Puccinia Arundinellae-anomalae Diet., P. Polygoni-amphibii Pers., P. Caricis-blepharicarpae Hirats. f., P. Sorghi Schw., P. Hemerocallidis Thüm., P. sessilis Schneid 及び P. agropyricola Hirats f. の7の Puccinia 属菌の異種寄生性を接種試験によつて証明した。同試験において陽性の結果を得たものを表示すれば次の如くである。
Morus Miyabeana の1新種および Morus bombycis KOIDZ. var. Hamadai の1新変種を創定した。また Morus australis POIRET var. glabra KOIDZ. を九州において発見しMorus bombycis KOIDZ. において var. diabolica HOTTA, var. pubescens HOTTA, var. asperata HOTTA, var. subulata HOTTA. var. vestita KOIDZ. の5変種が陸中に産し, f. anormalis HOTTA の1品種が陸前に産することを確認した。
(1) Several strains of yeasts were isolated, from the leaves of the trees mentioned below:-(a) The Pinus densiflora SIEB. et Zucc. in the Toyama Prefecture; May 1947, June 1948 and May 1949. (b) 9 species of the needle leaved trees and 8 species of the broad leaved trees chiefly in the precinct of the Tokyo University; from Oct. to Nov. 1949. (2) 23 strains of yeasts were selected from the 37 strains which were isolated by the author and their morphological and physiological characteristics were investigated. (3) Identified strains are as follows;-Saccharomyces, Hansenula in sporogenous yeasts. Torulopsis, Kloeckera, Rhodotorula in asporogenous yeasts. Though the author did'nt succeed in the spore formation, a strain was acertaine a species of the Pichia from other characteristics. A strain which is closely relatod to Saccharomyces cerevisiae HANSEN seems to appear specifically on the pine leaves, especially during early summer time and has been shown to be useful in the industrial applications. (4) In the frequency of appearance on leaves, asporogenous yeasts, especially the Torulopsideae, surpass sporogenous yeasts. (5) It has been found that the frequency of appearance varies according to seasons. (6) It is not quite sure that every kind of trees has its own yeast, but it seems according to the author's investigation that there are species which have some limited distribution for the definite species of the trees. (7) It has been found that the growth of the yeasts is promoted by the extract of the leaves of some of the above mentioned plants.
1. 22 species and 2-varieties of mosses are studied cytologicaly. The results obtained, the number of chromosomes and the morphology of them are given in Table 1 and Figures 1-39. 2. The same number of chromosomes has been found in the plants belonging to the same genus. 3. In almost every mosses studied have been observed two heterochromosomes; one of which has the largest volume in each chromosomeset, the other the smallest volume. The former may be denoted with Hand the later with h, as that already in the similar sense has been proposed by Tatuuo (1941) in liverworts.