Review: Stomatal development in time: the past and the future ($)

Stomata, epidermal pores for gas exchange, first appeared about 400 million years ago. Since then, there has been functional and structural diversification. Qu et al. synthesize the developmental genetics underpinning diverse stomata, spanning from bryophytes through monocots and the astomatous (without stomata) marine angiosperms, as revealed by seagrass. Curr. Opin. Genet. Devel. 10.1016/j.gde.2017.02.001