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Silicon enhancement for endorsement of Xanthomonas albilineans infection in sugarcane
Ecotoxicology and Environmental Safety ( IF 6.8 ) Pub Date : 2021-05-28 , DOI: 10.1016/j.ecoenv.2021.112380
Ding-Kai Hong 1 , Javed Talha 1 , Yang Yao 1 , Zhi-Yuan Zou 1 , Hua-Ying Fu 1 , San-Ji Gao 1 , Yuan Xie 1 , Jin-da Wang 1
Affiliation  

Silicon (Si) is considered to be a plant growth and development regulator element as well as provide the regulatory response against various biotic stressors. However, the potential mechanism of Si enhancement to regulate plant disease resistance remains to be studied. Therefore, the current study evaluated the effects of Si application on the performance of sugarcane against Xanthomonas albilineans (Xa) infection. Si was applied exogenously (0, 3.85 and 7.70 g Si/kg soil) and the results show that plant height, stem circumference and leaf width of siliconized sugarcane have been improved, which effectively reduced the disease index (0.17–0.21) and incidence (58.2%−69.1%) after Xa infection. Lowest values of MDA (348.5 nmol g−1 FW) and H2O2 (3539.4 mmol/L) were observed in 7.70 g Si/kg soil followed by in 3.85 g Si/kg soil (MDA: 392.6 nmol g−1 FW and H2O2: 3134.6 mmol/L) than that of the control. Whereas, PAL enzyme activity (50.8 mmol/L), JA (230.2 mmol/L) and SA (2.7 ug mL−1) contents were significantly higher in 7.70 g Si/kg soil followed by in 3.85 g Si/kg soil (PAL: 46.3 mmol/L, JA: 182.7 mmol/L and SA: 2.4 ug mL−1) as compared to control. The lower MDA, H2O2 level and higher enzymatic activities were associated with the highest expression levels of their metabolic pathway associated genes i.e., ShMAPK1, ShLOX, ShPAL, ShAOS, ShAOC, ShC4H, ShCAT, Sh4CL and ShNPR1 (22.08, 15.56, 10.42, 3.35, 2.54, 2.14, 1.82, 1.67 and 1.22 folds, respectively) in 7.70 g Si/kg soil as compared to other experimental units and control. Overall, the results of current study indicates that siliconized sugarcane more actively regulates disease resistance through modulation of growth and MDA, H2O2, SA and JA associated metabolic pathways.



中文翻译:

硅增强以支持甘蔗中的白色黄单胞菌感染

硅 (Si) 被认为是植物生长和发育的调节元素,并提供针对各种生物胁迫的调节反应。然而,Si增强调节植物抗病性的潜在机制仍有待研究。因此,目前的研究评估了施硅对甘蔗对白线黄单胞菌( Xa ) 感染性能的影响。外施硅(0、3.85和7.70 g Si/kg土壤),结果表明硅化甘蔗的株高、茎围和叶宽均有改善,有效降低了病害指数(0.17-0.21)和发病率( 58.2%−69.1%) 在Xa感染后。MDA 的最低值 (348.5 nmol g -1在7.70 g Si / kg土壤中观察到FW)和H 2 O 2(3539.4 mmol / L),然后在3.85 g Si / kg土壤中观察到MD3:392.6 nmol g -1 FW和H 2 O 2:3134.6 mmol / L ) 比控制。而 PAL 酶活性 (50.8 mmol/L)、JA (230.2 mmol/L) 和 SA (2.7 ug mL -1 ) 含量在 7.70 g Si/kg 土壤中显着较高,其次在 3.85 g Si/kg 土壤中 (PAL与对照相比:: 46.3mmol / L,JA:182.7mmol / L和SA:2.4ugmL -1)。较低的 MDA、H 2 O 2水平和较高的酶活性与其代谢途径相关基因的最高表达水平相关,即ShMAPK1, ShLOX , ShPAL, ShAOS, ShAOC , ShC4H , ShCAT, Sh4CLShNPR1 (22.08, 15.56, 10.42, 3.35, 2.54, 2.14, 1.82, 1.67 和 1.22) 与其他实验土壤相比,在 g 7s 的其他土壤中分别为 7 倍的实验性土壤。单位和控制。总体而言,目前的研究结果表明,硅化甘蔗通过调节生长和 MDA、H 2 O 2、SA 和 JA 相关代谢途径更积极地调节抗病性。

更新日期:2021-05-30
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