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(American Journal of Botany. 1999;86:302-305.)
© 1999 Botanical Society of America, Inc.

Three groups of species in Petunia sensu Jussieu (Solanaceae) inferred from the intact seed morphology1

Hitoshi Watanabe 2 , Toshio Ando 2, 5, Eisho Nishino 2 , Hisashi Kokubun 2 , Tatsuya Tsukamoto 2 , Goro Hashimoto 3 and Eduardo Marchesi 4

2Faculty of Horticulture, Chiba University, 648 Matsudo, Chiba 271–8510, Japan; 3Centro de Pesquisas de História Natural, 618 Rua Jaime Ribeiro Wright, Itaquera, São Paulo 08260–070, Brazil; and 4Facultad de Agronomia, Universidad de la República, Garzon 780, Montevideo, Uruguay

The intact seed surface morphology in 45 taxa of Petunia sensu Jussieu native to South America (Petunia sensu Wijsman plus Calibrachoa) was compared under scanning electron microscopy. The existence of three groups of species, differentiated in terms of seed morphology, was revealed as follows: (1) all species of Petunia sensu Wijsman, having coarse wavy middle lamellae and anticlinal walls; (2) Calibrachoa parviflora and C. pygmaea, having fine wavy middle lamellae embedded in straight anticlinal walls; and (3) the other species of Calibrachoa, having straight middle lamellae and anticlinal walls. Close relationships between seed morphology and the other characteristics observable in the groups of species are discussed.

Key Words: Calibrachoa • Calibrachoa parviflora; Calibrachoa pygmaea • Petunia • scanning electron microscopy (SEM); seed surface morphology • Solanaceae




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T. ANDO, H. KOKUBUN, H. WATANABE, N. TANAKA, T. YUKAWA, G. HASHIMOTO, E. MARCHESI, E. SUAREZ, and I. L. BASUALDO
Phylogenetic Analysis of Petunia sensu Jussieu (Solanaceae) using Chloroplast DNA RFLP
Ann. Bot., August 1, 2005; 96(2): 289 - 297.
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