Molybdenum accumulation, tolerance and molybdenum–selenium–sulfur interactions in Astragalus selenium hyperaccumulator and nonaccumulator species

DeTar, Rachael Ann; Alford, Élan R.; Pilon-Smits, Elizabeth A. H.

doi:10.1016/j.jplph.2015.05.009

Cited by 24 publications

(17 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Molybdenum also appears to move through the first step of the S assimilation pathway and due to the similarity between the oxyanions (sulfate/selenate/molybdate), Mo may also interact with certain Se binding proteins and is rapidly accumulated in selenate-enriched plants. 2,58 Thus, this increase in uptake and assimilation of Se, S, and Mo may confirm the supposition that selenate hyperaccumulation capacity may also facilitate Mo accumulation.…”

Section: Minerals Accumulation Pca and Theoretical Calculationsmentioning

confidence: 52%

“…1,27,28,48,49 It is worth highlighting that although the lettuce plant is not a Se hyperaccumulator, the element concentration in the shoot for the selenate-enriched plant at the highest Se concentration is almost 0.1% of dried weight, a characteristic of hyperaccumulating plants. 2 In addition, under the same growing and biofortification conditions, lettuce showed to accumulate higher Se concentrations in the edible portion than radish, tomato, rice and strawberry. On the other hand, considering alfalfa, chicory and cucumber, the Se concentration levels were comparable.…”

Section: Minerals Accumulation Pca and Theoretical Calculationsmentioning

confidence: 95%

“…[1][2][3][4][5][6][7] After being absorbed by the gut this element plays an important anti-oxidant role, primarily as selenomethionine (SeMet), acting in the treatment and prevention of cancer and cardiac diseases. Despite its relevant characteristics, Se is not present in appropriate levels in most types of food and this low ingestion level has been associated with a massive list of direct and indirect negative health effects.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Selenite and Selenate Application on Mineral Composition of Lettuce Plants Cultivated Under Hydroponic Conditions: Nutritional Balance Overview Using a Multifaceted Study

Silva¹,

Cidade²,

Heerdt³

et al. 2017

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

The effect of selenate and selenite enrichment on mineral composition of a red type of lettuce cv. "Veneza roxa" was evaluated using inductively coupled plasma-optical emission spectroscopy (ICP OES), molecular modeling and principal component analysis (PCA). Both Se species did not show toxicity, while selenate promoted the greatest Se accumulation by the plant. There was an increase of 886 µg of Se per 100 g of fresh sample at different concentrations of selenate, but for selenite the maximum variation was only of 114 µg per 100 g. Selenate promoted the absorption of Mo and S and the reduction of K, Mn and P, meanwhile selenite increased Mn and decreased Mo accumulation. Copper and Fe absorption was negatively affected, Ca and Mg showed a slight increase, and Na and Zn were not affected by Se species. Despite the changes in the nutritional balance, Se-enriched lettuce can still be considered a potential dietary source of this essential element.

show abstract

Section: Minerals Accumulation Pca and Theoretical Calculationsmentioning

confidence: 52%

Section: Minerals Accumulation Pca and Theoretical Calculationsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Selenite and Selenate Application on Mineral Composition of Lettuce Plants Cultivated Under Hydroponic Conditions: Nutritional Balance Overview Using a Multifaceted Study

Silva¹,

Cidade²,

Heerdt³

et al. 2017

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…In addition, selenium competition is known to cause a disruption of S metabolism and repressed synthesis of reduced S-containing compounds, such as Cys and GSH. Likewise, the mean shoot and root biomass of Astragali species was significantly reduced when treated with Se and Mo, regardless of whether the species are Se-hyperaccumulator or non-accumulator, with also reduced S assimilation in Se-non-accumulators [48]. …”

Section: Discussionmentioning

confidence: 99%

Can Selenium and Molybdenum Restrain Cadmium Toxicity to Pollen Grains in Brassica napus?

