Entries by Mary Williams

Dissecting transposon silencing through introduction of exogenous TEs

Fultz and Slotkin explore the question of how transposable element (TE) silencing is initiated. As they describe, there are two recognized mechanisms, one based on TE identity (meaning that it can be silenced through siRNAs initiated from a related TE, and in which de novo silencing can occur in the absence of mRNA production), and […]

Changes in anthocyanin production during domestication of Citrus

Familiar citrus fruits such as sweet orange, lemon, lime and grapefruit are hybrids of three species: Citrus reticulate (mandarin), C. medica (citron), and C. maxima (pummelo). Cultivated varieties are generally vegetatively propagated, with diversity arising from spontaneous or induced somatic mutations. Butelli et al. previously showed that anthocyanin accumulation in sweet orange is correlated with […]

Importance of fluctuations in light on plant photosynthetic acclimation

Plant growth chambers are indispensable for most plant science researchers, but of course they do not replicate the outdoor environment. Vialet-Chabrand and Matthews et al. explore the effect of realistic, dynamic fluctuating light (for example as influenced by clouds and leaves) versus light provided in more static conditions (square wave). Plants grown under fluctuating light […]

Review: Mycorrhizal ecology and evolution: the past, present and the future

There are about 50,000 fungal species that form mycorrhizal associations with about 250,000 plant species. These associations significantly increase plant productivity by increasing nutrient uptake, particularly nitrogen and phosphorus, although with a considerable carbon cost to plants. Van der Heijden et al. review the ecology and evolution of mycorrhizal associations, focusing on their biodiversity and […]

Review: Isoprene research – 60 years later, the biology is still enigmatic ($)

Sixty years ago, the first report of isoprene (C5H8; 2-methyl-1,3-butadiene) emissions from plants was published. Isoprenes are the largest source of non-methane hydrocarbons in Earth’s atmosphere; furthermore, isoprene is reactive in atmospheric chemistry and can be converted into a variety of harmful compounds. Sharkey and Monson provide a historical overview of the development of our […]