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  • 1965-1969  (10)
  • 1
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    Induction of Tension Wood by 2,3,5-Tri-iodobenzoic Acid (1965)
    Springer Nature
    Details
    Publication Date: 1965-02-01
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Springer Nature
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  • 2
    Electronic Resource
    Electronic Resource
    Induction of Tension Wood by 2,3,5-Tri-iodobenzoic Acid (1965)
    [s.l.] : Nature Publishing Group
    Nature 205 (1965), S. 816-818 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The formation of tension wood is one of the few responses of plants to stimuli involving physiological processes which result in recognizable changes in anatomy. Our observations indicate a similar anatomical response following the application of the auxin-antagonist 2,3,5-tri-iodobenzoic acid ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/205816a0
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  • 3
    Electronic Resource
    Electronic Resource
    Induced structural changes in cambial derivatives ofUlmus americana (1966)
    Springer
    Protoplasma 62 (1966), S. 76-85 
    Details
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01254634
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  • 4
    Electronic Resource
    Electronic Resource
    The effect of plant growth substances on the development of tension wood in horizontally inclined stems ofAcer rubrum seedlings (1968)
    Springer
    Protoplasma 65 (1968), S. 379-391 
    Details
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In horizontally placedAcer rubrum seedlings the development of tension wood is inhibited by auxin especially when applied along the upper side of the axis. Treatment separately with GA and K does not alter the normal pattern of tension wood formation. The development of tension wood appears to be correlated with a reduced auxin level on the upper side of the stem. Geotropic reorientation of the woody stem ofAcer rubrum seedlings that are placed in the horizontal position is related closely to the amount of tension wood that is formed on the upper side of the axis. Evidence is discussed which indicates that tension wood itself participates actively in the reorientation mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01666298
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  • 5
    Electronic Resource
    Electronic Resource
    Induction of tension wood by 2,4-dinitrophenol and auxins (1968)
    Springer
    Protoplasma 65 (1968), S. 393-405 
    Details
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The effect of DNP and auxins on the development of the secondary xylem in erect stems ofAcer rubrum was studied. DNP affected the development of the secondary xylem only locally in the treated internode. Tension wood is formed in the stem below the DNP treatment site whereas above the application site the development of tracheary elements is altered. InAcer rubrum seedlings that were treated with auxin, especially at low concentrations, a thick ring of tension wood is developed in the erect stem below the treatment site. Previous suggestions that the formation of tension wood in arborescent angiosperms is a developmental response to auxin deficiency are discussed in terms of the induction of tension wood inAcer rubrum by DNP and auxins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01666299
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  • 6
    Electronic Resource
    Electronic Resource
    Cell division in leaves ofNicotiana (1968)
    Springer
    Protoplasma 65 (1968), S. 1-24 
    Details
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Young leaves ofNicotiana tabacum were fixed in glutaraldehyde-formaldehyde followed by osmium tetroxide. The fine structure of dividing cells was studied. Before prophase a band of microtubules was observed between the nucleus and the cell wall at a position judged as the future plane of division. The microtubules in the band are 4–6 units deep and relatively closely packed, giving sections of the band a characteristic appearance. Micro-tubules of the mitotic spindle, the phragmoplast, and the preprophase band are morphologically similar. Some of the microtubules of the mitotic spindle and the phragmoplast have an undulate appearance. It is suggested that the undulate microtubules may have been fixed at a time when microwaves were traveling along them. The cell plate is formed by a fusion of small smooth surfaced vesicles and small coated vesicles. Fusion of small vesicles results first in larger vesicles and then in a meshwork of new cell-wall material surrounded by new regions of plasma membrane. Most of the vesicles are derived from dictyosomes and may be produced before and during prophase as well as during later stages of division. The ER may also contribute some vesicles to the cell plate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01666368
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  • 7
    Electronic Resource
    Electronic Resource
    Developmental changes in the secondary xylem ofAcer rubrum induced by various auxins and 2,3,5-tri-iodobenzoic acid (1968)
    Springer
    Protoplasma 65 (1968), S. 287-313 
    Details
