The effect of seaweed concentrate on turfgrass growth, nematode tolerance and protein synthesis under moisture stress conditions

Simple item page
dc.contributor.authorSun, Hongweien
dc.contributor.committeechairSchmidt, Richard E.en
dc.contributor.committeememberBuss, Glenn R.en
dc.contributor.committeememberChalmers, D.R.en
dc.contributor.committeememberEisenback, Jonathan D.en
dc.contributor.committeememberOrcutt, David M.en
dc.contributor.departmentCrop and Soil Environmental Sciencesen
dc.date.accessioned2014-03-14T21:13:28Zen
dc.date.adate2008-06-06en
dc.date.available2014-03-14T21:13:28Zen
dc.date.issued1994en
dc.date.rdate2008-06-06en
dc.date.sdate2008-06-06en
dc.description.abstractA preliminary experiment was conducted to determine the effects of salinity and moisture stress on the pathogenicity of root-knot nematodes (RKN) in turfgrass plants. The results indicated that RKN infection adversely affected both visual and functional parameters of bentgrass. Salinity and moisture stress further exaggerated the damage caused by RKN. Under well-watered conditions, the effects of SWC and RKN infection on bentgrass plants were studied. Applications of Swe at 0.5 liter ha⁻¹ and 1.0 liter ha⁻¹ effectively enhanced bentgrass growth under both RKN-free and RKN-infected condition. It was shown that RKN caused less damage to SWC-treated plants than to non-treated plants. In addition, a soil drench of 0.5 liter ha⁻¹ and 1.0 liter ha⁻¹ at 10 day intervals was required to enhance bentgrass growth under RKN-free and RKN-infected conditions, respectively. The effects of seven SWC treatments on the growth of nematode-free and RKN infected bentgrass plants were tested under three irrigation regimes. Rooting and leaf moisture parameters, quality and clipping yield were all improved to some degree by SWC applications. High dosage SWC treatments, applied as a soil drench at one liter ha⁻¹ every 10 days, were most effective in improving plant growth. Application of SWC was more beneficial to RKN-infected plants than RKN-free plants, and to abiotically stressed plants than to abiotic stress-free plants. In a separate study, seaweed application was also shown to enhance both top growth and root growth of lance nematode (Hoplolaimus galeatus) or RKN infected bentgrass grown under drought or salinity stress condition. With SWC application, almost all of the symptoms caused by nematode infection and the abiotic stress were partially overcome. In addition, root development, leaf water status and clipping yield were all improved. It was apparent that soil drench SWC treatments were more effective in enhancing bentgrass growth than foliar Swc treatments. Application of SWC slightly reduced the number of nematodes per unit of fresh root (for RKN) and per unit weight of soil (for lance nematodes). Protein extracted from SWC-treated or non-treated ryegrass plants under different stress conditions indicated that SWC altered plant protein synthesis, possibly by inducing selective gene expressions.en
dc.description.degreePh. D.en
dc.format.extentxiv, 161 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-06062008-163430en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06062008-163430/en
dc.identifier.urihttp://hdl.handle.net/10919/38231en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1994.S86.pdfen
dc.relation.isformatofOCLC# 31228841en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1994.S86en
dc.subject.lcshCreeping bentgrass -- Diseases and pests -- Controlen
dc.subject.lcshMarine algae as fertilizeren
dc.subject.lcshPlants -- Effect of soil moisture onen
dc.subject.lcshRoot-knot -- Controlen
dc.subject.lcshTurfgrasses -- Diseases and pests -- Controlen
dc.titleThe effect of seaweed concentrate on turfgrass growth, nematode tolerance and protein synthesis under moisture stress conditionsen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineCrop and Soil Environmental Sciencesen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
LD5655.V856_1994.S86.pdf
Size:
7.02 MB
Format:
Adobe Portable Document Format
Description:
Download

Collections

Doctoral Dissertations