Jiang, Guojing and Koppolu, Ravi and Rutten, Twan and Hensel, Goetz and Lundqvist, Udda and Moya, Yudelsy Antonia Tandron and Huang, Yongyu and Rajaraman, Jeyaraman and Poursarebani, Naser and von Wiren, Nicolaus and Kumlehn, Jochen and Mascher, Martin and Schnurbusch, Thorsten (2024) Non-cell-autonomous signaling associated with barley ALOG1 specifies spikelet meristem determinacy. CURRENT BIOLOGY, 34 (11). 2344-2358.e5. ISSN 0960-9822, 1879-0445
Full text not available from this repository. (Request a copy)Abstract
Inflorescence architecture and crop productivity are often tightly coupled in our major cereal crops. However, the underlying genetic mechanisms controlling cereal inflorescence development remain poorly understood. Here, we identified recessive alleles of barley ( Hordeum vulgare L.) HvALOG1 ( Arabidopsis thaliana LSH1 and Oryza G1 ) that produce non -canonical extra spikelets and fused glumes abaxially to the central spikelet from the upper -mid portion until the tip of the inflorescence. Notably, we found that HvALOG1 exhibits a boundaryspecific expression pattern that specifically excludes reproductive meristems, implying the involvement of previously proposed localized signaling centers for branch regulation. Importantly, during early spikelet formation, non -cell -autonomous signals associated with HvALOG1 expression may specify spikelet meristem determinacy, while boundary formation of floret organs appears to be coordinated in a cell -autonomous manner. Moreover, barley ALOG family members synergistically modulate inflorescence morphology, with HvALOG1 predominantly governing meristem maintenance and floral organ development. We further propose that spatiotemporal redundancies of expressed HvALOG members specifically in the basal inflorescence may be accountable for proper patterning of spikelet formation in mutant plants. Our research offers new perspectives on regulatory signaling roles of ALOG transcription factors during the development of reproductive meristems in cereal inflorescences.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SHOOT APICAL MERISTEM; INFLORESCENCE ARCHITECTURE; ZINC-FINGER; GENE FAMILY; ARABIDOPSIS; BOUNDARY; EXPRESSION; FLOWER; DOMESTICATION; IDENTITY |
| Subjects: | 500 Science > 580 Botanical sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften > Lehrstuhl für Zellbiologie und Pflanzenphysiologie (Prof. Dr. Klaus Grasser) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 02 Dec 2025 07:01 |
| Last Modified: | 02 Dec 2025 07:01 |
| URI: | https://pred.uni-regensburg.de/id/eprint/65086 |
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