Induction of Phytochelatins in Hydrilla verticillata (l.f.) Royle under Cadmium Stress

Tripathi, Rudra Deo; N., U.; Gupta, Manisha; Prakāsh, Chandra

doi:10.1007/s001289900073

Cited by 42 publications

(14 citation statements)

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“…Increase in PCs levels in Brassica juncea could be due to activation of PCs gene (Heiss et al 2003). Similar to the present finding, synthesis of PCs during heavy metal stress has been reported earlier in Bacopa monnieri on exposure to Cd (Mishra et al 2006), on exposure to Pb, Cd and Hg in Hydrilla and Vallisneria (Tripathi et al 1996;Gupta et al 1999) and in alga, Stichococcus bacillaris, exposed to Pb (Pawlik-Skowronska 2002). Formation of Cd-PCs complexes reduces free Cd concentration in the cytoplasm and contributes to suppress the activation of stress-related responses in plant metabolism.…”

Section: Discussionsupporting

confidence: 92%

Antioxidant defense system in leaves of Indian mustard (Brassica juncea) and rape (Brassica napus) under cadmium stress

et al. 2008

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Plant species capable of hyper-accumulating heavy metals are of considerable interest for phytoremediation, and differ in their ability to accumulate metals from environment. Using two brassica species (Brassica juncea and Brassica napus), nutrient solution experiments were conducted to study variation in tolerance to cadmium (Cd) toxicity based on (1) lipid peroxidation and (2) changes in antioxidative defense system in leaves of both plants (i.e., superoxide dismutase (SOD EC 1.15.1.1), catalase (CAT EC 1.11.1.6), ascorbate peroxidase (APX EC 1.11.1.11), guaiacol peroxidase (GPX EC 1.11.1.7), glutathione reductase (GR EC 1.6.4.2), levels of phytochelatins (PCs), non-protein thiols (NP-SH), and glutathione. Plants were grown in nutrient solution under controlled environmental conditions, and subjected to increasing concentrations of Cd (0, 10, 25 and 50 lM) for 15 days. Results showed marked differences between both species. Brassica napus under Cd stress exhibited increased level of lipid peroxidation, as was evidenced by the increased malondialdehyde (MDA) content in leaves. However, in Brassica juncea treated plants, MDA content remained unchanged. In Brassica napus, with the exception of GPX, activity levels of some antioxidant enzymes involved in detoxification of reactive oxygen species (ROS), including SOD, CAT, GR, and APX, decreased drastically at high Cd concentrations. By contrast, in leaves of Brassica juncea treated plants, there was either only slight or no change in the activities of the antioxidative enzymes. Analysis of the profile of anionic isoenzymes of GPX revealed qualitative changes occurring during Cd exposure for both species. Moreover, levels of NP-SH and PCs, monitored as metal detoxifying responses, were much increased in leaves of Brassica juncea by increasing Cd supply, but did not change in Brassica napus. These results indicate that Brassica juncea plants possess the greater potential for Cd accumulation and tolerance than Brassica napus.

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Section: Discussionsupporting

confidence: 92%

Antioxidant defense system in leaves of Indian mustard (Brassica juncea) and rape (Brassica napus) under cadmium stress

et al. 2008

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“…Potential of aquatic plants for phytoremediation purposes is well recognized today [16,37,38]. Some aquatic plants including Hydrilla, Ceratophyllum and Eichhornia have been extensively studied by various authors and have been found to accumulate high levels of almost all the heavy metals investigated so far [17,19,20,[39][40][41][42]. Various other studies demonstrate wastewater treatment and phytoremediation potential of plants like Ipomoea and Marsilia [43,44].…”

Section: Resultsmentioning

confidence: 96%

Screening of native plants and algae growing on fly-ash affected areas near National Thermal Power Corporation, Tanda, Uttar Pradesh, India for accumulation of toxic heavy metals

Dwivedi

Srivastava

Mishra

et al. 2008

Journal of Hazardous Materials

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“…As GSH is a substrate for PCs synthesis, it might be hypothesis that GSH depletion would occur because of PCs synthesis in response to heavy meals. For example, a decline of GSH level is concomitant with the synthesis of PCs, which has been demonstrated in response to heavy metals [36]. Despite the increased synthesis of phytochelatins, GSH was constant in two phytoplankton species over the studied Cd range [37].…”

Section: Discussionmentioning

confidence: 97%

Physiological and biochemical responses in the leaves of two mangrove plant seedlings (Kandelia candel and Bruguiera gymnorrhiza) exposed to multiple heavy metals

Huang

Wang

2010

Journal of Hazardous Materials

114

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Induction of Phytochelatins in Hydrilla verticillata (l.f.) Royle under Cadmium Stress

Cited by 42 publications

References 2 publications

Antioxidant defense system in leaves of Indian mustard (Brassica juncea) and rape (Brassica napus) under cadmium stress

Antioxidant defense system in leaves of Indian mustard (Brassica juncea) and rape (Brassica napus) under cadmium stress

Screening of native plants and algae growing on fly-ash affected areas near National Thermal Power Corporation, Tanda, Uttar Pradesh, India for accumulation of toxic heavy metals

Physiological and biochemical responses in the leaves of two mangrove plant seedlings (Kandelia candel and Bruguiera gymnorrhiza) exposed to multiple heavy metals

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