Vegetative Anatomy and Morphology of Ipomoea quamoclit (Convolvulaceae)

Lowell, Cadance; Lucansky, Terry W.

doi:10.2307/2996692

Cited by 22 publications

(26 citation statements)

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“…Estas observaciones sólo coinciden con lo observado en I. hederiflora e I. quamoclit en las que se observaron dos lóbulos opuestos (Lowell & Lucansky, 1986;, mientras que en las especies aquí estudiadas fueron dos o más. Esta asimetría en el sistema vascular de los tallos estaría asociada con el soporte sobre el que se apoyan para crecer (Lowell & Lucansky, 1990;Carlquist, 2007;Angyalossy et al, 2011). El patrón de cámbium supernumerario aparece en estadios avanzados del desarrollo del leño.…”

Section: Discussionunclassified

“…Además se ha reportado el desarrollo de cámbiumes con orientación invertida, que originan xilema centrífugamente y floema centrípetamente (Rajput et al, 2008;Terrazas et al, 2011). La aparición de cámbiumes internos entre el xilema primario y el floema interno, y que producen haces vascular invertidos (Lowell & Lucansky, 1990;Rajput et al, 2008;Patil et al, 2009). Finalmente, el desarrollo de cámbiumes en los radios xilemáticos con capacidad de formar xilema y floema secundarios fue reportado solo en I. obscura (L.) Ker Gawl.…”

Section: Discussionunclassified

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Variante cambial en tallos de Ipomoea (Convolvulaceae) nativas de Argentina.

Delbón

Sánchez²,

Cosa³

2016

Bol. Soc. Argent. Bot.

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Ipomoea es un género diversificado y complejo, compuesto por herbáceas, lianas y enredaderas leñosas, y un pequeño grupo de arbustos y árboles. Llama la atención que todas las especies estudiadas anteriormente presentaron diferentes tipos de variante cambial en sus tallos, independientemente del modo de vida, excepto dos taxones con crecimiento secundario normal, una liana y un árbol. Por ello, en el presente trabajo se planteó el estudio de tres enredaderas nativas de Argentina, Ipomoea cairica, I. purpurea e I. rubriflora, y de I. carnea ssp. fistulosa, árbol con crecimientonormal, con el fin de comparar el desarrollo de sus tallos y aportar datos de interés para dilucidar sus relaciones filogenéticas. Las cuatro especies estudiadas presentaron igual ontogenia y anatomía desus tallos con crecimiento primario, lo que apoyaría sus estrechas relaciones filogenéticas. Por otro lado, las enredaderas presentaron sólo dos tipos de variante cambial, el patrón lobado y el de cámbiumsupernumerario. Se puede inferir que en Ipomoea el tipo de crecimiento secundario, así como los tipos de variante cambial, no estarían directamente relacionados con el hábito; sin embargo, otras características del leño pueden ponerse a consideración como la proporción de tejido parenquimático y características de los vasos.

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Section: Discussionunclassified

Variante cambial en tallos de Ipomoea (Convolvulaceae) nativas de Argentina.

Delbón

Sánchez²,

Cosa³

2016

Bol. Soc. Argent. Bot.

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“…Moreover, the cells from which the first successive cambium initiates are located inside the pericycle, and it does not form from cortical cells. The pericyclic origin of successive cambia has been reported in other species of Ipomoea (Pant & Bhatnagar 1975;Lowell & Lucansky 1986, 1990Patil et al 2009;Rajput et al 2008Rajput et al , 2014Terrazas et al 2011).…”

Section: Discussionmentioning

confidence: 68%

“…The formation of successive cambia in Ipomoea turbinata does not fit any of the classifications proposed so far, because every alternate cambium produces xylem centrifugally and phloem centripetally. The occurrence of successive cambia along with other variant types has long been reported in different species of the Convolvulaceae (Hallier 1893 ;Pfeiffer 1926;Pant & Bhatnagar 1975;Lowell & Lucansky 1990;Carlquist & Hanson 1991;Rajput et al 2008Rajput et al , 2013Patil et al 2009;Terrazas et al 2011), but for Ipomoea turbinata there is virtually no published information detailing the pattern of secondary growth and stem thickening.…”

