NDLI: Glucose-6-Phosphate Dehydrogenase/6-Phosphogluconate Dehydrogenase Ratio and the Glucose-6-Phosphate, 6-Phosphogluconate and Fructose-6-Phosphate Contents in Tobacco Plants Infected with Potato Virus Y

Content Provider	Springer Nature Link
Author	Šindelář, L. Šindelářová, M.
Copyright Year	2002
Abstract	The ratio of activities of glucose-6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase (G6P DH/6PG DH), and the contents of glucose-6-phosphate (G6P), 6-phosphogluconate (6PG) and fructose-6-phosphate (F6P) were studied at various stages of potato virus Y (PVY) multiplication in Nicotiana tabacum cv. Samsun. G6P DH/6PG DH increased through the experiment from 0.42 to 0.53 in leaves of healthy tobacco, and up to 0.59 in PVY systemically infected leaves. However, these ratios in the ruptured protoplast preparations, and the chloroplast and cytosol fractions of healthy protoplasts were similar to that from infected ones. The ratio lower than 1, found in the healthy and/or PVY- infected leaf tissues and in the infected protoplasts as well, confirms the assumption that G6P DH is the control enzyme of oxidative pentosephosphate pathway not only in the healthy but also in the infected plants. The contents of G6P, 6PG and F6P in the period of the highest PVY multiplication were strongly decreased (to 30 – 50 % when compared with control healthy leaves) and were negatively correlated with the G6P DH and 6PG DH activities.
Starting Page	575
Ending Page	580
Page Count	6
File Format	PDF
ISSN	00063134
Journal	Biologia Plantarum
Volume Number	45
Issue Number	4
e-ISSN	15738264
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2002-01-01
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Plant Science Horticulture

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