Effects of Silicon on Alleviating Arsenic Toxicity in Maize Plants

Silva, Airon José da; Nascimento, Clístenes Williams Araújo do; Neto, Artur da Silva Gouveia; Silva, Elias Arcanjo

doi:10.1590/01000683rbcs20150176

Cited by 32 publications

(9 citation statements)

References 33 publications

(35 reference statements)

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“…This can be done because the chlorophyll molecule is fluorescent, which makes it possible to detect changes in electron transfer at the level of chloroplast membranes through photon dissipation [12]. One of the great advantages of this technique is that it is sensitive to disorders of the photosynthetic cell membrane without destroying the plant tissues of the species under study [13]. Rosenqvist and van Kooten [14] state that any variation in the values between 0.79 to 0.84 indicates that the PSII reaction centers are being affected.…”

Section: Introductionmentioning

confidence: 99%

Chlorophyll α Fluorescence Parameters as an Indicator to Identify Drought Susceptibility in Common Bush Bean

Sánchez-Reinoso¹,

Moreno²,

Restrepo-Díaz³

2019

Agronomy

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The common bean is susceptible to drought conditions and the evaluation of plant responses to low water availability can be difficult. The quantification of chlorophyll fluorescence as a sensitive trait to environmental stresses is an important alternative in the characterization of drought-susceptible genotypes. The objective of this study was to evaluate mainly the use of chlorophyll α fluorescence (maximum efficiency of PSII (Fv/Fm), photochemical quenching (qP), non-photochemical quenching (NPQ)) and rapid light-response curves (RLCs) (initial slope of the curve (α), minimum saturation irradiance (Ik) and maximum relative electron transport rate (ETRmax)) parameters as tools for the identification of susceptible or tolerant bush bean cultivars to water deficit stress conditions in two different phenological stages. Using a randomized block design in a factorial arrangement, five bush bean cultivars (Cerinza, Bachue, NUA35, Bacata and Bianca) were evaluated under water deficit conditions by the suspension of irrigation for 15 days from 40 to 55 Days after Emergence (DAE) (vegetative stage) or 50 to 65 DAE (reproductive stage). The results showed that Fv/Fm and NPQ recorded the highest variation due to water deficit conditions, especially in the vegetative stage. The greatest reductions in Fv/Fm (0.67) and NPQ (0.71) were evidenced in cultivar NUA35 compared to its control plants (0.78 and 1.07, respectively). The parameters obtained from RLCs showed that cultivar Bacata registered the lowest α (0.17) and Ik (838.19 μmol∙m−2∙s−1) values compared to its control plants (α 0.23; Ik 769.99 μmol∙m−2∙s−1). Differences were only obtained in ETRmax in the reproductive stage (50–65 DAE) in which cultivar NUA35 reached values of 158.5 in stressed plants compared to control plants (251.22). In conclusion, the parameters derived from RLCs such as α and Ik can be used as tools to identify drought susceptibility in the vegetative stage, whereas ETRmax can be used in the reproductive stage. In addition, PSII photochemistry (Fv/Fm and NPQ) can also help to understand the agronomic responses of common bush bean cultivars to drought conditions.

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Section: Introductionmentioning

confidence: 99%

Chlorophyll α Fluorescence Parameters as an Indicator to Identify Drought Susceptibility in Common Bush Bean

Sánchez-Reinoso¹,

Moreno²,

Restrepo-Díaz³

2019

Agronomy

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“…Silicon positively altered the toxic effects of arsenic stress in maize by improving the level of chlorophyll along with efficiency in photosynthetic parameters. Alleviation of arsenic stress was dependant on the dose of Si applied and doses greater than 1 mmol•L −1 increased stress, indicating the existence of an optimal dose of Si for stress alleviation [46]. Silicon supply to three different rice paddy soils reduced arsenic concentrations in rice straw, flag leaf, husk, brown rice, and polished rice [47].…”

Section: On Arsenic Stressmentioning

confidence: 95%

Versatile Potentiality of Silicon in Mitigation of Biotic and Abiotic Stresses in Plants: A Review

