Absence of petals, or being apetalous, is usually one of the most important features that characterizes a group of flowering plants at high taxonomic ranks (i.e., family and above). The apetalous condition, however, appears to be the result of parallel or convergent evolution with unknown genetic causes. Here we show that within the buttercup family (Ranunculaceae), apetalous genera in at least...

The objectives of this study were to examine the foliar sensitivity to ozone exposure of 12 tree, shrub, and herbaceous species native to southern Switzerland and determine the seasonal cumulative ozone exposures required to induce visible foliar injury. The study was conducted from the beginning of May through the end of August during 2000 and 2001 using an open-top chamber research facility l...

BACKGROUND AND AIMS Ranunculaceae presents both ancestral and derived floral traits for eudicots, and as such is of potential interest to understand key steps involved in the evolution of zygomorphy in eudicots. Zygomorphy evolved once in Ranunculaceae, in the speciose and derived tribe Delphinieae. This tribe consists of two genera (Aconitum and Delphinium s.l.) comprising more than one-quarte...

12:00–12:55 Registration 12:55–13:00 Opening remarks, chaired by Makoto Namiki (Toho Univ.) Yasufumi Saruwatari (Univ. of Tsukuba) Komei Fukuda (ETH Zurich) 13:00–14:20 Session 1, chaired by Yasuko Matsui (Tokai Univ.) Finding the boundary nodes of a Euclidean graph Reinhardt Euler (Univ. of Brest) Deza’s last problems Yohji Akama (Tohoku Univ.) 14:35–15:55 Session 2, chaired by Tomomi Matsui (...

Previously, we have shown that boehmenan, a natural product isolated from the dried stem of Caulis clematidis armandii, exhibits various biological activities. The current study investigated the effects of boehmenan on the growth of human epidermoid carcinoma A431 cells. Cell viability and 50% inhibiting concentration (IC50) were assessed by CellTiter-Glo luminescent cell viability assay. Cell ...