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Volume 78, Issue 923
Displaying 1-5 of 5 articles from this issue
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Further Studies on One- and Two-Dimensional Growth in Gametophytes of Pteris vittataYukio KATO1965 Volume 78 Issue 923 Pages 149-155
Published: 1965
Released on J-STAGE: October 31, 2006
JOURNAL FREE ACCESSFor fern gametophytes growing in the filamentous pattern mannitol promotes elongation. Such an effect of mannitol is almost completely nullified in blue light. Soluble starch in the culture medium accelerates the transition from one- to two-dimensional growth. This effect is not seen in red light. Antagonism is found to occur between mannitol and soluble starch.
It is a pleasure to acknowledge the many helpful suggestions and encouragement given to the author by Professor M. Kumazawa, Nagoya University.View full abstractDownload PDF (1351K) -
Tuguo TATEOKA1965 Volume 78 Issue 923 Pages 156-163
Published: 1965
Released on J-STAGE: October 31, 2006
JOURNAL FREE ACCESSAn attempt was made to clarify the morphological features of Oryza eichingeri A. Peter and O. punctata Kotschy ex Steud. A total of 50 samples, collected mainly in East Africa, were studied in the laboratory and also in the field. It was found that O. eichingeri and O. punctata differ significantly in spikelet breadth, ligule features, base of culms, form of panicles, awns, and shape of sterile lemmas. Three collections were found to be intermediate, and a possible origin for these intermediateforms was suggested.
Specimens examined in the East African Herbarium and in the Institut de Recherches Scientifiques à Madagascar:
Oryza punctata Kotschy ex Steud.-Bosser, J. 5412; Drumond, R. B. 7754; Eggeling, W. J. 5452; Eggeling, W. J. and J. E. 5180; Greenway, P. J. 1405; Greenway, P. J. and W. J. 7064; Hunan, M. 96; Polhill, R. and Paulo, S. 484;
Stafles, R. R. 15/11/1934; Thomas, A. S. 3712; Vaughan, T. H. 209; a local collector 22/7/1935.
Oryza eichingeri A. Peter-Doukins, H. C. 656; Eggeling, W. J. and J. E. 4712, 4978, 4984, 5453; Eichinger 7636; Glasgow, J. P. 11/1/1946; Greenway, P. J. 3246, 3260; Greenway, P. J. and Brenan, J. P. M. 8315; Greenway, P. J. and Eggeling, W. J. 7060; Thomas, A. S. 4033; Welch, J. R. 322.
Intermediate-Greenway, P. J. 3228.View full abstractDownload PDF (2496K) -
Beyoung H. KWACK, Timorthy MACDONALD1965 Volume 78 Issue 923 Pages 164-170
Published: 1965
Released on J-STAGE: October 31, 2006
JOURNAL FREE ACCESSA variety of water-soluble inorganic and organic substances at the selected low concentrations exhibit a stimulatory effect on pollen growth in Crinum asiaticum, when Ca is present in the cultural media.
When Ca is not artificially supplied to the media, the planting of a relatively large pollen population can partially substitute for the artificial addition of Ca. This is due to an increased level of Ca brought about by the residual Ca inherent to the large pollen population in the media. Therefore, a stimulatory effect of various substances observed by previous workers may be reduced to an increased amount of Ca that comes from a relatively large pollen population. A mode of interaction between Ca ions and water-soluble substances was discussed.View full abstractDownload PDF (1289K) -
Relations between the Change in Osmotic Value of Expressed Sap and the Conversion of Glycogen to Reducing Sugar in Tissues during Receptaculum ElongationKenjiro KINUGAWA1965 Volume 78 Issue 923 Pages 171-176
Published: 1965
Released on J-STAGE: October 31, 2006
JOURNAL FREE ACCESS1. The receptaculum of Dictyophora indusiata can expand in humid air. When the fragment of stipe normally elongated the osmotic value of its expressed sap remained constant during elongation, 6 to 10atm. When the gelatinous substance occupying the central cavity of stipe was removed from the fragment, the osmotic value increased to about 14atm., however.
2. It was assumed that the elongation of receptaculum occurred as the result of (a) an increase in size of the cells, followed by (b) the straightening of the folded chamber walls. The volume of each cell of the receptaculum became nearly 12 times as large after elongation as it was at the beginning.
3. The increase in cell size seems to be due mainly to the spontaneous expansion of the cell wall. The source of supplying water to the cells appears to be the gelatinous substance filling all of the chambers and the central cavity of the stipe.
4. The glycogen contained in cells of mature receptaculum disappeared with the progress of expansion, and concomitantly reducing sugar appeared. The increase of the reducing sugar content may be exerted for the maintenance of osmotic value of the cell sap during cell elongation.View full abstractDownload PDF (730K) -
Tokio SUZUKI, Yasumasa NAKANO1965 Volume 78 Issue 923 Pages 177-186
Published: 1965
Released on J-STAGE: October 31, 2006
JOURNAL FREE ACCESSSeit die Hochstaudenwiesen in Japan zuerst durch H. Nakano (1930) bekannt geworden sind, wurden einige weitere aus den montanen und subalpinen Stufen Nordostjapans von K. Yoshioka und anderen Autoren pflanzensoziologisch untersucht. Wir haben eine neue Assoziation der Hochstaudenwiesen aus der alpinen Stufe der japanischen Nordalpen und aus dem Hakusan-Gebirge gekennzeichnet. Es ist das Cirsio-Aconitetum senanensis, das sich durch sechs Kennarten von den anderen Krautgesellschaften oberhalb der Waldgrenze klar unterscheidet. Aconitum senanense und Rumex arifolius kommen auch in den japanischen Südalpen vor, eine verwandte Assoziation wird also auch dort vorhanden sein. Die. Aassoziation wächst zerstreut auf den Schutthalden der Leeseitabhänge des Wintermonsuns, wo sich der Schnee im Winter ansammelt, aber nicht zu spät wegschmilzt. Mit den gemeinsamen Vertretern der Gattung Aconitum und der Cirsium-Carduus-Gruppe zeigt sie eine gewisse Verwandtschaft mit dem europäischen Adenostylo-Cicerbitetum. 6 Arten unserer Tabelle kommen auch in den Hochstaudenfluren des Adenostylo-Cicerbitetum der Schweizer Alpen vor; Rumex arifolius, Viola biflora, Senecio nemorensis, Polygonum bistorta, Milium effusum, Polytrichum juniperinum. Eine gewisse Verwandtschaft mit Kamtschatka zeigt Galium kamtschaticum.
Die Gesellschaft besiedelt sandigen Kiesboden, wo der A-Horizont unmittelbar auf dem Mineralboden aufliegt. Oft säumt sie ein karartiges Gelande. Gegen oben schliefßt sie mit einer scharfen Grenzlinie an das Zwergkiefer-Preißelbeer-Gebüsich (Vaccinieto-Pinetum pumilae) an, das von der Windseite übergreift. Unten gegen die Talsohle entwickeln sich gewöhnlich Schneebodengesellschaften. Der Boden ist unreif infolge der begrenzten Vegetationsperiode und der ziemlich steilen Neigung (30°-40°). Die Assoziation hält sich meist etwas oberhalb der Waldgrenze.View full abstractDownload PDF (3204K)
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