Alterations in polyphenol oxidase activity during organ redifferentiation in carrot calluses cultured in vitro

2015 ◽  
Vol 31 (1–2) ◽  
pp. 41-46
Author(s):  
Nityananda Chakraborty ◽  
Balen Nandi

Peroxidase and polyphenol oxidase activities in fruits of two cultivars of banana, 'champa' and 'kanthali' rotted by <i>Botryodiplodia theobromae</i> Pat. was studied. The enzymes showed much higher activities in infected than that in uninfected 'tissues. Increase in peroxidase activity was evidently inhibited by cycloheximide. Polyphenol oxidase activity was also inhibited in presence of phenylthiourea and Na-diethyldithiocarbamate more strongly by the former. Increase in activities seemed to be due to increased sytheses of the enzymes. In an <i>in vitro</i> culture, the fungus exhibited some peroxidase but no polyphenoloxidase activity.


1997 ◽  
Vol 34 (2) ◽  
pp. 155-159 ◽  
Author(s):  
Antonio Rescigno ◽  
Francesca Sollai ◽  
Andrea C Rinaldi ◽  
Giulia Soddu ◽  
Enrico Sanjust

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