Open AccessCytokinin–CLAVATA cross-talk is an ancient mechanism regulating shoot meristem homeostasis in land plants
Author(s) -
Joseph Cammarata,
Christopher Morales Farfan,
Michael J. Scanlon,
Adrienne Roeder
Publication year - 2022
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.2116860119
Subject(s) - meristem , biology , multicellular organism , cytokinin , moss , shoot , botany , microbiology and biotechnology , apical cell , auxin , cell , genetics , gene
Significance Plants grow from their tips. The gametophore (shoot-like organ) tip of the mossPhyscomitrium patens is a single cell that performs the same functions as those of multicellular flowering plants, producing the cells that make leaves and regenerating new stem cells to maintain the shoot tip. Several pathways, including CLAVATA and cytokinin hormonal signaling, regulate stem cell abundance in flowering plants and in mosses, although the mechanisms whereby these pathways regulate stem cell abundance and their conservation between these plant lineages is poorly understood. Using moss, we investigated howPp CLAVATA and cytokinin signaling interact. Overall, we found evidence thatPp CLAVATA and cytokinin signaling interact similarly in moss and flowering plants, despite their distinct anatomies, life cycles, and evolutionary distance.