Role of sulphur availability on cadmium-induced changes of nitrogen and sulphur metabolism in maize (Zea mays L.) leaves

Astolfi, Stefania; Zuchi, Sabrina; Passera, C.

doi:10.1016/j.jplph.2003.11.005

Cited by 77 publications

(34 citation statements)

References 29 publications

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“…In our earlier experiments it was shown that rice seedlings raised for 20 days in sand cultures containing 160 lM Al or 400 lM Ni accumulated substantial amounts of these metals in roots and shoots (Sharma and Dubey 2007;Maheshwari and Dubey 2009). Similar to our observations enhancement in aminating GDH activity was observed in maize leaves due to Cd (Astolfi et al 2004) and rice plants due to arsenic treatment (Jha and Dubey 2004). However, unlike our observations, in Ni-treated wheat roots inhibition in NADH-GDH activity was observed (Gajewska et al 2009).…”

Section: Discussionsupporting

confidence: 89%

Nickel and Al-excess inhibit nitrate reductase but upregulate activities of aminating glutamate dehydrogenase and aminotransferases in growing rice seedlings

Mishra

Dubey

2011

Plant Growth Regul

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The present study was undertaken to examine the influence of toxic levels of Ni and Al, on the activities of key nitrogen assimilatory enzymes in roots and shoots of growing rice seedlings. When seedlings of two inbred rice (Oryza sativa L.) cvs. Malviya-36 and Pant-12, sensitive to both Ni and Al, were raised in sand cultures containing 200 and 400 lM NiSO 4 or 80 and 160 lM Al 2 (SO 4 ) 3 , a marked inhibition in the activities of NO 3 -assimilatory enzymes NR and GS was observed in roots as well as shoots during a 5-20 day growth period. Both Ni and Al treatments, in growth medium, stimulated the activity of aminating glutamate dehydrogenase (NADH-GDH) whereas the activity of deaminating GDH (NAD ? -GDH) decreased under metal toxicities. The activities of the aminotransferases studied; alanine aminotransferase (AlaAT) and aspartate amino transferase (AspAT) increased due to Ni and Al treatments. Results suggest that both Ni and Al treatments impair N assimilation in rice seedlings by inhibiting the activities of NR and GS and that GDH appears to play a role in assimilation of NH 4 ? in metal stress conditions. Further, higher activity of aminotransferases in metal stressed seedlings might be helpful in meeting higher demand of amino acids under stressed conditions.

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Section: Discussionsupporting

confidence: 89%

Nickel and Al-excess inhibit nitrate reductase but upregulate activities of aminating glutamate dehydrogenase and aminotransferases in growing rice seedlings

Mishra

Dubey

2011

Plant Growth Regul

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“…Induction of phytochelatins is one of the main detoxification strategies against Cd by chelating Cd ions and preventing its toxicity [70]. Astolfi et al [71] have shown that S-deficient plant shows increase of ATPS, O-acetyl serine (OAS) thiol lyase activity under 100 µM Cd-treated plants, which may be a part of the defense mechanism based on the production of phytochelatins and its biosynthesis is closely dependent on S metabolism. Sulfur assimilation is considered a crucial step for plant survival under Cd stress [72].…”

Section: Macro Nutrientsmentioning

confidence: 99%

Cadmium Toxicity in Plants and Role of Mineral Nutrients in Its Alleviation

Nazar¹,

Iqbal²,

Masood³

et al. 2012

AJPS

405

158

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Cadmium (Cd) is a toxic heavy metal that enters the environment through various anthropogenic sources, and inhibits plant growth and development. Cadmium toxicity may result from disturbance in plant metabolism as a consequence of disturbance in the uptake and translocation of mineral nutrients. Plant nutrients and Cd compete for the same transporters and, therefore, presence of Cd results in mineral nutrients deficiency. The optimization of mineral nutrients under Cd stress could reduce Cd toxicity by greater availability at the transport site resulting in reduced accumulation of Cd, and could also alleviate Cd-induced toxic effects by enhancing biochemical reactions and physiological processes in plants. In the present review the role of plant macro, micro and beneficial elements in alleviating Cd stress in crop plants is discussed.

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“…Among heavy metals, cadmium (Cd) is one of the most hazardous due to its ubiquitous nature, non-biodegradability, high toxicity to biota even at low concentrations and high solubility in water (Da Silva et al 2012 ;Xie et al 2013 ). Although Cd is not an essential element for plants, it can be readily taken up and accumulated by many plants, representing a possible way to enter the food chain (Prasad 1995 ;Astolfi et al 2004 ).…”

Section: Introductionmentioning

confidence: 99%

Morphophysiological Responses, Heavy Metal Accumulation and Phytoremoval Ability in Four Willow Clones Exposed to Cadmium Under Hydroponics

et al. 2014

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Role of sulphur availability on cadmium-induced changes of nitrogen and sulphur metabolism in maize (Zea mays L.) leaves

Cited by 77 publications

References 29 publications

Nickel and Al-excess inhibit nitrate reductase but upregulate activities of aminating glutamate dehydrogenase and aminotransferases in growing rice seedlings

Nickel and Al-excess inhibit nitrate reductase but upregulate activities of aminating glutamate dehydrogenase and aminotransferases in growing rice seedlings

Cadmium Toxicity in Plants and Role of Mineral Nutrients in Its Alleviation

Morphophysiological Responses, Heavy Metal Accumulation and Phytoremoval Ability in Four Willow Clones Exposed to Cadmium Under Hydroponics

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