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  • 1
    Electronic Resource
    Electronic Resource
    Accelerated Release of Ethylene by Cotton following Application of Indolyl-3-acetic Acid (1964)
    [s.l.] : Nature Publishing Group
    Nature 201 (1964), S. 99-99 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Deltapine-TPSA cotton plants, 35 days old, were divided into two groups and one lot was sprayed with 1-4 x 10-2 m.moles IAA per plant. Since previous experiments revealed that the carrier solvent (aqueous 10 percent ethanol with 1 per cent 'Tween 20') would not significantly influence ethylene ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/201099a0
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  • 2
    Electronic Resource
    Electronic Resource
    Ethylene and plant responses to stress (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 100 (1997), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: When plants are subject to a variety of stresses they often exhibit symptoms of exposure to ethylene. Although this relationship usually results from induction of ACC synthase thus raising the concentration of the precursor of ethylene, it is now apparent that there are numerous other ways that stresses produce ethylene-like symptoms. This complex relationship between stress and ethylene-like symptoms is here termed the stress ethylene syndrome. ACC synthase exists as a multi-gene family whose individual members are differentially regulated, many by various stresses. In addition, ACC oxidase. AdoMet synthetase, enzymes in the Yang methionine cycle, and enzymes that conjugate ACC are regulated by stress. In more unusual cases, ethylene production is not increased by stress or may be reduced. There is evidence for stress effects on perception of ethylene and the potential exists that some steps of the ethylene signal transduction pathway may be influenced by stress. Because of the variability possible in the stress ethylene syndrome, it continues to be studied for a number of stresses and species. In particular, attention is being given to wounding, mechanical stress, drought, heat and water deficit stress, chilling, air pollution, chemical and salt stress, and low O2stress. It is becoming more apparent that a number of stress responses involve interactions with other hormones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1997.tb03068.x
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of 2,4-Dichlorophenoxyacetic Acid on the Production of Ethylene by Cotton and Grain Sorghum (1962)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 15 (1962), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1962.tb08045.x
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  • 4
    Electronic Resource
    Electronic Resource
    Manipulation of IAA-Oxidase Activity and Auxin-Deficiency Symptoms in Intact Cotton Plants with Manganese Nutrition (1976)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 37 (1976), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Cotton (Gossypium hirsutum L. cv. Deltapine 15) seedlings were grown in solution culture in which the Mn2+ level was varied. Following an initial period, a series of shifts in manganese nutrition were employed, each lasting 14 days. Appearance was observed and fresh weight, IAA oxidase (IAAO), peroxidase and IAAO inhibitor levels were determined. After the initial 3 weeks of treatment, growth was negatively correlated with IAAO (or peroxidase) activity. All shifts in manganese nutrition resulted in predicted changes in IAAO activity, growth and plant appearance during a second 2-week period of the experiment. Continuously deficient plants exhibited highest leaf abscission and IAA oxidase activity, and lowest growth of all treatments. Plants shifted from deficient to control levels of Mn2+ exhibited a marked decline in IAAO activity, increase in growth and absence of leaf abscission. Plants shifted from borderline deficiency to deficient Mn2+ exhibited a major increase in IAAO activity, reduction in growth and extensive leaf abscission. Control and borderline toxicity plants maintained normal IAAO activity, growth, and appearance. During a final 2-week period, symptom expression was intensified. In particular, the initial borderline deficiency plants shifted to deficient levels of Mn2+ abscised most of those leaves that expanded after the shift in treatment. In addition, shifts of some plants to toxic Mn2+ levels during the third phase of the experiment produced a complete cycle of manipulation. Plants initially deficient in Mn2+ with high IAAO and low growth recovered growth and declined in IAAO when shifted to control Mn2+ and then suffered severe inhibition of growth and toxicity symptoms when shifted to high Mn2+.In all cases changes in enzyme activity, growth, leaf abscission and similar symptoms were most strongly expressed in the youngest tissue or that with the greatest potential for growth during the interval of a particular treatment. Since total growth, IAAO, leaf abscission, internode length and similar symptoms were consistently manipulated in both directions (increase or decrease in intensity or degree) by raising or lowering Mn2+ levels in the plant culture medium, we conclude that there is a causal relationship between IAAO and these responses that involves destruction of auxin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1976.tb03949.x
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  • 5
    Electronic Resource
    Electronic Resource
    Gibberellic acid and indole acetic acid compete in ethylene promoted abscission (1976)
    Springer
    Planta 129 (1976), S. 275-276 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Abscission of cotton cotyledonary explant petioles is promoted by gibberellic acid (GA) in room air and, to a lesser extent, in 1 μl ethylene liter-1 air. GA3 consistently reduced the abscission-retarding effect of indole-acetic acid (IAA) (promoted abscission in the presence of IAA), and exogenous ethylene further promoted abscission. It is proposed that GA's promotion of ethylene-induced abscission is achieved by reducing the abscission retarding action of auxin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00398272
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  • 6
    Electronic Resource
