In the present paper, five species and one variety of sedges, grass and pipewort were newly proposed and one sedge was reduced to a varietal rank. A special mention is necessary for a new sedge of Garciles from Java. So far as Thunberg's type, Carex brunnea is characterised by somewhat yellowish-green leaves and very small perigynia 2.5-2.7mm long, hence Dr. Kükenthal once considered true C.brunnea to be a variety of C. genlilis. Although the species of Graciles have very wide deviation, the above plant from Java is not C. brunnea. Further, Malaysian plants treated so may possibly be quite different from C. brunnea. The abbreviations TI and TNS are used for the herbaria of the University of Tokyo and of the National Science Museum, Tokyo, respectively.
Activity of catalase and peroxidase in the seedling of radish plants (Raphanus sativus L. var. raphanistroides Makino, race “Minowase”) during low temperature treatment was measured. It was found that the activities of the catalase and the peroxidase in the seedling under the low temperature treatment are always higher than those in the untreated seedling. But the catalase activity falls gradually with the progress of time in both the seedling subjected to the low temperature treatment and the unsubjected. On the other hand, the peroxidase activity rises sharply on the day when the effect of vernalization begins to appear. It may be assumed that the rise in peroxidase activity on the day, when the low temperature treatment takes place, has some relation to the vernalization. Fig. 3 The change of peroxidase activity during the course of vernalization
The present studies are undertaken to obtain an ecological information concerning the effect of transparency upon the matter production in phytoplankton community of lake and it is demonstrated both experimentally and theoretically that the transparency can be used as an indicator of the productivity of lake. 1) Under the normal condition, the relation between the amount of phytoplankton and the transparency is expressed quantitatively by a simple equation(3). 2) The light penetrating in any depth is estimated approximately from the transparency by Beer's equation and the depth of trophogenous layer is about 2.0 times as large as that of transparency. 3) The effect of turbidity upon the matter production of phytoplankton is assessed by mathematical analysis in which the rate of production is combined with a daily assimilation curve of phytoplankton and daily march of the intensity of illumination in waters. The good agreements are found between the calculated and observed values. 4) The effect of turbidity upon the production of matter in phytoplankton community is more remarkable within the limits of the high turbidity than in the case of the low turbidity. 5) From the above considerations, it becomes clear that the amount of the production of matter in phytoplankton community can be estimated indirectly from the transparency. The author wishes to express his thanks to Prof. M. Monsi and Prof. K. Hogetsu, under whose guidance this research has been carried out. The author also wishes to acknowledge with thanks the encouragement and advice of Prof. T. Miwa.
1. In the present report, a result of cytogenetical study on a plant derived from TdicSa F1 (Triticum dicoccum var. atratum×Secale africanum F1) after the pollination with Haynaldia villosa is described. 2. The external characters of this plant, resemble these of TdicSa F1 in every point though somewhat inferior as shown in Table 1 and Fig. 1. 3. The number of somatic chromosomes of the plant is distinctly found to be 20 (Fig. 2). 4. The number of bivalents in one PMC at heterotypic metaphase varies from 0 to 3, and the frequency of it is tabulated in Table 2, OII being the mode. The results are the same as in the parent TdicSa F1. 5. Considering from the external characters and the meiosis of PMC's, this plant (having 2n=20 chromosomes) may be considered as having developed by parthenegenesis, influenced by the pollen of Haynaldia villosa, from an egg having 20 chromosomes.
1.Karyotype analysis was carried out on nine species and one variety. The results obtained are as follows: Anemone pseudo-altaica A. Raddeana var. integra} K(2n)=32=16Am+4Bsm+4Cst+4Dst1+4tDst2 Cimicifuga acerina var. macrophylla C. acerina var. peltata}K(2n)=16=8Am1+2tAm2+2Bsm+2Cst+2tDst C.japonicaK(2n)=16=10Am+2Bsm+2Cst+2tDst Clematis alpina var. ochotensis C. lasiandra C. ovatifolia} K(2n)=16=10Am+2Bst2Cst1+2tCst2 C. ligusticifoliusK(2n)=16=10Am+2Bst+4tCst C. stansK(2n)=16=10Am+2Bst+Cst1+tCst2+2tCst3 2. When a satellite is left out of consideration, the basic chromosome set of Cimicifuga differs from that of Clematis in having one chromosome with a submedian constriction instead of one chromosome with a short arm remarkably smaller than chromosome-breadth, and the difference in the basic set between Clematis and Anemone (with b=8) lies in the fact that the former has one chromosome with a median constriction in place of one chromosome with a submedian constriction in the latter (cf. Fig. 4).
In the present investigation, the distribution and habit of calcium oxalate crystals in Dioscorea japonica Thunb. and Begonia Evansiana Andr. were observed. (1) Distribution of the crystals in Dioscorea which was grown in the field or grew wild on an ordinary soil was examined. They appear at first near the nerve and in the epidermis and then in the mesophyll. Their number in the circle of 650μ diameter increases and decreases after attaining its maximum. In case of ample supply of nutriment, the number is smaller. (2) Effects of absence of particular elements, K, S, N, Mg are observed, in case of Dioscorea, effect of absence of K is not remarkable, while in case of Begonia it is very remarkable. In those cases, distribution of crystals was compared. Also, Dioscorea which grew wild under very bad condition was examined. It may be able to say that deficiency of nutriment increases the production of crystals. (3) In case of Begonia the variation of nutriment may be related to the crystal habit and as indicated in the previous paper, action of NH4+ in forming raphide was observed.