The pillars of land plants: new insights into stem development

Current Opinion in Plant Biology
Antonio Serrano-Mislata, Robert Sablowski

Abstract

In spite of its central importance in evolution, plant architecture and crop improvement, stem development remains poorly understood relative to other plant organs. Here, we summarise current knowledge of stem ontogenesis and its regulation, including insights from new image analysis and biophysical approaches. The stem initiates in the rib zone (RZ) of the shoot apical meristem, under transcriptional control by DELLA and BLH proteins. Links have emerged between these regulators and cell proliferation, patterning and oriented growth in the RZ. During subsequent internode elongation, cell wall properties and mechanics have been analysed in detail, revealing pectin modification as a prominent control point. Recent work has also highlighted signalling to coordinate growth of stem tissues with different mechanical properties.

Citations

Jan 31, 2019·Journal of Integrative Plant Biology·Sarah M McKim
Dec 16, 2018·Plants·Eva HellmannYkä Helariutta
Feb 1, 2020·Current Biology : CB·Juan Alonso-SerraKaisa Nieminen
Apr 24, 2021·Proceedings of the National Academy of Sciences of the United States of America·Mahwish EjazRobert Sablowski

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