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dc.contributor.advisorCothren, J. Tomen_US
dc.creatorCarden, Charles Warrenen_US
dc.date.accessioned2010-10-12T22:31:50Zen_US
dc.date.accessioned2010-10-14T16:07:43Z
dc.date.available2010-10-12T22:31:50Zen_US
dc.date.available2010-10-14T16:07:43Z
dc.date.created2010-08en_US
dc.date.issued2010-10-12en_US
dc.date.submittedAugust 2010en_US
dc.identifier.urihttp://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8336en_US
dc.description.abstractLow photosynthetic photon flux density (PPFD) during certain growth periods of cotton (Gossypium hirsutum L.) has been shown to impact yield, ethylene synthesis, and fiber quality. Previous research with shading has shown that lint yield can be significantly reduced in the latter stages of growth. This two-year field study was conducted at the Texas A&M AgriLife Research Farm in Burleson County, Texas, in 2008 and 2009. The study evaluated the impact of an 8-day period of shade (63 percent reduction of PPFD) on cotton yield parameters, fiber quality, and the impact of 1-methylcyclopropene (1-MCP), an ethylene inhibitor, to alter detrimental cotton responses when applied as a foliar spray under shaded and non-shaded conditions. Shade and 1-MCP were imposed at four developmental stages of growth: pinhead square (PHS), first flower (FF), peak flower (PF), and boll development (BD). Data pooled over both years indicated that there were no significant differences in yield for 1-MCP treatments; however, numerical differences existed. Shade applied during the BD stage of development showed significantly lower yield than the untreated control. These results showed a decline in seed cotton and ginned seed cotton by 522 and 207 kg ha-1, respectively. To further analyze further yield components, box-mapping was conducted during both years. However, this data failed to explain consistent patterns of the observed yield responses. Data was also collected to determine the amount of fibers per seed and seed weights. Cotton fiber data did not show consistent correlations with the numerical increases and significant decreases in yield. Electrolyte leakage and stomatal conductance data also were collected. Electrolyte leakage showed no statistical differences when compared to the untreated control. Stomatal conductance measurements showed no consistency for treatments during both years.en_US
dc.format.mimetypeapplication/pdfen_US
dc.language.isoen_USen_US
dc.subjectPPFDen_US
dc.subjectshadeen_US
dc.subjectcottonen_US
dc.subjectgossypium hirsutumen_US
dc.subjectimpacten_US
dc.subjectethyleneen_US
dc.subjectfiber qualityen_US
dc.subjectshadingen_US
dc.subjectreduced yielden_US
dc.subjectgrowth stagesen_US
dc.subject1-MCPen_US
dc.subject1-methylcyclopropene stomtal conductanceen_US
dc.subjectelectrolyte leakageen_US
dc.subjectfibers per seeden_US
dc.titleCotton Response to 1-Methylcyclopropene Under Different Light Regimes and Growth Stages: Lint Yield and Yield Componentsen_US
dc.typeBooken
dc.typeThesisen
thesis.degree.departmentSoil and Crop Sciencesen_US
thesis.degree.disciplineAgronomyen_US
thesis.degree.grantorTexas A&M Universityen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelMastersen_US
dc.contributor.committeeMemberSenseman, Scott A.en_US
dc.contributor.committeeMemberReed, David W.en_US
dc.type.genreElectronic Thesisen_US
dc.type.materialtexten_US


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