Metabolic Reactions to Auxin I. The Effects of Auxin on Glutathione and the Effects of Glutathione on Growth of Isolated Plant Parts

Marrè, E.; Arrigoni, O.

doi:10.1111/j.1399-3054.1957.tb06951.x

Cited by 59 publications

(17 citation statements)

References 26 publications

(14 reference statements)

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“…As pointed out by Marre and Forti (24), the shift in the ATP-ADP ratio indicates first an increase in ATP as a result of activation of oxidative phosphorylation followed, in turn, by activation of endergonic processes. Marre et al (24,25) attribute this activation either to the effect of auxin on the oxidlation-reduction state of the ascorbic acid-glutathione system or to a direct interaction of auxin with the dehydrogenase enzymes. In view of the effects of 2.4-D on increasing the concentration of ascorbic acidl and soluble and protein sulfhydryl in soybean seedllings (17), such an activation of the respiratory svstem is conceivable.…”

Section: Resultsmentioning

confidence: 99%

Some effects of 2,4-dichlorophenoxyacetic acid on soluble nucleotides & nucleic acid of soybean seedlings

Key¹,

Hanson²

1961

Plant Physiol.

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Section: Resultsmentioning

confidence: 99%

Some effects of 2,4-dichlorophenoxyacetic acid on soluble nucleotides & nucleic acid of soybean seedlings

Key¹,

Hanson²

1961

Plant Physiol.

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“…6). The analyses of Marre and Forti (14) by simply making more total adenosine phosphates available, or by activating the respiratory enzyme system through its effect on the reduction of glutathione and ascorbic acid as suggested by Marre and Arrigoni (13).…”

Section: Morphological Effects Of 24-dmentioning

confidence: 99%

Effect of 2,4-Dichlorophenoxyacetic acid Application on Activity and Composition of Mitochondria from Soybeans

Key

Hanson²,

Bils³

1960

Plant Physiol.

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“…The resullts indicate that there is lno close relationship between the effeots of auixin oni growth and oni the redtuction state of the ascorbic aci(l anid sulfhydryl system!s (4,5,7,8,9,10). In the experiments reported here there was no effect of the Yptimuim concentration of auxin on the AA and DHA contents of excised soybean and cucumber hypocotyl, corn mesocotyl, and pea epicotyl.…”

Section: Discussionmentioning

confidence: 85%

“…There was a close correlation between the enhancement of cell elongationI by auxin and a shift of the ascorbic acid and gluitathione systems to a more reduced condition (8,9). Inhibition of growth by auxin correlated wvith a shift of the ascorbic acid sy-stem to a more oxidized state (9 …”

mentioning

confidence: 81%

Absence of a Causal Relationship between Auxin-Induced Growth and Changes in the Content of Ascorbic and Dehydroascorbic Acids in Excised Plant Tissues

Lin¹,

Key²

1967

Plant Physiol.

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Summniary. The data reported indicate that the oxidatioi-reductionl balance of the ascorbic acid system is not causally related to the atixin-regtulation of cell elongation. There was no shift in the ascorbic acid (AA) to dehydroascorb.c acid (DHA) ratio with growth-promoting concentration of aulxinl in several plant tissues. The AA to DHA ratio wvas experitmentally increased withouit altering the growth rate. Inhibition of growth by supra-optimal auxin was associated with a decrease in the AA to DHA ratio. Since the AA to DHA ratio was lowered by EDTA treatment without altering growth, it seems unlikely that the decrease in the AA to DHA ratio related to the inhibition of growth by high levels of auxiin. Materials and MethodsSoybean seeds (Hawkeye 63) and pea seed's (Alaska) were germinated as previously described for soybean (6). Cucumber seeds (Long Green) and corn seeds (WNF9X M14) were germinated in Kimpak as described for corn (3). Tissues used in subsequent experiments consisted of: sections o-f the 3-(lay old soybean hypocotyl excisedl from one-foutrth to 1 and one-foutrth cm below the cotyledons. 1-cm sections of the 3-day old corn mesocotyl excised one-fourth to 1 and one-fourth cm below the coleoptilar node; the apical 1-cm sectioIn of the 3-day old cucutmiber hypocotyl; a 1-cm section of the third internode of the 7-day old pea stem. All tissues were placed in a 1 % ice cold sucrose solution prior to beginning the experimental treat,men,ts. The inccubation medium consisted of 1 % sucrose, 5 m.i KH.PO4 neutralized to pH 6.0 wi,th NH,'OH, and 2,4-D as the pot,assium salit at pH 6.0 when used. Ascorbic acid (AA) and dehydroascorbic acid (DHA) soluttions were freshly prepared before each experiment. The DHA was prepared by charcoal oxidation of AA just prior to use. Two or 3-g samples of tissue were incubated in 10 ml of the medium at 30°with coInitIntOs shakiing. After iincubatioin the tissue was 742 www.plantphysiol.org on May 10, 2018 -Published by Downloaded from

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Metabolic Reactions to Auxin I. The Effects of Auxin on Glutathione and the Effects of Glutathione on Growth of Isolated Plant Parts

Cited by 59 publications

References 26 publications

Some effects of 2,4-dichlorophenoxyacetic acid on soluble nucleotides & nucleic acid of soybean seedlings

Some effects of 2,4-dichlorophenoxyacetic acid on soluble nucleotides & nucleic acid of soybean seedlings

Effect of 2,4-Dichlorophenoxyacetic acid Application on Activity and Composition of Mitochondria from Soybeans

Absence of a Causal Relationship between Auxin-Induced Growth and Changes in the Content of Ascorbic and Dehydroascorbic Acids in Excised Plant Tissues

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