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Showing posts from July, 2025

X-rays and Barley Mutants!

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Blog readers may be familiar with the botanical terms monocots and dicots. Dicots include many woody species, and monocots include important cereal crops such as wheat and barley (i.e. grasses). These are basics of plant biology that I teach my students in environmental archaeology. Monocots such as cereals of course are central in archaeological research around the origins of agriculture and domestication, whilst dicots feature in studies of ancient fuel use.  One of the major differences between monocots and dicots is the organisation of the stem. Dicot stems, or cambium, have radial growth, that forms the distinct rings that we use for dendrochronology. This growth is controlled by the interaction of two proteins, TDIF and PXY. Monocots do not have a cambium, but they do have the genes for TDIF and PXY. What then, is the function of these genes in monocots, if not to produce cambium? This question is the basis of a major BBSRC funded project I've been involved in for t...