Section: Discussionmentioning

confidence: 99%

“…The Convolvulaceae are one family in which the first ring of cambium remains actively functional for a definite period. Then it produces a new ring of cambium from the pericycle (Lowell & Lucansky 1990;Rajput et al 2008Rajput et al , 2014Patil et al 2009;Terrazas et al 2011). The newly initiated cambium produces secondary xylem centripetally and phloem centrifugally.…”

Section: Discussionmentioning

confidence: 99%

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Development of Inverse Cambia and Structure of Secondary Xylem in Ipomoea turbinata (Convolvulaceae)

Rajput

2017

Polish Botanical Journal

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Abstract. Structural transformation of mechanical tissues during the shift from a freestanding to a climbing habit is a characteristic of lianas, which are increasingly abundant in tropical forests. The modification of mechanical tissue and the evolution of a new growth pattern serve to increase stem flexibility and conductive efficiency. In Ipomoea turbinata Lag. (Convolvulaceae), the stem thickens via the formation of two distinct types of successive cambia: functionally normal successive cambia (producing xylem centripetally and phloem centrifugally), and inverse cambia (producing xylem centrifugally and phloem centripetally). The former originates from pericyclic derivatives (parenchyma cells located outside the primary phloem), while the latter originates from the conjunctive parenchyma located on the inner margin of the secondary xylem formed from vascular cambium. The secondary xylem produced by normal cambia is significantly more abundant than the xylem formed by inverse cambia. During primary growth, intraxylary primary phloem differentiates concomitantly with the protoxylem at the periphery of the pith; additional intraxylary secondary phloem is added from adjacent parenchyma cells as the plant ages. During initiation of every successive cambium, middle cells in the meristem give rise to cambium, and cells on either side of it serve as sites for initiation of future cambia. The functional role of inverse cambia remains unknown and awaits further experimental studies.

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Anatomical features of ecological importance and taxonomic value revealed by scanning electron microscopy and light microscopy in Camonea umbellata (L.) A.R. Simões & Staples (Convolvulaceae)

dos Santos,

Leite,

de Arruda

2024

Microscopy Res & Technique

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This article describes detailed and novel data on the anatomy and histochemistry of leaves, stems, and roots of Camonea umbellata (L.) A.R.Simões & Staples in different environments for the identification of characters with taxonomical value and of ecological importance, with provision of light and scanning electron microscopy images. To analyze the characters, we collected samples of the vegetative organs of three individuals in each of three populations, which were in a grazing area, an urban environment, and a biological reserve. The main diagnostic anatomical markers for the identification of C. umbellata include amphistomatic leaves, tetracytic and brachyparatetracytic stomata, peltate trichomes, long simple trichomes, epidermis with striated cuticle ornamentation, mesophyll with acute borders, presence of druses, secretory channels, angular collenchyma, fibrous pericycle in the stem, intraxylary phloem in the vegetative organs, oil bodies throughout the midrib, petiole, stem and root, and epicuticular waxes of the crust and coiled rodlet types. Since the characters above did not show variation in the environments evaluated, we consider these characters taxonomically useful for the identification of C. umbellata.Research Highlights The anatomy of the aerial vegetative organs of Camonnea umbellata retains common Convolvulaceae characters. The sinuosity of the epidermal cell walls and the density of trichomes in the epidermis of the petiole were visually variable characters among the analyzed individuals. Amphistomatic leaves, tetracytic and brachyparatetracytic stomata, peltate trichomes, epidermis with striated cuticle ornamentation, dorsiventral mesophyll with border acute, presence of druses, secretory structures, angular collenchyma, fibrous pericycle in the stem, intraxillary phloem, presence of oil bodies in all organs, and epicuticular waxes of the crust type and coiled rods were considered important anatomical markers for the recognition and correct identification of Camonea umbellata.

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Vegetative Anatomy and Morphology of Ipomoea quamoclit (Convolvulaceae)

Cited by 22 publications

References 0 publications

Variante cambial en tallos de Ipomoea (Convolvulaceae) nativas de Argentina.

Variante cambial en tallos de Ipomoea (Convolvulaceae) nativas de Argentina.

Development of Inverse Cambia and Structure of Secondary Xylem in Ipomoea turbinata (Convolvulaceae)

Anatomical features of ecological importance and taxonomic value revealed by scanning electron microscopy and light microscopy in Camonea umbellata (L.) A.R. Simões & Staples (Convolvulaceae)

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