B 268, 2211–2220 (2001).ĭoebley, J.F., Gaut, B.S. Floral meristem termination (FMT) is a well-regulated process that ensures the correct number of primordia are produced in a flower, and variation in the timing of FMT provides one of the most important sources of generating floral morphological diversity. Development 142, 2237–2249 (2015).īommert, P., Nagasawa, N.S. Arabidopsis CRC has two orthologs in maize, drooping leaf 1 (drl1) and drl2, which are expressed in leaf primordia and lateral floral primordia, and regulate plant architecture development and floral organ determinacy, respectively (Ishikawa et al., 2009 Strable et al., 2017 Strable and Vollbrecht, 2019 Tian et al., 2019). Furthermore, the authors found that weak fea3 alleles with relaxed restrictions on stem cell proliferation produce larger ears with increased overall yield. Je and co-workers used forward genetics and complementation to discover the leucine-rich-repeat (LRR)-receptor-like protein FASCIATED EAR3 (FEA3), whereupon an elegant combination of reverse genetics coupled with peptide assays identified its candidate ligand, the FON2-LIKE CLE PROTEIN1 (ZmFCP1). In this issue, an article by David Jackson and colleagues identifies a key regulator of stem cell proliferation in maize that responds to a peptide signal produced in lateral organ primordia 4. (BD) The removal of plantlets primordia or primordia with some part of leaves enhanced chlorophyll degradation. Definitions: The organ culture refers to the in vitro culture and maintenance of an excised organ primordia or whole or part of an organ in a way that may allow differentiation and preservation of the architecture and/or function. Genetic variation of these feedback circuits may modulate meristem size and consequently alter grain production and fruit size 2, 3, thus providing target loci for the enhancing yield in crop species. (A) The small etiolated plantlets developed on detached leaves kept in darkness. Let us make in-depth study of the definition, history and importance of the organ culture. This iterative, dynamic process at apical meristems requires persistent maintenance of a stable and organogenically active stem cell population, and finely nuanced, bidirectional communication between these meristematic functional domains 1. New organs develop continuously throughout a plant's life.
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