Subcellular distribution of molybdenum, ultrastructural and antioxidative responses in soybean seedlings under excess molybdenum stress

Xu, Shoujun; Hu, Chengxiao; Tan, Qiling; Qin, Shiyu; Sun, Xu

doi:10.1016/j.plaphy.2017.11.023

Cited by 24 publications

(15 citation statements)

References 27 publications

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“…Generally, plant Mo concentrations are correlated positively with Mo levels in the plant growth substrate [42,43]. In our experiment, root Mo concentrations and shoot Mo concentrations in mycorrhizal plants showed positive correlations with soil Mo concentrations ( Table 2).…”

Section: Mo Concentrations and Uptake In Plant Tissuessupporting

confidence: 54%

Arbuscular Mycorrhizal Fungi Improve the Performance of Sweet Sorghum Grown in a Mo-Contaminated Soil

Shi

Zhang

et al. 2020

JoF

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Arbuscular mycorrhizal fungi are among the most ubiquitous soil plant-symbiotic fungi in terrestrial environments and can alleviate the toxic effects of various contaminants on plants. As an essential micronutrient for higher plants, molybdenum (Mo) can cause toxic effects at excess levels. However, arbuscular mycorrhizal fungal impacts on plant performance and Mo accumulation under Mo-contamination still require to be explored. We first studied the effects of Claroideoglomus etunicatum BEG168 on plant biomass production and Mo accumulation in a biofuel crop, sweet sorghum, grown in an agricultural soil spiked with different concentrations of MoS2. The results showed that the addition of Mo produced no adverse effects on plant biomass, N and P uptake, and root colonization rate, indicating Mo has no phytotoxicity and fungitoxicity at the test concentrations. The addition of Mo did not increase and even decreased S concentrations in plant tissues. Arbuscular mycorrhizal inoculation significantly enhanced plant biomass production and Mo concentrations in both shoots and roots, resulting in increased Mo uptake by mycorrhizal plants. Overall, arbuscular mycorrhizal inoculation promoted the absorption of P, N and S by sweet sorghum plants, improved photosystem (PS) II photochemical efficiency and comprehensive photosynthesis performance. In conclusion, MoS2 increased Mo accumulation in plant tissues but produced no toxicity, while arbuscular mycorrhizal inoculation could improve plant performance via enhancing nutrient uptake and photochemical efficiency. Sweet sorghum, together with arbuscular mycorrhizal fungi, shows a promising potential for phytoremediation of Mo-contaminated farmland and revegetation of Mo-mine disturbed areas, as well as biomass production on such sites.

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Section: Mo Concentrations and Uptake In Plant Tissuessupporting

confidence: 54%

Arbuscular Mycorrhizal Fungi Improve the Performance of Sweet Sorghum Grown in a Mo-Contaminated Soil

Shi

Zhang

et al. 2020

JoF

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“…Generally, Mo concentrations in maize plants increased gradually with the increasing levels of Mo added to the growth substrate. 27,28 Differently, our present study showed plant Mo concentrations did not increase with the increasing Mo addition levels, suggesting the existence of an active defense mechanism that prevents excess Mo into the root. Similarly, Mo accumulated in the Ophioglossum plant against a concentration gradient and reached a nal concentration of the element which signicantly exceeded the soil soluble Mo concentration.…”

Section: Plant Growth Leaf Photosynthesis and Transpiration And Mo contrasting

confidence: 51%

“…Excess Mo causes toxic effects in plants, such as alteration of morphology, cell structures and physiological responses. 27,28 However, the toxicity threshold values of Mo greatly varied with soil properties and plant species, with a wide range of added Mo concentrations generating 50% inhibition of plant growth (ED 50 ) among the surveyed 10 soils, ranging from less than 1 mg kg À1 to higher than several thousand mg kg À1 , and ryegrass showed higher resistance to Mo toxicity than other three crops (oilseed rape, red clover, and tomato). 29 In the present study, the added Mo caused plant growth reduction in most cases, suggesting a phytotoxic effect on maize grown in the studied soil.…”

