NDLI: Induction of pumpkin glutathione S-transferases by different stresses and its possible mechanisms

Content Provider	Springer Nature Link
Author	Hossain, M. Z. Hossain, M. D. Fujita, M.
Copyright Year	2006
Abstract	Induction of pumpkin (Cucurbita maxima Duch.) glutathione S-transferases (GSTs) by different stresses and endogenous trans-2-hexenal content were determined in search of a common signal for GST induction. All of the stresses showed significant induction, As2O3 causing the highest induction followed by trans-2-hexenal. The trans-2-hexenal content was highest in trans-2-hexenal-treated seedlings and next-highest in methyl jasmonate-treated seedlings, whereas high temperature- and As2O3-treated seedlings had trans-2-hexenal contents lower than that of control seedlings. Induction of GST, lipoxygenase (LOX) and hydroperoxide lyase (HPL) was compared, since trans-2-hexenal and methyl jasmonate are the products of the LOX pathway. All four stresses showed weak LOX induction, high temperature causing the highest induction. However, only methyl jasmonate caused weak HPL induction. Both antioxidants or oxidants induced GST to different degrees. Glutathione contents of reduced glutathione (GSH) or oxidized glutathione (GSSG)-treated seedlings were significantly higher than the content of control seedlings, whereas those treated with other antioxidants or oxidants had contents similar to or less than control seedlings. The GSH:GSSG ratio was lowest in GSSG-treated seedlings and next-lowest in GSH-treated seedlings. The results of this study suggest that pumpkin GSTs are not induced through a common signalling pathway and that redox perturbation plays a role in pumpkin GST induction.
Starting Page	210
Ending Page	218
Page Count	9
File Format	PDF
ISSN	00063134
Journal	Biologia Plantarum
Volume Number	50
Issue Number	2
e-ISSN	15738264
Language	English
Publisher	Kluwer Academic Publishers-Consultants Bureau
Publisher Date	2006-01-01
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Plant Science Horticulture

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