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ContentSnapshots, Annals of Botany, Volume 108, Issue 7, November 2011, Pages i–iii, https://doi.org/10.1093/aob/mcr270
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Flavonols: old compounds for old roles (Review)
doi:10.1093/aob/mcr234
The flavonol branch pathway has remained intact for millions of years, and is almost exclusively involved in the responses of plants to a wide array of stressful agents, despite the fact that evolution of flavonoid metabolism has produced >10 000 structures. Pollastri and Tattini (pp. 1225–1233) discuss the emerging functional roles of flavonols in the responses of present-day plants to different stresses, and consider how they may have performed a wide array of such roles during the colonization of land by plants.
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Chromatin remodelling unravelled in wheat (Research in Context)
doi:10.1093/aob/mcr232
Chromatin remodelling complexes are known to be responsiblefor nucleosome mobility leading to increased accessibility of DNA for binding proteins. Raut et al. (pp. 1235–1246) provide an overview of the subject and investigate histone octamer trans-transfer in partially purified nuclear extracts of wheat, Triticum aestivum. They find ATP-dependent octamer displacement in trans from a histone H1-depleted native donor chromatin of wheat to a labelled synthetic nucleosome positioning sequence, with activity mediated by ATP hydrolysis. The results suggest that wheat nuclei possess a typical chromatin remodelling activity similar to that in other eukaryotes. This is the first report of chromatin remodelling activity in vitro from plants.
