1) In two-branched plants flower initiation of the receptor bud on one branch induced by dark treatment given to the donor leaf on the other branch was compared with that of the axillary bud of the donor leaf. 2) The response was markedly reduced, when the donor and the receptor were separated by a stretch of stem, indicating that the stimulus was dissipated in the stem during transmission.
As a result of some experiments on eggs of Fucus evanescens, the following was revealed. (1) Vital staining with various dyes and cytolytic pattern with nicotine sulphate appear uniformly over all the egg surface in the beginning of the development But as soon as the morphological polarity is determined, these begin to appear partlally in the basal pole, then spread towards the apex. (2) When the egg is immersed in distilled water, it swells and finally ruptures, The rupture occurs at one point before cleavage and in each cell at two-cell stage before the morphological polarity determination, while merely in the basal cell after the determination. (3) The facts above indicate the presence of a permeability gradient along the morphological polarity axis, highest in the basal, i.e. the rhizoid pole.
1. 2, 4-Dinitrophenol, das der unkuppeinde Stoff der oxidativen Phosphorylation ist, beeinflusst die Harnstoffpermeabilitat der Innenepidermiszellen der etiolierten Avena-Koleoptile. 2. 3mg/l DNP erhoht anfangs die Permeabilitat and dann erniedrigt sie mit den Wirkungszeiten. 10mg/l DNP hemmt sie von Anfang an ganzlich. Jedoch erniedrigen beide die Viskositat oder Adhasion des Protoplasmas. 3. DNP halt die Wirkung von IES an, welche die Harnstoffpermeabilitat sowie Viskositat oder Adhasion erhoht.
At eight among fifty stations of Atakawa, Katase, Yatsu, Mine, Yugano, Konabe and Yugashima spas in the Izu Peninsula of Shizuoka Pref., the writer found abundant diatoms. They amount to seventy-three taxons, and those data are as follows: New additional species to Japan: Amphora strigosa, Ceratoneis arcus var. vaucheriae f. kamtchatica, Cocconeis placentula var. Rouxii, Navicula cryptocephaloides, Navicula decussis, Navicula graciloides, Navicula incognita, Navicula menisculus var. sinica, Neidium iridis f. vernalis and Surirella elegans f. constricta. New additional species to Japanese thermal flora: Achnanthes brevipes, Achnanthescrenulata, Ceratoneis arcus var. vaucheriae, Cymbella sumatorensis, Gomphonemaconstrictum var. capitata, Gomphonema longipes var. subclavata, Gomphonemaparvulum var. micropus, Gomphonema tetrastigmata, Navicula oppugnata, Neidiumdubium, Pinnularia borealis, Pinnularia Karelia, Stephanodiscus astraea, Surirellabiseriata, var. bifrons, Surirella robusta and Surirella robusta var. splendida f. punctata.
Determination of the polarity of Psilocybe coprophila Fr. was made, using two strains, K and T, collected in Japan. This fungus has been suggested to include both the bi- and tetrapolar strains. Judging only from the results of test for clamp connections, but ignoring the difference in the number of them, in all possible pairings of monosporous mycelia isolated from a f ruitbody, this fungus may be said to be bipolar. The clamp-bearing mycelia can, however, be subdivided into two groups. The one is characterized by many clamp connections, producing normal fruitbodies, and the other by only a few clamp connections, producing haploid fruitbodies bearing spores of the same mating type. The latter group can hardly be regarded as real diploid mycelia, because of the appearance of haploid fruitbodies which often develop on the monosporous mycelia of this fungus. From this point of view, the polarity of this fungus is thought to be tetrapolar. In the pairings of monosporous mycelia, when both A- and B-factors are different, the number of clamp connections is many, but when A-factors, but not B- factors, are different, it is few, and when B-factors, but not A-factors, are different, or when both A- and B-factors are identical, no clamp connection is formed. It was found that one common factor, B1, was involved in the two strains which were collected from .two places about 500km apart from each other. The regular formation of clamp connections, though it is few in number, in the illegitimate combinations in which B-factors, but not A-factors, are identical, and also the existence of one common factor, B1, in the remote places seem to suggest the evolutional course from bipolarity to tetrapolarity in this fungus.