Abstract Detail
Plant-Pathogen Interactions Yang, Huijun [1], Topp, Stephanie [2], Hua, Jian [2]. Toward identifying EBO genes involved in BON1-mediated defense responses. The BON1 family members (BON1, 2 and 3) encode evolutionarily conserved copine proteins and they are negative regulators of cell death and defense responses in Arabidopsis. The bon1 loss-of-function mutant bon1-2 in the Ws background is wild type looking and the loss-of-function mutant of the BON1 family is seedling lethal likely due to activation of programmed cell death. To further understand the biological functions of the BON1 family, we carried out a genetic screen for enhancer of bon1-2 (ebo) by activation tagging. Several ebo mutants were isolated with a bon1-dependent growth and defense phenotype and two of them are further characterized. ebo12 and ebo30 are both dominant mutants with activated defense responses exemplified by PR1 upregulation and increased resistance to virulent pathogens. The growth defect resulting from defense activation in ebo12 and ebo30 can be suppressed by higher temperature. The phenotype of both mutants are linked to the T-DNA and associated with genes flanking the T-DNA. Candidate genes of EBOs are being tested and the role of EBOs in BON1-mediated defense response is being investigated.
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1 - Cornell University, Plant biology, 144 Emerson Hall, Cornell University, Ithaca, NY, 14853, USA
2 - Cornell University, Plant Biology
Keywords:
Plant
defense
temperature response
temperature.
Presentation Type: Plant Biology Abstract
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P15082
Abstract ID:1984 | 