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  • Gibberellin  (5)
  • Pinus ponderosa  (4)
  • Springer  (9)
  • Annual Reviews
  • National Academy of Sciences
  • Springer Science + Business Media
  • 1980-1984  (9)
  • 1980  (9)
Collection
Keywords
Publisher
  • Springer  (9)
  • Annual Reviews
  • National Academy of Sciences
  • Springer Science + Business Media
Years
  • 1980-1984  (9)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Interaction of [3H]gibberellin A1 with a sub-cellular fraction from lettuce (Lactuca sativa L.) hypocotyls (1980)
    Springer
    Planta 148 (1980), S. 485-490 
    Details
    ISSN: 1432-2048
    Keywords: Gibberellin ; Growth temperature ; Lactuca ; Temperature (gibberellin)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The relationship between elongation growth and the incorporation of [3H]gibberellin A1 ([3H]GA1) into a 2,000g pelletable (2KP) fraction from lettuce (Lactuca sativa L., cv. Arctic) hypocotyl sections has been examined. Sections were loaded with incremental amounts of GA1 under conditions where growth was arrested (5° C) or permitted (30° C) and, after 16 h, all were transferred to a GA-free medium at 30° C. Growth and 2KP radioactivity were measured at this point and after a further 24 h in the chase medium. Uptake was reduced by 80% at 5° C, as compared to 30° C, but 2KP labelling and protein synthesis were only reduced by half. The growth rate of the 5° C pretreated sections during the chase period was comparable to that observed during the pulse in the 30° C material but the dose/response relationship was flatter. Low temperature sections incorporated a much higher percentage of GA1 uptake into the 2KP fraction (27% at maximum) but the absolute levels of labelling at this temperature were lower than those measured at 30° C. The data are interpreted as showing that 2KP labelling is not a consequence of growth. It must either precede response or be an unconnected concurrent process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02395319
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  • 2
    Electronic Resource
    Electronic Resource
    Gibberellins and the photoperiodic control of stem elongation in the long-day plant Agrostemma githago L. (1980)
    Springer
    Planta 149 (1980), S. 269-273 
    Details
    ISSN: 1432-2048
    Keywords: Agrostemma ; Gibberellin ; Growth retardant ; Photoperiodism ; Stem elongation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Agrostemma githago is a long-day rosette plant in which transfer from short days (SD) to long days (LD) results in rapid stem elongation, following a lag phase of 7–8 d. Application of gibberellin A20 (GA20) stimulated stem elongation in plants under SD, while 2-isopropyl-4-dimethylamino-5-methylphenyl-1-piperidine-carboxylate methyl chloride (AMO-1618, an inhibitor of GA biosynthesis) inhibited stem elongation in plants exposed to LD. This inhibition of stem elongation by AMO-1618 was overcome by simultaneous application of GA20, indicating that GAs play a role in the photoperiodic control of stem elongation in this species. Endogenous GA-like substances were analyzed using reverse-phase high-performance liquid chromatography and the d-5 corn (Zea mays L.) assay. Three zones with GA-like activity were detected and designated, in order of decreasing polarity, as A, B, and C. A transient, 10-fold increase in the activity of zone B occurred after 8–10 LD, coincident with the transition from lag phase to the phase of rapid stem elongation. After 16 LD the activity in this zone had returned to a level similar to that under SD, even though the plants were elongating rapidly by this time. However, when AMO-1618 was applied to plants after 11 LD, there was a rapid reduction in the rate of stem elongation, indicating that continued GA biosynthesis was necessary following the transient increase in activity of zone B, if stem elongation was to continue under LD. It was concluded that control of stem elongation in A. githago involves more than a simple qualitative or quantitative change in the levels of endogenous GAs, and that photoperiodic induction alters both the sensitivity to GAs and the rate of turnover of endogenous GAs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384564
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  • 3
    Electronic Resource
    Electronic Resource
    The effect of photoperiod on the levels of seven endogenous gibberellins in the long-day plant Agrostemma githago L. (1980)
    Springer
    Planta 149 (1980), S. 274-279 
    Details
    ISSN: 1432-2048
