Surface Ultrastructure of Seeds of Chinese Cuscuta

Huang Jian-zhong, Li Yang-han, Zhang Yu-ying

Received:1900-01-01 Revised:1900-01-01 Online:1993-05-18 Published:1993-05-18
Contact: Huang Jian-zhong

Abstract:

The surface ultrastructure of seeds of chinese Cuscuta was observed under

SEM. The main results are as follows: the seed surface could be divided into

three parts: hilum, hilum-rim and spermoderm. The hilum is collar-shaped or

higher or lower than level of hilum-tim. Hilum-rim cells are mostly radiately ar-

ranged and less frequently in reticulate or other types of arrangement. The

spermoderm shows at least three patterns of ornamentation, cerebelloid, striate

or irregular, on which some tuberculate or small clumps of granules could be

found sometimes According to the surface ultrastructure of the hilum, hilum-rim

and spermoderm, the observed dodder seeds could be divided into three types.

The surface characters of dodder seeds are also important both for diagnosis of

species and for quarantine of dodders.

Key words: Cuscuta seeds, hilum, hilum-rim, spermoderm

Huang Jian-zhong, Li Yang-han, Zhang Yu-ying. Surface Ultrastructure of Seeds of Chinese Cuscuta[J]. .

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