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Related Experiment Videos

The tangled-1 mutation alters cell division orientations throughout maize leaf development without altering leaf

L G Smith1, S Hake, A W Sylvester

  • 1USDA/UC Berkeley Plant Gene Expression Center, Albany, CA 94710, USA.

Development (Cambridge, England)
|February 1, 1996
PubMed
Summary
This summary is machine-generated.

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Plant organ shape generation is not dependent on precise cell division orientation. Maize tangled-1 (tan-1) mutations show abnormal cell divisions but maintain normal leaf shape, supporting regional control mechanisms.

Area of Science:

  • Plant Biology
  • Developmental Biology
  • Genetics

Background:

  • Cell division orientation is traditionally considered crucial for plant organ shape due to fixed cell walls.
  • An alternative hypothesis suggests regional control mechanisms may govern shape independently of cell division orientation.

Purpose of the Study:

  • To investigate the role of cell division orientation in maize leaf shape determination.
  • To examine the effects of the tangled-1 (tan-1) mutation on cell division and leaf morphology.

Main Methods:

  • Analysis of the recessive maize mutation tangled-1 (tan-1).
  • Observation of cell division patterns and leaf shape throughout development in wild-type and mutant plants.

Main Results:

Related Experiment Videos

  • The tan-1 mutation causes aberrant cell division orientations in maize leaves without affecting overall leaf shape.
  • Transverse cell divisions occur at normal frequencies, while longitudinal divisions are replaced by misoriented divisions.
  • Mutant leaves exhibit slower growth but retain normal morphology.

Conclusions:

  • Maize leaf shape generation is independent of precise spatial control of cell division orientation.
  • These findings support the existence of shape-generating mechanisms that operate independently of cell division orientation during plant development.