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000857939 005__ 20210129235802.0
000857939 037__ $$aFZJ-2018-06893
000857939 041__ $$aEnglish
000857939 1001_ $$0P:(DE-Juel1)161532$$aSchneider, Hannah$$b0$$eCorresponding author
000857939 245__ $$aFunctional Implications of Root Cortical Senescence For Soil Resource Capture$$f - 2017
000857939 260__ $$aState College$$bPennsylvania State University$$c2017
000857939 300__ $$a1-219
000857939 3367_ $$2DataCite$$aOutput Types/Dissertation
000857939 3367_ $$2ORCID$$aDISSERTATION
000857939 3367_ $$2BibTeX$$aPHDTHESIS
000857939 3367_ $$02$$2EndNote$$aThesis
000857939 3367_ $$0PUB:(DE-HGF)11$$2PUB:(DE-HGF)$$aDissertation / PhD Thesis$$bphd$$mphd$$s1544024126_1244
000857939 3367_ $$2DRIVER$$adoctoralThesis
000857939 502__ $$aDissertation, Pennsylvania State University, 2017$$bDissertation$$cPennsylvania State University$$d2017
000857939 520__ $$aRoot phenes play a primary role in plant adaptation to edaphic stress. The identificationand understanding of the functional implications of root phenes may enable breeding and thedevelopment of crop varieties with improved soil resource acquisition. Root cortical senescence(RCS) is a type of programmed cell death in cortical cells of several Triticeae species. Untilrecently there has been very little attention as to the functional implications of RCS for water andnutrient capture.My research used physiology studies in the laboratory, greenhouse, and field and in silicoexperiments to characterize the development of RCS and understand its adaptive value and geneticcontrol. This dissertation explores the functional implications of RCS for water and nutrientcapture including its effects on root respiration and radial water and nutrient transport. Simulationresults suggest that RCS improves plant growth in edaphic stress conditions. Empiricalexperiments demonstrated its development of RCS is modulated by ethylene. RCS may be a usefultrait for water and nutrient acquisition, particularly in edaphic stress conditions.RCS may be an adaptive trait for nutrient acquisition by reallocating nutrients fromsenescing tissue and secondarily by reducing root respiration. As RCS progresses, less metabolicresources need to be invested in cortical maintenance, which could permit greater resourceallocation to the growth of shoots, other roots, and reproduction. These results suggest that RCSmerits investigation as a breeding target for enhanced soil resource acquisition and edaphic stresstolerance. The development of crops with enhanced soil resource acquisition would impact globalagriculture, since merits of RCS may be analogous to other species which also form RCS includingwheat, oats, and triticale.
000857939 536__ $$0G:(DE-HGF)POF3-582$$a582 - Plant Science (POF3-582)$$cPOF3-582$$fPOF III$$x0
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000857939 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)161532$$aForschungszentrum Jülich$$b0$$kFZJ
000857939 9131_ $$0G:(DE-HGF)POF3-582$$1G:(DE-HGF)POF3-580$$2G:(DE-HGF)POF3-500$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$aDE-HGF$$bKey Technologies$$lKey Technologies for the Bioeconomy$$vPlant Science$$x0
000857939 9141_ $$y2018
000857939 920__ $$lyes
000857939 9201_ $$0I:(DE-Juel1)IBG-2-20101118$$kIBG-2$$lPflanzenwissenschaften$$x0
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