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Physiological and growth regulatory mechanisms for drought tolerance and poststress recovery in cool-season turfgrass
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Chapman, Cathryn Rose. Physiological and growth regulatory mechanisms for drought tolerance and poststress recovery in cool-season turfgrass. Retrieved from https://doi.org/doi:10.7282/t3-5xxx-j566

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TitlePhysiological and growth regulatory mechanisms for drought tolerance and poststress recovery in cool-season turfgrass
NameChapman, Cathryn Rose (author); Huang, Bingru (chair); Gianfagna, Thomas (member); Meyer, William (member); Xu, Yan (member); Rutgers University; School of Graduate Studies
Date Created2022
Other Date2022-10 (degree)
SubjectPlant sciences, Physiology, Environmental science, Drought tolerance, Elevated carbon dioxide, Plant growth regulators, Poststress recovery, Turfgrass
Extent1 online resource (198 pages) : illustrations
DescriptionDrought stress caused by lack of rainfall or reduced water availability for irrigation is a major factor limiting the growth and productivity of many different plant species. Global climate changes involving increased frequencies of drought stress with extended periods of water-use restrictions are a major concern for overall plant health. Additionally, drought stress and other elements of climate change, such as elevated atmospheric concentrations of carbon dioxide, can have interactive effects that may impact plant growth. Cool-season grasses, such as creeping bentgrass (Agrostis stolonifera L.), tall fescue [Schedonorus arundinaceus (Schreb.) Dumort], or Kentucky bluegrass (Poa pratensis L.), that are utilized on lawns, golf courses, and sports fields can be severely damaged when exposed to prolonged periods of drought, often resulting in turfgrass dormancy or permanent loss of turfgrass stands. Rapid turfgrass recovery from drought stress is crucial once rewatering can occur. Therefore, effective management practices that improve drought stress tolerance during periods of limited water supply or promote rapid turf stand re-establishment and optimal growth once normal watering conditions are restored are essential to turfgrass survival. Thus, more information is needed regarding the physiological and metabolic mechanisms behind drought stress tolerance and postdrought recovery of turfgrass in order to maintain sustainable turfgrass systems. The goals of the dissertation research were to understand the mechanisms controlling drought tolerance and recuperative ability of cool-season turfgrasses and to identify effective organic molecules or metabolites (collectively plant growth regulators) that promote drought survival and postdrought recovery. Studies were conducted that would explore 1) the effects of elevated CO₂ for drought survival and postdrought recovery in three turfgrass species differing in growth habit, 2) application of amino acids, inorganic nitrogen, or hormones for the regeneration of new tillers from the crown and daughter plants from stolon nodes in creeping bentgrass, and 3) metabolic factors (hormones and metabolites) controlling postdrought regrowth from plant organs containing meristematic tissues. This research can help shed more light on developing future turfgrass management programs, where applications of growth-promoting amino acids or hormones might be an effective approach to enhancing rapid re-establishment of turf stands during postdrought recovery in areas with limited irrigation or rainfall.
NotePh.D.
NoteIncludes bibliographical references
Genretheses
Persistent URLhttps://doi.org/doi:10.7282/t3-5xxx-j566
LanguageEnglish
CollectionSchool of Graduate Studies Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.
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