MERCURY AFFECTS AQUAPORINS ACTIVITY AND GERMINATION OF THE EMBRYONIC AXIS OF Schizolobium parahyba (VELL.) BLAKE (FABACEAE)

Magistrali, Paulo Roberto; Borges, Eduardo Euclydes de Lima e; Oliveira, Juraci Alves de; Faria, José Márcio Rocha; Ataíde, Glauciana da Mata; Nascimento, Janice Ferreira do

doi:10.1590/1806-90882019000600001

Cited by 3 publications

(3 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Roots are the primary organ to contact the Hg , which could be distributed to the overall plant via the phloem. Phytotoxicity of Hg resulted from loss of function on targeted aquaporin [ 22 , 23 ]; thus, this protein family in cotton is sensitive to Hg . In wheat, significant phytotoxicity was at above 10 μM Hg concentration, as the phytotoxicity appeared in upland cotton.…”

Section: Discussionmentioning

confidence: 99%

Mercury-Induced Phytotoxicity and Responses in Upland Cotton (Gossypium hirsutum L.) Seedlings

Mei

Zhu

Zhang

et al. 2021

Plants

View full text Add to dashboard Cite

Cotton is a potential and excellent candidate to balance both agricultural production and remediation of mercury-contained soil, as its main production fiber hardly involves into food chains. However, in cotton, there is known rarely about the tolerance and response to mercury (Hg) environments. In this study, the biochemical and physiological damages, in response to Hg concentrations (0, 1, 10, 50 and 100 µM), were investigated in upland cotton seedlings. The results on germination of cottonseeds indicated the germination rates were suppressed by high Hg levels, as the decrease of percentage was more than 10% at 1000 µM Hg. Shoots and roots’ growth were significantly inhibited over 10 µM Hg. The inhibitor rates (IR) in fresh weight were close in values between shoots and roots, whereas those in dry weight the root growth were more obviously influenced by Hg. In comparison of organs, the growth inhibition ranked as root > leaf > stem. The declining of translocation factor (TF) opposed the Hg level as even low to 0.05 at 50 µM Hg. The assimilation in terms of photosynthesis, of cotton plants, was affected negatively by Hg, as evidenced from the performances on pigments (chlorophyll a and b) and gas exchange (Intercellular CO2 concentration (Ci), CO2 assimilation rate (Pn) and stomatal conductance (Gs)). Sick phenotypes on leaf surface included small white zone, shrinking and necrosis. Membrane lipid peroxidation and leakage were Hg dose-dependent as indicated by malondialdehyde (MDA) content and relative conductivity (RC) values in leaves and roots. More than 10 µM Hg damaged antioxidant enzyme system in both leaves and roots (p < 0.05). Concludingly, 10 µM Hg post negative consequences to upland cotton plants in growth, physiology and biochemistry, whereas high phytotoxicity and damage appeared at more than 50 µM Hg concentration.

show abstract

Section: Discussionmentioning

confidence: 99%

Mercury-Induced Phytotoxicity and Responses in Upland Cotton (Gossypium hirsutum L.) Seedlings

Mei

Zhu

Zhang

et al. 2021

Plants

View full text Add to dashboard Cite

show abstract

“…Mei et al [13] reported that Hg is able to bind with proteins of water channels in root cells, creating a barrier to the flow of water and thus affecting transpiration and inhibited uptake and transport of nutrients in cotton seedlings. An Hg-induced loss of function of aquaporin was recorded by Magistrali et al [43]. A maximum reduction of 68.3% in RWC was observed in Hg treated seedlings; however, it escalated to 89.8, 92.5 and 97% with SNP, GR24 and SNP + GR24 treatments, respectively.…”

Section: Discussionmentioning

confidence: 77%

Nitric Oxide and Strigolactone Alleviate Mercury-Induced Oxidative Stress in Lens culinaris L. by Modulating Glyoxalase and Antioxidant Defense System

