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Induction of non-protein thiols and phytochelatins by cadmium in Eichhornia crassipes

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Title Induction of non-protein thiols and phytochelatins by cadmium in Eichhornia crassipes
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Creator Rama Pala
Ravinder Kaur
, Deepika Rajwar
Jai Prakash Narayan Raid
 
Subject Cadmium (Cd); cysteine; gluathione (GSH); Eichhornia crassipes; heavy metals; non-protein thiols (NP-SH); phytochelatins (PCs)
 
Description Not Available
Impact of root Cd concentration on production of cysteine, non-protein thiols (NP-SH), glutathione
(GSH), reduced glutathione (GSSG), and phytochelatins (PCs) in Eichhornia crassipes exposed to different
dilutions of brass and electroplating industry effluent (25%, 50%, and 75%), and synthetic
metal solutions of Cd alone (1, 2.5, and 3.5 ppm) and with Cr (1ppm Cd þ 1ppm Cr, 2.5ppm Cd
þ 3ppm Cr, and 3.5ppm Cd þ 4ppm Cr) was assessed in a 45 days study. Different treatments
were used to understand and compare differential antioxidant defense response of plant under
practical drainage (effluent) and experimental synthetic solutions. The production of NP-SH and
cysteine was maximum under 2.5ppm Cd þ 3ppm Cr treatments i.e., 1.78 mmol/g fw and
288nmol/g fw, respectively. The content of GSH declined whereas that of GSSG increased progressively
with exposure duration in all treatments. HPLC chromatograms revealed that the concentrations
of PC2, PC3, and PC4 (248, 250, and 288nmol-SH equiv.g_1 fw, respectively) were maximum
under 1ppm Cd, 1ppm Cd þ 1ppm Cr, and 2.5ppm Cd þ 3ppm Cr treatments, respectively.
PC2, PC3, and PC4 concentrations increased with Cd accumulation in the range 812–1354 mg/g dry
wt, 1354–2032 mg/g dry wt and 2032–3200 mg/g dry wt, respectively. Thus, the study establishes a
direct proportionality relationship between concentration/length of phytochelatins and root Cd
concentrations, upto threshold limits, in E. crassipes.
Not Available
 
Date 2020-07-28T10:07:20Z
2020-07-28T10:07:20Z
2019-01-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/38341
 
Language English
 
Relation Not Available;
 
Publisher Not Available