Floral development in three species of Acacia (Leguminosae, Mimosoideae)

Gómez-Acevedo, Sandra Luz; Magallón, Susana; Rico-Arce, Lourdes

doi:10.1071/bt05155

Cited by 22 publications

(25 citation statements)

References 29 publications

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“…In this subfamily the calyx stops growing early, and the sole protective structure of the enlarging bud is provided by the valvately aestivated petals (Fig. 8G–I; see also Gemmeke, 1982; Ramírez‐Domenech and Tucker, 1989; Prenner, 2004c; Gómez‐Acevedo et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Towards unlocking the deep nodes of Leguminosae: Floral development and morphology of the enigmatic Duparquetia orchidacea (Leguminosae, Caesalpinioideae)

Prenner

Klitgaard

2008

American J of Botany

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Duparquetia orchidacea (Caesalpinioideae-Cassieae-Duparquetiinae) is a monotypic liana from tropical West Africa. Its highly unusual, zygomorphic flowers, the unique pollen morphology, and the lack of vestured pits in the wood correspond with previous phylogenetic studies that resolved the position of the species to an isolated position among the early-branching Leguminosae. Here we present a detailed analysis of floral morphology and development to clarify open questions of its floral organization. We provide new data that can be useful in clarifying phylogenetic relationships among early branching Leguminosae and improve our understanding of floral evolution in this large and important plant family. For comparison, we also present developmental data for other Fabales. Our analysis reveals some unusual and in parts unique developmental patterns, such as strict acropetal organ formation, loss and suppression of floral organs, and early petal enlargement. We interpret alternating left-right symmetries in floral development as clues to a spiral organ formation in ancestral taxa. Early asymmetry of the young carpel helps to interpret enantiostyly of other Leguminosae as an example of imprinted shape. Finally, we show that cochlear-descending petal aestivation in Duparquetia and in Papilionoideae is based on different ontogenetic patterns and therefore is most probably nonhomologous.

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Section: Discussionmentioning

confidence: 99%

Towards unlocking the deep nodes of Leguminosae: Floral development and morphology of the enigmatic Duparquetia orchidacea (Leguminosae, Caesalpinioideae)

Prenner

Klitgaard

2008

American J of Botany

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“…exhibited reversed unidirectional order of stamen, and petal and stamen initiation, respectively (Tucker 2003i3). The sepal initiation is reversed unidirectional in mimosoids Acacia berlandieri ( Gómez-Acevedo et al 2007) and Calliandra angustifolia (Prenner lOOAa). In papilionoids, this condition is found in Daviesia cordata for outer stamen initiation (Prenner 1004b) and for sepal or stamen initiation in six species of Adesmia (Moco and Mariath 2009).…”

Section: Discussionmentioning

confidence: 98%

Elucidating Enigmatic Floral Issues inCopaifera langsdorffiiDesf. (Leguminosae, Caesalpinioideae)

Pedersoli¹,

Paulino²,

Leite³

et al. 2010

International Journal of Plant Sciences

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This study focuses on the floral development of Copaifera langsdorffii to elucidate uncertain features in its floral morphology, such as the tetramerous calyx, lack of petals, blackened anthers and their supposed sterility, as well as polyembryony. Buds and flowers were dissected and prepared for examination under scanning electron and light microscopes. The floral apex initiates two bracteoles, five sepals, five petals, five outer stamens, five inner stamens, and one carpel. Order is helical for sepals, reversed unidirectional for the petals, and unidirectional for two whorls of stamens. The tetramerous calyx results from the union of two adaxial sepal primordia, which forms one large sepal and three other smaller sepals. Although the flower lacks petals, the petal primordia are initiated but do not elongate like the other floral organs, remaining as petal rudiments. Ten stamens are formed in two distinct whorls. Formation within each whorl is almost simultaneous, and the inner whorl is formed shortly after the outer. During organ elongation, the inner stamen primordia bases are reoriented outward, resulting in a single whorl of stamens. The darkened anthers have viable pollen grains. Thus, there is no relation between sterility and the dark coloration of the anthers. No signs of extranumerary embryos are observed; therefore, polyembryony is not confirmed. Although studies on floral development of Detarieae have been reported, few Neotropical genera of the tribe (such as Copaifera) have been studied.

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“…In polysymmetric flowers (e.g., Acacia, Gleditsia), orienta tion of a single carpel is highly variable (Gómez-Acevedo et al 2007). In particular individuals of Gleditsia, most of car pels develop with lateral or even abaxial, i.e.…”

Section: Spatial Orientation Of Gynoecium In Legumes and Beyond: Commentary To The Paper Of Wang Et Al (2021)mentioning

confidence: 99%

Spatial orientation of gynoecium in legumes and beyond: Commentary to the paper of Wang et al. (2021)

Sinjushin¹

2021

Bot Pac

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The third largest angiosperm family, Leguminosae, exhibits a relatively wide range of variation in morphology of gynoecium. Some of gynoecial patterns found in this taxon are of special interest, as they resemble ones previously described in the earliest angiosperms. The different orientations of carpels in legumes appear easily switchable through changes in flower symmetry and floral meristem sizes. Regardless of orientation of a single carpel with respect to the inflorescence axis, the placenta-bearing suture invariably remains adaxial as related to the floral axis. This conclusion relaxes the existing controversies between the supposed megasporophyll- derived nature of the carpel and observed diversity of placentation in known Mesozoic angiosperms.

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Floral development in three species of Acacia (Leguminosae, Mimosoideae)

Cited by 22 publications

References 29 publications

Towards unlocking the deep nodes of Leguminosae: Floral development and morphology of the enigmatic Duparquetia orchidacea (Leguminosae, Caesalpinioideae)

Towards unlocking the deep nodes of Leguminosae: Floral development and morphology of the enigmatic Duparquetia orchidacea (Leguminosae, Caesalpinioideae)

Elucidating Enigmatic Floral Issues inCopaifera langsdorffiiDesf. (Leguminosae, Caesalpinioideae)

Spatial orientation of gynoecium in legumes and beyond: Commentary to the paper of Wang et al. (2021)

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