Seal¹,

Das²,

Biswas³

2018

AJPS

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The "quasi-essential element" silicon (Si) is not considered indispensable for plant growth and its accumulation varies between species largely due to differential uptake phenomena. Silicon uptake and distribution is a complex process involving the participation of three transporters (Lsi1, Lsi2 and Lsi6) and is beneficial during recovery from multiple stresses. This review focuses on the pivotal role of silicon in counteracting several biotic and abiotic stresses including nutrient imbalances, physical stresses together with uptake, transport of this metalloid in a wide variety of dicot and monocot species. The knowledge on the beneficial effects of silicon and possible Si-induced mechanisms of minimizing stress has been discussed. Accumulation of silicon beneath the cuticles fortifies the cell wall against pathogen attack. Si-induced reduction of heavy metal uptake, root-shoot translocation, chelation, complexation, upregulation of antioxidative defense responses and regulation of gene expression are the mechanisms involved in alleviation of heavy metal toxicity in plants. Silicon further improves growth and physiological attributes under salt and drought stress. Effective use of silicon in agronomy can be an alternative to the prevalent practice of traditional fertilizers for maintaining sustainable productivity. Therefore, soil nutrition with fertilizers containing plant-available silicon may be considered a cost-effective way to shield plant from various stresses, improve plant growth as well as yield and attain sustainable cultivation worldwide.

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“…However, the Fr/FFr ratio increases when PSII is disturbed. The Fv/Fm and Fr/FFr ratios demonstrate opposite behaviors under normal photosynthetic conditions (Marques & Nascimento, 2013;Silva et al, 2015). Use of the Fr/FFr ratio allowed detection of changes in PSII when plants showed no visual symptoms of toxicity.…”

Section: Chlorophyll Fluorescencementioning

confidence: 99%

“…Use of the Fr/FFr ratio allowed detection of changes in PSII when plants showed no visual symptoms of toxicity. Therefore, chlorophyll fluorescence is a useful tool for monitoring Pb toxicity in castor bean plants, corroborating results found in studies of Cd toxicity (Silva, Nascimento, Gouveia-Neto, & Silva-Jr., 2012;Marques & Nascimento, 2013;, As toxicity (Stoeva, Berova, & Zlatev, 2004;(Silva et al, 2015), Ni toxicity (Gopal, Mishra, Zeeshan, Prasad, & Joshi, 2002;Mishra & Gopal, 2008), Cu and Hg toxicities (Ventrella, Catucci, Piletska, Piletsky, & Agostiano, 2009), Zn (Cherif et al, 2010;Marques & Nascimento, 2014;Marques et al, 2017) and Pb toxicity (Marques et al, 2017).…”

Section: Chlorophyll Fluorescencementioning

confidence: 99%

“…This is possible because the chlorophyll molecule is fluorescent, and through photon dissipation, changes in electron transfer at the level of chloroplast membranes can be detected (Lin, Liu, Lin, Pan, & Peng, 2007). Another significant advantage of this technique is that it is sensitive to photosynthetic cell membrane disorders but does not destroy plant tissue (Cherif et al, 2010;Silva, Nascimento, Gouveia-Neto, & Silva-Jr., 2015;Marques & Nascimento, 2013).…”

Section: Introductionmentioning

confidence: 99%

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<b>Metabolic alterations and X-ray chlorophyll fluorescence for the early detection of lead stress in castor bean (<i>Ricinus communis</i>) plants

Nascimento

Marques

2018

Acta Sci. Agron.

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The remediation of lead-contaminated areas poses a serious challenge to soil chemists because Pb has low solubility in soil. Thus, Pb phytostabilization is considered to be an attractive remediation technique. Castor bean (Ricinus communis) is an oilseed crop known for its tolerance to heavy metals, and our aim was to assess the early detection of Pb toxicity and the effects of Pb on the biomass, photosynthetic pigments, antioxidative enzyme activities, and total soluble proteins of this plant. Specimens were grown in a nutrient solution spiked with Pb concentrations of 25, 50, 100, 150, or 200 µmol L-1. A control without Pb was also grown. The results show that X-ray chlorophyll fluorescence is an efficient technique for the early detection of photosystem II alterations driven by Pb toxicity. Castor bean was tolerant to the Pb doses tested; plants presented no changes in photosynthetic pigments, defense enzyme activities, or total soluble proteins in leaves. Given its ability to tolerate and accumulate Pb in its roots, castor bean is a viable alternative for phytostabilization and phytoattenuation of lead-contaminated areas. It is also economically attractive for industrial and biofuel oil production while being used for remediation.

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Effects of Silicon on Alleviating Arsenic Toxicity in Maize Plants

Cited by 32 publications

References 33 publications

Chlorophyll α Fluorescence Parameters as an Indicator to Identify Drought Susceptibility in Common Bush Bean

Chlorophyll α Fluorescence Parameters as an Indicator to Identify Drought Susceptibility in Common Bush Bean

Versatile Potentiality of Silicon in Mitigation of Biotic and Abiotic Stresses in Plants: A Review

<b>Metabolic alterations and X-ray chlorophyll fluorescence for the early detection of lead stress in castor bean (<i>Ricinus communis</i>) plants

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