Development of stomata in leaves of three species of Cycas and Ginkgo biloba L.

Pant, D. D.; Mehra, Bharati

doi:10.1111/j.1095-8339.1964.tb00917.x

Cited by 31 publications

(20 citation statements)

References 5 publications

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“…Another ANDREW P. VOVIDES AND SONIA GALICIA difference is that stomatal plugs, as reported for Podocarpaceae by Stockey et al (1992), were rarely seen in Dioon but present occasionally. The strongly overarching papillate subsidiary cells reported for Cycas revoluta by Pant and Mehra (1964) are unlike the structures in Dioon though their ontogeny may be similar; figure 1G in Pant and Mehra (1964) shows an overarching papilla of a subsidiary cell in a young stoma, and another subsidiary cell dividing to give rise to one encircling cell, and their figure 3F an adult stoma overarched by thickened papillae of subsidiary cells. In Dioon it is the outermost of the three layers of encircling cells with thickened periclinal wall and cuticle that forms the Florin ring-like ring structure.…”

Section: G-fibers and Florin Ring-like Structures In Dioon (Zamiaceae)mentioning

confidence: 85%

G-fibers and Florin ring-like structures in Dioon (Zamiaceae)

Vovides¹,

Galicia²

2016

Bot. Sci.

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Cuticle information and epidermal characters have great potential in systematic studies. However, micromorphology and anatomical studies on cycads are relatively scarce in comparison to similar studies on other gymnosperms. In this study leaflet anatomy and cuticles in the genus Dioon have been investigated with bright field microscopy, epifluorescence, and scanning electron microscopy. Structures hitherto not completely studied for the genus are reported such as lignified hypodermis, girder sclerenchyma, especially G-fibers, and Florin ring-like structures associated with the stomatal apparatus. Key words: anatomy, cuticles, cycads, Cycadales, leaflets. Fibras-G y estructuras de anillo tipo Florin en Dioon (Zamiaceae) ResumenLa información de cutículas y caracteres epidérmicas tienen gran potencial para estudios sistemáticos. Sin embargo, la micromorfología y estudios anatómicos en las cícadas son relativamente escasos en comparación de estudios similares con otras gimnospermas. En este estudio se investigó la anatomía de foliolos y cutículas del género Dioon con técnicas de microscopia de campo claro, epifluorescencia y de microscopía electrónica de barrido y se reportan estructuras no completamente estudiadas antes para el género. Se observó hipodermis lignificada, presencia de esclerénquima de trabe y particularmente fibras gelatinosas y estructuras semejantes a anillos de Florin asociados con los aparatos estomáticos.

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Section: G-fibers and Florin Ring-like Structures In Dioon (Zamiaceae)mentioning

confidence: 85%

G-fibers and Florin ring-like structures in Dioon (Zamiaceae)

Vovides¹,

Galicia²

2016

Bot. Sci.

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“…Carpenter () reported the importance dedicated to the study of the stomata based on the anatomical architecture, quantity, shape and the organization of epidermis cells associated with guardians cells, because it provides subsidies to the taxonomy of plants (Stace, ). Stomata are composed of a pore, the ostiole and a pair of guardians’ cell and they are surrounded by subsidiary cells that differ from the others in size, shape, and orientation (Esau, ; Pant and Mehra, ). The position of the subsidiary cells is an important factor to classify the type of stomata on the leaf epidermis (Carpenter, ).…”

Section: Discussionmentioning

confidence: 99%

Studies on the ultrastructure in Anacardium occidentale L. leaves from Amazon in northern Brazil by scanning microscopy

2015

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Leaves surfaces have various structures with specific functions and contribute to the relationship with the environment. On morphological studies are analyzed various parameters, ranging from macro scale through the micro scale to the nanometer scale, which contribute to the study of taxonomy, pharmacognosy, and ecology, among others. Functional structures found in leaves are responsible for the wide variety of surfaces and some behaviors are given in terms of cellular adaptation and the presence or absence of wax. This study reports the characterization of Anacardium occidentale L. leaf surface and the techniques used therein. A set of scanning electron microscope (SEM) and atomic force microscope (AFM) images performed on fresh leaf allowed observation of textured and heterogeneous profiles on both sides. SCANNING 38:329-335, 2016. © 2015 Wiley Periodicals, Inc.

