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Molecular response of nicotiana attenuata to herbivory and solar UVB: laboratory and fieldwork
Plants have coexisted with insects for approximately 400 million years. During this time, the interactions between flora and fauna have driven coevolutionary and reciprocal changes, resulting in a complex mosaic of plant defenses and insect counter-defenses. In addition, abiotic stress such as UVB radiation dramatically affects plant performance; therefore, mechanisms to recognize environmental stresses, mounting of properly scaled responses and fitness optimization are three essential features for plant survival in nature. This work describes novel regulatory mechanisms and interactions mediating plant defense against herbivores, and the effect of solar UVB light on plant defense in Nicotiana attenuata. Specifically, I describe the function of three dicer like proteins (NaDCL2, NaDCL3, NaDCL4) in plant development, the regulation of their transcripts during herbivory and their contribution to mediating some defense metabolites such as nicotine and trypsin proteinase inhibitors, possibly via mediating multiple signaling pathways and regulators such as ethylene, JA signaling pathways, mitogen activated protein kinases (MAPKs), and MYB transcription factors. In addition, for the first time, the involvement of ABA signaling and the interaction of ABA-JA signaling were decoded and revealed the crucial function of ABA signaling in regulating herbivory-induced defense metabolites such as HGL-DTGs, caffeoylputrescine, dicaffeoylspermidine, trypsin proteinase inhibitors, and trans-α-bergamotene in local and systemic tissue. Moreover, the positive contribution of solar UVB to defense against piercing-sucking herbivores such as T. notatus, but likely not against the chewing herbivore M. sexta associated with strong JA burst, was discovered. In addition, a new sunscreen function of HGL-DTGs under solar UVB exposure was proposed. Finally, the differences in kinetic accumulation of individual HGL-DTGs under two different solar UVB fluences suggested that a combination of laboratory and field experiments are necessary and ...
Molecular response of nicotiana attenuata to herbivory and solar UVB: laboratory and fieldwork
Plants have coexisted with insects for approximately 400 million years. During this time, the interactions between flora and fauna have driven coevolutionary and reciprocal changes, resulting in a complex mosaic of plant defenses and insect counter-defenses. In addition, abiotic stress such as UVB radiation dramatically affects plant performance; therefore, mechanisms to recognize environmental stresses, mounting of properly scaled responses and fitness optimization are three essential features for plant survival in nature. This work describes novel regulatory mechanisms and interactions mediating plant defense against herbivores, and the effect of solar UVB light on plant defense in Nicotiana attenuata. Specifically, I describe the function of three dicer like proteins (NaDCL2, NaDCL3, NaDCL4) in plant development, the regulation of their transcripts during herbivory and their contribution to mediating some defense metabolites such as nicotine and trypsin proteinase inhibitors, possibly via mediating multiple signaling pathways and regulators such as ethylene, JA signaling pathways, mitogen activated protein kinases (MAPKs), and MYB transcription factors. In addition, for the first time, the involvement of ABA signaling and the interaction of ABA-JA signaling were decoded and revealed the crucial function of ABA signaling in regulating herbivory-induced defense metabolites such as HGL-DTGs, caffeoylputrescine, dicaffeoylspermidine, trypsin proteinase inhibitors, and trans-α-bergamotene in local and systemic tissue. Moreover, the positive contribution of solar UVB to defense against piercing-sucking herbivores such as T. notatus, but likely not against the chewing herbivore M. sexta associated with strong JA burst, was discovered. In addition, a new sunscreen function of HGL-DTGs under solar UVB exposure was proposed. Finally, the differences in kinetic accumulation of individual HGL-DTGs under two different solar UVB fluences suggested that a combination of laboratory and field experiments are necessary and ...
Molecular response of nicotiana attenuata to herbivory and solar UVB: laboratory and fieldwork
Dinh, Truong Son (Autor:in) / Baldwin, Ian T. / Oelmüller, Ralf / Binh, Le Tran
01.01.2013
Hochschulschrift
Elektronische Ressource
Englisch
Nicotiana attenuata protein kinases mediate plant growth and resistance to insect herbivores
| BASE | 2012
| BASE | 2014
Fieldwork : Landschaftsarchitektur Europa
| TIBKAT | 2006