Embryology of Swainsona Formosa (Fabaceae): Anther and Ovule Development  

Oleh:

Zulkarnain

Jenis: Article from Journal - ilmiah nasional - terakreditasi DIKTI
Dalam koleksi: Hayati Journal of Biosciences vol. 12 no. 1 (Mar. 2005), page 11-16.
Topik: EMBRYOLOGY - ATLASES; Embryology; Development
Fulltext: 32.pdf (416.7KB)

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: HH13.7 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Our study showed that floral morphology and anatomy in swainsona formosa were typical of leguminous flower. The anthers were found to be tetrasporangiate, with a 3 - layered wall below the epidermis. The wall was comprised of a layer of endothecium, middle layer and secretory tapetum. Pollen grains were triporate and shed at a two cell stage. The ovules were campylotropous with a zigzag micropyle. Multiple embryo sacs were occassionally found but only one mature embryo was formed in the seed. Rubbing the receptive stigma with fingertip enhanced pollination, resulted in 100% pod formation on treated flowers. During fertilization, the pollen tube entered the embryo sac via one of two existing synergids, destroying the synergid in the process. The endosperm was a nuclear type and only one or two layers of endosperm left as the seed research its maturity. Th seed coat was composed of a single layer of thick-walled palisade cells on the outside followed by a single layer hypodermal sclereids on the inside.

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