Assessment of eleven South African peach cultivars for susceptibility to brown rot and blue mould

Gununu, Pascalia R.; Munhuweyi, Karen; Obianom, Chinelo; Sivakumar, Dharini

doi:10.1016/j.scienta.2019.04.067

Cited by 7 publications

(2 citation statements)

References 29 publications

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“…However, the gradual withdrawal of some fungicides driven by concerns about their negative impact on the environment and human health, the constant threat of the emergence of fungicide resistance, and the appearance of novel virulence alleles demonstrate the need for alternative methods for managing brown rot 4 – 6 . Prior to infection, M. laxa can remain latent or quiescent on flowers and fruit surfaces until favorable host factors (i.e., fruit developmental stage 7 ), and environmental factors and other characteristics intrinsic to the stone fruit variety 8 , trigger the disease cycle 9 .…”

Section: Introductionmentioning

confidence: 99%

Depicting the battle between nectarine and Monilinia laxa: the fruit developmental stage dictates the effectiveness of the host defenses and the pathogen’s infection strategies

et al. 2020

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Infections by the fungus Monilinia laxa, the main cause of brown rot in Europe, result in considerable losses of stone fruit. Herein, we present a comprehensive transcriptomic approach to unravel strategies deployed by nectarine fruit and M. laxa during their interaction. We used M. laxa-inoculated immature and mature fruit, which was resistant and susceptible to brown rot, respectively, to perform a dual RNA-Seq analysis. In immature fruit, host responses, pathogen biomass, and pathogen transcriptional activity peaked at 14–24 h post inoculation (hpi), at which point M. laxa appeared to switch its transcriptional response to either quiescence or death. Mature fruit experienced an exponential increase in host and pathogen activity beginning at 6 hpi. Functional analyses in both host and pathogen highlighted differences in stage-dependent strategies. For example, in immature fruit, M. laxa unsuccessfully employed carbohydrate-active enzymes (CAZymes) for penetration, which the fruit was able to combat with tightly regulated hormone responses and an oxidative burst that challenged the pathogen’s survival at later time points. In contrast, in mature fruit, M. laxa was more dependent on proteolytic effectors than CAZymes, and was able to invest in filamentous growth early during the interaction. Hormone analyses of mature fruit infected with M. laxa indicated that, while jasmonic acid activity was likely useful for defense, high ethylene activity may have promoted susceptibility through the induction of ripening processes. Lastly, we identified M. laxa genes that were highly induced in both quiescent and active infections and may serve as targets for control of brown rot.

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Section: Introductionmentioning

confidence: 99%

Depicting the battle between nectarine and Monilinia laxa: the fruit developmental stage dictates the effectiveness of the host defenses and the pathogen’s infection strategies

et al. 2020

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“…Chlorogenic acid, the most abundant representative, was in boundary tissue of infected apple peel up to 6.6-fold higher (INF_CUR_C) compared to healthy tissue. Increasing contents of chlorogenic acid and its derivatives have already been associated with a reduction in the susceptibility of fruit to brown rot infections [49][50][51][52]. Villarino et al [50] reported that chlorogenic acid concentrations, similar to those in peach fruit, does not inhibit spore germination or mycelial growth of fungus M. laxa in culture but inhibits the production of melanin-like pigments in the mycelia of M. laxa in culture (42% melanin reduction).…”

Section: Discussionmentioning

confidence: 99%

Preventive and Curative Effects of Salicylic and Methyl Salicylic Acid Having Antifungal Potential against Monilinia laxa and the Development of Phenolic Response in Apple Peel

Gacnik

Munda

Veberič

et al. 2023

Plants

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The effects of salicylic acid (SA) and one of its better-known derivatives—methyl salicylic acid (MeSA)—on the infection of apple fruits with the fungus Monilinia laxa, which causes brown rot, were investigated. Since research to date has focused on preventive effects, we also focused on the curative use of SA and MeSA. Curative use of SA and MeSA slowed the progression of the infection. In contrast, preventive use was generally unsuccessful. HPLC–MS was used to analyze the content of phenolic compounds in apple peels in healthy and boundary peel tissues around lesions. The boundary tissue around the lesions of untreated infected apple peel had up to 2.2-times higher content of total analyzed phenolics (TAPs) than that in the control. Flavanols, hydroxycinnamic acids and dihydrochalcones were also higher in the boundary tissue. During the curative treatment with salicylates, the ratio of TAP content between healthy and boundary tissue was lower (SA up to 1.2-times higher and MeSA up to 1.3-times higher content of TAPs in boundary compared to those in healthy tissue) at the expense of also increasing the content in healthy tissues. The results confirm that salicylates and infection with the fungus M. laxa cause an increased content of phenolic compounds. Curative use of salicylates has a greater potential than preventive use in infection control.

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The use of preharvest and postharvest treatments with salicylic acid to control brown rot and the response to its infection with the synthesis of phenolic compounds in peach fruit

Gacnik,

Munda,

Veberic

et al. 2024

Hortic. Environ. Biotechnol.

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Assessment of eleven South African peach cultivars for susceptibility to brown rot and blue mould

Cited by 7 publications

References 29 publications

Depicting the battle between nectarine and Monilinia laxa: the fruit developmental stage dictates the effectiveness of the host defenses and the pathogen’s infection strategies

Depicting the battle between nectarine and Monilinia laxa: the fruit developmental stage dictates the effectiveness of the host defenses and the pathogen’s infection strategies

Preventive and Curative Effects of Salicylic and Methyl Salicylic Acid Having Antifungal Potential against Monilinia laxa and the Development of Phenolic Response in Apple Peel

The use of preharvest and postharvest treatments with salicylic acid to control brown rot and the response to its infection with the synthesis of phenolic compounds in peach fruit

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