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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Seed priming with calcium compounds abrogate fluoride-induced oxidative stress by upregulating defence pathways in an indica rice variety
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Seed priming with calcium compounds abrogate fluoride-induced oxidative stress by upregulating defence pathways in an indica rice variety

机译:通过籼稻品种中的防御途径上调防御途径,用钙化合物进行氟化物诱导的氧化应激的种子引发

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The aim of this manuscript was to investigate the role of calcium compounds, viz., Ca(OH)(2), Ca(NO3)(2), and CaCl2 (each used at 0.3 mM and 0.5 mM concentration) as seed priming agents to ameliorate fluoride toxicity in rice. The stressed seedlings exhibited high fluoride bioaccumulation, severe growth retardation, and cellular damages. Calcium compounds improved plant performance by increasing seed germination, seedling biomass, and root and shoot length, avoiding chlorophyll degeneration and leakage of electrolytes, along with lowering the levels of malondialdehdye, H2O2, and endogenous fluoride. Calcium-regulated defence was mediated by proline synthesised due to increased Delta(1)-pyrroline 5-carboxylate synthetase (P5CS) and lowered proline dehydrogenase (PDH) expression, and glycine betaine synthesised due to betaine aldehyde dehydrogenase 1 (BADH1) expression. While the stress-mediated lowering of carotenoids and total phenolics was relieved by calcium priming, stress-enhanced flavonoids and ascorbic acid content was restored to the normal condition, along with releasing the fluoride-induced inhibition of ascorbic acid oxidase (AAO) activity. The activities of antioxidant enzymes like catalase, guaiacol peroxidase, and superoxide dismutase, and the expression of catalase and superoxide dismutase genes were also affected by calcium priming. The elevated endogenous calcium level, brought about by priming, enhanced the expression of genes related to calcium signalling pathway, particularly the calcineurin-B-like 10 (CBL10) gene. Ca(OH)(2) (0.3 mM) appeared to be the most efficient of all the three priming agents. Overall, the present work highlighted the efficacy of calcium compounds as priming agents in abrogating fluoride toxicity in rice.
机译:该稿件的目的是探讨钙化合物,ZiZ。,Ca(OH)(2),Ca(2)和CaCl 2(每个以0.3mm和0.5mm浓度使用)的作用作为种子引发剂改变水稻中的氟化物毒性。压力幼苗表现出高氟化物生物累积,严重的生长延迟和细胞损伤。通过增加种子萌发,幼苗生物量和根部和芽长度,避免叶绿素变性和电解质泄漏,钙化化合物改善了植物性能,以及降低丙二醛,H2O2和内源氟的水平。由于δ-吡咯啉5-羧酸酯合成酶(P5Cs)和降低的脯氨酸脱氢酶(PDH)表达,并且由于甜菜碱醛脱氢酶1(BADH1)表达,糖苷脱氢酶(P5C)表达和降低的脯氨酸脱氢酶(PDH)表达而被脯氨酸介导。虽然通过钙引发缓解了应激介导的类胡萝卜素和总酚类的降低,但恢复应激增强的黄酮和抗坏血酸含量,以及释放氟化物诱导的抗坏血酸氧化酶(AAO)活性的抑制作用。钙灌注的抗氧化酶等抗氧化酶等抗氧化酶及过氧化氢酶和超氧化物歧化酶基因的表达也受钙灌注。通过引发引起的升高的内源性钙水平,增强了与钙信号通路相关的基因的表达,特别是钙碱-B样10(CBL10)基因。 Ca(OH)(2)(0.3mm)似乎是所有三种引发剂中最有效的。总的来说,本作突出了钙化合物作为初步氟化物中氟化物毒性引发剂的疗效。

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