Network analyses identify a transcriptomic proximodistal prepattern in the maize leaf primordium

第一作者：Samuel Leiboff

第一单位：康奈尔大学

通讯作者：Michael J. Scanlon

 Abstract 

背景回顾：The formation of developmental boundaries is a common feature of multicellular plants and animals, and impacts the initiation, structure and function of all organs.

玉米叶：Maize leaves comprise a proximal sheath that encloses the stem, and a distal photosynthetic blade that projects away from the plant axis. An epidermally derived ligule and a joint‐like auricle develop at the blade/sheath boundary of maize leaves.

提出问题：Mutations disturbing the ligule/auricle region disrupt leaf patterning and impact plant architecture, yet it is unclear how this developmental boundary is established.

主要研究：Targeted microdissection followed by transcriptomic analyses of young leaf primordia were utilized to construct a co‐expression network associated with development of the blade/sheath boundary.

结果：Evidence is presented for proximodistal gradients of gene expression that establish a prepatterned transcriptomic boundary in young leaf primordia, before the morphological initiation of the blade/sheath boundary in older leaves.

结论：This work presents a conceptual model for spatiotemporal patterning of proximodistal leaf domains, and provides a rich resource of candidate gene interactions for future investigations of the mechanisms of blade/sheath boundary formation in maize.

 摘 要 

 通讯作者 

**Michael J. Scanlon**

doi: https://doi.org/10.1111/nph.17132

Journal: New Phytologist

Published online: Jan 12, 2021