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首页> 外文期刊>Silicon >Root Silicon Treatment Modulates the Shoot Transcriptome inBrassica napusL. and in Particular Upregulates Genes Related to Ribosomes and Photosynthesis
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Root Silicon Treatment Modulates the Shoot Transcriptome inBrassica napusL. and in Particular Upregulates Genes Related to Ribosomes and Photosynthesis

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摘要

While the benefit of silicon (Si) is often reported in cultivated plants, and particularly in those experiencing stress conditions, the underlying mechanisms are poorly described and controversial 1. For a long time the mechanical role of Si in the cell wall has been considered as the main explanation for its beneficial effects in alleviating plant stresses. Another assumption is that a low proportion (around 1) of the Si taken up by plants might modulate some metabolic pathways. Investigating this concept, Haddad et al. 2 demonstrated that in roots ofBrassica napusplants, the modulation of a large range of genes by Si could explain an increased resistance to nitrogen (N) deficiency. However, since the Si benefit is mainly associated with maintaining photosynthetic activity and a delay in leaf senescence in the mature leaves of plants cultivated under N- deficiency 3, the aim of the present study was to identify (using a RNA sequencing approach) the transcriptomic modifications in the shoot compartment of +Si plants. Our results showed that there were 296 genes differentially expressed genes (DEGs)) in shoots ofBrassica napustreated with Si (root supply 1.7 mM for 7 days). Among these genes, 19 and 31 upregulated genes were related to ribosomes and photosynthetic pathways, respectively. From these results, the assumption that a Si supply can facilitate efficient metabolic reinforcement and alleviate the biotic and abiotic stresses experienced by plants is discussed.

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