Kaplan Memorial Lecture
Hake, Sarah .
A new angle on the maize leaf.
The diversity of leaf form results from developmental patterning at early stages of primordia development and provides unique examples of form and function as plants adapt to different environments. Sheaths of grass leaves encircle the younger leaves and meristem, protecting them from herbivores, while the blade portion of the leaf leans back to optimize photosynthesis. At the junction of blade and sheath are the auricles and ligule. The auricles act as hinges to allow the blade to lean away from the stem and the ligule provides a protective barrier. Mutants in maize provide an opportunity to study development of the ligule region. liguleless1 and lg2 are recessive mutants that lack ligule and auricle. The leaves are upright. Wavy auricle in blade is a dominant mutant that misexpresses LG1 in the leaf and causes the leaves to lean farther from the stem. These genes (all transcription factors) also play a role in tassel architecture, changing the angle and number of tassel branches. A fourth mutant is Liguleless narrow, with narrow leaves, reduced ligule, and few upright tassel branches. lgn, which encodes a kinase, provides an opportunity to connect development to genotype by environment – the severity is dependent on temperature and inbred background.
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1 - USDA Gene Expression Laboratory , Albany, CA
Presentation Type: Special Presentation
Location: Summit/Boise Centre
Date: Tuesday, July 29th, 2014
Time: 4:00 PM
Candidate for Awards:None