Does increased nutritional carbon availability in fruit and foliar hosts contribute to modulation of pathogen colonization?

Dov B. Prusky, Richard A. Wilson

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

High losses due to postharvest pathogens call for an understanding of the processes modulating fungal colonization in comparison to leaf pathogens. Pathogens can penetrate fruit and foliar plants directly through the cuticle following the development of appressoria, or through wounds during fruit growth and postharvest life. In both cases, disease symptoms may not occur until long after infection. Maturation (when plant or fruit has attained maximum growth and size) and ripening (the process by which mature fruit become ready for consumption) are critical factors in fruit susceptibility to postharvest pathogens. During these periods, fruit undergo physiological and metabolic changes that affect nutritional composition and cause a decline in resistance mechanisms. Recent research suggests that host nutrients during ripening may modulate signaling processes in the pathogen that lead to metabolic responses, triggering the accumulation of pH-modulating molecules. The pH shift in the surrounding host tissue induces optimal gene-expression conditions for the fungus to use specific pathogenicity factors at each particular pH. Leaf pathogens usually penetrate via appressoria and also respond to carbon-regulation signaling. This review describes our understanding of the importance of carbon regulation in fruit and leaf tissue, and its contribution to pathogen colonization via facilitation of the transition from quiescent to necrotrophic lifestyle.

Original languageEnglish (US)
Pages (from-to)27-32
Number of pages6
JournalPostharvest Biology and Technology
Volume145
DOIs
StatePublished - Nov 2018

Fingerprint

Nutritive Value
Fruit
Carbon
fruits
pathogens
carbon
appressoria
ripening
leaves
plant damage
Virulence Factors
Growth
resistance mechanisms
signs and symptoms (plants)
lifestyle
Life Style
Fungi
pathogenicity
Gene Expression
Food

Keywords

  • Colonization
  • Foliar susceptibility
  • Fruit ripening
  • Fruit susceptibility
  • Pathogenicity

ASJC Scopus subject areas

  • Food Science
  • Agronomy and Crop Science
  • Horticulture

Cite this

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title = "Does increased nutritional carbon availability in fruit and foliar hosts contribute to modulation of pathogen colonization?",
abstract = "High losses due to postharvest pathogens call for an understanding of the processes modulating fungal colonization in comparison to leaf pathogens. Pathogens can penetrate fruit and foliar plants directly through the cuticle following the development of appressoria, or through wounds during fruit growth and postharvest life. In both cases, disease symptoms may not occur until long after infection. Maturation (when plant or fruit has attained maximum growth and size) and ripening (the process by which mature fruit become ready for consumption) are critical factors in fruit susceptibility to postharvest pathogens. During these periods, fruit undergo physiological and metabolic changes that affect nutritional composition and cause a decline in resistance mechanisms. Recent research suggests that host nutrients during ripening may modulate signaling processes in the pathogen that lead to metabolic responses, triggering the accumulation of pH-modulating molecules. The pH shift in the surrounding host tissue induces optimal gene-expression conditions for the fungus to use specific pathogenicity factors at each particular pH. Leaf pathogens usually penetrate via appressoria and also respond to carbon-regulation signaling. This review describes our understanding of the importance of carbon regulation in fruit and leaf tissue, and its contribution to pathogen colonization via facilitation of the transition from quiescent to necrotrophic lifestyle.",
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AB - High losses due to postharvest pathogens call for an understanding of the processes modulating fungal colonization in comparison to leaf pathogens. Pathogens can penetrate fruit and foliar plants directly through the cuticle following the development of appressoria, or through wounds during fruit growth and postharvest life. In both cases, disease symptoms may not occur until long after infection. Maturation (when plant or fruit has attained maximum growth and size) and ripening (the process by which mature fruit become ready for consumption) are critical factors in fruit susceptibility to postharvest pathogens. During these periods, fruit undergo physiological and metabolic changes that affect nutritional composition and cause a decline in resistance mechanisms. Recent research suggests that host nutrients during ripening may modulate signaling processes in the pathogen that lead to metabolic responses, triggering the accumulation of pH-modulating molecules. The pH shift in the surrounding host tissue induces optimal gene-expression conditions for the fungus to use specific pathogenicity factors at each particular pH. Leaf pathogens usually penetrate via appressoria and also respond to carbon-regulation signaling. This review describes our understanding of the importance of carbon regulation in fruit and leaf tissue, and its contribution to pathogen colonization via facilitation of the transition from quiescent to necrotrophic lifestyle.

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