Effects of Biofertilizers on Maize and Sunflower Seedlings under Cadmium Stress

Gajdos, É.; Lévai, László; Veres, Szilvia; Kovács, Béla

doi:10.1080/00103624.2011.638591

Cited by 30 publications

(15 citation statements)

References 12 publications

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“…Plants grown in environments with heavy metals have several physiological and metabolic changes (HOSEINI; ZARGARI, 2013). Cd causes inhibition of cell division, chlorosis, and changes in nitrogen and carbohydrate metabolism, photosynthesis, mineral nutrition, water balance, and membrane structure and permeability (GAJDOS et al, 2012). These factors, singly or combined, reduce plant growth.…”

Section: Resultsmentioning

confidence: 99%

“…Several studies have shown the capacity of sunflower crops to retain several heavy metals (CHAVES; ESTRELA; SOUZA , 2011;GAJDOS et al, 2012;NASCIMENTO et al, 2014), such as cadmium (Cd), whose presence in soils has receiving considerable attention due to its increasing rates in the soil and impacts on human health throughout the food chain.…”

Section: Introductionmentioning

confidence: 99%

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Photosynthetic Parameters as Physiological Indicators of Tolerance to Cadmium Stress in Sunflower Genotypes

et al. 2018

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The objective of the present study was to evaluate the tolerance to cadmium (Cd) of sunflower genotypes grown in greenhouse conditions, and the effectiveness of using photosynthetic parameters as physiological indicators of this tolerance. Seeds of two sunflower genotypes previously identified as tolerant (H358) and Cd-sensitive (AG960) to Cd were used. The seeds were germinated in plastic cups containing plant substrate; after 9 days, the seedlings were transplanted to plastic basins containing a nutrient solution with 0 or 10 µM of Cd, where they remained for 16 days. Samples of the plants were harvested every 5 days. The experiment was carried out in a randomized complete design, using a 4×2×2 factorial arrangement (4 days of grown in a nutrient solution with Cd, 2 sunflower genotypes, and 2 Cd levels) with four replications. Cd stress decreased CO 2 net assimilation, stomatal conductance, carboxylation efficiency, photosynthetic pigment contents, potential quantum yield (F v /F m ) , and effective quantum yield of plants of the two evaluated genotypes. The decrease in photosynthetic rates of these plants was caused by both stomatal and non-stomatal limitations. Plants of the AG960 genotype showed more pronounced deleterious effects due to Cd stress than those of the H358 genotype. Thus, CO 2 net assimilation rate, stomatal conductance, and chloroplast pigment content are good physiological indicators of sunflower tolerance to Cd and can at least in part, explain the greater tolerance of the H358 genotype to Cd stress when compared to the AG960 genotype. EFICÁCIA DOS PARÂMETROS FOTOSSINTÉTICOS COMO INDICADORES FISIOLÓGICOS DA TOLERÂNCIA AO CÁDMIO EM GIRASSOLRESUMO -O presente estudo foi conduzido em casa de vegetação objetivando-se demonstrar a tolerância ao cádmio (Cd) em genótipos de girassol e avaliar a eficácia dos parâmetros fotossintéticos como indicadores fisiológicos dessa tolerância. Para isto, foram utilizadas sementes de dois genótipos de girassol previamente identificados como tolerante (H358) e sensível (AG960) ao Cd.As sementes foram germinadas em copos plásticos contendo substrato vegetal e, após 9 dias, as plântulas foram transferidas para bacias plásticas com solução nutritiva contendo 0 ou 10 µM de Cd , onde permaneceram por 16 dias. As plantas foram coletadas a cada 5 dias. O delineamento experimental foi o inteiramente casualizado, em um arranjo fatorial 4 (dias de exposição) × 2 (genótipos) × 2 (níveis de Cd), com quatro repetições. A exposição ao Cd reduziu a taxa de assimilação líquida do CO 2 , a condutância estomática e a eficiência de carboxilação, bem como os teores de todos os pigmentos fotossintéticos, a razão F v /F m e o Y II das plantas de ambos os genótipos estudados. Demonstrando que a redução na taxa fotossintética dessas plantas foi ocasionada tanto por limitações estomáticas como não-estomáticas. Os efeitos deletérios do Cd foram mais pronunciados no genótipo AG960 em comparação com o H358. Assim, as variáveis A, gs e os teores de pigmentos mostraram-se bons indicadores fis...

