Silicon amelioration of manganese toxicity in Mn-sensitive and Mn-tolerant maize varieties

Doncheva, Snejana; Poschenrieder, Charlotte; Stoyanova, Z.; Georgieva, Katya; Velichkova, M.; Barceló, Juan Antonio

doi:10.1016/j.envexpbot.2008.11.006

Cited by 143 publications

(73 citation statements)

References 53 publications

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“…The first symptoms of Mn toxicity appear on the oldest leaves of plants as chlorosis, which later progresses to necrosis [62]. In addition, plants exposed to excess Mn exhibit a very strong inhibition of chloroplast structure and functions, reduced photosynthetic and transpiration rates, and inhibition of carbon dioxide (CO 2 ) fixation as a result of stomatal closure [63,64]. To date, there is a very limited number of published reports on manganese toxicity in plants.…”

Section: Manganese Toxicitymentioning

confidence: 99%

“…Different plant species and genotypes respond differently for tolerance to Mn toxicity [64,90]. The tolerance of maize plants to Mn toxicity has been attributed to tolerance to high tissue concentrations of Mn [63]. Stoyanova et al [64] evaluated four cultivars of maize under high and toxic concentrations and found that the most tolerant genotype, Kneja 434, expressed a stronger internal capacity of protection against the phytotoxicity of Mn and a higher potential of Mn detoxification.…”

Section: Mechanisms Of Tolerance To Low Soil Phmentioning

confidence: 99%

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Breeding Maize for Tolerance to Acidic Soils: A Review

et al. 2018

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Acidic soils hamper maize (Zea mays L.) production, causing yield losses of up to 69%. Low pH acidic soils can lead to aluminum (Al), manganese (Mn), or iron (Fe) toxicities. Genetic variability for tolerance to low soil pH exists among maize genotypes, which can be exploited in developing high-yielding acid-tolerant maize genotypes. In this paper, we review some of the most recent applications of conventional and molecular breeding approaches for improving maize yield under acidic soils. The gaps in breeding maize for tolerance to low soil pH are highlighted and an emphasis is placed on promoting the adoption of the numerous existing acid soil-tolerant genotypes. While progress has been made in breeding for tolerance to Al toxicity, little has been done on Mn and Fe toxicities. More research inputs are therefore required in: (1) developing screening methods for tolerance to manganese and iron toxicities; (2) elucidating the mechanisms of maize tolerance to Mn and Fe toxicities; and, (3) identifying the quantitative trait loci (QTL) responsible for Mn and Fe tolerance in maize cultivars. There is also a need to raise farmers' and other stakeholders' awareness of the problem of Al, Mn, and Fe soil toxicities to improve the adoption rate of the available acid-tolerant maize genotypes. Maize breeders should work more closely with farmers at the early stages of the release process of a new variety to facilitate its adoption level. Researchers are encouraged to strengthen their collaboration and exchange low soil pH-tolerant maize germplasm.

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Section: Manganese Toxicitymentioning

confidence: 99%

Section: Mechanisms Of Tolerance To Low Soil Phmentioning

confidence: 99%

Breeding Maize for Tolerance to Acidic Soils: A Review

et al. 2018

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“…Manganese rates did not affect leaf area at the first cut, averaging 64.65 cm 2 (Fig 2) but affected leaf area at the second cut, reaching 121.57 cm 2 with 51.70 mg dm -3 , an increase of approximately 17% compared to the initial value of 103.93 cm 2 (Fig 2). The increase in Mn uptake due to higher availability of the nutrient in the soil increases the synthesis of nonstructural carbohydrates (Marschner, 2012) and, consequently, the synthesis of lignin, resulting in perennial leaves (Doncheva et al, 2009) and increased leaf area. However, excess of Mn is detrimental to plants and may reduce leaf biomass (Marschner, 2012;Saidi et al, 2014) by chlorophyll degradation (Papadakis et al, 2007) with consequent low carboxylation efficiency (Millaleo et al, 2013).…”

Section: Plant Height Leaf Area and Relative Chlorophyll Indexmentioning

confidence: 99%

Growth, nutrition and production of dry matter of Kikuyu Grass (Brachiaria humidicula) as a function of Mn-fertilizer

Arruda¹,

Flores²,

Damin³

et al. 2016

Aust J Crop Sci

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Manganese (Mn) is important to increase forage crop yields. However, there is little information regarding the adequate Mn-fertilizer rates for Brachiaria humidicula species. The objective of this research was to evaluate the effect of manganese on growth, nutrition and yield of Brachiaria humidicula. The study was carried out in a green house in a randomized block design with five rates of manganese (0, 15, 30, 60 and 120 mg dm -3 ) and four replicates. Were evaluated plant height, leaf area, relative chlorophyll index, dry matter production, manganese accumulation and content, besides absorption efficiencies and transport and use of manganese (Mn). Brachiaria humidicula showed high tolerance to this nutrient, because the application of only 120 mg dm -3 to the soil was phytotoxic, showing symptoms such as brown spots and leaf tip curling. Manganese applied at a dose of 120 mg dm -3 reduced aerial part biomass yield by 25% and promoted lower efficiency of use of this nutrient by the forage by 49%. However, even with the initial content of manganese in the soil considered sufficient to meet nutritional demands to achieving high yields, the application of 60 mg dm -3 of manganese to the soil is recommended.

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“…The increased thickness of the epidermal layers suggests an important role for these cells in Mn tolerance, both in genetic Mn tolerance and in Si-induced tolerance (Doncheva et al, 2009). In the presence of Si, Brassica plants showed more accelerated endoderm development, compared with plants grown only in the presence of Cd.…”

Section: Chlorophyll Fluorescence Monitoringmentioning

confidence: 99%

Effects of Silicon on Alleviating Arsenic Toxicity in Maize Plants

Silva

Nascimento

Neto

et al. 2015

Rev. Bras. Ciênc. Solo

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Arsenic is a metalloid highly toxic to plants and animals, causing reduced plant growth and various health problems for humans and animals. Silicon, however, has excelled in alleviating stress caused by toxic elements in plants. The aim of this study was to investigate the effects of Si in alleviating As stress in maize plants grown in a nutrient solution and evaluate the potential of the spectral emission parameters and the red fluorescence (Fr) and far-red fluorescence (FFr) ratio obtained in analysis of chlorophyll fluorescence in determination of this interaction. An experiment was carried out in a nutrient solution containing a toxic rate of As (68 μmol L -1 ) and six increasing rates of Si (0, 0.25, 0.5, 1.0, 1.5, and 2.0 mmol L -1 ). Dry matter production and concentrations of As, Si, and photosynthetic pigments were then evaluated. Chlorophyll fluorescence was also measured throughout plant growth. Si has positive effects in alleviating As stress in maize plants, evidenced by the increase in photosynthetic pigments. Silicon application resulted in higher As levels in plant tissue; therefore, using Si for soil phytoremediation may be a promising choice. Chlorophyll fluorescence analysis proved to be a sensitive tool, and it can be successfully used in the study of the ameliorating effects of Si in plant protection, with the Fr/FFr ratio as the variable recommended for identification of temporal changes in plants.

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Silicon amelioration of manganese toxicity in Mn-sensitive and Mn-tolerant maize varieties

Cited by 143 publications

References 53 publications

Breeding Maize for Tolerance to Acidic Soils: A Review

Breeding Maize for Tolerance to Acidic Soils: A Review

Growth, nutrition and production of dry matter of Kikuyu Grass (Brachiaria humidicula) as a function of Mn-fertilizer

Effects of Silicon on Alleviating Arsenic Toxicity in Maize Plants

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