Shokubutsugaku Zasshi

Light-sensitivity against the Germination II

Interaction of Light and Darkness on the Germination of Epilobium cephalostigma Seeds

Sigeo ISIKAWA

1955 Volume 68 Issue 804 Pages 173-179
Published: 1955
Released on J-STAGE: December 05, 2006

DOIhttps://doi.org/10.15281/jplantres1887.68.173

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Über den Einfluss von Auxin auf die Stoffpermeabilität des Protoplasmas

II. Mitteilung. Harnstoffpermeabilität des Protoplasmas von Avena-Koleoptile

Yoshio MASUDA

1955 Volume 68 Issue 804 Pages 180-183
Published: 1955
Released on J-STAGE: December 05, 2006

DOIhttps://doi.org/10.15281/jplantres1887.68.180

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Cytological and Morphological Studies on the Gametophytes of Ferns IX

The Polar Plasmolysis on Fern-prothallium (2)

Isami IGURA

1955 Volume 68 Issue 804 Pages 184-186
Published: 1955
Released on J-STAGE: December 05, 2006

DOIhttps://doi.org/10.15281/jplantres1887.68.184

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Cytological Studies in Ranunculaceae II

The Karyotypes of Anemone and Hepatica

Masahide KURITA

1955 Volume 68 Issue 804 Pages 187-190
Published: 1955
Released on J-STAGE: December 05, 2006

DOIhttps://doi.org/10.15281/jplantres1887.68.187

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1.Karyotype studies were made on eight species and two varieties in Ranunculaceae. The results obtained are as follows: Anemone hupehensis var joponica A. stolonifera A. stolonifera var. plena A. virginiana }K(2n)=16=8A^m+2B^sm +2C^st+2D^st₁+2^tD^st₂ A. nikoensisK(2n) =16=8A^m+2B^sm+2^tC^st+2^tC^st+2^tD^st₁+2^tD^st₂ A. coronaria K(2n)=16=8A^m+2B^sm +2C^st+4^tD^st A. hybrida K(2n)=16=7A^m₁+^csA^m₂ + 2B^sm +2C^st+3D^st₁+^tD^st₃ A. narcissifloraK(2n)=14=10A^m+2^tB^sm +2C^st A. Keiskeana K(2n)=28=24A^m+4^tB^st Hepatica acuta K(2n)=14=12A^m+2^tB^st 2.From the karyotype analysi the two Anemone-species A. narcissifiora and A.Keiskeana are more similar to Hepatica acuta than to the other Anemone-species

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Crystal Habits of Oxalates of Alkaline Earth Metals and Their Botanical Meanings

Wataru TAKAMI

1955 Volume 68 Issue 804 Pages 191-195
Published: 1955
Released on J-STAGE: December 05, 2006

DOIhttps://doi.org/10.15281/jplantres1887.68.191

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In the present investigation, the effects of various ions on the crystal habits of oxalates of alkaline earth metals were observed.
(1) The standard form of the calcium oxalate has a ratio or 1:2:3 of three axial lengths.
(2) The effect of pH is not so strong, if the variation range of pH is small.
(3) Disturbing effect of NO₃^-, Cl^-, SO₄^-- and OH^- increases according to this order and complex effect of NO₃^- and SO₄^-- is remarkable.
(4) Disturbing effects of positive ions is generally stronger than that of negative ions. Effects of Cu⁺⁺, Fe⁺⁺, Na⁺, K⁺, Mg⁺⁺, NH₄⁺ were observed. Especially in the cases of Mg⁺⁺ and NH₄⁺, action of transforming things into needle-like shape “raphide” is observed and compared with the form in the plant cells.
(5) Existence and non-existence of NH₄⁺ in the various cells were checked and the above experiments could be positively examine, in this case, and the related experiments were done for this reason. As the results of above considerations, one may conclude _ for the first time that one and the chief reason for “raphide” formation, formerly considered as an attribute of the Monocotyledoneae is due to the existence of NH₄⁺.

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On the Chromosomes in Some Mosses

IX. Karyotype, Sex Chromosome and Polyploidy of Genus Hypnum.

Koji YANO

1955 Volume 68 Issue 804 Pages 195-199
Published: 1955
Released on J-STAGE: December 05, 2006

DOIhttps://doi.org/10.15281/jplantres1887.68.195

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1) The karyotypes of examined four species belonging to the genusHypnum are as follows; Hypnum circinatulum Schimp. _??_K(n)=6=V(X)+2V+2J+m(h) _??_K(n)=6=V(Y)+2V+2J+m(h) Hypnum plumaeforrne Wils. _??_K(n)=10=V(X)+4V+4+m(h) _??_K(n)=10=V(Y)+4V+4+m(h) Hypaum Fujiyamae (Broth.) Par. _??_K(u)=10=V(H)+4V+4+m(h) Hypnum reptile Michx. _??_K(n)=11=2V(H)+4V+4+m(h)
2) H. circinatulumis the basic species of this genus, and the other three are the hypodiploid species missing one h (H reptile) or one set of H and h ((H. plumaeforme, H. Fujiyamae).
3) The sex chromosomes X and Y which have been found inH. circinatulum andH. plumaeformeare the same in chromosomal morphology, but there was observed a slight difference between their heteropycnosis.
4) The two H chromosomes of monoeciousH. reptilemay be the sex chromosomes X and Y, because their morphology and heteropycnosis are similar to those of the sex chromosomes X and Y ofH. circinatulum, etc.

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