Publications by authors named "Kaiwei He"

The loss and gain of OsNAS3 function both positively influence plant disease resistance. Overexpression of OsNAS3 boosts blast resistance by promoting nicotianamine accumulation, thereby enhancing blast resistance. Conversely, knockout of OsNAS3 increases ethylene biosynthesis, also contributing to improved blast resistance.

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Auxin is an important phytohormone that regulates diverse biologic processes, including plant growth and immunity. Indole-3-acetic acid (IAA), known as one of the main forms of auxin, is able to activate plant immunity. However, it is unknown whether IAA enhances plant resistance and/or suppresses the growth of the fungal pathogen .

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Fungal pathogens typically use secreted effector proteins to suppress host immune activators to facilitate invasion. However, there is rarely evidence supporting the idea that fungal secretory proteins contribute to pathogenesis by transactivating host genes that suppress defense. We previously found that pathogen Magnaporthe oryzae induces rice Bsr-d1 to facilitate infection and hypothesized that a fungal effector mediates this induction.

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Article Synopsis
  • Bsr-d1 is a special gene from a type of rice called Digu that helps the plant fight off a disease called blast, which is caused by a fungus.
  • Researchers found that this gene controls how the plant's cells handle certain chemicals and also helps the plant manage important nutrients.
  • They discovered a new gene named Perox3 that can make the rice more vulnerable to the blast disease if it's too active.
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Broad-spectrum resistance is highly preferred in crop breeding programmes. Previously, we have reported the identification of the broad-spectrum resistance-Digu 1 (bsr-d1) allele from rice Digu. The bsr-d1 allele prevents activation of Bsr-d1 expression by Magnaporthe oryzae infection and degradation of H O by peroxidases, leading to resistance to M.

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In this article, we introduce a pH-responsive charge-reversible and photo-crosslinkable polymer nanoparticle. It is prepared typical self-assembly from a block copolymer poly((7-(4-vinyl-benzyloxyl)-4-methylcoumarin)-co-acrylicacid)-b-poly((2-dimethylamino) ethyl methacrylate)-co-styrene) (P(VBMC-co-AA)-b-P(DMAEMA-co-St)), whose two blocks have different ionizable moieties. In an aqueous solution of pH ≤ 4, the cationic polymer nanoparticles are formed due to the fully protonated PDMAEMA.

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Stimuli-responsive polymeric systems containing special responsive moieties can undergo alteration of chemical structures and physical properties in response to external stimulus. We synthesized a hybrid amphiphilic block copolymer containing methoxy polyethylene glycol (MePEG), methacrylate isobutyl polyhedral oligomeric silsesquioxane (MAPOSS) and 2-(diisopropylamino)ethyl methacrylate (DPA) named MePEG--P(MAPOSS--DPA) via atom transfer radical polymerization (ATRP). Spherical micelles with a core-shell structure were obtained by a self-assembly process based on MePEG--P(MAPOSS--DPA), which showed a pH-responsive property.

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A series of novel azobenzene-based amphiphilic random copolymers P(POSSMA--AZOMA--DMAEMA) were synthesized reversible addition-fragmentation chain transfer (RAFT) polymerization. A light and reduction dual-responsive azo group, pH-responsive tertiary amine group and super hydrophobic POSS moiety were incorporated into the polymer chain to generate multi-stimuli-responsiveness. Self-assembly of these amphiphilic copolymers led to the formation of spherical micelles in aqueous solution.

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