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- W3208471388 abstract "Plantsregulate responses to their environment through complex hormone signaling;these hormones can be categorized broadly into two categories: growth anddefense, though many have roles in both. Much remains to be understood aboutthe complexity of hormone signaling in relation to environmental responses,especially species- and genotype-specific differences. Unraveling thiscomplexity of hormone signaling will lead to the development of resilient cropsthat are able to respond appropriately to their environment. In this dissertation,I hypothesize novel roles for growth and defense hormones in Solanum spp. responses to 1) biochar, ablack carbon soil amendment (Chapter 2), 2) infection with Ralstonia solanacearum, an economically important soilbornepathogen causing bacterial wilt (Chapter 3), and 3) endophytic colonization bythe soil bacterial community (Chapter 4). In Chapter 2, I showed that biocharupregulates GA signaling and affects GA-related traits in a species- andcultivar-specific manner. Biochar amendment also downregulates defensesignaling. In Chapter 3, I demonstrated a novel role for auxin in resistanceagainst R. solanacearum, includingdifferential expression of auxin signaling genes in resistant genotype H7996compared to susceptible WV in response to R.solanacearum infection. In addition, I observed stronger and fasterupregulation of defense hormone marker genes for SA and ET in H7996 compared toWV. In Chapter 4, I showed that SA and ET are required for normal tomato rootmicrobial community assembly, affecting the colonization of a few key taxa inorder to promote alpha diversity. H7996 and WV root communities differ in alphadiversity, and a panel of H7996 x WV RILs showed quantitative variation inalpha diversity that correlated negatively with the abundance of these keytaxa. In conclusion, I elucidated novel roles for hormones in responses to thesoil environment, pathogen infection, and root community colonization. Thesefindings are important for developing resilient, sustainable crops." @default.
- W3208471388 created "2021-11-08" @default.
- W3208471388 creator A5047221726 @default.
- W3208471388 date "2019-01-17" @default.
- W3208471388 modified "2023-09-23" @default.
- W3208471388 title "PLANT HORMONE PATHWAYS PLAY A CRUCIAL ROLE IN SOLANUM SPP. INTERACTIONS WITH THE SOIL ENVIRONMENT" @default.
- W3208471388 doi "https://doi.org/10.25394/pgs.7416437.v1" @default.
- W3208471388 hasPublicationYear "2019" @default.
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