scholarly journals Studies on the Breaking of Dormancy in Barnyardgrass Seed : III. Change of the dormancy-breaking effect of various compounds concerning with oxidation-reduction system by dormancy stage

1972 ◽  
Vol 41 (4) ◽  
pp. 488-495 ◽  
Author(s):  
Norihiro SHIMIZU ◽  
Kunikazu UEKI
Keyword(s):  
Dormancy Breaking ◽  
Breaking Effect ◽  
Reduction System ◽  
Oxidation Reduction

scholarly journals p-HYDROQUINONE AND p-BENZOQUINONE AS HISTOCHEMICAL REAGENTS I. A NEW TETRAZOLIUM METHOD FOR AMINO GROUPS, AND THE MECHANISM OF FORMAZAN STAINING OF PARAFFIN AND FRESH FROZEN SECTIONS

1967 ◽  
Vol 15 (7) ◽  
pp. 404-408 ◽  
Author(s):  
G. G. CARMICHAEL ◽  
STEPHANIE T. K. MANDER
Keyword(s):  
Electron Acceptor ◽  
Thermal Shrinkage ◽  
Frozen Sections ◽  
Amino Groups ◽  
Paraffin Sections ◽  
Tetrazolium Bromide ◽  
Acid Ph ◽  
Reduction System ◽  
Oxidation Reduction ◽  
Fresh Frozen

The staining of amino groups by formazan when dehydrated paraffin sections are incubated in a mixture of hydroquinone and 3-(4,5-dimethyl thiazolyl-2)-2 ,5-diphenyl-2H-tetrazolium bromide at an acid pH is reported. The mechanism of this reaction and of the cytoplasmic deposition of formazan in fresh frozen sections incubated under similar conditions is investigated. It is shown that the oxidation of hydroquinone to semiquinone is responsible for the reaction, the tetrazole acting as electron acceptor. The tissue amino groups, exposed by dehydration and thermal shrinkage, and the nitrogen groupings of phosphobipid behave as "catalysts." The relevant properties of the hydroquinone-benzoquinone oxidation-reduction system are described, and the reactions between benzoquinone and tissue constituents are reviewed.

H2O2 is involved in the dormancy-breaking effect of hydrogen cyanamide in grapevine buds

2008 ◽  
Vol 55 (2) ◽  
pp. 149-155 ◽  
Author(s):  
Francisco J. Pérez ◽  
Ricardo Vergara ◽  
Sebastián Rubio
Keyword(s):  
Dormancy Breaking ◽  
Breaking Effect ◽  
Hydrogen Cyanamide ◽  
Grapevine Buds

Ascorbic-Dehydroascorbic Acid as an Oxidation-Reduction System*

1955 ◽  
Vol 40 (5) ◽  
pp. 224-236 ◽  
Author(s):  
Bernard Schwartz ◽  
P.J. Leinfelder
Keyword(s):  
Dehydroascorbic Acid ◽  
Reduction System ◽  
Oxidation Reduction
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