Methods of protecting plants from pathogens
AssigneeRedox Chemicals, Inc.
InventorsDarin J. Moon, Anne J. Anderson
Life of this patent
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Abstract
This invention provides novel methods for improving plant quality and yield in the presence of pathogens. The method increases the levels of pathogenesis-related proteins, such as PR1, phenylalanine ammonia lyase, or plant cell wall proteins such as hydroxyproline-rich glycoproteins, in a plant by contacting the plant with a plant systemic inducer and a reactive oxygen species wherein the amount of the reactive oxygen species is sufficient to increase the amount of the pathogenesis-related protein above the level induced by the plant systemic inducer in the absence of the reactive oxygen species. A preferred reactive oxygen species is peracetic acid; a preferred plant systemic inducer is salicylic acid.
Claims46
A method of increasing disease resistance in a plant by increasing transcription of a gene encoding a protein selected from the group consisting of:
- a pathogenesis-related protein, phenylalanine ammonia lyase, chalcone synthase, and a hydroxyproline-rich glycoprotein, said method comprising contacting the plant with a plant systemic inducer and a reactive oxygen species, wherein the increase in disease resistance is greater than that caused by either the plant systemic inducer or the reactive oxygen species in the absence of the other.
A method of increasing, in a plant, transcription of a gene encoding a protein selected from the group consisting of:
- a pathogenesis-related protein, phenylalanine ammonia lyase, chalcone synthase, and a hydroxyproline-rich glycoprotein, comprising the step of contacting foliage of the plant with a plant systemic inducer and a reactive oxygen species wherein the amount of reactive oxygen species is sufficient to increase the level of transcription of said pathogenesis-related protein, phenylalanine ammonia lyase, chalcone synthase, or said hydroxyproline-rich glycoprotein above the level induced by the plant systemic inducer in the absence of the reactive oxygen species.
A method of increasing, in a plant, transcription of a protein selected from the group consisting of:
- a pathogenesis-related protein, phenylalanine ammonia lyase, and a hydroxyproline-rich glycoprotein, comprising the step of contacting foliage of the plant with a plant systemic inducer and a reactive oxygen species wherein the amount of systemic inducer is sufficient to increase the level of transcription of said pathogenesis-related protein, phenylalanine ammonia lyase, or said hydroxyproline-rich glycoprotein above the level induced by the reactive oxygen species in the absence of the plant systemic inducer.
A method of increasing, in a plant, transcription of a protein selected from the group consisting of:
- a pathogenesis-related protein, phenylalanine ammonia lyase, and a hydroxyproline-rich glycoprotein, comprising the step of contacting roots of the plant with a plant systemic inducer and a reactive oxygen species wherein the amount of systemic inducer is sufficient to increase the level of transcription of said pathogenesis-related protein, phenylalanine ammonia lyase, or said hydroxyproline-rich glycoprotein above the level induced by the reactive oxygen species in the absence of the plant systemic inducer, provided that the composition does not comprise an agent selected from the group comprising a cation redox reducing agent and a divalent cation having redox potential in amounts sufficient to reduce the levels of microorganisms in soil around the roots by 40% or more.
Dependencies are inferred from the claim text.