Measurement of Small Concentrations of Ethylene and Automobile Exhaust Gases and Their Relation to Lemon Storage

Rohrbaugh, P. W.

doi:10.1104/pp.18.1.79

Cited by 12 publications

(6 citation statements)

References 10 publications

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“…That the response of the pea epicotyl varies with the concentration of ethylene, giving well-defined qualitative and quantitative responses at different levels, was shown by NELJUBOW (13). ROHRBAUGH (18) has shown that the etiolated Alaska pea responds to as little as 0.05 parts per million of ethylene in air, and this has been confirmed by work in progress in this laboratory. Accordingly, young etiolated pea seedlings of this variety were chosen as test plants for the present study; uniform lots can be produced easily at any time, and their sensitivity is about equal to potato or tomato leaf epinasty.…”

Section: Introductionsupporting

confidence: 49%

“…In all cases which subsequently have been investigated chemically, the active substanee has been shown to be ethylene. This is niow so well established and generally accepted that demonstration of the activity of an emanation by any of the above methods, is a very strong indication that ethylene is among the gases evolved [ (18,19,20,21) and review by BIALE and SHEPHERD (4) ].…”

Section: Introductionmentioning

confidence: 99%

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Relation of the Production of an Active Emanation to Respiration in the Avocado Fruit

Pratt

Biale

1944

Plant Physiol.

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Section: Introductionsupporting

confidence: 49%

Section: Introductionmentioning

confidence: 99%

Relation of the Production of an Active Emanation to Respiration in the Avocado Fruit

Pratt

Biale

1944

Plant Physiol.

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“…Accordingly, the internal concentration of ethylene in the pea subapex can be estimated to be around 20 to 30 nl/l, or very close to the threshold producing the triple response in this tissue (20). Actually the threshold required to affect the growth of this tissue may be determined by the fact that the tissue already contains this concentration of ethylene, so that an equivalent amount must be applied to produce an endogenous change in ethylene content sufficiently large to influence cellular expansion, a process dependent upon the log of the ethylene concentration.…”

Section: Discussionmentioning

confidence: 99%

Relation of Phytochrome-enhanced Geotropic Sensitivity to Ethylene Production

Kang

Burg

1972

Plant Physiol.

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Brief exposure of etiolated pea (Pisum sativum cv. Alaska) seedlings to red light enhances subsequent development of geotropic curvature of the stem. Both this response and inhibition of ethylene production by red light become maximal 8 hours after illumination. Very low concentrations of applied ethylene inhibit development of geotropic curvature, whereas hypobaric treatment enhances geotropic sensitivity by removing endogenous ethylene. Increased geotropic sensitivity after illumination is accompanied by increased lateral migration of 'H-indoleacetic acid in response to gravity, and ethylene inhibits this lateral migration. It is suggested, therefore, that red light-enhanced geotropic sensitivity is caused by increased lateral auxin transport resulting from a reduction in ethylene production after illumination.Several instances are known in which ethylene intervenes (6,12, 13, 15,16) MATERIALS AND METHODS Plant Material. Seeds of Pisum sativum cv. Alaska were soaked for 3 hr, germinated in 12.5-cm plastic pots containing wet vermiculite, and grown in darkness at 23 C for 7 days. In most experiments, 1-cm subapical sections from the third internode were used, but in some cases the entire apical part and third internode were excised by cutting the stem about 1 cm below the second node. Plants were handled under dim green light, and in some cases illuminated for 5 min with red light (1250 erg/cm2 sec) from a fluorescent source (13) at various times before the tissue was cut.Geotropic Induction. Geotropic curvature was induced in isolated 1-cm sections by floating 10 of them without shaking 1This work was supported by National Science Foundation Grant GB-27424 to S.P.B. on 20 ml of solution (2% sucrose, 5 /-M CoCl2 and 5 mm potassium phosphate buffer, pH 6.8) contained in a 10-cm Petri dish. Hypobaric experiments were performed with intact apical parts laid horizontally on a Lucite mount having 10 grooves. The basal cut ends were kept moist with wet paper towel, the Lucite mounts placed in 10-liter capacity desiccators, and hypobaric conditions established at 120 mm Hg of water-saturated flowing 02 as described previously (13). Attempts to displace ethylene with a competitive inhibitor, CO2., were abandoned when it was found that 5 to 10% CO2 markedly inhibits stem growth, in contrast to hypobaric treatment (1), which does not affect the growth rate of the subapex. Curvatures were measured with a goniometer from shadowgraphs, and results presented as the average of 10 measurements with standard error.Lateral Transport of 3H-IAA. Ten 1-cm sections were placed horizontally on grooves of a Lucite mount, and a donor agar block (1.5%) containing 0.12 fLM [5-3H] IAA (17 c/mmole) was attached to the apical cut ends of the sections. A receiver agar block (1.5%) was attached to the basal cut surfaces. The Lucite mount was placed in a desiccator containing H20-saturated air, and after 120 min the agar blocks were removed, the apical 1 mm of each section excised, and the remaining part split longitudinally with a r...

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“…GANE (1935) states that the banana is particularly sensitive to ethylene, one part per million of air immediately inducing the climacteric (at 15° 0.). It is thus essential to take all possible steps to keep bananas which are beginning to ripen out of the cargo (RIDLEY 1923), and also to ensure that no ethylene can enter the hold containing the bananas, from any other part of the ship. Figures have already been given of the rate of production of ethylene by apples, and sufficient data are available to show that these rates of production are relatively high.…”

Section: /(Onfrol/ementioning

confidence: 99%

Einflüsse äußerer Faktoren auf die Atmung

Stiles¹,

Ullrich²,

Hüber³

et al. 1960

Plant Respiration Inclusive Fermentations and Acid Metabolism / Pflanzenatmung Einschliesslich Gärungen Und Säurestoffwechsel

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physodes wäh• rend des Austrocknens in Abhängigkeit von der Dauer der vorausgegangenen Befeuchtung. A 17'/2 Std; B 22 min lang befeuchtet. (Nach ENSGRABER 1955.) Abb. 4. Beziehungen zwischen CO,-Ausscheidung und Wassergehalt bei Mnium undulatum. (Nach Werten von JOENSSON 1894.) ENSGRABER 1955). Die Verhältnisse liegen aber insofern komplizierter, als die Atmungsintensität bei den höchsten Quellungsgraden erniedrigt ist; die An-

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Measurement of Small Concentrations of Ethylene and Automobile Exhaust Gases and Their Relation to Lemon Storage

Cited by 12 publications

References 10 publications

Relation of the Production of an Active Emanation to Respiration in the Avocado Fruit

Relation of the Production of an Active Emanation to Respiration in the Avocado Fruit

Relation of Phytochrome-enhanced Geotropic Sensitivity to Ethylene Production

Einflüsse äußerer Faktoren auf die Atmung

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