Kapoor

Ahmad

Shakoor

et al. 2023

Plants

View full text Add to dashboard Cite

Developmental activities have escalated mercury (Hg) content in the environment and caused food security problems. The present investigation describes mercury-incited stress in Lens culinaris (lentil) and its mitigation by supplementation of sodium nitroprusside (SNP) and strigolactone (GR24). Lentil exposure to Hg decreased root and shoot length, relative water content and biochemical variables. Exogenous application of SNP and GR24 alone or in combination enhanced all of the aforementioned growth parameters. Hg treatment increased electrolyte leakage and malondialdehyde content, but this significantly decreased with combined application (Hg + SNP + GR24). SNP and GR24 boosted mineral uptake and reduced Hg accumulation, thus minimizing the adverse impacts of Hg. An increase in mineral accretion was recorded in lentil roots and shoots in the presence of SNP and GR24, which might support the growth of lentil plants under Hg stress. Hg accumulation was decreased in lentil roots and shoots by supplementation of SNP and GR24. The methylglyoxal level was reduced in lentil plants with increase in glyoxalase enzymes. Antioxidant and glyoxylase enzyme activities were increased by the presence of SNP and GR24. Therefore, synergistic application of nitric oxide and strigolactone protected lentil plants against Hg-incited oxidative pressure by boosting antioxidant defense and the glyoxalase system, which assisted in biochemical processes regulation.

show abstract

“…Human action degrades natural ecosystems to maintain its population and economic growth (García-Orth and Martínez-Ramos, 2011;Magistrali et al, 2019). The recovery of these areas is a priority but requires time (Amaral et al, natural phosphate mixed with substrate at a dosage of 160g and planted at the same time in September 2014.…”

Section: Introductionmentioning

confidence: 99%

Distribution pattern of arthropods and their ecological interactions on the leaf surfaces of Terminalia argentea saplings

Oliveira,

Demolin-Leite,

Veloso

et al. 2024

Braz. J. Biol.

View full text Add to dashboard Cite

Terminalia argentea tree, native to Brazil, is widely used in landscaping, recovering degraded areas, its wood, coal production, and the bark or leaf extracts has medicinal use. Despite of its importance, the arthropod fauna associated to this plant and its interspecific relationships still needs further studies. The objectives of this study were to evaluate the arthropods, their ecological indices and the distribution in the leaf faces on T. argentea saplings. The numbers of phytophagous insects (e.g., Cephalocoema sp.), pollinators (e.g., Tetragonisca angustula), and natural enemies (e.g., Oxyopidae), and their ecological indices (e.g., species richness), were higher on the adaxial leaf faces on T. argentea saplings. Aggregated distribution of phytophagous insects (e.g., Aphis spiraecola), pollinators (e.g., Trigona spinipes), and natural enemies (e.g., Camponotus sp.) on T. argentea saplings was observed. Abundance, diversity, and species richness of natural enemies correlated, positively, with those of phytophagous and pollinators insects. Predators and tending ants followed their prey and sucking insects, respectively. Tending ants protected sucking insects against predators, and reduced chewing insects. The high number of Cephalocoema sp. on T. argentea saplings is a problem, because this insect can feed on leaves of this plant, but its preference for the adaxial leaf face favors its control. The aggregation behavior of arthropods on T. argentea saplings favors the control of potential pests of this plant. There seems to be competition between tending ants for space and food resources on T. argentea saplings.

show abstract

MERCURY AFFECTS AQUAPORINS ACTIVITY AND GERMINATION OF THE EMBRYONIC AXIS OF Schizolobium parahyba (VELL.) BLAKE (FABACEAE)

Cited by 3 publications

References 39 publications

Mercury-Induced Phytotoxicity and Responses in Upland Cotton (Gossypium hirsutum L.) Seedlings

Mercury-Induced Phytotoxicity and Responses in Upland Cotton (Gossypium hirsutum L.) Seedlings

Nitric Oxide and Strigolactone Alleviate Mercury-Induced Oxidative Stress in Lens culinaris L. by Modulating Glyoxalase and Antioxidant Defense System

Distribution pattern of arthropods and their ecological interactions on the leaf surfaces of Terminalia argentea saplings

Contact Info

Product

Resources

About