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CATEGORIES:Plant Sciences Departmental Seminars
SUMMARY:Functional Macroevolution of Transcription Factors
  in Land Plants - Dr Facundo Romani\, Department o
 f Plant Sciences
DTSTART;TZID=Europe/London:20211028T130000
DTEND;TZID=Europe/London:20211028T140000
UID:TALK162097AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/162097
DESCRIPTION:We use the model liverwort Marchantia polymorpha t
 o understand fundamental questions of evolutionary
  biology. One of the advantages of this model syst
 em is its genome presents low redundancy of transc
 ription factor genes compared to other plant speci
 es. During my PhD thesis\, I studied the molecular
  evolution of the class I homeodomain leucine-zipp
 er (C1HDZ) in Marchantia polymorpha. In flowering 
 plants\, C1HDZ transcription factor function is pr
 imarily associated with abiotic stress responses. 
 However\, loss-of-function alleles of MpC1HDZ (Mpc
 1hdzge) did not exhibit phenotypes associated with
  abiotic stress. Rather\, Mpc1hdzge mutant plants 
 present a reduced number of oil body cells as the 
 most remarkable developmental defect. Oil bodies\,
  a synapomorphy of liverworts\, are organelles in 
 specialized cells that accumulate secondary metabo
 lites\, but their function and development are poo
 rly understood. Using these plants\, we interrogat
 ed the biological function of oil bodies. Briefly\
 , we found Mpc1hdzge are more susceptible to herbi
 vory and cannot accumulate terpenoid compounds. To
 xic compounds accumulated in oil bodies are an imp
 ortant defence strategy against herbivores\, an an
 alogous function to glandular trichomes in floweri
 ng plants. In addition\, C1HDZ genes were co-opted
  to regulate separate responses to biotic and abio
 tic stressors in two distinct land plant lineages.
  Our findings and other works in the field suggest
  that the expression pattern of transcription fact
 or expression is key in their functional macroevol
 ution.\n\n\nContact reception@plantsci.cam.ac.uk f
 or a Zoom link prior to a talk if you are not on o
 ur mailing list. Due to having to go online\, we a
 re restricting the talks to University of Cambridg
 e and alumni to keep them as informal as possible.
LOCATION:Online
CONTACT:Kumari Billakurthi
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