    Electronic Resource
    Opening of the hypocotyl hook in seedlings as influenced by light and adjacent tissues (1980)
    Springer
    Planta 148 (1980), S. 188-191 
    Details
    ISSN: 1432-2048
    Keywords: Cotyledons ; Hypocotyl hook ; Light (hook opening) ; Root
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The influence of the cotyledons and apical bud and the root system on the light-induced opening of the hypocotyl hook of etiolated seedlings of Gossypium hirsutum L., Phaseolus vulgaris L., Helianthus annuus L., Ipomoea alla L., Ipomoea sp., Cucumis sativus L., Linum usitatissimum L., Hibiscus esculentus L., and Raphanus sativus L. was studied. Light stimulated the opening of hypocotyl hook in all cases, but the cotyledons and roots had different effects in different plants. Generally, the presence of cotyledons and the remainder of the shoot apical to the hook inhibited light-mediated opening, but in Gossypium the organs stimulated light-mediated opening. Presence of roots either promoted opening, had no effect, or had an effect only when the cotyledons were present. In the dark the adjacent organs had a reduced effect over that shown in the light, but one cultivar of cotton, Acala SJ1, opened the hook in the dark without cotyledons as much as under any condition in the light. The variation between species in hook opening may related to the need of that process for a proper hormonal balance, as affected by light, which must be obtained from adjacent tissues.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00386421
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  • 7
    Electronic Resource
    Electronic Resource
    Floral initiation in sorghum hastened by gibberellic acid and far-red light (1979)
    Springer
    Planta 145 (1979), S. 269-272 
    Details
    ISSN: 1432-2048
    Keywords: Flowering ; Gibberellin ; Photoperiodism ; Phytochrome ; Sorghum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Combinations of far-red light (FR) (4 min) and gibberellic acid (GA3), given at the beginning of a daily 12-h dark period in a growth room, were used to study floral induction in four maturity genotypes of the milo group of sorghum (Sorghum bicolor (L.) Moench). The 12-h dark period without GA3 application or FR induced flowering in only the early genotype; FR hastened initiation in the early genotype, while GA3 hastened floral initiation in the two intermidiate-flowering genotypes. GA3 and FR together had a strong synergistic effect, hastening floral initiation by 30 to more than 80 d in the early and intermediate genotypes. Red light (R) did not hasten flowering; FR preceded by R gave the same effect as FR alone. GA3 promoted stem elongation equally whether floral initiation occurred or not; thus, its effect on stem elongation was independent of floral initiation. The capacity of GA3 to induce flowering in sorghum, a short-day plant, seems to be enhanced by phytochrome being in the PR form at the beginning of the night when GA3 was applied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00454451
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  • 8
    Electronic Resource
    Electronic Resource
    Location of ethylene production in cotton flowers and dehiscing fruits (1973)
    Springer
    Planta 115 (1973), S. 93-96 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Over half of the ethylene produced by 1-day-old cotton flowers came from the combined stigma, style, and stamens. These tissues produced 0.0050 μl/flower·h compared to 0.0024 and 0.0010 μl/flower·h produced by the petals and ovary, respectively. Walls of dehiscing cotton fruits produced 0.052 μl ethylene/fruit·h. This was approximately 50% more than seeds plus fiber which produced 0.033 μl/fruit·h.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388610
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  • 9
    Electronic Resource
    Electronic Resource
    Morphactins enhance ethylene-induced leaf abscission (1973)
    Springer
    Planta 110 (1973), S. 91-93 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Morphactins were found to resemble other auxin-transport inhibitors in their ability to stimulate leaf abscission in cotton in response to ethylene or Ethephon (2-chloroethylphosphonic acid).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00386928
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  • 10
    Electronic Resource
    Electronic Resource
    Nitrogen fertility and leaf age effect on ethylene production of cotton in a controlled environment (1997)
    Springer
    Plant growth regulation 22 (1997), S. 23-28 
    Details
    ISSN: 1573-5087
    Keywords: ethylene ; Gossypium hirsutum ; leaf age ; nitrogen fertility ; nutrient deficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The effect of nitrogen (N) fertility and its subsequent impact on ethylene production varies with plant species. Additionally, ethylene production reportedly increases or decreases with leaf age for several species. We examined leaf age and N fertility effects on ethylene production of cotton (Gossypium hirsutum L.) during the early vegetative stages of development (14 to 42 days after emergence) in a controlled environment. Ethylene production was determined by sampling leaf discs from the topmost fully expanded, middle, and bottom leaves of the canopy at 14, 21, 28, 35, and 42 days after emergence. Ethylene was collected from leaf discs in sealed test tubes and quantified by gas chromatography. Early in development, a N deficiency was associated with elevated levels of ethylene, suggesting stress ethylene production was occurring in response to a N-deficiency stress. As plant development progressed, however, increased ethylene production was associated with higher levels of applied N. Additionally, higher ethylene production was linearly associated with higher chlorophyll levels in all three leaves sampled. Ethylene production within plants receiving any given rate of N initially increased and then decreased with leaf age. The dynamics of this relationship suggest that as the N status of the plant changes during plant development, the relative rate of ethylene production, with regard to leaf age, is significantly influenced.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005854625641
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