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Volume 63, Issue 743-744
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Fuji YOSHIMURA1950 Volume 63 Issue 743-744 Pages 63-69
Published: 1950
Released on J-STAGE: January 26, 2011
JOURNAL FREE ACCESSIn lemnaceous plants the iron-deficiency caused chlorosis and poor growth, showing the increase in number of connected fronds. Moreover, the formation of anthocyan and resting fronds were accompanied especially in Spirodela polyrhiza. Oxalates both in the form soluble and insoluble accumulated, when the culture solution was deficient in iron or nitrogen. However, the amount of the accumulating oxalate decreased secondary as the result of pathlogical condition of the piant body, when the deficiency in those elements became extreme.
Lemnaceous plants utilized nitrates and ammonium salts as the nitrogen source, but in the latter case, especially when salts of strong acids were used, the plants wereharmfullyaffectedbytheincreasedphysiologicalacidityanddiedatlast. Nitrites and urea were also tolerably well available.
The lowest pH-value of the culture solution which permits the existence of the plants was about 3.8.This pH-value, however could be further lowered to 3.2-3.4, if CaCl2 (0.001-0.01mol) was added to the culture solution as antagonist against hydrogen ion.The similar effect could be recognized also in MgCl2 or Al2K2 (SO4) 2.
The resting fronds of the lemnaceous plants does not bud directly after its formation, even if the surrounding condition is regulated in favour of the growth. In the natural vegetation the resting fronds is awoke in early winter, probably by the in fluence of low temperature. The dormancy could be artificially removed by the treatment with 3% sodium sulphocyanate for 1-2hours, 0.1% heteroauxin for 2 hours, or 95% alcohol 1-2 hours.View full abstractDownload PDF (1077K) -
1950 Volume 63 Issue 743-744 Pages 70,92-
Published: 1950
Released on J-STAGE: February 20, 2024
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Yoshitomo Nozu1950 Volume 63 Issue 743-744 Pages 71-76
Published: 1950
Released on J-STAGE: January 26, 2011
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Kazuo OTI1950 Volume 63 Issue 743-744 Pages 77-82
Published: 1950
Released on J-STAGE: January 26, 2011
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III. Beziehung zwischen der Verbreitung von D. hirsuta und der geologischen Formation an die Kalkgebiete Kawara-dakeSeizi TATUNO1950 Volume 63 Issue 743-744 Pages 83-88
Published: 1950
Released on J-STAGE: January 26, 2011
JOURNAL FREE ACCESSIn meinen vorigen Berichten (1938 '39a, b, '41, '46) teilte ich mit, dass bei Dumortiera hirsuta drei Varietäten mit Chromosomenzahlen, 9, 18 und 27, vorkommen, und dass die Verbreitung dieser Varietäten in engem Zusammenhang mit der geologischen Formation und zwar mit der Wasserstoffionenkonzentration des Substrats steht. In der voligen Arbeit ich naher die Beziehung zwischen der Verbreitung der drei Varietäten von D. hirsuta und der geologische Formation in dem Kalkgebiete Kawara-dake. Die 9 chromosomige Varietät wurde nur auf dem Kalksteine gefunden, während die 18 und 27-chromosomigen Varietäten aber nicht nur auf dem Kalksteine, sondern auf einigen anderen Arten der Gesteinen getroffen wurden. Daher können die Varietäten mit mehr Chromosomen auf verscheidenen Gesteinen wachsen als die Varietaten mit weniger Chromosomen. Das stimmt mit dem Ergebnisse meiner vorigen Arbeit überein.View full abstractDownload PDF (932K) -
II. Fungi and AlgaeMasami SATO1950 Volume 63 Issue 743-744 Pages 89-91
Published: 1950
Released on J-STAGE: January 26, 2011
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Rokuya IMAZEKI1950 Volume 63 Issue 743-744 Pages 93-96
Published: 1950
Released on J-STAGE: January 26, 2011
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Haruo OKUNO1950 Volume 63 Issue 743-744 Pages 97-106_4
Published: 1950
Released on J-STAGE: January 26, 2011
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