Studies on the Pollen Morphology of the Genus Brassica (Cruciferae) in China

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Studies on the Pollen Morphology of the Genus Brassica (Cruciferae) in China

Lan Yong-Zhen, Gheo Tai-Yien, Qian Wei-Zhen

(Jiangsu Institute of Botany. NanJing)

Received:1900-01-01 Revised:1900-01-01 Online:1989-09-10 Published:1989-09-10
Contact: Lan Yong-Zhen

Abstract

Abstract:

The present paper reports the pollen morphology of 36 species and varieties of

Brassica L. in China mostly for the first time. They were examined both under LM and SEM.

Pollen grains of Brassica L. in China are long-spheroidal, subspheroidal, spheriodal, oblate,

rarely reniformis or subsquare. According to the aperture characters pollen grains may be

divided into four types: 2,3,4-colpate, 3-colpate, 3,4-colpate, 3,4-colporate. The exine scul-

pture may also be divided into three types: 1, reticulate, 2, cerebroid-reticulate, 3, foveolate-

reticulate. Detailed characters of pollen grains for each taxon are presented in Table 1. The

2,3,4-colpate type of pollen grains may be considered as primitive one and the 3,4-colpate or

3,4-colporate type of pollen grains is the most advanced in Brassica. The tricolpate aperture

and reticulate exine have been reported by the previous authors, whereas, 3,4-colporate and ce-

rebroid-reticulate or foveolate-reticulate pollen grains are newly reported.

Key words: Pollen morphology, Brassica

Lan Yong-Zhen, Gheo Tai-Yien, Qian Wei-Zhen. Studies on the Pollen Morphology of the Genus Brassica (Cruciferae) in China[J]. .

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Studies on the Pollen Morphology of the Genus Brassica (Cruciferae) in China

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