The molecular mechanisms of silica nanomaterials enhancing the rice (Oryza sativa L.) resistance to planthoppers (Nilaparvata lugens Stal)
The molecular mechanisms of silica nanomaterials enhancing the rice (Oryza sativa L.) resistance to planthoppers (Nilaparvata lugens Stal)
复制标题
二氧化硅纳米材料增强水稻（Oryza sativa L.）抗飞虱（Nilaparvata lugens Stal）的分子机制
DOI：
10.1016/j.scitotenv.2021.144967
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发表时间：
2021-02-05
影响因子：
9.8
通讯作者：
Xing, Baoshan
中科院分区：
文献类型：
--
作者：
Cheng, Bingxu;Chen, Feiran;Xing, Baoshan
本文合成了荧光SiO2（F-SiO2）ENMs（50 nm），与硅离子肥料相比，在水培条件下，F-SiO2 ENMs可从水稻根吸收并转移到地上部，促进植株生长和抗稻飞虱。特别是5 mg.L-1的F-SiO2 ENMs处理9 d后，地上部鲜重、干重、根长、表面积和根尖数分别增加33.58%、6522%、1526%、2026%和29.01%。在有飞虱存在的情况下，地上部鲜重和干重仍分别增加了61.88%和114.75%。F-SiO_2 ENMs处理（5 mg·L ~（-1））后，茎中木质素含量增加30.13%，并形成硅细胞，可作为稻飞虱的机械屏障。转录组数据显示，F-SiO2 ENMs可上调植物-病原菌互作、植物激素信号转导、葡萄糖代谢和碳固定途径相关基因的表达，促进水稻幼苗的生长和抗性。我们的研究结果为SiO2纳米材料增强水稻对稻飞虱抗性的分子机制提供了初步证据。(C)2021爱思唯尔有限公司版权所有。
Herein, fluorescent silica (F-SiO2) ENMs (50 nm) were synthesized, which could be taken up and translocated from rice root to shoot, promoting the plant growth and resistance to planthopper compared with Si ion fertilizers under hydroponic conditions. Particularly, upon exposure F-SiO2 ENMs (5 mg.L-1) suspension for 9 days, the fresh and dry weight (FW and DW) of shoot, the root length, surface area, and tip number were increased by 33.58%, 6522%, 1526%, 2026% and 29.01%, respectively. Notably, in the presence of planthopper, the shoot FW and DW still increased by 61.88% and 114.75%, respectively. The increased lignin content (by 30.13%) and formation of silica cells in stem after F-SiO2 ENMs exposure (5 mg.L-1) could be mechanical barriers against planthoppers. The transcriptome data revealed that F-SiO2 ENMs could upregulate the expression of genes involved in plant-pathogen interactions, plant hormone signal transduction, glucose metabolism and carbon fixation pathway, promoting the growth and resistance of rice seedlings. Our findings provide first evidence for the underlying molecular mechanisms of SiO2 ENMs enhancing the rice resistance to planthopper. (C) 2021 Elsevier B.V. All rights reserved.