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SUMMARY:*CANCELLED*: Cortical microtubules shape cell walls to support a w
 ide range of functions  - EE (Eva) Deinum\, Department of Plant Sciences\,
  Wageningen University &amp\; Research
DTSTART:20240129T143000Z
DTEND:20240129T153000Z
UID:TALK210898@talks.cam.ac.uk
CONTACT:Jia CHEN
DESCRIPTION:How plants fulfill their life functions is to a large extend d
 ictated by the presence of cell walls. These cell walls can adopt a wide r
 ange of structures\, depending on the local functional demands -- from str
 etching in a particular direction to reconciling contradictory requirement
 s. A beautiful example of the latter is found in the primary xylem. Differ
 ent patterns of local cell wall reinforcements are used at different stage
 s of development\, in line with different mechanical requirements. The req
 uired anisotropic material properties largely derive from the location and
  orientation of the constituting cellulose microfibrils. These\, in turn a
 re deposited along the cortical microtubule cytoskeleton. \n\nI will descr
 ibe how we use the banded pattern in protoxylem as a model system for comp
 lex cell wall patterns. For this\, we use a diversity of modelling approac
 hes involving both cortical microtubules and Rho-of-Plants (ROP) proteins.
  These deeply conserved small GTPases can establish membrane zones with di
 fferent properties\, leading to local differences in microtubule dynamics.
  Microtubules\, however\, do not simply "read out" this pattern. The final
  pattern arises from the mutual interations of both systems. This work not
  only helped us understand how these beautiful and functionally important 
 patters are formed\, but also brought to light important insights on how t
 he precise distribution of microtubule nucleation plays a critical role in
  maintaining homogeneous microtubule arrays and\, hence\, cell wall integr
 ity. \n\nI will also show some stunning pictures from recent field trips t
 o South Africa and the USA to study/hunt for some very special plants: the
  few known species in the world that display dimorphic enantiostyly\, whic
 h we use as a model system for the de novo establishment a left-right asym
 metry. These plants demonstrate that rich biodiversity we still have in ou
 r world is an incredibly valuable resource even for fundamental cell and d
 evelopmental biology\, though challenging and challenged.   \n\nJoin Zoo
 m Meeting \n\n\nhttps://us06web.zoom.us/j/82089026611?pwd=L2FyclJFL2lYR0J3
 SFBDbHQyUFp6UT09 \n\n  \n\nMeeting ID: 820 8902 6611 \n\nPasscode: 038347 
 \n\n
LOCATION:in person at Sainsbury Laboratory and online
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