Molybdate toxicity in Chinese cabbage is not the direct consequence of changes in sulphur metabolism
| العنوان: | Molybdate toxicity in Chinese cabbage is not the direct consequence of changes in sulphur metabolism |
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| المؤلفون: | C. E. E. Stuiver, Dharmendra H. Prajapati, Erica Zuidersma, L.J. De Kok, Malcolm J. Hawkesford, Ties Ausma |
| المساهمون: | Verhulst lab, Elzenga lab, De Kok lab |
| المصدر: | Plant Biology (Stuttgart, Germany) Plant Biology, 22(2), 331-336. Wiley-Blackwell |
| بيانات النشر: | John Wiley and Sons Inc., 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 0106 biological sciences, EXPRESSION, EXCESS MOLYBDENUM, sulphate uptake, Plant Science, Brassica, sulphate assimilation, Molybdate, Biology, Sulphate assimilation, 010603 evolutionary biology, 01 natural sciences, REDUCTASE, chemistry.chemical_compound, Nitrate, Soil Pollutants, SELENATE, Food science, TOLERANCE, EXPOSURE, ATP SULFURYLASE, heavy metals, Ecology, Evolution, Behavior and Systematics, ACCUMULATION, Molybdenum, SULFATE TRANSPORTERS, Chlorosis, General Medicine, Metabolism, Research Papers, chemistry, Heavy metals, Seedlings, Shoot, Toxicity, Composition (visual arts), Phytotoxicity, ATMOSPHERIC H2S, Sulphate uptake, Sulfur, 010606 plant biology & botany, Research Paper |
| الوصف: | In polluted areas, plants may be exposed to supra‐optimal levels of the micronutrient molybdenum. The physiological basis of molybdenum phytotoxicity is poorly understood. Plants take up molybdenum as molybdate, which is a structural analogue of sulphate. Therefore, it is presumed that elevated molybdate concentrations may hamper the uptake and subsequent metabolism of sulphate, which may induce sulphur deficiency.In the current research, Chinese cabbage (Brassica pekinensis) seedlings were exposed to 50, 100, 150 and 200 μm Na2MoO4 for 9 days.Leaf chlorosis and a decreased plant growth occurred at concentrations ≥100 μm. Root growth was more affected than shoot growth. At ≥100 μm Na2MoO4, the sulphate uptake rate and capacity were increased, although only when expressed on a root fresh weight basis. When expressed on a whole plant fresh weight basis, which corrects for the impact of molybdate on the shoot‐to‐root ratio, the sulphate uptake rate and capacity remained unaffected. Molybdate concentrations ≥100 μm altered the mineral nutrient composition of plant tissues, although the levels of sulphur metabolites (sulphate, water‐soluble non‐protein thiols and total sulphur) were not altered. Moreover, the levels of nitrogen metabolites (nitrate, amino acids, proteins and total nitrogen), which are generally strongly affected by sulphate deprivation, were not affected. The root water‐soluble non‐protein thiol content was increased, and the tissue nitrate levels decreased, only at 200 μm Na2MoO4.Evidently, molybdenum toxicity in Chinese cabbage was not due to the direct interference of molybdate with the uptake and subsequent metabolism of sulphate. Exposure to excessive molybdate may constrain plant growth. It is presumed that elevated molybdate concentrations may hamper the uptake and subsequent metabolism of sulfate, which may induce sulfur deficiency. However, our research showed that in Chinese cabbage molybdate toxicity was not due to the direct interference of molybdate with the uptake and subsequent metabolism of sulfate. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1438-8677 1435-8603 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8939bbdd51f323bc4344b61ac72fe4f5Test http://europepmc.org/articles/PMC7065239Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....8939bbdd51f323bc4344b61ac72fe4f5 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14388677 14358603 |
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