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Full-Text Articles in Life Sciences
Characterization Of Putative Defense Genes In Nonvascular Plants, Blaine Harlan
Characterization Of Putative Defense Genes In Nonvascular Plants, Blaine Harlan
Undergraduate Honors Thesis Collection
Vascular plants have many known defenses against herbivory and pathogen infection. One inducible defense system that has been extensively studied in vascular plants is systemic acquired resistance (SAR), which is a plant-wide response that results in resistance to a wide range of pathogens Many genes that play a role in SAR have been characterized. Although several studies of plant-pathogen interactions in non-vascular plants have occurred, it was not until recently that the existence of SAR was shown in these plants. The goal of the present study was to confirm the presence of homologous defense genes in moss, and to study …
Characterization Of The Role Of Salicylic Acid In Plant-Pathogen Interactions In Moss, Erica Grabinski
Characterization Of The Role Of Salicylic Acid In Plant-Pathogen Interactions In Moss, Erica Grabinski
Undergraduate Honors Thesis Collection
The central objective of this project is to explore defense systems that are induced in two moss species, Amblystegium serpens and Physcomitrella patens, upon inoculation with the fungus, Pythium irregulare. In vascular plants, systemic defense is associated with the plant hormone salicylic acid (SA). I hypothesize that when the moss are treated exogenously with SA, the organisms will undergo a systemic defense response, which will involve the induction of defense-related genes and increased resistance to future P. irregulare infection, that is directly correlated with the amount of hormone applied. If the role of SA in plant defense in A. serpens …
Pathogen Induced Hypersensitive Response And Systemic Acquired Resistance In The Moss Amblystegium Serpens, Collin Elliot Bowman
Pathogen Induced Hypersensitive Response And Systemic Acquired Resistance In The Moss Amblystegium Serpens, Collin Elliot Bowman
Undergraduate Honors Thesis Collection
The moss Amblystegium serpens and the pathogenic fungus Pythium irregulare were used to study plant-pathogen interactions in a non-vascular plant. The major findings in this report include that P. irregulare does infect A. serpens but entire moss death was not noted, 25°C is the optimum temperature for P. irregulare appressoria formation, most appressoria were found on A. serpens leaves, and the SAR response within A. serpens seems to be reducing the number of P. irregulare penetrated moss cells. Future research on the pathogen defense mechanisms of A. serpens is important and promising. When we elucidate these complex chemical processes in …