Development of Stomata in Some Cruciferae

Pant, D. D.; Kidwai, Parveen

doi:10.1093/oxfordjournals.aob.a084160

Cited by 53 publications

(36 citation statements)

References 6 publications

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“…A combination of different types of mature stomata and such abnormalities have been described by Pant and Kidwai (1964) in Phylanodiflora, a member of Verbenaceae and in Umbelliferae (Apiaceae) (Shah and Abraham, 1981). The mesogenous ontogeny observed in the isotricytic stomata where the smaller meristemoid cell remains meristematic has also been previously reported (Pant and Banerji, 1965;Pant and Kidwai, 1967;Paliwal, 1967). Noraini and Cutler (2009) highlighted the need to use anatomical evidence together with morphological characteristics in species identification.…”

Section: Discussionsupporting

confidence: 58%

Epidermal Structures and Stomatal Ontogeny in Terminalia catappa L. (Combretaceae)

Ekeke¹,

Agbagwa²

2014

International J. of Botany

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A B S T R A C T Stomatal ontogeny and epidermal characteristics of Terminalia catappa L., an important tropical economic plant, were studied and described. The central portions of cotyledonary and mature leaves were peeled, stained with acetocarmin, 1% safranin and fast green stains as required, mounted on microscope slides and observed under Olympus photomicroscope for stomata ontogeny and developmental stages. The cells of the epidermis of the species are polygonal, isodiametric or elongated in various directions and arranged irregularly. The anticlinal epidermal walls are sinuous, undulating, straight or arched. Combretaceous eglandular trichomes were observed on the abaxial surface of the cotelydonary leaves. Six types of stomata (anomocytic, tetracytic, stuarocytic, anisocytic, isotricytic, diacytic) and different transitional stages were also observed. Stomata occurrence in cotyledonary leaves was observed to be amphistomatic but hypostomatic in mature leaves. The adaxial stomatal index on the cotyledonary leaves ranged from 3.57-14.29 (9.61±3.15) while on the abaxial surface it varied from 12.50-31.25 (23.50±5.13). The ontogeny of isotricytic stomata is mesogenous; it is however mesoperigenous in anomocytic, tetracytic and anisocytic stomata types. Stomata clusters are frequent on the abaxial surface of mature leaves while contiguous stomata and abnormal stomata with unequal guard cells are rare. Stomatal ontogeny, an important taxonomic character, is described for the species.

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Section: Discussionsupporting

confidence: 58%

Epidermal Structures and Stomatal Ontogeny in Terminalia catappa L. (Combretaceae)

Ekeke¹,

Agbagwa²

2014

International J. of Botany

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“…As an alternative, we chose young leaves of B. rapa, since highly conserved homologs of both the AGL16 target and miR824 are expressed in this species (Figures 1B and 1E). Sense miR824 was detected in satellite meristemoids ( Figure 7A), which are easily identifiable by their triangular shape and position close to mature stomata (Pant and Kidwai, 1967), and guard mother cells ( Figure 7B) but not in mature guard cells (Figures 7A and 7B). By contrast, AGL16 mRNA was detected only in mature guard cells and not in cells of stomatal complexes, where miR824 is localized ( Figure 7D).…”

Section: Mir824 and Agl16 Mrna Are Localized In Different Cell Typesmentioning

confidence: 99%

“…Brassicaceae species including Arabidopsis form anisocytic stomatal complexes consisting of a central stoma and guard cells surrounded by three neighboring cells in which one cell (E3) is usually smaller than the other two cells (E1 and E2) (Pant and Kidwai, 1967). Primary stomatal complexes are usually of monoclonal origin (von Groll and Altmann, 2001).…”

Section: Introductionmentioning

confidence: 99%

MicroRNA-Mediated Regulation of Stomatal Development inArabidopsis

et al. 2007

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The proper number and distribution of stomata are essential for the efficient exchange of gases between the atmosphere and the aerial parts of plants. We show that the density and development of stomatal complexes on the epidermis of Arabidopsis thaliana leaves depend, in part, on the microRNA-mediated regulation of Agamous-like16 ( AGL16 ), which is a member of the MADS box protein family. AGL16 mRNA is targeted for sequence-specific degradation by miR824, a recently evolved microRNA conserved in the Brassicaceae and encoded at a single genetic locus. Primary stomatal complexes can give rise to higher-order complexes derived from satellite meristemoids. Expression of a miR824-resistant AGL16 mRNA, but not the wild-type AGL16 mRNA, in transgenic plants increased the incidence of stomata in higher-order complexes. By contrast, reduced expression of AGL16 mRNA in the agl16-1 deficiency mutant and in transgenic lines overexpressing miR824 decreased the incidence of stomata in higher-order complexes. These findings and the nonoverlapping patterns of AGL16 mRNA and miR824 localization led us to propose that the miR824/AGL16 pathway functions in the satellite meristemoid lineage of stomatal development.

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“…The meristemoid undergoes two more asymmetric divisions, finally resulting in the formation of a centrally located guard mother cell (GMC) surrounded by three neighboring cells. The GMC divides symmetrically into the two GCs, which then differentiate to acquire their unique structural and biochemical features (Pant and Kidwai, 1967;Larkin et al, 1997). The relevant cell types that occur during the different stages of stomatal development are shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

The Subtilisin-Like Serine Protease SDD1 Mediates Cell-to-Cell Signaling during Arabidopsis Stomatal Development

2002

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Wild-type stomata are distributed nonrandomly, and their density is controlled by endogenous and exogenous factors. In the Arabidopsis mutant stomatal density and distribution1-1 ( sdd1-1 ), the establishment of the stomatal pattern is disrupted, resulting in stomata clustering and twofold to fourfold increases in stomatal density. The SDD1 gene that encodes a subtilisin-like Ser protease is expressed strongly in stomatal precursor cells (meristemoids and guard mother cells), and the SDD1 promoter is controlled negatively by a feedback mechanism. The encoded protein is exported to the apoplast and probably is associated with the plasma membrane. SDD1 overexpression in the wild type leads to a phenotype opposite to that caused by the sdd1-1 mutation, with a twofold to threefold decrease in stomatal density and the formation of arrested stomata. While SDD1 overexpression was effective in the flp mutant, the tmm mutation acted epistatically. Thus, we propose that SDD1 generates an extracellular signal by meristemoids/guard mother cells and demonstrate that the function of SDD1 is dependent on TMM activity.

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Development of Stomata in Some Cruciferae

Cited by 53 publications

References 6 publications

Epidermal Structures and Stomatal Ontogeny in Terminalia catappa L. (Combretaceae)

Epidermal Structures and Stomatal Ontogeny in Terminalia catappa L. (Combretaceae)

MicroRNA-Mediated Regulation of Stomatal Development inArabidopsis

The Subtilisin-Like Serine Protease SDD1 Mediates Cell-to-Cell Signaling during Arabidopsis Stomatal Development

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