Investigation into the relationship among Cd bioaccumulation, nutrient composition, ultrastructural changes and antioxidative metabolism in lettuce genotypes under Cd stress

Lavres, José; Rabêlo, Flávio Henrique Silveira; Capaldi, Flávia Regina; Reis, André Rodrigues dos; Rosssi, Monica Lanzoni; Franco, Mônica Regina; Azevedo, Ricardo Antunes; Abreu-Junior, Cassio Hamilton; Nogueira, Neusa de Lima

doi:10.1016/j.ecoenv.2018.12.033

Cited by 38 publications

(11 citation statements)

References 53 publications

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“…Stomatal density (Std, stomates per square millimeter) was calculated using the two youngest fully expanded leaves per plant (Mateus et al, 2019) on abaxial and adaxial surfaces, applying the software package ImageJ 1 . Complementary micrograph material of Std was obtained by scanning electron microscopy (JEOL JSM-IT300 LV, Tokyo-Japan) at 20 kV, and digital images were recorded (Lavres et al, 2019).…”

Section: Stomatal Density and Leaf Areamentioning

confidence: 99%

Partial Substitution of K by Na Alleviates Drought Stress and Increases Water Use Efficiency in Eucalyptus Species Seedlings

et al. 2021

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Eucalyptus, the most widely planted tree genus worldwide, is frequently cultivated in soils with low water and nutrient availability. Sodium (Na) can substitute some physiological functions of potassium (K), directly influencing plants’ water status. However, the extent to which K can be replaced by Na in drought conditions remains poorly understood. A greenhouse experiment was conducted with three Eucalyptus genotypes under two water conditions (well-watered and water-stressed) and five combination rates of K and Na, representing substitutions of 0/100, 25/75, 50/50, 75/25, and 100/0 (percentage of Na/percentage of K), to investigate growth and photosynthesis-related parameters. This study focused on the positive effects of Na supply since, depending on the levels applied, the Na supply may induce plants to salinity stress (>100 mM of NaCl). Plants supplied with low to intermediate K replacement by Na reduced the critical level of K without showing symptoms of K deficiency and provided higher total dry matter (TDM) than those Eucalyptus seedlings supplied only with K in both water conditions. Those plants supplied with low to intermediate K replacement by Na had improved CO2 assimilation (A), stomatal density (Std), K use efficiency (UEK), and water use efficiency (WUE), in addition to reduced leaf water potential (Ψw) and maintenance of leaf turgidity, with the stomata partially closed, indicated by the higher values of leaf carbon isotope composition (δ13C‰). Meanwhile, combination rates higher than 50% of K replacement by Na led to K-deficient plants, characterized by the lower values of TDM, δ13C‰, WUE, and leaf K concentration and higher leaf Na concentration. There was positive evidence of partial replacement of K by Na in Eucalyptus seedlings; meanwhile, the ideal percentage of substitution increased according to the drought tolerance of the species (Eucalyptus saligna < Eucalyptus urophylla < Eucalyptus camaldulensis).

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Section: Stomatal Density and Leaf Areamentioning

confidence: 99%

Partial Substitution of K by Na Alleviates Drought Stress and Increases Water Use Efficiency in Eucalyptus Species Seedlings

et al. 2021

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“…When present at high concentrations in plant tissues, Ba, Cd, Cu, Ni and Zn inhibit plant growth and decrease photosynthetic activity (Moya et al 1993;Gupta et al 2019;Lavres et al 2019). In our study, the biomass production of lettuce exposed to Cu, Ni and Zn was strongly lower than the control (Figs.…”

