植物学雑誌
Online ISSN : 2185-3835
Print ISSN : 0006-808X
ISSN-L : 0006-808X
42 巻 , 495 号
選択された号の論文の5件中1~5を表示しています
  • Y. Kuwada
    1928 年 42 巻 495 号 p. 117-129
    発行日: 1928年
    公開日: 2011/01/26
    ジャーナル フリー
    In this paper an occurrence of restitution-nuclei in the formation of the embryosacs in Balanophora japonica has been reported.
    The number of chromosomal elements found on the equatorial plate of the heterotype division varies from 94 to 112 so far as the present investigations are concerned. There is a correlation between the number of these elements and their sizes. These facts seem to show that at least in some of the chromosomes there is a tendency to form gemini, but the number of such chromosomes varies in different embryosac mother cells. The chromosome number in somatic Cells seems to be not far from the largest number counted in the heterotype division, 112.
    The present investigations were undertaken at Prof. FUJII'S suggestion and under his supervision more than ten years ago. In publishing this little note, the writer wishes to express his sincerest thanks to Prof. FUJII for his advice and criticism throughout the work, and for his kindness in giving the writer permission to use his material.
  • M. Honda
    1928 年 42 巻 495 号 p. 129-137
    発行日: 1928年
    公開日: 2011/01/26
    ジャーナル フリー
  • 萩原 時雄
    1928 年 42 巻 495 号 p. 137-154
    発行日: 1928年
    公開日: 2011/01/26
    ジャーナル フリー
    1、花色、花筒色、莖色等ノ生成ニ關與スル遺傳因子Ca.C並ニRノ化學的性状並ニ其等因子間ノ生理化學的關係ヲ明ニナナント企圖セリ。
    2、遂傳實験ハC.Caハ各單獨ニテハRト色素ヲ生成セザルコトヲ示スヲ以テR又ハRtガ作用シテ、花冠、花筒ニアントチアンヲ生成セシムベキChromogenic substancesハCトCaニ因子ニ關與スル物體ニヨリテ生成サルルモノト考へラル。而テ、ソノChromogenic substanceハ化學的處理ニヨリテフラヴオンナリト考ヘラル。且ソノフラヴオンハ側ベシゼン核ニOH又ハOCH3ヲ有スルモノナルベシ。フラヴオン生成ニ關與スルト考ヘラルルC・Ca兩因子ガ如何ナル化學物質ニ關與スルカハ不明ナリ。而テ、花冠ハC.Caニョリテ生成サル、フラヴオンガ1種ノenzume Rtニテ還元サレテ生成スルアントチアン色素ニテ着色サレ、花筒ハ同フラヴオンガ1種ノenzume Rtニテ還元サレテ生成スルアントチアン色素ニテ着色サル、モノナルベシ。
    3、莖色ハ柴田博士ノ所謂Colourless Anthocyaninナル化學組成未知ノ物質ニ關與スルX因子並ニCaトRニテ生成サルルアントチアン色素トPhlobaphene色素ヲ含ム。而テ、CaトXトハ同一物質ニ關スル同一因子ニ歸スベキモノカ、或ハ特別ノ關係ヲ兩者ノ間ニ存スルモノナルカ不明ナリ。
    4、種子ノ色素モ前記化學組成未知ノ物質ノ酸化ニョリ生ズルPhlolophenes色素ト考ヘラル。而テ、ソノ酸化完全ナル時ハ黒色ニ不完全ナル時ハ茶褐色トナルナラン。
    5、五種ノ遺傳組成明ナル植物ノ白色花ヲ比較スルニ其等植物ノ黄色花、クリーム花ハ何レモCr型ニ屬スルモノト考ヘラル。
    6、斑點花ニ關與スル三因子S'.S2'Sアリ。コレ等ハRニ作用シ其ノ能力ヲ支配スルモノナルベクRノ能力完全ニシテ花冠一様ニアントチアンノ生成サルルニハS1.S2ノ共存ヲ要ス。S1.S2ノ何レカ、又ハ兩者ナキ場合ニハRノ能力ハ一様ニ發達セズ、從ツテアントチアン色素ハ斑状トナリ斑點花ヲ結果ス。
    7、黄色地色因子Yガソノ能力ヲ發揮スルニハCノ外Caノ存在ヲ要ス。而テCa.C.Yニテ生成サレタル物質ハ恐ラクフラヴオンニシテCa.Cニテ生ゼルフラヴオンニ比シOHノ多キモノナラン。
    8、あさがほノ花冠ノ色彩ハアントチアン色素ニ基クモノニシテ其ノ色彩列ハ遺傳實驗ニ基キ次ノ如ク分チウベシ。遺傳式明色列{CaCRKPB藍色群CaCRKPb CaCRKpB}紫色群CaCRKpb紅色群暗色列{CaCRkPB灰藍色群CaCRkPb灰紫色群CaCRkpB CaCRkpb}灰赤色群暗色列ノ色彩ハ明色列色彩ニ灰色ヲ含メル所ノdull colourニシテ、コレ等明暗ニ關スルK因子ニハ明色列ノ色彩發達ニ對シテ補足的關係アルK1.K2ヲ含ムモノト考ヘラル。
    此等花色ニ關與スルK1K2.P.B等ノ因子ガ如何ナル化學物質ニ又化學的性状ト關係ヲ有スルカ今後ノアントチアンノ化學的研究ニ待タザレバ不明ナリ。
    9、あさがほノ葉色ハ緑色、黄色ニ大別サルルモ、時ニ子葉白色ノ所謂白子 (albino) 出現ス。勿論コノ如キ個體ハ子葉時代ニテ枯死スルガ常ナリ。遺傅實験ハ是等葉色ニ關シG.G'.G''ノ三因子ヲ示ス。是等因子ガアントチアン生成ニ關與スル遺傳因子Ca.C.Rトノ關係並ニWILLSTATTER氏等ノChlorophylla.b., Carotin, Xanthophyll等ノ色素トノ關係ハ今後ノ遺傳生理學的研究ニョラザレバ不明ナリ。
    10、あさがほノアルビンハ次ノ如ク大別サル。
  • 西山 市三
    1928 年 42 巻 495 号 p. 154-177
    発行日: 1928年
    公開日: 2011/01/26
    ジャーナル フリー