Ismael

Elyamine

Zhao

et al. 2018

IJMS

View full text Add to dashboard Cite

Cadmium (Cd) is highly toxic, even at very low concentrations, to both animals and plants. Pollen is extremely sensitive to heavy metal pollutants; however, less attention has been paid to the protection of this vital part under heavy metal stress. A pot experiment was designed to investigate the effect of foliar application of Se (1 mg/L) and Mo (0.3 mg/L) either alone or in combination on their absorption, translocation, and their impact on Cd uptake and its further distribution in Brassica napus, as well as the impact of these fertilizers on the pollen grains morphology, viability, and germination rate in B. napus under Cd stress. Foliar application of either Se or Mo could counteract Cd toxicity and increase the plant biomass, while combined application of Se and Mo solutions on B. napus has no significant promotional effect on plant root and stem, but reduces the seeds’ weight by 10–11%. Se and Mo have decreased the accumulated Cd in seeds by 6.8% and 9.7%, respectively. Microscopic studies, SEM, and pollen viability tests demonstrated that pollen grains could be negatively affected by Cd, thus disturbing the plant fertility. Se and Mo foliar application could reduce the toxic symptoms in pollen grains when the one or the other was sprayed alone on plants. In an in vitro pollen germination test, 500 μM Cd stress could strongly inhibit the pollen germination rate to less than 2.5%, however, when Se (10 μM) or Mo (1.0 μM) was added to the germination medium, the rate increased, reaching 66.2% and 39.4%, respectively. At the molecular level, Se and Mo could greatly affect the expression levels of some genes related to Cd uptake by roots (IRT1), Cd transport (HMA2 and HMA4), Cd sequestration in plant vacuoles (HMA3), and the final Cd distribution in plant tissue at the physiological level (PCS1).

show abstract

“…Although ABC transporters are present in eukaryotes, ABC-type Mo-specific transporters have not been identified in eukaryotes (Kaiser et al, 2005). Therefore, in eukaryotes, Mo is thought to be transported by other transporters, such as those involved in sulfate and/or phosphate uptake (Heuwinkel et al, 1992;Alhendawi et al, 2005;Shinmachi et al, 2010;DeTar et al, 2015). Mo transporters in Chlamydomonas reinhardtii (MoT1 and MoT2) and Arabidopsis thaliana (AtMOT1 and AtMOT2) were shown to transport Mo with high affinity (Tejada-Jim enez et al, 2007Tomatsu et al, 2007;Baxter et al, 2008;Li et al, 2009;Gasber et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

LjMOT1, a high‐affinity molybdate transporter from Lotus japonicus, is essential for molybdate uptake, but not for the delivery to nodules

et al. 2017

View full text Add to dashboard Cite

Molybdenum (Mo) is an essential nutrient for plants, and is required for nitrogenase activity of legumes. However, the pathways of Mo uptake from soils and then delivery to the nodules have not been characterized in legumes. In this study, we characterized a high-affinity Mo transporter (LjMOT1) from Lotus japonicus. Mo concentrations in an ethyl methanesulfonate-mutagenized line (ljmot1) decreased by 70-95% compared with wild-type (WT). By comparing the DNA sequences of four AtMOT1 homologs between mutant and WT lines, one point mutation was found in LjMOT1, which altered Trp to a stop codon; no mutation was found in the other homologous genes. The phenotype of Mo concentrations in F progeny from ljmot1 and WT crosses were associated with genotypes of LjMOT1. Introduction of endogenous LjMOT1 to ljmot1 restored Mo accumulation to approximately 60-70% of the WT. Yeast expressing LjMOT1 exhibited high Mo uptake activity, and the K was 182 nm. LjMOT1 was expressed mainly in roots, and its expression was not affected by Mo supply or rhizobium inoculation. Although Mo accumulation in the nodules of ljmot1 was significantly lower than that of WT, it was still high enough for normal nodulation and nitrogenase activity, even for cotyledons-removed ljmot1 plants grown under low Mo conditions, in this case the plant growth was significantly inhibited by Mo deficiency. Our results suggest that LjMOT1 is an essential Mo transporter in L. japonicus for Mo uptake from the soil and growth, but is not for Mo delivery to the nodules.

show abstract

Molybdenum accumulation, tolerance and molybdenum–selenium–sulfur interactions in Astragalus selenium hyperaccumulator and nonaccumulator species

Cited by 24 publications

References 27 publications

Effect of Selenite and Selenate Application on Mineral Composition of Lettuce Plants Cultivated Under Hydroponic Conditions: Nutritional Balance Overview Using a Multifaceted Study

Effect of Selenite and Selenate Application on Mineral Composition of Lettuce Plants Cultivated Under Hydroponic Conditions: Nutritional Balance Overview Using a Multifaceted Study

Can Selenium and Molybdenum Restrain Cadmium Toxicity to Pollen Grains in Brassica napus?

LjMOT1, a high‐affinity molybdate transporter from Lotus japonicus, is essential for molybdate uptake, but not for the delivery to nodules

Contact Info

Product

Resources

About