Section: Discussionmentioning

confidence: 49%

“…Crops such as lettuce (Lactuca sativa L.), rice (Oryza sativa L.), sun ower (Helianthus annuus L.) and tomato (Solanum lycopersicum L.) are between the most consumed food in the world, and these crops can accumulate TEs in their edible parts in concentrations enough to cause clinical problems to humans (Piotto et al 2018;Gupta et al 2019;Lavres et al 2011Lavres et al , 2019. Nervous, cardiovascular, renal, and neurological impairment as well as bone diseases caused by TEs have been reported in humans (Tchounwou et al 2012;Petrosino et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Physiological effects of TEs toxicity in plants include reductions on biomass, changes on photosynthetic e ciency and transpiration (Gupta et al 2019). Changes on chlorophyll synthesis and starch accumulation have been reported also in plants exposed to many TEs (Moya et al 1993;Piotto et al 2018;Lavres et al 2019). In this sense, a lower TEs uptake and translocation is desirable to avoid photosynthetic damages and to decrease TEs intake by humans.…”

Section: Introductionmentioning

confidence: 99%

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Photosynthetic Parameters and Growth of Rice, Lettuce, Sunflower and Tomato in an Entisol as Affected by Soil Acidity and Bioaccumulation of Ba, Cd, Cu, Ni, and Zn

Rabêlo

Lavres

Pinto

et al. 2021

Arch Environ Contam Toxicol

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The bioaccumulation of trace elements (TEs) in crops consumed by humans can lead to a lower food production due to photosynthetic damages and several diseases in humans, but decreasing soil acidity could mitigate these problems by decreasing TEs bioavailability. Thus, we evaluate the effect of increasing soil base saturation (BS%) on photosynthesis, growth and bioaccumulation of barium (Ba), cadmium (Cd), copper (Cu), nickel (Ni) or zinc (Zn) in lettuce (Lactuca sativa L.), rice (Oryza sativa L.), sun ower (Helianthus annuus L.) and tomato (Solanum lycopersicum L.) grown in sandy Entisol. The crops were grown in uncontaminated or contaminated Entisol, under two BS% ratios: 30% for all crops or 50% for rice and 70% for lettuce, sun ower and tomato. The photosynthesis-related parameters varied depending on the metal and crop, but in general, increasing BS% did not attenuate photosynthetic damages induced by Ba, Cd, Cu, Ni and Zn in the crops. There was no strong correlation between the photosynthetic parameters measured and biomass production, which suggest us that the suppression on biomass induced by Ba, Cd, Cu, Ni or Zn is related to other metabolic disorders besides the impairment on CO 2 assimilation or chlorophyll synthesis in the crops assayed, with exception of Ni and Zn in lettuce. In conclusion, increasing BS% was not consistent in decreasing Ba, Cd, Cu, Ni and Zn accumulation in the edible parts of lettuce, rice, sun ower and tomato grown in the sandy soil, which probably is related to the low capacity of this soil in control TEs bioavailability.

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“…Stomatal density (std; stomates mm -2 ) was calculated using the two youngest fully expanded leaves per plant (MATEUS et al, 2019), in abaxial and adaxial surface, applying the software package ImageJ (https://imagej.nih.gov/ij/). Complementary micrograph material of Std was obtained by scanning electron microscopy (JEOL JSM-IT300 LV, Tokyo-Japan) at 20 kV, and digital images were recorded (LAVRES et al, 2019).…”

Section: Chlorophyll Content Stomatal Density (Std) and Leaf Area (La)mentioning

confidence: 99%

Integrated effects of K and Na application on initial growth of eucalyptus seedlings submitted to water stress: water use efficiency, leaf gas exchange and 13C isotopic variation

Mateus¹

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Investigation into the relationship among Cd bioaccumulation, nutrient composition, ultrastructural changes and antioxidative metabolism in lettuce genotypes under Cd stress

Cited by 38 publications

References 53 publications

Partial Substitution of K by Na Alleviates Drought Stress and Increases Water Use Efficiency in Eucalyptus Species Seedlings

Partial Substitution of K by Na Alleviates Drought Stress and Increases Water Use Efficiency in Eucalyptus Species Seedlings

Photosynthetic Parameters and Growth of Rice, Lettuce, Sunflower and Tomato in an Entisol as Affected by Soil Acidity and Bioaccumulation of Ba, Cd, Cu, Ni, and Zn

Integrated effects of K and Na application on initial growth of eucalyptus seedlings submitted to water stress: water use efficiency, leaf gas exchange and 13C isotopic variation

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