Section: Plant Growth Leaf Photosynthesis and Transpiration And Mo mentioning

confidence: 99%

Arbuscular mycorrhizal inoculation increases molybdenum accumulation but decreases molybdenum toxicity in maize plants grown in polluted soil

et al. 2018

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“…Even for soybean "GR" is acceptable and proven that the herbicide causes problems related to physiological parameters, the level of crop injury can be attributed to herbicide dose, genotype and application conditions (Zobiole et al, 2011;Merotto et al, 2015, Fan et al, 2017, Krenchinski et al, 2017. However, the nutrients phytotoxicity may be related to the concentration and demand actions that maintain the homeostasis of these nutrients in the plants, causing physiological changes (Santos et al, 2017;Xu et al, 2018). In all the treatments contrasts in which glyphosate was applied in mixture with foliar fertilizers or alone (contrasts 5, 6, 7 and 8) there was a higher phytotoxicity when compared to the isolated application of foliar fertilizers (Figure 1).…”

Section: Phytotoxicity In Gr Soybean Upon Application Of Glyphosate Amentioning

confidence: 99%

“…Sfredo and Oliveira (2010) reported that applying micronutrients like molybdenum and cobalt, can increase the BNF and foliar applications of Mo resulted in increased Mo content in soybean seeds (Campo et al, 2009). When excessive, this element is stored mainly in the soluble fraction or bound to the cell wall fraction, preventing translocation to the leaves and maintaining the Mo homeostasis (Xu et al, 2018). Micronutrients such as manganese (Mn) stand out more for their phytotoxicity due to their high concentration than deficiency problems, their high concentration can provide reduction in the photosynthetic rate and reduction in the dry matter of soybean plants (Santos et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Effects of glyphosate and foliar fertilizers on the glyphosate resistant (GR) soybean

Forte

Menegat²,

Galon

et al. 2019

Aust J Crop Sci

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Currently the soybean crop is responsible for a great share of the protein consumed by humans and animals, it is also a source of oil and renewable materials for the industry. Due to the importance of soybeans worldwide, especially genetically modified soybeans (resistant to glyphosate - GR), the improvement in yield indexes became the targets of promising research. The objective of this work was to evaluate the responses of the “GR” soybean crop as a function of glyphosate herbicide and foliar fertilizer, under soil without nutrient deficiency. The experiment was conducted in a randomized block design with four replications, consisted of two factors. Factor A was consisted by glyphosate (1080 and 2160 g a.e ha-1) and factor B by foliar fertilizers (Fertilizer A – Mg= 5%, Mn= 0,5%, Mo= 0.5%, L-Glutamic acid= 5% and glycine betaine 3%; Fertilizer B - Zn (5%), Mn (3%), Cu (0,5%), B (0.5%) and S (4%); Fertilizer C - Mo and L-Glutamic acid). The treatments were applied isolated and in mixtures, plus the control treatment, totalizing 21 treatments. The variables evaluated were phytotoxicity at 14 and 21 DAT, a thousand-grain weight and grain yield. The analysis of variance was performed and, when significant, the comparison of groups of treatments using orthogonal contrasts was applied to all variables. Soybean yield was also compared to the means of the treatments by the Scott-Knott test (p≤0.05). Phytotoxicity was detected in the soybean crop at 14 DAT with the application of glyphosate, foliar fertilizers and the association of the two products. However, only the highest dose of glyphosate, with or without foliar fertilizers, generally reduced crop grain yield. In addition, the application of foliar fertilizers isolated and associated with glyphosate, in soils with adequate levels of nutrients, does not increase thousand-grain weight or grain. It is concluded that the glyphosate dose for soybeans should be respected and foliar fertilizers should be carefully studied before recommendation.

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Subcellular distribution of molybdenum, ultrastructural and antioxidative responses in soybean seedlings under excess molybdenum stress

Cited by 24 publications

References 27 publications

Arbuscular Mycorrhizal Fungi Improve the Performance of Sweet Sorghum Grown in a Mo-Contaminated Soil

Arbuscular Mycorrhizal Fungi Improve the Performance of Sweet Sorghum Grown in a Mo-Contaminated Soil

Arbuscular mycorrhizal inoculation increases molybdenum accumulation but decreases molybdenum toxicity in maize plants grown in polluted soil

Effects of glyphosate and foliar fertilizers on the glyphosate resistant (GR) soybean

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