Effect of Gamma Radiation on Rate of Ethylene and Carbon Dioxide Evolution by Lemon Fruit

Maxie, E.C.; Eaks, Irving L.; Sommer, N. F.; Rae, Henry L.; El-Batal, Salah

doi:10.1104/pp.40.3.407

Cited by 49 publications

(23 citation statements)

References 4 publications

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“…This is consistent with the reported responses of other plant materials, particularly of fruit tissues, to ionizing radiation (2,16,17,21,26).…”

Section: Resultssupporting

confidence: 81%

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Abscission of Phaseolus and Impatiens Explants

Dwelle

1975

Plant Physiol.

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“…This is consistent with the reported responses of other plant materials, particularly of fruit tissues, to ionizing radiation (2,16,17,21,26).…”

Section: Resultssupporting

confidence: 81%

“…Low doses apparently inhibit auxin synthesis while larger doses can destroy auxin activities directly (5,11,23). As with other wound responses, irradiated tissues often display production of endogenous ethylene (16,17,21,26).…”

mentioning

confidence: 99%

Abscission of Phaseolus and Impatiens Explants

Dwelle

1975

Plant Physiol.

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“…In some cases the increase in PAL activity was shown to be due to de novo synthesis of the enzyme (7,14,20,23,24). The observation that irradiated (11), stressed (19), wounded (9,12), or infected plants (9,18,21) produce more ethylene suggests that ethylene mav play a role in increased PAL activity. This idea is also supported by reports that ethylene can regulate protein synthesis (1) and PAL activity in sweet potato roots (10).…”

mentioning

confidence: 99%

Ethylene-controlled Induction of Phenylalanine Ammonia-lyase in Citrus Fruit Peel

Riov¹,

Monselise²,

Kahan³

1969

Plant Physiol.

117

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Abstract. L-Phenylalanine ammonia-lyase (PAL) activity is low in the external layers (flavedo) of intact mature grapefruit peel. Flavedo discs evince upon incubation increasing PAL activity and ethylene production. Light has no effect in enhancing PAL activity in discs. Exogenous ethylene stimulates PAL activity in the flavedo of intact mature grapefruits (half maximum stimulation at 15 ppm); such activity rapidly decreases when fruit is removed from the ethylene oontaining atmosphere. Carbon dioxide inhibits both ethylene production and PAL activity of discs; exogenous ethylene only partly relieves PAL inhibition. Cycloheximide inhibits both PAL activity and ethylene production by flavedo discs. The same concentration of cycloheximide also inhibits PAL activity of discs in the presence of exogenous ethylene. Protein synthesis seems therefore to be needed at both levels of ethylene evolution and enhancement of PAL activity.

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“…The gases were extracted from the fruits by the vacuum method described by Maxie et al (38). Their concentrations were determined by gas chromatography (31,38). …”

mentioning

confidence: 99%

Growth and Respiratory Response of Fig (Ficus carica L. cv. Mission) Fruits to Ethylene

Marei

Crane

1971

Plant Physiol.

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Maxie and Crane (37) pointed out that "Before CMH can be established as a growth regulator in figs, it must be verified that production of the gas is correlated with the onset of renewed growth (Period III)." Evidence indicating the existence of such a correlation is presented here. MATERIALS AND METHODSCurves of growth in diameter were developed for both firstand second-crop fruits and were used for reference in timing of ethylene treatment and in fruit sampling. Diameters of 10 basal-most fruits on each of five 10-year-old trees were measured periodically with a vernier caliper. Sampling of treated fruits as well as controls was confined to the basalmost fruits. Average fresh and dry weights were determined by weighing triplicate five-fruit samples before and after drying at 60 C until weights remained constant.Ethylene (5 1ul/l in an air mixture) was applied to fruitbearing branches in the orchard. For this purpose, a 1900-liter tank was evaculated, a predetermined volume of ethylene gas was injected, and the tank was compressed to the appropriate pressure (about 110 kg/ cm2). Whole branches were enclosed in large polyethylene bags provided with an inlet and an outlet, and ethylene was introduced into them through Tygon tubing at the rate of 100 ml/min, as regulated by a flow meter (8). Other branches that were similarly treated with compressed air served as controls.Rate of respiration at different stages of fruit development was monitored using triplicate fruit samples, each consisting of 200 to 300 g. The samples were placed in 4-liter glass jars, the lids of which were tight and provided with two glass tubes that served as inlets and outlets. Respiration rate, measured as mg C02/kg fruit hr, was determined by the colorimetric method of Claypool and Keefer (8). The fruits were kept at 20 C, and the first measurement was made 24 hr after harvest, followed by daily measurement for the following 6 days.Changes were monitored in the concentration of endogenous C2H4, CO2, and 02 in the internal atmosphere of the fruits during development and following treatment. The gases were extracted from the fruits by the vacuum method described by Maxie et al. (38). Their concentrations were determined by gas chromatography (31,38).

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Effect of Gamma Radiation on Rate of Ethylene and Carbon Dioxide Evolution by Lemon Fruit

Cited by 49 publications

References 4 publications

Abscission of Phaseolus and Impatiens Explants

Abscission of Phaseolus and Impatiens Explants

Ethylene-controlled Induction of Phenylalanine Ammonia-lyase in Citrus Fruit Peel

Growth and Respiratory Response of Fig (Ficus carica L. cv. Mission) Fruits to Ethylene

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