Ranunculacean flower terata: Records, a classification, and some clues about floral developmental genetics and evolution

Jabbour, Florian; Nadot, Sophie; Espinosa, Felipe; Damerval, Catherine

doi:10.1016/j.flora.2015.09.009

Cited by 14 publications

(9 citation statements)

References 75 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Quincuncial arrangement reflects the spiral initiation in at least some clades, such as Rosaceae and Ranunculaceae (Foster et al 2003 ; Ren et al 2010 ; De Craene 2010 ). Whorled arrangement, however, is more likely to stabilize floral part numbers than spiral arrangements, since the slight fluctuation in organ-fate determinants observed in intermediate organ morphology (e.g., between tepals and stamens; Gonçalves et al 2013 ; Jabbour et al 2015 ) readily affects the number in spiral arrangements (Kitazawa and Fujimoto 2014 ; Wang et al 2015 ). Whether the spiral arrangement or the whorled arrangement of floral organs is ancestral remains controversial (Endress and Doyle 2015 ).…”

Section: Introductionmentioning

confidence: 99%

Spiral phyllotaxis underlies constrained variation in Anemone (Ranunculaceae) tepal arrangement

Kitazawa

Fujimoto

2018

J Plant Res

View full text Add to dashboard Cite

Stabilization and variation of floral structures are indispensable for plant reproduction and evolution; however, the developmental mechanism regulating their structural robustness is largely unknown. To investigate this mechanism, we examined positional arrangement (aestivation) of excessively produced perianth organs (tepals) of six- and seven-tepaled (lobed) flowers in six Anemone species (Ranunculaceae). We found that the tepal arrangement that occurred in nature varied intraspecifically between spiral and whorled arrangements. Moreover, among the studied species, variation was commonly limited to three types, including whorls, despite five geometrically possible arrangements in six-tepaled flowers and two types among six possibilities in seven-tepaled flowers. A spiral arrangement, on the other hand, was unique to five-tepaled flowers. A spiral phyllotaxis model with stochasticity on initiating excessive primordia accounted for these limited variations in arrangement in cases when the divergence angle between preexisting primordia was less than 144°. Moreover, interspecific differences in the frequency of the observed arrangements were explained by the change of model parameters that represent meristematic growth and differential organ growth. These findings suggest that the phyllotaxis parameters are responsible for not only intraspecific stability but interspecific difference of floral structure. Decreasing arrangements from six-tepaled to seven-tepaled Anemone flowers demonstrate that the stabilization occurs as development proceeds to increase the component (organ) number, in contrast from the intuition that the variation will be larger due to increasing number of possible states (arrangements).Electronic supplementary materialThe online version of this article (10.1007/s10265-018-1025-x) contains supplementary material, which is available to authorized users.

show abstract

Section: Introductionmentioning

confidence: 99%

Spiral phyllotaxis underlies constrained variation in Anemone (Ranunculaceae) tepal arrangement

Kitazawa

Fujimoto

2018

J Plant Res

View full text Add to dashboard Cite

show abstract

“…Stochastic variation in the amount of B and C class genes has been suggested to account for the variation in the final stamen number (Becker, ). Variation in perianth organ number has been described in many species of Ranunculaceae, owing to homeotic transformation and/or stochastic fluctuation in the number of initiated primordia (Jabbour et al ., and references therein). In N. damascena , all floral organs are spirally inserted and number variation has been observed for each type of organ (Wang et al ., ).…”

Section: Floral Diversity In Ranunculalesmentioning

confidence: 99%

Genetics of flower development in Ranunculales – a new, basal eudicot model order for studying flower evolution

Damerval

Becker

2017

New Phytologist

Self Cite

View full text Add to dashboard Cite

Contents 361I.361II.362III.363IV.364V.364Acknowledgements365References365 Summary Ranunculales, the sister group to all other eudicots, encompasses species with a remarkable floral diversity, which are currently emerging as new model organisms to address questions relating to the genetic architecture of flower morphology and its evolution. These questions concern either traits only found in members of the Ranunculales or traits that have convergently evolved in other large clades of flowering plants. We present recent results obtained on floral organ identity and number, symmetry evolution and spur formation in Ranunculales species. We discuss benefits and future prospects of evo‐devo studies in Ranunculales, which can provide the opportunity to decipher the genetic architecture of novel floral traits and also to appraise the degree of conservation of genetic mechanisms involved in homoplasious traits.

show abstract

“…In plant populations, a few examples of naturally occurring floral homeotic mutants have been documented, but they either represent very rare individuals in a population where a selective advantage could not be determined 15 or occur in predominantly selfing or clonal species where they are unlikely to promote reproductive isolation. 16,17 Perhaps the best example to date is a floral homeotic mutant in Capsella bursa-pastoris where petals are converted into stamens.…”

Section: Introductionmentioning

confidence: 99%

Non-pollinator selection for a floral homeotic mutant conferring loss of nectar reward in Aquilegia coerulea

et al. 2022

View full text Add to dashboard Cite

Ranunculacean flower terata: Records, a classification, and some clues about floral developmental genetics and evolution

Cited by 14 publications

References 75 publications

Spiral phyllotaxis underlies constrained variation in Anemone (Ranunculaceae) tepal arrangement

Spiral phyllotaxis underlies constrained variation in Anemone (Ranunculaceae) tepal arrangement

Genetics of flower development in Ranunculales – a new, basal eudicot model order for studying flower evolution

Non-pollinator selection for a floral homeotic mutant conferring loss of nectar reward in Aquilegia coerulea

Contact Info

Product

Resources

About