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photosynthetic Parameters as Physiological Indicators of Tolerance to Cadmium Stress in Sunflower Genotypes

et al. 2018

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“…The metal toxicity may also alter many plant physiological processes including the nitrogen and carbohydrates metabolism, photosynthesis, mineral nutrients assimilation, and the plant water relationship (Gajdos et al, 2012). Cadmium induced plant tissue toxicity may be accompanied with reduced uptake of essential plant mineral nutrients.…”

Section: Introductionmentioning

confidence: 99%

“…Sunflower (Helianthus annuus L.), a fast growing crop (Gajdos et al, 2012), is the fourth largest oil producer after soybean, canola and cotton (USDA-FAS, 2015) and presents a great economical potential for biodiesel production. The genotype diversity of sunflower confers to the specie a great plasticity in response to various growth environmental conditions (Capone et al, 2012) including the environmental stress.…”

Section: Introductionmentioning

confidence: 99%

Cadmium effects on sunflower growth and mineral nutrition

Ferreira¹,

Santos²,

Moura³

et al. 2016

Afr. J. Agric. Res.

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A hydroponic greenhouse study was carried out to evaluate the effects of increasing cadmium (Cd) concentration on plant growth, mineral nutrition and Cd distribution of H-250 sunflower genotype. Exposure to increasing Cd concentrations reduced plant biomass by 40, 34, 47 and 42% of the total, leaves, stem and roots dry weights as compared to the control. Regardless of the treatment most of Cd uptake by the genotype was allocated in the root, followed by leaf and stem. The higher bioconcentration factors values in both above ground and underground plant tissues and low transfer factor value indicated that this genotype may be an alternative for use in phytostabilization programs. The results also showed that increasing Cd concentration disrupted plant homeostasis as it increased the concentration of some nutrients and had adverse effect on others, impacting plant growth. In this context, the results suggest that the low magnesium, iron and manganese concentrations in the leaves were the main cause for plant biomass reduction and leaf chlorosis and necrosis, as each one of these elements plays a key role on the chlorophyll molecule and on photosynthesis process.

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“…Other studies with the use of biofertilizers in the development of tours also try to improve the culture as in Braga et al (2017), with the use of reservoir sediments to grow sunflower plants and Gajdos et al (2012) to investigate the effects of biofertilizers on plant production and nutrient uptake in some Cd-contaminated soils.…”

Section: Introductionmentioning

confidence: 99%

Viability of Biofertilizer Produced by an Indian Biodigester Prototype Applied to Sunflower Plants

Moura¹,

Teixeira²,

Gondim³

et al. 2017

JAS

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Biodigesters have been used to convert biomass into biogas and biofertilizers. This energy use has been important for the reduction of solid waste pollution in the environment. This work aims to analyse the viability of the use of pig biofertilizer produced by an Indian biodigester prototype, monitored by a data acquisition system. The biodigester used was an Indian prototype built on a low cost material that is easy to acquire (polyvinyl chloride-PVC). After the biofertilizer production, we tested its efficiency and viability under conditions of vegetation house in the cultivation of sunflower plants. The experimental design was completely randomized in a factorial arrangement with 4 concentrations of biofertilizer (0, 40, 80 and 120 kg N ha -1 ) × 4 harvest periods (14, 21, 25 and 29 days after sowing). We evaluated biometric and vigor parameters by measurements of stem diameter, height of the aerial part, number of leaves and production of fresh and dry matter of roots, aerial and total parts, as well as the relative chlorophyll content. We performed the experiment with five repetitions using two plants each and we submitted the data to analysis of variance (ANOVA) and polynomial regression using the statistical software Sisvar 5.4. The functional Indian biodigester prototype produced a biofertilizer of excellent quality and viability as a biofertilizer for the initial growth of sunflower plants. The biofertilizer served as a nutritional source in the sunflower crop, since it provided increases in all the growth parameters analyzed in relation to the control group (plants in the absence of biofertilizer), especially in the concentration of 120 kg N ha -1 .

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Effects of Biofertilizers on Maize and Sunflower Seedlings under Cadmium Stress

Cited by 30 publications

References 12 publications

Photosynthetic Parameters as Physiological Indicators of Tolerance to Cadmium Stress in Sunflower Genotypes

Photosynthetic Parameters as Physiological Indicators of Tolerance to Cadmium Stress in Sunflower Genotypes

Cadmium effects on sunflower growth and mineral nutrition

Viability of Biofertilizer Produced by an Indian Biodigester Prototype Applied to Sunflower Plants

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