Leaf anatomical features of the Eriosema campestre Benth. (Leguminosae, Papilionoideae, Phaseoleae) complex and potential taxonomic implications

Seixas, Diana Pacheco; Fortuna-Perez, Ana Paula; Rodrigues, Tatiane Maria

doi:10.1016/j.flora.2019.03.011

Cited by 12 publications

(1 citation statement)

References 25 publications

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“…Petiole anatomy has been identi ed by several taxonomists as the most variable and important character for species delimitations and generic groupings (Deghan 1982; Martínez-Cabrera et al2009;Talip et al 2017;Seixas et al 2019), including the delimitation of new species of Senna(Souto et al 2021). Petiole shape was also found to be taxonomically important for differentiating between the species of other Leguminosae genera, such as Baphia Lodd (Soladoye 1982),.…”

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Taxonomic implications of the leaf anatomy of twelve species of Senna ser. Bacillares (Leguminosae) from northeastern Brazil

Souto,

Silva,

Santos

et al. 2023

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The leaf anatomy of twelve species of Senna ser. Bacillares (Leguminosae) from northeastern Brazil was examined to provide taxonomic support for the group. Forty-three specimens were analyzed using light microscopy, following the usual techniques in plant anatomy. Four different petiole profiles were observed: circular, semicircular, hexagonal, and pentagonal; most petioles showed adaxial projections, those being strongly prominent in S. chrysocarpa and S. quinquangulata. Six different leaf rachis profiles were observed: pentagonal, elliptic, obovate, circular, semicircular, and irregularly triangular. The vascular systems of the petioles and leaf rachisies showed similar patterns, forming 4-7 central bundles and two accessory bundles. The midrib was plane-convex in all species, with an arched vascular bundle surrounded by sclerenchyma. The dorsiventral mesophyll has a uniseriate palisade, with 4-7-seriate spongy parenchyma. Five different leaflet edge outlines were observed: rounded, recurved, acute, acuminate, and truncate; the truncate type was exclusive to S. angulate, while S. gardneriwas acuminate. Idioblasts of druses and prismatic crystals were observed in the petioles, leaf rachises, and midribs of all species; crystalline sand was observed in the petioles and leaf rachises of S. angulata and S. pluribracteata, in the petiole of S. gardneri, and in the rachis of S. splendida. The sets of different anatomical characters of the petioles, leaf rachises, and leaflet edges of all of the species studied provided additional support to the taxonomy of Sennaser. Bacillares and reinforced the importance of anatomical studies to the taxonomy and systematics of this group.

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confidence: 99%

Taxonomic implications of the leaf anatomy of twelve species of Senna ser. Bacillares (Leguminosae) from northeastern Brazil

Souto,

Silva,

Santos

et al. 2023

Preprint

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Glandular trichomes of Robinia viscosa Vent. var. hartwigii (Koehne) Ashe (Faboideae, Fabaceae)—morphology, histochemistry and ultrastructure

Konarska

Łotocka

2020

Planta

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Main Conclusion Permanent glandular trichomes of Robinia viscosa var. hartwigii produce viscous secretion containing several secondary metabolites, as lipids, mucilage, flavonoids, proteins and alkaloids. Abstract Robinia viscosa var. hartwigii (Hartweg’s locust) is an ornamental tree with high apicultural value. It can be planted in urban greenery and in degraded areas. The shoots, leaves, and inflorescences of this plant are equipped with numerous persistent glandular trichomes producing sticky secretion. The distribution, origin, development, morphology, anatomy, and ultrastructure of glandular trichomes of Hartweg's locust flowers as well as the localisation and composition of their secretory products were investigated for the first time. To this end, light, scanning, and transmission electron microscopy combined with histochemical and fluorescence techniques were used. The massive glandular trichomes differing in the distribution, length, and stage of development were built of a multicellular and multiseriate stalk and a multicellular head. The secretory cells in the stalk and head had large nuclei with nucleoli, numerous chloroplasts with thylakoids and starch grains, mitochondria, endoplasmic reticulum profiles, Golgi apparatus, vesicles, and multivesicular bodies. Many vacuoles contained phenolic compounds dissolved or forming various condensed deposits. The secretion components were transported through symplast elements, and the granulocrine and eccrine modes of nectar secretion were observed. The secretion was accumulated in the subcuticular space at the trichome apex and released through a pore in the cuticle. Histochemical and fluorescence assays showed that the trichomes and secretion contained lipophilic and polyphenol compounds, polysaccharides, proteins, and alkaloids. We suggest that these metabolites may serve an important function in protection of plants against biotic stress conditions and may also be a source of phytopharmaceuticals in the future.

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Morphoanatomy and phylogenetics reveals a distinct species of Oxalis sect. Polymorphae (Oxalidaceae) from the Brazilian Atlantic forest

et al. 2022

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Leaf anatomical features of the Eriosema campestre Benth. (Leguminosae, Papilionoideae, Phaseoleae) complex and potential taxonomic implications

Cited by 12 publications

References 25 publications

Taxonomic implications of the leaf anatomy of twelve species of Senna ser. Bacillares (Leguminosae) from northeastern Brazil

Taxonomic implications of the leaf anatomy of twelve species of Senna ser. Bacillares (Leguminosae) from northeastern Brazil

Glandular trichomes of Robinia viscosa Vent. var. hartwigii (Koehne) Ashe (Faboideae, Fabaceae)—morphology, histochemistry and ultrastructure

Morphoanatomy and phylogenetics reveals a distinct species of Oxalis sect. Polymorphae (Oxalidaceae) from the Brazilian Atlantic forest

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