Aluminum tolerances of two wheat genotypes related to nitrate reductase activities

Foy, C. D.; Fleming, A. L.

doi:10.1080/01904168209363064

Cited by 108 publications

(56 citation statements)

References 19 publications

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“…It was reported that NO 3− uptake by soybean was decreased when Al concentration in solution increased from 10 to 50 µM [90] whereas, Al reduced Cl − and NO 3− uptake in maize [91]. It is also observed that Al toxicity is closely related to nitrogen metabolism [92]. It was noted that nitrate reductase activity was higher in Al tolerant cultivars, when grown in Al treated nutrient solution [93].…”

Section: Nutritional Imbalancementioning

confidence: 69%

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Molecular Basis of Aluminium Toxicity in Plants: A Review

Gupta¹,

Gaurav²,

Kumar³

2013

AJPS

161

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Aluminium toxicity in acid soils having pH below 5.5, affects the production of staple food crops, vegetables and cash crops worldwide. About 50% of the world's potentially arable lands are acidic. It is trivalent cationic form i.e. Al 3+ that limits the plant's growth. Absorbed Aluminium inhibits root elongation and adversely affects plant growth. Recently researches have been conducted to understand the mechanism of Aluminium toxicity and resistance which is important for stable food production in future. Aluminium resistance depends on the ability of the plant to tolerate Aluminium in symplast or to exclude it to soil. Physiological and molecular basis of Aluminium toxicity and resistance mechanism are important to understand for developing genetically engineered plants for Al toxicity resistance. This paper provides an overview of the state of art in this field.

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Section: Nutritional Imbalancementioning

confidence: 69%

“…Al toxicity appears as an induced Ca deficiency or reduced Ca transport problem. Excess Al even induces iron (Fe) deficiency symptoms in rice (Oryza sativa L.), sorghum and wheat [92,96,97].…”

Section: Nutritional Imbalancementioning

confidence: 99%

Molecular Basis of Aluminium Toxicity in Plants: A Review

Gupta¹,

Gaurav²,

Kumar³

2013

AJPS

161

View full text Add to dashboard Cite

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“…Compared with ES8, the higher rhizosphere pH of ET8 reflected the higher Al resistance. Foy et al (1982) reported that NO 3 --N could alleviate the toxicity effects of Al to plants. This can be due to OH -ions produced and secreted into rhizosphere during NO 3 --N metabolism process catalyzed by nitrate reductase (Taylor and Foy 1985).…”

Section: Resultsmentioning

confidence: 99%

Rhizosphere pH difference regulated by plasma membrane H+-ATPase is related to differential Al tolerance of two wheat cultivars

Yang¹,

Wang²,

Geng³

et al. 2011

PLANT SOIL ENVIRON

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Aluminum (Al)-tolerance of different cultivars shows considerable differences. Elevation of rhizosphere pH is an external Al-resistant mechanism of plants. To elucidate the correlation between Al tolerance and the capacity of plants to modify the rhizosphere pH at different Al-tolerant levels, a comparative study on the wheat (Triticum aestivum L.) cultivars ET8 (Al-tolerant) and ES8 (Al-sensitive) was performed. Rhizosphere pH of ET8 was much higher than that of ES8 under the same treatment, significant correlations were obtained among all the data of rhizosphere pH and relative root elongation (R2 = 0.9209**), or Al content in root apex (R2 = 0.9321**), which indicated that Al tolerance may be related to pH changes in the rhizosphere. The elevation of rhizosphere pH was inhibited by H+-ATPase specific inhibitor DCCD (dicylcohexylcarbodiimide, 25 mmol). Relative PM (plasma membrane) H+-ATPase activity of ET8 was significantly higher than that of ES8 under the same treatment. Significant correlation between all the data of relative PM H+-ATPase activity and rhizosphere pH (R2 = 0.8319**) were obtained. Taken together, these results suggest that PM H+-ATPase was involved in regulating rhizosphere pH. Under Al stress, the Al-tolerant line showed a stronger capacity of up-regulating rhizosphere pH by PM H+-ATPase than the Al-sensitive line, which may explain the observed differences in Al tolerance between the two wheat cultivars.

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“…Differences in leaf weight were also most Katepwa outperformed PTl4l at 300 and 400 pM, although leaf weights in the two cultivars were equally reduced at 700 and 1000 pM (Fig. 2) (1985, 1986, and 1987) (Foy et al 1974 In a number of species, Al tolerance has been associated with differences in ammonium and nitrate uptake (Fleming 1983;Taylor and Foy 1985c;Keltjens 1987;Keltjens and van Ulden 1987), high nitrate reductase activiq/ (Foy and Fleming 1982), and high protein content of grain (Mesdag et al 1970 …”

mentioning

confidence: 99%