The Role of TCP Transcription Factors in Shaping Flower Structure, Leaf Morphology, and Plant Architecture

Nicolas, Michaël; Cubas, Pilar

doi:10.1016/b978-0-12-800854-6.00016-6

Cited by 34 publications

(45 citation statements)

References 176 publications

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“…Interestingly, although in TCP tendril‐less lineages ( TEN and CmTCP ) tendrils are replaced by branch‐like organs, in the GCN5 lineage ( tendril‐less1 ) tendrils are completely absent and no other organ develops in their place. TCP genes are involved in plant development and cell proliferation (Nicolas & Cubas, ). CmTCP1/TEN belongs, to the subgroup CYC1 of the Class II TCP gene family (Mizuno et al ., ; Dhaka et al ., ).…”

Section: Molecular Control Of Shoot‐derived Tendrils In Cucurbitaceaementioning

confidence: 99%

The molecular control of tendril development in angiosperms

et al. 2018

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The climbing habit has evolved multiple times during the evolutionary history of angiosperms. Plants evolved various strategies for climbing, such as twining stems, tendrils and hooks. Tendrils are threadlike organs with the ability to twine around other structures through helical growth; they may be derived from a variety of structures, such as branches, leaflets and inflorescences. The genetic capacity to grow as a tendrilled climber existed in some of the earliest land plants; however, the underlying molecular basis of tendril development has been studied in only a few taxa. Here, we summarize what is known about the molecular basis of tendril development in model and candidate model species from key tendrilled families, that is, Fabaceae, Vitaceae, Cucurbitaceae, Passifloraceae and Bignoniaceae. Studies on tendril molecular genetics and development show the molecular basis of tendril formation and ontogenesis is diverse, even when tendrils have the same ontogenetic origin, for example leaflet-derived tendrils in Fabaceae and Bignoniaceae. Interestingly, all tendrils perform helical growth during contact-induced coiling, indicating that such ability is not correlated with their ontogenetic origin or phylogenetic history. Whether the same genetic networks are involved during helical growth in diverse tendrils still remains to be investigated.

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Section: Molecular Control Of Shoot‐derived Tendrils In Cucurbitaceaementioning

confidence: 99%

The molecular control of tendril development in angiosperms

et al. 2018

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“…The TCP gene family has been amplified throughout plant evolution; lycophytes have five to six members, while eudicots usually have more than 20. TCP genes control flower, leaf, and lateral shoot development by modulating cell growth and proliferation patterns in meristems and lateral organs [4]. Some members of this family, in particular, some class II proteins, participated in the evolution of key morphological traits such as floral zygomorphy (CYCLOIDEA) and lateral branch suppression (Teosinte branched1) in natural conditions and during domestication, respectively [4].…”

Section: Introductionmentioning

confidence: 99%

“…Developmental genes, many of which encode transcription factors (TFs), usually belong to large families as a result of successive gene amplification and divergence. One such family is that of the plant-specific TCP genes, named for the founder members TEOSINTE BRANCHED1, CYCLOIDEA, and PROLIFERATING CELL FACTOR [4,5].…”

Section: Introductionmentioning

confidence: 99%

A Recently Evolved Alternative Splice Site in the BRANCHED1a Gene Controls Potato Plant Architecture

et al. 2015

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Amplification and diversification of transcriptional regulators that control development is a driving force of morphological evolution. A major source of protein diversity is alternative splicing, which leads to the generation of different isoforms from a single gene. The mechanisms and timing of intron evolution nonetheless remain unclear, and the functions of alternative splicing-generated protein isoforms are rarely studied. In Solanum tuberosum, the BRANCHED1a (BRC1a) gene encodes a TCP transcription factor that controls lateral shoot outgrowth. Here, we report the recent evolution in Solanum of an alternative splice site in BRC1a that leads to the generation of two BRC1a protein isoforms with distinct C-terminal regions, BRC1a(Long) and BRC1a(Short), encoded by unspliced and spliced mRNA, respectively. The BRC1a(Long) C-terminal region has a strong activation domain, whereas that of BRC1a(S) lacks an activation domain and is predicted to form an amphipathic helix, the H domain, which prevents protein nuclear targeting. BRC1a(Short) is thus mainly cytoplasmic, while BRC1a(Long) is mainly nuclear. BRC1a(Long) functions as a transcriptional activator, whereas BRC1a(Short) appears to have no transcriptional activity. Moreover, BRC1a(Short) can heterodimerize with BRC1a(Long) and act as a dominant-negative factor; it increases BRC1a(Long) concentration in cytoplasm and reduces its transcriptional activity. This alternative splicing mechanism is regulated by hormones and external stimuli that control branching. The evolution of a new alternative splicing site and a novel protein domain in Solanum BRC1a led to a multi-level mechanism of post-transcriptional and post-translational BRC1a regulation that effectively modulates its branch suppressing activity in response to environmental and endogenous cues.

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“…So far, the phylogenetic relationships amongst basal eudicot (comprising the orders Ranunculales, Proteales, Trochodendrales, Buxales and Gunnerales) CYC ‐like genes (called TCP/CYL genes hereafter) and their affinities with Pentapetalae homologs are both poorly understood (Citerne et al ., ; Horn et al ., ). Although functional studies in Pentapetalae and monocots have revealed highly conserved developmental roles for CYC/TB1‐like regulators in the control of shoot branching as well as flower symmetry (Nicolas & Cubas, ), their roles in basal eudicots are largely unknown.…”

Section: Introductionmentioning

confidence: 99%

Evolutionary diversification of CYC/TB1‐like TCP homologs and their recruitment for the control of branching and floral morphology in Papaveraceae (basal eudicots)

et al. 2018

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Angiosperms possess enormous morphological variation in plant architectures and floral forms. Previous studies in Pentapetalae and monocots have demonstrated the involvement of TCP domain CYCLOIDEA/TEOSINTE BRANCHED1-like (CYC/TB1) genes in the control of floral symmetry and shoot branching. However, how TCP/CYC-like (CYL) genes originated, evolved and functionally diversified remain unclear. We conducted a comparative functional study in Ranunculales, the sister lineage to all other eudicots, between Eschscholzia californica and Cysticapnos vesicaria, two species of Papaveraceae with actinomorphic and zygomorphic flowers, respectively. Phylogenetic analysis indicates that CYL genes in Papaveraceae form two paralogous lineages, PapaCYL1 and PapaCYL2. Papaveraceae CYL genes show highly diversified expression patterns as well as functions. Enhanced branching by silencing of EscaCYL1 suggests that the role of CYC/TB1-like genes in branching control is conserved in Papaveraceae. In contrast to the arrest of stamen development in Pentapetalae, PapaCYL genes promote stamen initiation and growth. In addition, we demonstrate that CyveCYLs are involved in perianth development, specifying sepal and petal identity in Cysticapnos by regulating the B-class floral organ identity genes. Our data also suggest the involvement of CyveCYL genes in the regulation of flower symmetry in Cysticapnos. Our work provides evidence of the importance of TCP/CYC-like genes in the promotion of morphological diversity across angiosperms.

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The Role of TCP Transcription Factors in Shaping Flower Structure, Leaf Morphology, and Plant Architecture

Cited by 34 publications

References 176 publications

The molecular control of tendril development in angiosperms

The molecular control of tendril development in angiosperms

A Recently Evolved Alternative Splice Site in the BRANCHED1a Gene Controls Potato Plant Architecture

Evolutionary diversification of CYC/TB1‐like TCP homologs and their recruitment for the control of branching and floral morphology in Papaveraceae (basal eudicots)

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