    It is of great interest to know the correlation between chromosome numbers and the intensity of the function of gametes which are produced from a pentaploid wheat hybrid. In order to study this problem I used mainly 41-chromosome plants (20II+1I) that were (D-2g×T. spelta) F1, (D-2f×T. spelta) F1 and reciprocal crosses. If one univalent chromosome is not lost in the meiosis of spore mother-cells, 20-and 21-chromosome gametes are produced in a 1:1 ratio. But by the “Äquationskreuzung” we have found 20-and 21-chromosome megaspores in a ratio 73:27; then the chance of one univalent chromosome loss in the meiosis of E. M. C. is 46 per cent in (D-2g×T. spelta) F1, and 42 per cent in (D-2g×T. spelta) F1 (Table II). This is in close agreement with KIHARA'S (1924) and WATKINS'(1924, 1925) results that were studied chiefly with P. M. C. We may conclude, therefore, that loss of chromosomes occurs with about the same frequency in the microspore formation as in the megaspore formation. On the other hand it was found that among the progenies of the “Zertationskreuzung” D-2g×(D-2g×T. spelta) F1 and T. spelta×(D-2g×T. spelta) F1, in average only 11 per cent was fertilized by 20-chromosome microspores, and among D-2g×(D-2g×T. spelta) F1 and T. spelta×(D-2g×T. spelta) F1 37 percent (Table III). We can assume that the discrepancy in the microspore ratio is probably largely accounted for by a slower growth rate of pollen-tubes from 20-chromosome microspores. If the ratios of effective 20-and 21-chromosome gametes be 73:27 in the female and 11:89 in the male, we should expect the 40-, 41-and 42-chromosome progenies of a self-fertilized 41-chromosome plant to be in the ratio 8:68:24 in (D-2g×T. spelta) F2; and 27:56:17 in (D-2g×T. spelta) F1. As shown in Table I the observed ratios are roughly in agreement with the calculated ones, i. e, 11:69:20 in the former, and 14:69:17 in the latter.
    A state of affairs similar to that mentioned above was found in Oenothera lata, the “globe” mutant of Datura, and the “enlarged” mutant of Nicotiana. But in these cases the extra chromosöme is probably duplicated with one of those normally present in the gamete (n+1), and in the case under consideration, on the contrary, one chromosome is wanting (n-1).
    In F2 progenies we have found some plants with unexpected chromosome combinations, and various chromosome numbers (Table VI), and among them a plant with a non-viable combination, 19II+1I, was found to be most sterile.
    Although the fertility in a selfed D-2g is as low as 56 per cent, male and female gametes, are effective more than 83 per cent even in artificial pollination (Table IV).
    On the sterility in wheat hybrids there are now two hypotheses, i. e. gametic and zygotic sterility hypotheses. My results clearly give strong support to the hypothesis of zygotic terility.
    The allelomorphic characters for awns, and hairs on glumes are transmitted by two different simple Mendelian factors which do not lie in the g-or f-chromosome.
  • 1928 年 42 巻 495 号 p. 178-190
    発行日: 1928年
    公開日: 2011/01/26
    ジャーナル フリー
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