Contents

23 February 2021
Vol 14, Issue 671

About The Cover

Cover image expansion

Online Cover This week features a Research Article that demonstrates that systemic ROS signaling in response to localized light stress in Arabidopsis thaliana enhances stress tolerance throughout the plant and requires proteins that mediate the rapid enlargement of plasmodesmata pores. The image is an electron micrograph showing adjacent plant cells connected by an M-shaped plasmodesma, which crosses the cell walls and connects the cytoplasm of the two cells. [Image: Fichman et al./Science Signaling]