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Biology Dept.

Our current ignorance of most of the mechanisms involved in plant iron homeostasis is a major obstacle in devising approaches for biofortification of staple foods with iron. Biofortification refers to the genetic engineering of staple crops to accumulate additional bioavailable iron in edible parts, and is widely regarded as a sustainable means of improving the iron nutrition of the 2-3 billion people worldwide (World Health Organization) whose inadequate diet causes iron deficiency anemia.

This proposal is about programmed cell death and sex determination in maize and the grass family. Programmed cell death is best defined as genetically encoded, actively controlled cellular suicide. Programmed cell death is of fundamental importance in plant development. For example, xylem cells undergo programmed cell death and create an interconnected network of hollow tubes essential for water transport.

Increased use of biomass fuels is a promising option for renewable fuels that could decrease our dependence on oil and reduce greenhouse gases. Unfortunately, we currently do not have clear knowledge about the plant traits that should be considered bioenergy traits and should be subjected to breeding and selection. We propose to use a grass energy model organism (Brachypodium distachyon), and treatment with two promising plant biomass transformation techniques (biological and thermochemical conversion) to examine the effect of natural diversity on biofuel production efficiency.

Armored scale insects (Hemiptera: Diaspididae) include many destructive pests of orchard crops, forestry, horticulture, and agriculture (Kennett et al., 1990), costing an estimated two billion dollars per year in the US (Miller & Davidson, 2005). They also have an extraordinary tendency to be invasive. As of 2005, the US had 132 species of diaspidids introduced from other countries (Miller et al., 2005), comprising fully 40% of the known US armored scale insect fauna. Of these, 85 (64%) were considered pests.


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