Plant aerial architecture is the result of a regulated and dynamic process, comprising shoot branching, leaf and flower phyllotaxis, and reproduction. Shoot organogenesis and architecture are direct outcomes of shoot apical meristem activity, which is largely controlled by plant hormones.
Plant hormones are essential regulators of plant development and instrumental in defining plant organogenesis. One of the major hormones is auxin, which contributes to shaping the plant above and below ground. The pattern of production, transport, and signaling of the auxin molecule within a plant tissue is instrumental to various aspects of organogenesis and shoot morphogenesis. Cytokinins, and their interaction with auxins and gibberellins, are also important hormones that contribute to stem cell maintenance in the shoot apical meristem, while shoot branching is controlled by strigolactones and their crosstalk with auxins and cytokinins. Brassinosteroids and auxins regulate morphogenesis by defining organ boundaries and organ separation, and gibberellins promote flowering and, together with brassinosteroids, synchronize growth to the circadian clock (photo- and skotomorphogenesis).
The hormonal influence on aerial plant architecture is regulated at different levels. Upstream regulators of hormone production, transport, and signaling determine when, where, and how hormones accumulate (or not) to activate developmental responses. These regulators may be at epigenetic, transcriptional, post-transcriptional, and post-translational levels. Such mechanisms may be conserved in different plant species and during in vitro plant organogenesis in somatic embryo development or tissue regeneration.
This Research Topic focuses on recent advances in understanding the role of hormone-dependent regulatory mechanisms during the formation of aerial plant structures. Original Research Articles, Reviews, and Mini-Reviews, which cover topics linking the upstream regulation of the hormones and their signaling outputs with the formation of aerial organs, are welcomed. Topic subjects may include:
• Transcriptional and post-transcriptional regulation of hormone production and signaling for organogenesis;
• Effect of hormones in shaping plants (plant and organ levels);
• Plant hormones in shoot regeneration and somatic embryogenesis;
• Hormonal crosstalk in organogenic processes;
• Epigenetic regulation of hormone-dependent organogenesis.
Plant aerial architecture is the result of a regulated and dynamic process, comprising shoot branching, leaf and flower phyllotaxis, and reproduction. Shoot organogenesis and architecture are direct outcomes of shoot apical meristem activity, which is largely controlled by plant hormones.
Plant hormones are essential regulators of plant development and instrumental in defining plant organogenesis. One of the major hormones is auxin, which contributes to shaping the plant above and below ground. The pattern of production, transport, and signaling of the auxin molecule within a plant tissue is instrumental to various aspects of organogenesis and shoot morphogenesis. Cytokinins, and their interaction with auxins and gibberellins, are also important hormones that contribute to stem cell maintenance in the shoot apical meristem, while shoot branching is controlled by strigolactones and their crosstalk with auxins and cytokinins. Brassinosteroids and auxins regulate morphogenesis by defining organ boundaries and organ separation, and gibberellins promote flowering and, together with brassinosteroids, synchronize growth to the circadian clock (photo- and skotomorphogenesis).
The hormonal influence on aerial plant architecture is regulated at different levels. Upstream regulators of hormone production, transport, and signaling determine when, where, and how hormones accumulate (or not) to activate developmental responses. These regulators may be at epigenetic, transcriptional, post-transcriptional, and post-translational levels. Such mechanisms may be conserved in different plant species and during in vitro plant organogenesis in somatic embryo development or tissue regeneration.
This Research Topic focuses on recent advances in understanding the role of hormone-dependent regulatory mechanisms during the formation of aerial plant structures. Original Research Articles, Reviews, and Mini-Reviews, which cover topics linking the upstream regulation of the hormones and their signaling outputs with the formation of aerial organs, are welcomed. Topic subjects may include:
• Transcriptional and post-transcriptional regulation of hormone production and signaling for organogenesis;
• Effect of hormones in shaping plants (plant and organ levels);
• Plant hormones in shoot regeneration and somatic embryogenesis;
• Hormonal crosstalk in organogenic processes;
• Epigenetic regulation of hormone-dependent organogenesis.
