Comparative study of four rice cultivars with different levels of cadmium tolerance

Xiao, Wang; Zhang, Zhongwei; Tu, Shuangshuang; Feng, Wei; Xu, Fengming; Zhu, Fei; Zhang, Dawei; Du, Junbo; Yuan, Shu; Lin, Honghui

doi:10.2478/s11756-012-0125-7

Cited by 31 publications

(11 citation statements)

References 40 publications

(56 reference statements)

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“…Fe is an integral cofactor of antioxidant enzymes such as catalase and ascorbate peroxidase (Sharma et al 2004). As such, the maintenance of high levels of Fe in the roots when Cd concentrations were highest can increase the activity of these enzymes, and would be an important defense mechanism against ROS generated by Cd-stress (Wang et al 2013). Our data suggests that Cd did not affect Fe uptake by P. glomerata roots, and that the differences seen in shoot Fe contents could be explained by Cd interference in the translocation of this micronutrients to the shoots (as was reported by Sandalio et al 2001).…”

Section: Micronutrient Contentssupporting

confidence: 49%

Cadmium effects on mineral nutrition of the Cd-hyperaccumulator Pfaffia glomerata

2013

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A plant's ability to survive in a stressful environment is correlated with its nutritional status, which can be affected by cadmium (Cd) uptake. The present study evaluated the influence of Cd on the concentrations and distributions of nutrients in the roots and shoots of the Cd-hyperaccumulator Pfaffia glomerata (Sprengel) Pedersen. Plantlets were cultivated in nutrient solutions containing increasing Cd concentrations during 20 days under greenhouse conditions, and the concentrations of Cd and essential macro-(N, P, K, Ca, Mg and S) and micro-(Zn, Fe, Mn, Cu) elements in the roots and shoots were subsequently determined. Cd did not affect the plant biomass production. Cd accumulation was found to be higher in roots than in shoots, and influenced the distribution of macro and micro elements in those plants. Despite the high phytotoxicity of this element, our results indicated the existence of Cd-tolerance mechanisms in both nutrient uptake and distribution processes that enabled these plants to survive in Cd-contaminated sites.

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Section: Micronutrient Contentssupporting

confidence: 49%

Cadmium effects on mineral nutrition of the Cd-hyperaccumulator Pfaffia glomerata

2013

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“…Heavy metal stress including Al stress, induces proteins of 20 different functional classes and most of these include antioxidant defence elements. Further the change in abundance of proteins also depends on stress dose and duration 62,63 .…”

Section: Discussionmentioning

confidence: 99%

“…Os ALS1 is a half ABC transporter localized in vacuolar membranes and is responsible for sequestration of chelated Al in vacuoles 13 . Vacuolar sequestration forms an important and integral tolerance mechanism in rice 63 . ALS1 expression also showed significant changes on exposure to Al.…”

Section: Discussionmentioning

confidence: 99%

Redox balance, metabolic fingerprint and physiological characterization in contrasting North East Indian rice for Aluminum stress tolerance

Awasthi

Saha

Panigrahi

et al. 2019

Sci Rep

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Aluminum (Al) toxicity is a serious problem for rice crop productivity in acidic soils worldwide. The present work was conducted to look out for the alteration in ROS homeostasis; metabolic fingerprint; and morphology in two contrasting Indica rice cultivars of North East India (NE India) to Al toxicity. Al stress led to excess accumulation of ROS (H 2 O 2 and O 2 − ), and this in turn induced ROS mediated cellular damage, as indicated by lipid peroxidation both qualitatively as well as quantitatively. This excessive ROS production also led to significant reduction in chlorophyll content and stomatal conductance. This was followed by the loss of photosynthetic efficiency as detected by chlorophyll fluorescence. This excessive damage due to ROS prompted us to check the anti-oxidative machinery. Antioxidants, especially enzymes (SOD, APX, POX, GR, CAT, DHAR, MDHAR) are very important players in maintenance of ROS homeostasis. In tolerant variety Disang, higher activity of these enzymes and vice versa in sensitive variety, was observed in response to Al treatment. The non-enzymatic antioxidants (proline, ascorbate and glutathione) also showed similar trend. Though the tolerant variety showed strong anti-oxidative machinery, it was unable to completely nullify the stress experienced by the seedlings. Organic acids are also important players in detoxification of Al stress through efflux in the rhizosphere. In tolerant genotype, citrate exudate was found to be more when compared to sensitive genotypes on exposure to high dose of Al. This is supported by higher abundance of FRDL4, a citrate transporter. Not only FRDL4, other stakeholders for Al stress response like ART1 and ALS1 depicted prominent transcript abundance in the tolerant variety. In conclusion, through this study detailed physiological and metabolic characterisation of two contrasting Indica rice varieties Disang and Joymati, native to NE India for Al tolerance was performed for the very first time.

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“…As observed in peas, Cd affects both the photosystems over a long period of stress (Chugh and Sawhney 1999 ). However, during initial stages Cd had more pronounced effect on the activity of PSII as observed in Thalspi caerulescence (Kupper et al 2007 ) stating higher sensitivity of PSII to Cd toxicity (Wang et al 2013 ).…”

Section: Reviewmentioning

confidence: 99%

Structural and functional alterations in photosynthetic apparatus of plants under cadmium stress

2013

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Cadmium is a potentially toxic heavy metal that hampers plant productivity by interfering with their photochemistry. Cd causes disturbances in a range of physiological processes of plants such as photosynthesis, water relations, ion metabolism and mineral uptake. Cd pronouncedly affects photosynthesis by alteration of its vital machinery in all aspects. Photosynthesis is a well organised and sequential process fundamental to all green plants and microorganisms which involves various components, including photosynthetic pigments and photosystems, the electron transport system and CO2 reduction pathways. Any damage at any level caused by Cd, critically affects overall photosynthetic capacity. Present review focuses on key effects of Cd on photosynthetic apparatus including chloroplast structure, photosynthetic pigments, Chl-protein complexes and photosystems resulting in overall decrease in efficiency of carbon assimilation pathway.Electronic supplementary materialThe online version of this article (doi:10.1186/1999-3110-54-45) contains supplementary material, which is available to authorized users.

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Comparative study of four rice cultivars with different levels of cadmium tolerance

Cited by 31 publications

References 40 publications

Cadmium effects on mineral nutrition of the Cd-hyperaccumulator Pfaffia glomerata

Cadmium effects on mineral nutrition of the Cd-hyperaccumulator Pfaffia glomerata

Redox balance, metabolic fingerprint and physiological characterization in contrasting North East Indian rice for Aluminum stress tolerance

Structural and functional alterations in photosynthetic apparatus of plants under cadmium stress

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