Tolerance and co‐tolerance of the grass <i>Chloris barbata</i> Sw. to mercury, cadmium and zinc

Patra, Jita; Lenka, Maheswar; Panda, Brahma B.

doi:10.1111/j.1469-8137.1994.tb03999.x

Cited by 50 publications

(27 citation statements)

References 40 publications

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“…These data clearly demonstrate the significant difference between Al-tolerant and Al-sensitive barley cultivars. Similar results were described by Patra et al (1994) where stronger activation of acid phosphatase was observed in tolerant grass than in non-tolerant during mercury and cadmium treatment. Phosphatase isoenzyme pattern always contain different numbers of isoenzymes.…”

Section: Resultssupporting

confidence: 78%

Aluminium induced acid phosphatase activity in roots of Al-sensitive and Al-tolerant barley varieties

Huttová¹,

Tamás²,

Mistrı́k³

2002

PLANT SOIL ENVIRON

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In barley roots significant increase of acid phosphatase activity was observed during Al treatment. Especially steep increase was found in the roots of Al-sensitive cv. Alfor treated with Al in the range of 1-10mM which was followed by sudden decline when higher concentration (10-100mM) was applied. Continual, but significantly lower increase in phosphatase activity was also demonstrated in the roots of Al-tolerant cv. Bavaria in the range of 1-50mM Al. In both cases, Al-induced increase of acid phosphatase activity was accompanied by the increase in the amount of one phosphatase isoforme. Contrary to cv. Alfor where Al-induced changes reached their maximum in the first day of Al treatment in the Al-tolerant cv. Bavaria slight increase continued also on the second day of Al treatment. Our results indicate that different behaviour of acid phosphatase enzyme in barley cultivars during Al stress may play an important function in coping by the plants with Al induced phosphate deficiency syndrome.

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Section: Resultssupporting

confidence: 78%

Aluminium induced acid phosphatase activity in roots of Al-sensitive and Al-tolerant barley varieties

Huttová¹,

Tamás²,

Mistrı́k³

2002

PLANT SOIL ENVIRON

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“…Protein carbonyls were determined in matrices and membranes of peroxisomes by measuring the complex formed with 2,4-dinitrophenylhydrazine (Levine et al 1991). Total-, protein-, and non-protein-thiols were measured as the complex formed with 5,5'-dithiobis(2-nitrobenzoic) acid (Patra et al 1994).…”

Section: Methodsmentioning

confidence: 99%

Role of peroxisomes in the oxidative injury induced by 2,4-dichlorophenoxyacetic acid in leaves of pea plants

McCarthy-Suárez¹,

Gómez²,

Rı́o³

et al. 2011

Biologia plant.

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The role of peroxisomes in the oxidative injury induced by the auxin herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) in leaves of pea (Pisum sativum L.) plants was studied. Applications of (2,4-D) on leaves or to root substrate increased the superoxide radical production in leaf peroxisomes. Foliar application also increased H 2 O 2 contents in leaf peroxisomes. Reactive oxygen species (ROS) overproduction was accompanied by oxidative stress, as shown by the changes in lipid peroxidation, protein carbonyls, total and protein thiols, and by the up-regulation of the activities of superoxide dismutase, ascorbate peroxidase, glutathione reductase, catalase, glucose 6-phosphate dehydrogenase and NADP + -dependent isocitrate dehydrogenase. Foliar or root 2,4-D applications also induced senescence symptoms in pea leaf peroxisomes, as shown by the decrease of protein content and glycolate oxidase and hydroxypyruvate reductase activities, and by the increase of endopeptidase, xanthine oxidase, isocitrate lyase and acyl-CoA oxidase activities as well as of 3-ketoacyl-CoA thiolase and thiol-protease protein contents. 2,4-D did not induce proliferation of pea leaf peroxisomes but induced senescence-like morphological changes in these organelles. Results suggest that peroxisomes might contribute to 2,4-D toxicity in pea leaves by overproducing cell-damaging ROS and by participating actively in 2,4-D-induced leaf senescence.

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“…We earlier reported regarding the evolution of metal-tolerance in the grass Chloris barbata Sw. growing at an abandoned solid-waste dump site near a chloralkali plant at Ganjam, India, which was highly contaminated with toxic levels of mercury (Lenka et al 1992, Patra et aL 1994. In this paper we present the difference in antioxidant and thiol responses of the aforesaid non-tolerant (NT) vis-fi-vis tolerant (T) clones of C. barbata to Cd-stress.…”

Section: Introductionmentioning

confidence: 96%

Differential antioxidant enzyme and thiol responses of tolerant and non-tolerant clones of Chloris barbata to cadmium-stress

et al. 2003

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Key words: a n t i o x i d a n t s , c a d m i u m , Chloris barbata, metal-tolerance, stress-response Abstract Tolerant and non-tolerant clones of Chloris barbara Sw. obtained, respectively, from an erstwhile mercury contaminated solid waste dump site near a chloralkali plant and a non-contaminated (control) site were subjected to cadmium-stress by growing the rooted cuttings in water containing CdSO4, 13 and 130 ~tM. Differences between the two clones in their response to cadmimn-stress were noted in root growth, and also with respect to certain biochemical parameters. Whereas catatase activity decreased and non protein-thiol levels increased in the non-tolerant clone, the level of protein-thiol alone increased significantly in the tolerant clone in response to cadmium--stress. No remarkable differences between the clones, however, were noted with respect to total soluble protein, peroxidase activity and lipid peroxidation. Remarkably the two clones responded differently to buthionine sulfoximine, an inhibitor of glutathione and/or phytochelatin synthesis, which inhibited root growth significantly in non-tolerant clone but not in the tolerant clone. Buthionine sulf~ximine, nonetheless, could potentate cadmium toxicity in either of the clones, but more effectively in the tolerant clone. The high sensitivity of tolerant-clone to the combined treatment of BSO and Cd in the present study could, therefore, be attributed to the cumulative oxidative stress generated synergistically by BSO and Cd.

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Tolerance and co‐tolerance of the grass Chloris barbata Sw. to mercury, cadmium and zinc

Cited by 50 publications

References 40 publications

Aluminium induced acid phosphatase activity in roots of Al-sensitive and Al-tolerant barley varieties

Aluminium induced acid phosphatase activity in roots of Al-sensitive and Al-tolerant barley varieties

Role of peroxisomes in the oxidative injury induced by 2,4-dichlorophenoxyacetic acid in leaves of pea plants

Differential antioxidant enzyme and thiol responses of tolerant and non-tolerant clones of Chloris barbata to cadmium-stress

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