Growth and Vegetative Development
Chen, Jianghua , Wen, Jiangqi , Wang, Hongliang , Li, Guangming , Chen, Rujin .
Compound leaf development in Medicago truncatula, a model legume.
Molecular and genetic analysis of mutants in two model plant species, tomato and pea, has led us to a better understanding how compound leaf development is regulated in general. However, in most cases, genes responsible for many interesting compound leaf mutants have not yet been identified from the model species due to their large genome sizes and difficulties in plant transformation. With the ongoing genome sequencing projects and various genetic resources becoming available for two model legume species Lotus japonicus and Medicago truncatula, isolation and molecular cloning of compound leaf mutants become more tractable in the model legume species. To facilitate our study on compound leaf development in M. truncatula, we first characterize the leaf developmental processes into nine distinct developmental stages using Scanning Electron Microscopy. We then isolated and characterized several different types of leaf mutants from two mutant populations, one derived from fast neutron deletion lines and one from Tnt1 insertion lines. Here we report our analysis of the mutant phenotypes and molecular cloning and characterization of isolated leaf mutants. This analysis led us to postulate how compound leaf development is regulated at molecular and genetic levels in M. truncatula. Whether a similar mechanism is recruited during evolution to control compound leaf development in legume species is an interesting topic for future research.
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1 - The Samuel Roberts Noble Foundation, Plant Biology Division, 2510 Sam Noble Parkway, Ardmore, OK, 73401, USA
2 - The Samuel Roberts Noble Foundation
Presentation Type: Plant Biology Abstract
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM