zoospore production of pythium on lettuce cultured hydroponicallyen_US
dc.creatorSultan, Youneskhan, 1957-en_US
dc.contributor.authorSultan, Youneskhan, 1957-en_US
dc.date.issued1988en_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.abstractZoospore production of Pythium dissotocum Drechs. in the nutrient solution of hydroponically-grown lettuce, in the greenhouse, was shown to be cyclic. The number of zoospores detected in the nutrient solution was lowest around noontime, (11:00-14:00 hr) and highest around 20:00 hr. Growth chamber studies were conducted to determine the effect of different light periods on zoospore production. Under continuous light or continuous darkness, the population of zoospores in the nutrient solution decreased. But under 12 hours light, and 12 hours darkness or two periods of light each for 3 hours, zoospore populations decreased during the light period but increased during the dark period.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectLettuce -- Diseases and pests.en_US
dc.subjectPythium.en_US
dc.subjectHydroponics.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.contributor.advisorStanghellini, Michael E.en_US
dc.identifier.proquest1333264en_US
dc.identifier.oclc20441687en_US
dc.identifier.bibrecord.b17006831en_US
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