STUDY ON THE DEVELOPMENTAL STAGES OF OVULE AND POLLEN GRAINS IN TANACETUM PARTHENIUM

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CHEHREGANI ABDOLKARIM; MOHSENZADEH FARIBA; HAJISADEGHIAN SOMAYEH

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Journal: JOURNAL OF DEVELOPMENTAL BIOLOGY Year:2009 | Volume:1 | Issue:3 Page(s): 7-18

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Title

STUDY ON THE DEVELOPMENTAL STAGES OF OVULE AND POLLEN GRAINS IN TANACETUM PARTHENIUM

Author(s)

CHEHREGANI ABDOLKARIM | MOHSENZADEH FARIBA | HAJISADEGHIAN SOMAYEH | Issue Writer Certificate

Keywords

ASTERACEAEQ2

MICROSPOROGENESEQ2

MEGASPOROGENESQ2

OVULEQ2

EMBRYOGENESEQ2

TANACETUM PARTHENIUMQ3

Abstract

Developmental stages of OVULE and pollen grains inTanacetum parthenium were studied in this research. The flowers and buds, in different developmental stages, were removed, fixed in FAA70, stored in 70% ethanol, embedded in paraffin and sectioned at 7-10*m with a microtome. Staining was carried out with PAS and contrasted with Hematoxylin. Results indicated that anthers are tetrasporangiate and anther tapetum is of the secretory type. Pollen tetrads are tetrahedral and tetragonal. Pollen grains are 2-celled with three colpes and needles on the surface, when shed. OVULE is anatropous, unitegmic and tenuinucellate. Endothelium is uniseriate. Endothelium layer is composed of monolayer cells. Embryo sac development is of the monosporic andPolygonum type. The shape of megaspore tetrads is both tetrahedral and tetragonal form. Functional megaspore is the micropyle one.Embryo sac is very small in the beginning of development, so that the nuclei are arranged as linear, but its size is increased in the late of development. Antipodal cells increase up to 6-8 and their nuclei become polyploidy. Results of this research showed the presence of secratorty channel in the ovary wall. Many-celled tricomes were seemed on the outer surface of ovary.

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APA: Copy

CHEHREGANI, ABDOLKARIM, MOHSENZADEH, FARIBA, & HAJISADEGHIAN, SOMAYEH. (2009). STUDY ON THE DEVELOPMENTAL STAGES OF OVULE AND POLLEN GRAINS IN TANACETUM PARTHENIUM. JOURNAL OF DEVELOPMENTAL BIOLOGY, 1(3), 7-18. SID. https://sid.ir/paper/193159/en

Vancouver: Copy

CHEHREGANI ABDOLKARIM, MOHSENZADEH FARIBA, HAJISADEGHIAN SOMAYEH. STUDY ON THE DEVELOPMENTAL STAGES OF OVULE AND POLLEN GRAINS IN TANACETUM PARTHENIUM. JOURNAL OF DEVELOPMENTAL BIOLOGY[Internet]. 2009;1(3):7-18. Available from: https://sid.ir/paper/193159/en

IEEE: Copy

ABDOLKARIM CHEHREGANI, FARIBA MOHSENZADEH, and SOMAYEH HAJISADEGHIAN, “STUDY ON THE DEVELOPMENTAL STAGES OF OVULE AND POLLEN GRAINS IN TANACETUM PARTHENIUM,” JOURNAL OF DEVELOPMENTAL BIOLOGY, vol. 1, no. 3, pp. 7–18, 2009, [Online]. Available: https://sid.ir/paper/193159/en

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