ArticleNature communications2026
Polyglutamate-loaded chitosan nanogels reprogram plant metabolism for increased growth and viral resistance.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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12 authors.
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Abstract
Asparagine synthetase B (AS-B) is essential for nitrogen metabolism, but its broader physiological functions remain poorly understood. Here we show that the evolutionarily conserved Nicotiana benthamiana NbAS-B confers expression-dependent antiviral resistance and promotes plant growth. Multi-omics analyses indicate that NbAS-B-mediated antiviral immunity relies on glutamate-induced activation of Ca²⁺ signaling through the receptor GLR3.3, whereas its growth-promoting effect results from photosynthetic reprogramming. Building on these insights, we develop polyglutamate-loaded chitosan nanogels (PGANPs) to artificially manipulate this pathway. These nanogels efficiently enter plant tissues and enable sustained in situ release of glutamate, thereby mimicking and amplifying NbAS-B signaling outputs. PGANPs provide long-lasting systemic antiviral immunity while concurrently enhancing plant growth, without incurring metabolic costs. Our work identifies NbAS-B as a dual-function regulator linking metabolic status to immune activation and establishes PGANPs as an eco-friendly, controllable, and durable nanobiotechnology for managing viral diseases in crops.
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