Evolutionary History of the Leguminous Flower

Sinjushin, Andrey

doi:10.1134/s2079086421040083

Cited by 7 publications

(4 citation statements)

References 74 publications

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“…The ancestral floral groundplan of the Leguminosae (pentamerous and pentacyclic monosymmetric flower) changes significantly in different lineages of this outstandingly diverse family [ 9 ]. Evolutionary innovations such as polyandry, multicarpelly, fusion of different floral parts, homeosis, reduction of petals and/or stamens in certain positions, as well as transition to polysymmetry, arose independently in many clades [ 9 ]. However, the nectar remains the principal attractant for pollinators.…”

Section: Discussionmentioning

confidence: 99%

“…For both reasons, numerous leguminous mutants with anomalies in flower development are known (e.g., [ 8 ]). As compared with Brassicaceae, flowers are much more diverse in Leguminosae with respect to their symmetry, merism, synorganization between different domains, as well as different patterns of multiplication and reduction of various floral parts [ 9 ]. Although not many legumes have been characterized regarding structure of their FNs, studies in three aforementioned model genera indicate that their FNs are of different morphology than those of Arabidopsis [ 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

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Phenotypes of Floral Nectaries in Developmental Mutants of Legumes and What They May Tell about Genetic Control of Nectary Formation

Sinjushin

2022

Biology

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The vast majority of angiosperms attracts animal pollinators with the nectar secreted through specialized floral nectaries (FNs). Although there is evidence that principal patterns of regulation of FN development are conserved in large angiosperm clades, these structures are very diverse considering their morphology and position within a flower. Most data on genetic control of FN formation were obtained in surveys of a model plant species, Arabidopsis thaliana (Brassicaceae). There are almost no data on genetic factors affecting FN development in Leguminosae, the plant family of a high agricultural value and possessing outstandingly diverse flowers. In this work, the morphology of FNs was examined in a set of leguminous species, both wild-type and developmental mutants, by the means of a scanning electron microscopy. Unlike Brassicaceae, FNs in legumes are localized between stamens and a carpel instead of being associated with a certain floral organ. FNs were found stable in most cases of mutants when perianth and/or androecium morphology was affected. However, regulation of FN development by BLADE-ON-PETIOLE-like genes seems to be a shared feature between legumes (at least Pisum) and Arabidopsis. In some legumes, the adaxial developmental program (most probably CYCLOIDEA-mediated) suppresses the FN development. The obtained results neither confirm the role of orthologues of UNUSUAL FLORAL ORGANS and LEAFY in FN development in legumes nor reject it, as two studied pea mutants were homozygous at the weakest alleles of the corresponding loci and possessed FNs similar to those of wild-type.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phenotypes of Floral Nectaries in Developmental Mutants of Legumes and What They May Tell about Genetic Control of Nectary Formation

Sinjushin

2022

Biology

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“…In S. grandistipula, S. polyphylla, and S. riparia, carpel initiation occurred before the initiation of all stamen primordia, a common condition in Leguminosae (Tucker 1987). The adaxial orientation of the carpel cleft is also usual in Leguminosae (Sinjushin 2021;Tucker 1987), with some exceptions reported in Caesalpinioideae: Ceratonia siliqua L. (Tucker 1992b), Gleditsia J. Clayton (Tucker 1991), A. baileyana (Derstine and Tucker 1991), A. saligna, S. berlandieri, V. pennatula (Gómez-Acevedo et al 2007)d cornigera (Gomez-Acevedo 2021). Likewise, slight lateral carpel cleft deviations of the adaxial side have been previously described in some genera of Papilionoideae (Prenner 2004b).…”

Section: Gynoecium Featuresmentioning

confidence: 94%

“…In this study, S. grandistipula also presented unusual orientations of the carpel cleft (abaxial and lateral). These erratic initiation patterns are associated with radially symmetric taxa (Sinjushin 2021;Tucker 1999). It's noteworthy that an experiment conducted on mutants of the Antirrhinum majus L., without expression of the laterodorsal domain, resulted in ventralization.…”

Section: Gynoecium Featuresmentioning

confidence: 99%

Floral ontogeny reveals synapomorphies for Senegalia sect. Monacanthea p.p. (Leguminosae)

Alvarado-Reyes,

Paulino,

Terra

et al. 2024

Preprint

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The genus Senegalia was recently described as non-monophyletic; however, its sections exhibit robust monophyletic support, suggesting a potential reclassification into separate genera. Senegalia sect. Monocanthea p.p. is the largest section and contains 164 species of pantropical distribution and includes all of the current 99 neotropical species of Senegalia; however, no morphological characteristics are available to differentiate this section. To characterize this section, we examined floral developmental traits in four species of Senegalia sect. Monocanthea p.p. These traits were previously considered as potentially distinguishing features within Acacia s.l. and include the onset patterns of the androecium, the timing of calyx union, the origin of the staminal disc, and the presence of stomata on the petals. Furthermore, we analyzed previously unexplored traits, such as corolla union types, inflorescence development, and micromorphological features related to the indumentum, as well as the presence and location of stomata. All these characters were analyzed in the context of the relationships among the studied species. The characteristics proposed as potential synapomorphies of the group include the postgenital fusion of the corolla and the presence of a staminal disc formed at the base of the filaments. The other analyzed floral characteristics were not informative for the characterization of the group and exhibited limited correlation with the phylogenetic position of the Senegalia species. Future studies of floral ontogeny will help to establish more precise patterns, mainly whether corolla union and staminal tube formation occur similarly in African and Asian sections of Senegalia.

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Unequal stability of different parts in the flag blossom (Leguminosae) with notes on factors affecting variability of pentamerous pentacyclic angiosperm flowers

Sinjushin

2022

Plant Syst Evol

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Evolutionary History of the Leguminous Flower

Cited by 7 publications

References 74 publications

Phenotypes of Floral Nectaries in Developmental Mutants of Legumes and What They May Tell about Genetic Control of Nectary Formation

Phenotypes of Floral Nectaries in Developmental Mutants of Legumes and What They May Tell about Genetic Control of Nectary Formation

Floral ontogeny reveals synapomorphies for Senegalia sect. Monacanthea p.p. (Leguminosae)

Unequal stability of different parts in the flag blossom (Leguminosae) with notes on factors affecting variability of pentamerous pentacyclic angiosperm flowers

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