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Volume 81, Issue 957
Displaying 1-7 of 7 articles from this issue
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Torao OHTSUKI1968 Volume 81 Issue 957 Pages 119-123
Published: 1968
Released on J-STAGE: October 31, 2006
JOURNAL FREE ACCESSThe author has recently obtained three living samples of Amorphophallus species grown in Java and Madura Island (A. oncophyllus, A. variabilis, and A. campanulatus) and one living sample from India (A. bulbifer). Their subterranean tubers all have an appearance quite similar to that of A. konjac and sections of the tubers show that three of them have characteristic storage tissues including idioblasts (i. e. mannan cells). The storage tissue of one of them (A. campanulatus) has no idioblasts and is composed of thin walled cells filled with starch granules.
Chemical analyses of mannan as well as of other carbohydrates were carried out. The tubers of the first three species contained mannan as the main reserve polysaccharide, while the fourth species (A. campanulatus) had only starch. Three species were found in East Java (including Madura Island), and in Central and West Java. The distribution of the plants in Java and Madura Island is reported.View full abstractDownload PDF (1594K) -
Induced Growth and Nucleic Acid and Protein Metabolism in Plumular Hook Section of Etiolated Pea SeedlingTeruko NAKAMURA, Noriko TAKAHASHI1968 Volume 81 Issue 957 Pages 127-134
Published: 1968
Released on J-STAGE: October 31, 2006
JOURNAL FREE ACCESSThe relationship between GA (gibberellic acid)-induced growth and nucleic acid and protein metabolism was examined using plumular hook sections of etiolated pea seedling.
1. RNA (ribonucleic acid) content per initial fresh weight considerably decreases during the incubation period and the decrease is promoted with the increasing concentrations of GA. DNA (deoxyribonucleic acid) content per initial fresh weight hardly changes during the incubation period and it is increased only slightly with GA treatment. Protein content per initial fresh weight decreases during the incubation period and it is hardly affected by GA.
2. In cortex GA promotes only slightly the increases in the cell number only in the longitudinal direction during the incubation period.
3. Chloramphenicol and mitomycin C are effective inhibitors on the increase in fresh weight of both untreated and GA-treated sections. The protein and nucleic acid content is declined with the same concentrations of the inhibitors as effective on the growth during the incubation period in both cases.
4. The incorporation of the radioactivity from GA into s-RNA (soluble ribonucleic acid) which is concerned with the GA action was not demonstrated during the relatively early period of incubation.
It is concluded that there is some connection between GA-induced growth and nucleic acid and protein metabolism, although the mechanism of GA action in this system remains to be proved.View full abstractDownload PDF (807K) -
Changes in Quinic Acid Content During the Development of Mung Bean PlantTakao MINAMIKAWA, Ikuo OYAMA, Seiichi YOSHIDA1968 Volume 81 Issue 957 Pages 135-140
Published: 1968
Released on J-STAGE: October 31, 2006
JOURNAL FREE ACCESSA study was made of changes in the quinic acid content in the organs of developing mung bean seedlings.
As a preliminary experiment, the organic acid fraction was prepared from extracts of the seedlings, and subjected to paper chromatographic survey. A single spot corresponding to quinic acid was detected by spray with the periodate-thiobar-bituric acid reagent. A spot corresponding to shikimic acid was not detectable.
The content of quinic acid was found to increase in the early stage of growth in both the light- and dark-germinated seedlings. The increase in the content was mostly observed in parts, plumule, epicotyl, hypocotyl and radicle of the seedlings. The content reached the peak at the 4th-5th days after sowing, and then it seemed to decrease both in the cotyledons and other parts.
An experiment extended over a growing period of 16 days in the light indicated that the amount of quinic acid in the seedlings was maintained roughly constant over the experiment period, so that the concentration of the acid per fresh weight decreased depending on growth of the plants.View full abstractDownload PDF (583K) -
Masao HASEGAWA, Michi SHIROYA1968 Volume 81 Issue 957 Pages 141-144
Published: 1968
Released on J-STAGE: October 31, 2006
JOURNAL FREE ACCESSLabelled sucrose was administered to the cambial region of a Prunus yedoensis tree. The distribution of radioactivity and specific activity of flavonoids in the sapwood, inner sapwood and transition zone were measured. In sapwood, the ethyl acetate soluble portion has the highest radioactivity and in the transition zone, the ether soluble portion has the highest radioactivity. Flavonoids in the transition zone have a higher specific activity than those of the inner sapwood.View full abstractDownload PDF (304K) -
Hisao ARANO, Takuzo NAKAMURA1968 Volume 81 Issue 957 Pages 145-157
Published: 1968
Released on J-STAGE: October 31, 2006
JOURNAL FREE ACCESSMorphological studies on the pappus, stoma and pollen were carried out on some species of Tribe Mutisieae. The genus Pertya and Ainsliaea have striking peculiarity in the form of pappus and pollen. There are some differences between Pertya and Ainsliaea in the ratio of stoma numbers and in the number of surrounding cells of stoma. As for the anthocyan of pappus, the genus Pertya have no anthocyan except P. scandens but the genus Ainsliaea has anthocyan in the basal portion of the pappus. The genus Ainsliaea can be divided into two types according to distribution of pigment in the pappus.
Diaspanthus uniflorus (Ainsliaea unifora) has karyological similarities to the species of genus Ainsliaea, and for the stoma and pappus, some morphological similarities were also found between them.View full abstractDownload PDF (2246K) -
Noboru HARA1968 Volume 81 Issue 957 Pages 158-169
Published: 1968
Released on J-STAGE: October 31, 2006
JOURNAL FREE ACCESSDownload PDF (2567K) -
[in Japanese]1968 Volume 81 Issue 957 Pages 175
Published: 1968
Released on J-STAGE: October 31, 2006
JOURNAL FREE ACCESSDownload PDF (112K)
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