    Keywords: Agrostemma ; Gibberellin ; Photoperiodism ; Stem elongation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The following seven gibberellins (GAs) have been identified by gas chromatography-mass spectrometry in shoots and leaves of the long-day plant Agrostemma githago: GA53, GA44, GA19, GA17, GA20, GA1, and 3-epi-GA1. The levels of these compounds were measured, using selected ion monitoring, during photoperiodic induction. The levels of GA44, GA19, GA17, and GA20 all increased to a peak at eight long days (LD), followed by a decline, while the levels of GA1 and 3-epi-GA1 did not reach a peak until 12 LD. The level of GA53 remained steady over the first 10–12 LD. Later in the LD treatment the levels of GA53, GA44, GA19, and GA17 increased again. The rate of metabolism of all GAs except GA53 was higher after 12–16 LD than under short days. These data thus provide indirect evidence for an effect of photoperiodic induction on GA turnover in A. githago.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384565
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  • 4
    Electronic Resource
    Electronic Resource
    Ethylene, gibberellins, auxin and the apical control of branch angle in a conifer, Cupressus arizonica (1980)
    Springer
    Planta 148 (1980), S. 64-68 
    Details
    ISSN: 1432-2048
    Keywords: Auxin ; Branch angle ; Conifers ; Cupressus ; Ethylene ; Gibberellin ; Hyponasty
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Decapitation, gibberellin A3, high light, their combination, and certain levels of indole-3-acetic acid increase ethylene evolution and also induce branch hyponasty (upturning) in seedlings of Cupressus arizonica Greene, the increase in ethylene preceding obvious hyponasty. Exogenous ethylene also causes branch hyponasty and branches of seedlings maintained in an atmosphere scavenged of ethylene by mercuric perchlorate grow downwards. It is concluded that ethylene may play a role in the apical control of branch angle in some conifers. The positive effect of ethylene in increasing branch hyponasty may be direct, or reflect changes in levels of endogenous auxin and/or gibberellin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00385443
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  • 5
    Electronic Resource
    Electronic Resource
    Interaction of [3H]gibberellin A1 with a sub-cellular fraction from lettuce (Lactuca sativa L.) hypocotyls (1980)
    Springer
    Planta 148 (1980), S. 485-490 
    Details
    ISSN: 1432-2048
    Keywords: Gibberellin ; Growth temperature ; Lactuca ; Temperature (gibberellin)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The relationship between elongation growth and the incorporation of [3H]gibberellin A1 ([3H]GA1) into a 2,000g pelletable (2KP) fraction from lettuce (Lactuca sativa L., cv. Arctic) hypocotyl sections has been examined. Sections were loaded with incremental amounts of GA1 under conditions where growth was arrested (5° C) or permitted (30° C) and, after 16 h, all were transferred to a GA-free medium at 30° C. Growth and 2KP radioactivity were measured at this point and after a further 24 h in the chase medium. Uptake was reduced by 80% at 5° C, as compared to 30° C, but 2KP labelling and protein synthesis were only reduced by half. The growth rate of the 5° C pretreated sections during the chase period was comparable to that observed during the pulse in the 30° C material but the dose/response relationship was flatter. Low temperature sections incorporated a much higher percentage of GA1 uptake into the 2KP fraction (27% at maximum) but the absolute levels of labelling at this temperature were lower than those measured at 30° C. The data are interpreted as showing that 2KP labelling is not a consequence of growth. It must either precede response or be an unconnected concurrent process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00552664
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  • 6
    Electronic Resource
    Electronic Resource
    Interspecific inhibition of the response of the bark beetles,Dendroctonus brevicomis andIps paraconfusus, to their pheromones in the field (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 149-164 
    Details
    ISSN: 1573-1561
    Keywords: Dendroctonus brevicomis ; Ips paraconfusus ; Pinus ponderosa ; bark beetle ; exo-brevicomin ; frontalin ; myrcene ; verbenone ; trans-verbenol ; attractants ; inhibition ; pheromones
