巻号一覧
83 巻, 983 号
選択された号の論文の4件中1～4を表示しています
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Yoshio YOSHIDA1970 年 83 巻 983 号 p. 137-143
発行日: 1970年
公開日: 2006/10/31
ジャーナル フリーChanges in chlorophyll and free sugar contents of Elodea leaves after detachment, and effects of nicotinamide adenine dinucleotide (NAD) and benzimidazole on the changes were investigated. NAD accelerated the loss of chlorophyll, but benzimidazole counteracted the NAD effect and maintained chlorophyll at a high level. Light was found to be necessary for the NAD acceleration of the senescence. Detachment of leaves caused an increase in the free sugar content, while treatment of the detached leaves with NAD caused a decrease. This effect of NAD was also inhibited by benzimidazole.抄録全体を表示PDF形式でダウンロード (2317K) -
Kazuo HOZUMI, Hiromitsu KIRITA1970 年 83 巻 983 号 p. 144-151
発行日: 1970年
公開日: 2006/10/31
ジャーナル フリーLeaves constituting a forest canopy are well adapted to different levels of light intensity to which they are exposed at different depths within the canopy. The parameters of the photosynthetic rate-light intensity curve determined with detached leaves were found to undergo certain regular changes corresponding to the extinction of light from the surface to the bottom of forest canopy.
The canopy photosynthesis model proposed by Monsi and Saeki was elaborated taking these regularities into consideration, in order to enable a more accurate estimation of the rate of canopy photosynthesis in forests on the basis of reasonable mathematical procedure. Some biological and mathematical properties of the newly proposed model were also discussed.抄録全体を表示PDF形式でダウンロード (649K) -
池森 雅彦1970 年 83 巻 983 号 p. 152-162
発行日: 1970年
公開日: 2006/10/31
ジャーナル フリーFor the elucidation of relationship between photosynthesis and calcium carbonate deposition in marine algae, the rates of calcium-45 uptake and calification were investigated. The rate of calcium-45 uptake increased in the light by two to five times greater than that in the dark. A remarkable calcification gradient from the marginal part to the basal part was observed in the vegetative frond of Padina japonica. In the sporogenous frond, the uptake rate was greatly reduced even in the light especially at the sporogenous part. The amount of calcium taken up by calcareous algae was from ten to a hundred times larger than that by non- calcareous algae, while no significant difference was observed among the rates of their photosynthesis. In all species of calcareous and non-calcareous algae so far used in this work, the inhibitors of carbonic anhydrase caused a marked depression in the uptake rate even in the light, and the inhibitors of photosynthesis also made a cessation of measurable increase. Among four fractions from the algal fronds in which calcium-45 was incorporated, acid-soluble fraction which consists mainly of calcium carbonate showed higher radioactivity, while such fractions as ethanol soluble and alkali soluble ones contained lesser activities. Moreover, it was found that when the experiments were carried out in the light, the radioactivity incorporation into the acid-soluble fraction became greater as compared with that into the other fractions.抄録全体を表示PDF形式でダウンロード (1340K) -
喜瀬 洋子, 辰野 誠次1970 年 83 巻 983 号 p. 163-172
発行日: 1970年
公開日: 2006/10/31
ジャーナル フリー1) 本研究では日本産タチゴケ属(Atrichum)の 2種3変種の細胞学的研究を行なった.
2) 雌雄異株の A. undulatum var. minus (タ チゴケ) と A. yakushimense (ヤクシマタチゴケ) に構造的性染色体が発見された. それは, それぞれ の植物の雌雄の染色体組中最長の異質染色体(H)で, これが体細胞分裂の中期では形および大きさに差が ないが, 前中期でXよりYに heterochromatin の 量が多い.
3) 観察されたタチゴケ属植物の核型は次のごと くである.
Atrichum undulatum
var. minus (タチゴケ)
{♀K(n)=7=V(H, X)+3V+2J+m(h) _♂K(n)=7=V(H, Y)+3V+2J+m(h)
var. undulatum (ナミガタタチゴケ)
K(n)=14=V(H, X)+V(H, Y)+6V+
4J+2m(h)
var. haussknechtii (ヒロハタチゴケ)
♂K(n)=21=2V(H,X)+V(H,Y)+
9V+6J+3m(h)
A. yakushimense (ヤクシマタチゴケ)
{♀K(n)=7=V(H, X)+3V+2J+m(h) ♂K(n)=7=V(H, Y)+3V+2J+m(h)
A. spinulosum (ケイリンタチゴケ)
♀♂K(n)=7=V(H)+3V+2J+m(h)
4) A. undulatum complex (ナミガタタチゴケ群) の3変種の染色体組み合わせと性との関係は, A+Xが雌, A+Yが雄 (var. minus), 2A+X +Y (var. undulatum) と 3A+2X+Y (var. haussknechtii)が雌雄同株で, 性決定は性染色体 XYによるものと考えられる.抄録全体を表示PDF形式でダウンロード (2646K)
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