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary TIBA has been applied laterally to actively growing stems of uprightAcer rubrum seedlings. The frequency of initiation of tracheary elements is reduced and a complete ring of tension wood is developed in the stem locally below the TIBA application site. Rings of tension wood were never formed above the TIBA treatment site. In regard to anatomy, lignin distribution and peroxidase activity, the tension wood fibers formed as a result of TIBA treatment are identical to those which can be induced by bending. In the region of the stem above the site of TIBA application there is a particularly strong alteration in the development of tracheary elements. Application of IAA, NAA, or 2,4-D to the TIBA treatment site suppresses the capacity of TIBA to induce the development of tension wood and at the same time generally increases the frequency of initiation of tracheary elements. The effect of auxin alone on theAcer rubrum system has been studied. The secondary xylem formed during treatment with auxins (especially 2,4-D and NAA) at the stated concentrations is generally characterized by large groups of tracheary elements with a conspicuous angular outline in transverse section. The evidence suggests that auxins are involved in the regulatory systems which bring about the orderly development of the secondary xylem in arborescent angiosperms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01682534
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  • 8
    Electronic Resource
    Electronic Resource
    Fine structure of the aesthetasc hairs ofPagurus hirsutiusculus dana (1968)
    Springer
    Protoplasma 66 (1968), S. 1-20 
    Details
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The thin-walled aesthetasc pegs on the antennules of a small hermit crab,Pagurus hirsutiusculus, were studied by light and electron microscopy. The lumen of each aesthetasc was found to be filled with the dendrites of 300–500 bipolar neurons whose cell bodies lie beneath the base of the aesthetasc. These dendrites are ciliary in nature, having well developed basal bodies and rootlets. Each basal body gives rise to a cilium which divides to form a cluster of slender branches, each of which contains a microtubule running lengthwise. These structures occupy most of the length of the hair. The cuticle of the aesthetasc wall is thin and tenuous. Except for the pore canals in the basal region, we have found no pores at either light or electron microscope level, but as the hair is extremely permeable, we conclude that the cuticle itself may permit the passage of solutions. This permeability of the cuticle and the large numbers of dendrites within support the hypothesis that the aesthetascs are chemoreceptors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01252520
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  • 9
    Electronic Resource
    Electronic Resource
    Developmental changes in the secondary xylem ofAcer rubrum induced by gibberellic acid, various auxins and 2,3,5-tri-iodobenzoic acid (1968)
    Springer
    Protoplasma 65 (1968), S. 315-326 
    Details
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The effect of GA on the development of the secondary xylem ofAcer rubrum was studied. GA was applied to seedlings (1) separately, (2) simultaneously with TIBA, and (3) simultaneously with TIBA and an auxin. GA alone is without effect on the development of the secondary xylem. In seedlings treated with TIBA-GA or TIBA-GA-auxin, the differentiation of the xylem elements is in general similar to that of seedlings treated with TIBA or TIBA-auxin respectively. GA however, does stimulate cambial activity in a localized region of the stem if the endogenous rate of cambial division is low.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01682535
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  • 10
    Electronic Resource
    Electronic Resource
    Fine structure of the aesthetasc hairs of Coenobita compressus edwardsThis work was supported by University of California Faculty grant 308 and U.S. Public Health Service grant NB04372. (1968)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 124 (1968), S. 361-385 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The aesthetascs, short thin-walled pegs on the antennule flagella of Coenobita clypeatus, a terrestrial hermit crab, are similar to those of other decapod crustacea in containing the dendrites of many bipolar neurons whose cell bodies are grouped in spindle-shaped masses beneath the bases of each hair. The dendrites contain rootlets, basal bodies, and cilia, which divide dichotomously before entering the aesthetasc, so that within the hair, each cilium becomes represented by a group of slender branches.The aesthetascs themselves are short, blunt, and partially recumbent so that each has an exposed and an unexposed side. The cuticle on the exposed side is thinner and more tenuous than that on the protected side, and the dendrite branches are concentrated just underneath. The protected side, on the other hand, is lined with nondendritic supporting cells, and the cuticle is thicker, more lamellar, and probably less permeable.All dendritic elements proximal to the dendrite branches are enclosed within the main body of the antennular flagellum, and the initial segments of the cilia lie within a vacuole. In these respects, the aesthetascs of Coenobita resemble the thin-walled pegs on insect antennae more than they do those of the marine decapods thus far examined. This convergence in the terrestrial forms may be in response to the need to conserve water.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051240309
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