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“…Possessing an encircling ring (rosette) of four or more subsidiary cells; subsidiary cells often weakly differentiated from other epidermal cells (indistinct from anomocytic types), or sometimes radially elongated (actinocytic); subsidiary cells sometimes in two rings (stephanocytic-bicyclic) Syndetocheilic ('complex-lipped') Term applied to fossil stomata, indicating that the guard cells are derived from a protodermal cell that divided asymmetrically (at least once) to form a GMC and a SLGC, so that at least one of the neighbour cells is a mesogene cell Terms used for stomatal development (Pant & Mehra, 1964a;Pant, 1965;Fryns-Claessens & Van Cotthem, 1973;Payne, 1979) Mesogenous ( Fig. 2d) Refers to a stomatal complex in which all the neighbouring cells are formed from the same meristemoid as the GMC, following one or more asymmetric divisions Mesoperigenous b,c,3c,d) Refers to a stomatal complex with both mesogenous and perigenous neighbouring cells Perigenous (Figs 2a[b,c],3a,b) Refers to a stomatal complex in which the GMC and all the neighbouring cells are formed from different protodermal cells; sometimes asymmetric divisions occur in neighbouring cells, but not in the cell that gives rise to the GMC Leaf growth, epidermal pre-patterning and cell divisions in stomatal lineage Amplifying division Asymmetric division of a meristemoid that creates two daughter cells: an SLGC and a meristemoid or GMC (Lau & Bergmann, 2012)…”

Section: Subsidiary Cellmentioning

confidence: 99%

“…Stomata were reported as haplocheilic by Florin () and Crane (); scored as anomocytic (haplocheilic) by Doyle (), and stephanocytic by Carpenter (). Perginous development was reported for Cycas by Pant & Mehra (), but more developmental studies are needed…”

Section: Introductionmentioning

confidence: 99%

“…Stomata were scored as anomocytic (haplocheilic) by Doyle (), and stephanocytic by Carpenter (). Asymmetric divisions were not recorded by Pant & Mehra (); however, Kausik () reported mesoperigenous stomata, and Rudall et al . () found both perigenous and mesoperigenous stomata in the same leaf (with asymmetric divisions; degree of asymmetry variable); also asymmetric lateral divisions and amplifying divisions…”

Section: Introductionmentioning

confidence: 99%

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Several developmental and morphogenetic factors govern the evolution of stomatal patterning in land plants

2013

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598I.599II.601III.601IV.604V.606VI.607VII.608VIII.610611References611 Summary We evaluate stomatal development in terms of its primary morphogenetic factors and place it in a phylogenetic context, including clarification of the contrasting specialist terms that are used by different sets of researchers. The genetic and structural bases for stomatal development are well conserved and increasingly well understood in extant taxa, but many phylogenetically crucial plant lineages are known only from fossils, in which it is problematic to infer development. For example, specialized lateral subsidiary cells that occur adjacent to the guard cells in some taxa can be derived either from the same cell lineage as the guard cells or from an adjacent cell file. A potentially key factor in land‐plant evolution is the presence (mesogenous type) or absence (perigenous type) of at least one asymmetric division in the cell lineage leading to the guard‐mother cell. However, the question whether perigenous or mesogenous development is ancestral in land plants cannot yet be answered definitively based on existing data. Establishment of ‘fossil fingerprints’ as developmental markers is critical for understanding the evolution of stomatal patterning. Long cell–short cell alternation in the developing leaf epidermis indicates that the stomata are derived from an asymmetric mitosis. Other potential developmental markers include nonrandom stomatal orientation and a range of variation in relative sizes of epidermal cells. Records of occasional giant stomata in fossil bennettites could indicate development of a similar type to early‐divergent angiosperms.

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Development of stomata in leaves of three species of Cycas and Ginkgo biloba L.

Cited by 31 publications

References 5 publications

G-fibers and Florin ring-like structures in Dioon (Zamiaceae)

G-fibers and Florin ring-like structures in Dioon (Zamiaceae)

Studies on the ultrastructure in Anacardium occidentale L. leaves from Amazon in northern Brazil by scanning microscopy

Several developmental and morphogenetic factors govern the evolution of stomatal patterning in land plants

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