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| 1. |
An ‘Indigenous Induced’Phormium tenaxForst. swamp in New Zealand. |
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Journal of the Linnean Society of London, Botany,
Volume 53,
Issue 349,
1946,
Page 63-70
A. L. Poole,
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PDF (822KB)
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ISSN:0368-2927
DOI:10.1111/j.1095-8339.1946.tb00407.x
出版商:Blackwell Publishing Ltd
年代:1946
数据来源: WILEY
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| 2. |
Contributions to the Life History and Biology ofDigitalis purpurea. I. The Development of the Ovule. |
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Journal of the Linnean Society of London, Botany,
Volume 53,
Issue 349,
1946,
Page 71-82
Comyns J. A. Berkeley,
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PDF (880KB)
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摘要:
SUMMARY1The young ovule ofDigitalis purpureahas one integument four or five cells thick and a single‐layered nucellus enclosing a spore mother cell from which a linear tetrad of megaspores is formed. The chalazal megaspore enlarges while three sets of nuclear divisions are occurring, crushing the three other megaspores and the nucellus so that in later stages of development an epithelium, derived from the inner epidermis of the integument, is the immediate investment of the embryo sac.2Antipodal cells are delimited before the cells of the egg apparatus.3Prom measurements made of the various parts of the ovule it is deduced that, “until vacuolation starts in the primary embryo‐sac mother cell, the integument compresses the parts within it, but that this vacuolation results in a counter pressure by which the three aborting megaspores, the nucellus and the inner part of the integument around the micropyle are crushed, the outer part of the last possibly being distorted so that the total length of the ovule becomes less.4The possibility is discussed that the surface of contact between the integument and the nucellus delays the passage of solutes from the integument inwards, except where they form a continuous tissue at the chalaza, thus creating in this region a priority of supply which enables the chalazal megaspore to succeed and the antipodal cells to develop precociously.This research was carried out with apparatus purchased with a grant from the Dixon
ISSN:0368-2927
DOI:10.1111/j.1095-8339.1946.tb00408.x
出版商:Blackwell Publishing Ltd
年代:1946
数据来源: WILEY
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| 3. |
Typification and Variation in the Smooth‐Leaved Elm,Ulmus carpinifoliaGleditsch. |
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Journal of the Linnean Society of London, Botany,
Volume 53,
Issue 349,
1946,
Page 83-90
R. Melville,
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PDF (631KB)
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ISSN:0368-2927
DOI:10.1111/j.1095-8339.1946.tb00409.x
出版商:Blackwell Publishing Ltd
年代:1946
数据来源: WILEY
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| 4. |
New and little‐known wild potato species from Bolivia and Peru. |
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Journal of the Linnean Society of London, Botany,
Volume 53,
Issue 349,
1946,
Page 91-108
M. Cárdenas,
J. G. Hawkes,
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PDF (1350KB)
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ISSN:0368-2927
DOI:10.1111/j.1095-8339.1946.tb00410.x
出版商:Blackwell Publishing Ltd
年代:1946
数据来源: WILEY
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| 5. |
An account of some abnormal plants ofSalvia VerbenacaL. andS. pratensisL.; together with a physiological interpretation of the phenomena observed in terms of growth hormone concepts. |
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Journal of the Linnean Society of London, Botany,
Volume 53,
Issue 349,
1946,
Page 109-122
D. A. Coult,
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PDF (1066KB)
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摘要:
SUMMARY1Seven abnormal shoots, three ofSalvia Verbenacaand four of8; pratensis, are described with special reference to the deviation that they show in leaf insertion from the normal decussate arrangement; reference is also made to the distortion of the axis, and the fusion of leaves and bracts consequent upon this deviation.2Two instances are described of the establishment of trimerous whorls based on a theoretical leaf divergence of 144.3Schoute's theory of binding whorls is discussed and extended in terms of growth hormone concepts and possible events at the shoot apex.
ISSN:0368-2927
DOI:10.1111/j.1095-8339.1946.tb00411.x
出版商:Blackwell Publishing Ltd
年代:1946
数据来源: WILEY
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