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中国天胡荽、变豆菜两亚科花粉形态的观察

佘盂兰, 舒璞   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1992-03-18 发布日期:1992-03-18
  • 通讯作者: 佘盂兰

Pollen Morphology of Hydrocotyloideae and Saniculoideae (Apiaceae) in China

Sheh Meng-Lan, Su Pu   

  • Received:1900-01-01 Revised:1900-01-01 Online:1992-03-18 Published:1992-03-18
  • Contact: Sheh Meng-Lan

摘要:

本文报道了天胡荽亚科和变豆菜亚科的5属30种和2变种的花粉形态。研究表明,这两亚科有
6种花粉类型,两亚科的花粉类型不相同但各自有相对的一致性,说明它们是两个自然类群;花粉形态的证据还说明了马蹄芹属归于天胡妥亚科的正确性等。

关键词: 花粉形态, 伞形科, 天胡荽亚科, 变豆菜亚科

Abstract:

Pollen grains of 30 species and 2 varieties from China, belonging to 5 genera (out
of 36 species in 5 genera) of Hydrocotyloideae and Saniculoideae, were examined with light
microscope and scanning electron microscope. 1.Six types of the pollen shape are recognized
in Hydrocotyloideae and Saniculoideae from China, and their evolutionary trend is from
rhomboidal→subspheroidal→ellipsoidal→subrectangular→superrectangular to equatorial-
ly-constricted. 2.Pollen grains of Hydrocotyloideae are mostly ellipsoidal with P / E ratio
1.07-1.6, the polar axis 22.5-46μm long, the equatorial axis 13.75-27.5μm long, and with
the size index 21.1-31.8.They are angulapeturate in the great majority, and the exine sculp-
ture is recticulate under SEM. Those of Saniculoideae are mostly superrectangular or rectan-
gular, with P/E ratio 1.3-2.1, the polar axis 35-65μm long, the equatorial axis 17.5-
42.5μm long, and with the size index 28.2-49.7. They are planaperturate in the great majori-
ty and the exine sculpture is striate-reticulate or cerebro-reticulate under SEM. Therefore,
the latter might be more advanced than the former. 3.Pollen grains of Dickinsia Franch., en-
demic to China, are ellipsoidal,with P/E ratio 1.5,the polar axis 31.25-37.5μm long, the
equatorial axis 20-25μm, and with the size index 27.81. They are angulaperturate, and the
exine sculpture is cerebroid-reticulate under SEM. The genus is greatly similar to the mem-
bers of Hydrocotyloideae in pollen morphology, which supports the treatment of the genus as
a member of Hydrocotyloideae by Handel-Mazzetti (1933).

Key words: Pollen morphology, Apiaceae, Hydrocotyloideae, Saniculoideae