植物分类学报

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铃兰族(广义)花粉形态与叶表皮特征的研究

马黎明, 洪德元   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1990-05-10 发布日期:1990-05-10
  • 通讯作者: 马黎明

Pollen Morphology and Epidermal Characters of Leaves in Convallarieae (s. l.)

Ma Li-Ming, Hong De-Yuan   

  • Received:1900-01-01 Revised:1900-01-01 Online:1990-05-10 Published:1990-05-10
  • Contact: Ma Li-Ming

Abstract: The tribe Convallarieae (sensu Krause 1930) consists of 7 genera, i.e. Con- vallaria, Speirantha, Reineckia, Theropogon, Tupistra, Rohdea and Aspidistra, but now gen- erally recognized as two tribes, Convallarieae (the former 4 genera) and Aspidistreae (the rest). Observed in this work were pollen morphology of 17 species and epidermal characters of leaves of 12 species. All the 7 genera are covered in observations. Pollen grains in Convallarieae (s. str.) are all monosulcate and boat-shaped (Plate 1: A- F). The exine is rather uniformly microperforate (Plate 1: A-F); only Theropogon is ex- ceptional in this respect: it has rugulate exine (Plate 1: O, P). Tang and Zhang (1985) have pointed out the heterogeneity of Theropogon in this tribe. Pollen morphology in the tribe Aspidistreae is widely variable. The genera Tupistra and Rohdea were shown to have mono- sulcate and boat-shaped pollen grains. Their exine is perforate or reticulate (Plate 1: G- N). Pollen grains in the genus Aspidistra, however, are nonaperturate and spheroidal. The exine in the genus varies from crass-rugulate, variously gemmate to tuberculate-baculate (Plate 2; A-H). The pollen morphology of Aspidistra is therefore distinctly different from that of Tupistra and Rohdea, which supports the Nakai's (1936) establishment of the tribe Rohdeae for Tupistra and Rohdea. Therefore, Krause's Convallarieae is reasonably divided into at least three tribes, Convallarieae (Speirantha, Convallaria, Reineckia and Theropogon), Aspidistreae (Aspidistra) and Rohdeae (Rohdea and Tupistra). The pollen characters of all the 7 genera are shown in Table 1. The evolutionary trends of pollen morphology (aperture and exine) in the three tribes are discussed and our major view-points are shown in Fig. 1. Observations on epidermal characters of leaves show that in the Convallarieae (s. 1.) sto- matal apparatuses are all anomocytic; cuticular layer on the upper epidermis is mainly striate- thickened or rather uniformly thickened (Plate 2: J--P; Plate 3: A-C, F-N), whereas in the genus Convallaria the cuticular layer is squamosely thickened (Plate 2: I; Plate 3: D, E).The epidermal characters of leaves in the 7 genera are summarized in Table 2.

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