Pollen ultrastructure in anther cultures of Datura innoxia. III. Incomplete microspore division
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چکیده
منابع مشابه
Pollen ultrastructure in anther cultures of Datura innoxia. I. Division of the presumptive vegetative cell.
Ultrastructural features of embryogenic pollen in Datura innoxia are described, just prior to, during, and after completion of the first division of the presumptive vegetative cell. In anther cultures initiated towards the end of the microspore phase and incubated at 28 degrees C in darkness, the spores divide within 24 h and show features consistent with those of dividing spores in vivo. Cytok...
متن کاملPollen ultrastructure in anther cultures of Datura innoxia. II. The generative-cell wall.
In young pollen grains of Datura innoxia, a wall of the usual hemispherical type separates the 2 gametophytic cells initially and, in the electron microscope, appears as an electron-translucent matrix which is contiguous with the intine. Before detachment of the generative cell from the intine, the matrix decreases in thickness and in places is dispersed altogether leaving the plasmalemmae on e...
متن کاملTropane alkaloids of Datura innoxia from Morocco.
Fifty three alkaloids were identified in the organs (roots, stems, leaves, flowers, and seeds) of Datura innoxia by GC/MS. Seventeen of them are reported for the first time for this species and one nor-derivative, 3-phenylacetoxynortropane (28), for the genus Datura. Furthermore, four new tropane esters were tentatively identified as 3-acetoxy-6,7-epoxytropane (acetylscopine) (10), 3-acetoxy-6-...
متن کاملSelection, Isolation, and Characterization of Cadmium-Resistant Datura innoxia Suspension Cultures.
Datura innoxia cells from suspension cultures were selected for their ability to grow and divide rapidly in normally lethal concentrations of cadmium. Cells resistant to 12.5, 25, 50, 100, 160, 200, and 250 micromolar cadmium chloride were isolated and utilized to initiate cell suspension cultures resistant to this toxic metal ion. Variant cell lines retained their ability to grow in cadmium af...
متن کاملInvestigation on primary and secondary metabolism of Datura innoxia Mill. tissue cultures
in journal: 1, László I., Szoke É. and Tyihák E. (1998) Effect of Magnesium on the Methylation of Alkaloids in Datura innoxia Mill. Tissue Cultures. Magnesium Research, 11, 236-237.
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ژورنال
عنوان ژورنال: Journal of Cell Science
سال: 1976
ISSN: 1477-9137,0021-9533
DOI: 10.1242/jcs.22.3.493