Gymnanthe concinna Mitt. is placed in the new subgenus Lethocoleopsis Gro. of Acrobolbus: A. concinnus (Mitt.) c. n. Tylimanthus limbatus Steph. is transferred to Marsupidium: M. limbatum (Steph.) c. n. Notes on synonymy of the Lethocolea species: L. radicosa (L. et L) c. n., L. glossophylla (Spruce) c. n., L. javanica (Schiffn.) c. n. Jungermannia hodgsoniae nom. nov. for Lethocolea grandifolia Berggr.
Experiments were made to investigate the roles of cellular polyphosphates in the cadmium resistance of yeast cells. 1. Recovery of cadmium resistance of phosphorus-starved cells by replenishment correlates with accumulation in cells of both acid-soluble and acid-insoluble poly- phosphates. 2. Since most part of polyphosphate in cells containing cadmium is in a water- soluble form, and since cadmium-polyphosphate forms a water-insoluble complex, polyphosphate does not seem to be the main cadmium binder in the cells. 3. Contents of polyphosphates insoluble in water and trichloroacetic acid were higher in the resistant cells than in the sensitive cells, even when they were cultured without cadmium.
The purple anthocyanin appearing in F1 plants from the cross between red and white varieties of radish (Raphanus sativus) was separated into five component anthocyanins by the use of column chromatography, thin-layer chromatography and paper electrophoresis. These anthocyanins have cyanidin triglucoside (=rubrobrassicin) in common, which is complicated by the acylation of cinnamic acid derivatives. The structures of these anthocyanins were analyzed chromatographically by the application of oxidative degradation with hydrogen peroxide and subsequent hydrolysis with acid or alkali. In all, the purple pigment is a mixture of five acylated derivatives of 3-sophorosyl-5-monoglucoside of cyanidin; namely, rubrobrassicin A, B-1, B-2, C-1, and C-2, whose structures were determined as shown in the text (p. 91). Therefore, the pigment of the purple radish shows a good correspondence to the pigment of the red variety with respect to the patterns of glycosidation and acylation, except for the only difference in hydroxylation pattern of respective anthocyanidins.
1. A study is made of the development of the vascular supply for the floral parts of four genera of the Guttiferae-Moronoboideae, Moronobea, Montrouziera, Symphonia, and Thysanostemon. Special reference is made to the androecium; all of these genera have characteristic fasciculate androecia. 2. It was found that in all plants examined siphonosteles are formed at the level from which the petal-stamen fascicle trace or stamen fascicle trace diverges. These steles arise directly from the receptacular stele, either independently or fused with the vascular supply to the petals. The five dissected siphonosteles formed branch off to form a vascular supply for each stamen after separation of the petal supply. The arrangement of the vascular supply for each stamen differs from genus to genus. In Montrouziera and Thysanostemon U-shaped bundles are formed, with the xylem entirely centrifugal. However, in Moronobea the bundles formed at the same level are distributed quite irregularly. In the genus Symphonia, two rows of irregularly placed bundles supplying each stamen were seen. 3. The siphonosteles seen at the level where fascicle traces formed, and the amphicribral bundles seen in the stamen supply of Moronobea are among the most unusual types of vascular system found in angiosperm androecia. 4. There is a close phylogenetic affinity in the anatomical structure of the four genera studied. Fusion of the fascicles and reduction of the number of stamens per fascicle occurs. The genus Symphonia apparently represents the ultimate stage of this specialization.