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Ponderosa pine logs infested withIps paraconfusus males inhibited the attraction ofDendroctonus brevicomis in the field to either attractive logs cut from a ponderosa pine tree under attack byD. brevicomis or to their synthetic pheromones,exo-brevicomin, frontalin, and myrcene. Logs cut from trees under attack byD. brevicomis inhibited the response ofI. paraconfusus to logs infested with maleI. paraconfusus.Exo-brevicomin, frontalin, and myrcene did not inhibit their response but verbenone did. Verbenone was found in maleD. brevicomis dissected from attractive logs under attack during the same time the response ofI. paraconfusus was inhibited by these logs.Trans-verbenol andexo-brevicomin were found in femaleD. brevicomis while verbenone,trans-verbenol, and frontalin were found in maleD. brevicomis in relatively large amounts near the beginning of the aggregation phase of host colonization. All of these compounds had decreased at a similar rate 5 days later. This gradual decrease inexo-brevicomin and frontalin probably caused the observed reduction in attraction. The ecological significance of these compounds in relation to termination of the aggregation phase ofD. brevicomis and reduction of interspecific competition is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987534
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  • 7
    Electronic Resource
    Electronic Resource
    Field responses of the western pine beetle1 and one of its predators to host- and beetle-produced compounds (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 625-641 
    Details
    ISSN: 1573-1561
    Keywords: Pinus ponderosa ; Dendroctonus brevicomis ; Temnochila chlorodia ; pheromone ; kairomone ; exo-bievicomm ; frontalin ; trans-ver-benol ; verbenone ; terpenes ; Coleoptera ; Scolytidae ; Trogositidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The responses of the western pine beetle (Dendroctonus brev-icomis LeConte) andTemnochila chlorodia (Mannerheim) to candidate attractants—exo- andendo-brevicomm, frontalin,trans-verbenol, ver-benone, and ponderosa pine turpentine and its major monoterpene components—were quantified by counts of beetles on traps baited with the various attractants, singly and in combinations released simultaneously. Combinations ofexo-brevicomin and frontalin plus a monoterpene or turpentine were the most attractive toD. brevicomis. The responses to these attractant combinations were reduced when verbenone plustrans-verbenol were present. All single compounds and binary mixtures, exceptexo-brevicomin plus frontalin, were much less attractive.exo-Brevicomin was most attractive toT. chlorodia, and this response appeared to decrease when verbenone plustrans-verbenol were present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987674
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  • 8
    Electronic Resource
    Electronic Resource
    Pheromone production by the bark beetle,Ips paraconfusus, in the nonhost, white fir (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 979-987 
    Details
    ISSN: 1573-1561
    Keywords: Ips paraconfusus ; pheromones ; nonhost ; Abies concolor ; Pinus ponderosa ; ipsenol ; ipsdienol ; bark beetle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract MaleI. paraconfusus confined to artificial entrance tunnels in white fir logs produced the pheromone compounds ipsenol and ipsdienol in their hindguts. The hindguts were attractive to females in a laboratory olfactometer and the male infested logs were attractive in field bioassay. The amount of pheromones produced and the amount of feeding and boring activity is much less in white fir than in ponderosa pine. There were no pheromones detected in the hindguts of recently emerged, unfed males.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00994655
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  • 9
    Electronic Resource
    Electronic Resource
    Effects of verbenone andtrans-verbenol on the response ofDendroctonus brevicomis to natural and synthetic attractant in the field (1980)
    Springer
    Journal of chemical ecology 6 (1980), S. 997-1013 
    Details
    ISSN: 1573-1561
    Keywords: Pinus ponderosa ; Dendroctonus brevicomis ; verbenone ; trans-verbenol ; tree protection ; bark beetle ; pheromones ; interruptant ; Coleoptera ; Scolytidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Verbenone andtrans-verbenol were investigated as candidate interruptants for use as tree protectants. Verbenone andtrans-verbenol, pheromones released byDendroctonus brevicomis during host colonization, reduced the trap catch ofD. brevicomis near sources of the attractant composed ofexo-brevicomm, frontalin, and myrcene. Catch reduction at some trap positions was greater at a high release rate than at a low release rate oftrans-verbenol alone and of the combination of verbenone plustrans-verbenol. Verbenone also reduced catches at traps baited with attractive bolts from trees under attack byD. brevicomis. Attempts to use verbenone to protect living trees fromD. brevicomis attack were inconclusive.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00994657
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