Dynamics of Pathogenic Fungi in Field Hedges: Vegetation Cover Is Differentially Impacted by Weather
Landscape effects might impede or increase spore dispersal and disease risk for crops, as trees and hedges buffer winds and can behave as spore traps, therefore limiting diffusion of fungi, or, on the contrary, behave as disease relay once vegetation is infected and become inoculum sources. In this...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Microorganisms |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-2607/10/2/400 |
| _version_ | 1797477775890710528 |
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| author | Pauline Dentika Harry Ozier-Lafontaine Laurent Penet |
| author_facet | Pauline Dentika Harry Ozier-Lafontaine Laurent Penet |
| author_sort | Pauline Dentika |
| collection | DOAJ |
| description | Landscape effects might impede or increase spore dispersal and disease risk for crops, as trees and hedges buffer winds and can behave as spore traps, therefore limiting diffusion of fungi, or, on the contrary, behave as disease relay once vegetation is infected and become inoculum sources. In this study, we investigated weekly prevalence of the pathogenic fungus <i>Colletotrichum</i> <i>gloeosporioides</i> on guava tree leaves, differentiating impacts of leaf height on tree, age, and location within leaf. We first estimated differences in prevalence for each covariate, and then related infection rates to weather effects during the year. Our results highlighted a great variance of prevalence among individual trees, and a lower contamination of tree tops, as well as a tendency for greater odds of infection in tips of young leaves compared to older ones. Last, we show evidence that individual tree contaminations are associated with different disease dynamics: early and dispersal-based, late and growth-based, as well as with intermediate dynamic ranges. Pathogen infection dynamics will thus be greatly impacted by cover characteristics at local scale, and tree cover should not be perceived as homogeneously driving disease levels. |
| first_indexed | 2024-03-09T21:23:27Z |
| format | Article |
| id | doaj.art-2cc81cb9f92d434e88e98f751bf15d15 |
| institution | Directory Open Access Journal |
| issn | 2076-2607 |
| language | English |
| last_indexed | 2024-03-09T21:23:27Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Microorganisms |
| spelling | doaj.art-2cc81cb9f92d434e88e98f751bf15d152023-11-23T21:15:35ZengMDPI AGMicroorganisms2076-26072022-02-0110240010.3390/microorganisms10020400Dynamics of Pathogenic Fungi in Field Hedges: Vegetation Cover Is Differentially Impacted by WeatherPauline Dentika0Harry Ozier-Lafontaine1Laurent Penet2INRAE, UR1321 ASTRO Agrosystèmes Tropicaux, 97170 Petit-Bourg, Guadeloupe, FranceINRAE, UR1321 ASTRO Agrosystèmes Tropicaux, 97170 Petit-Bourg, Guadeloupe, FranceINRAE, UR1321 ASTRO Agrosystèmes Tropicaux, 97170 Petit-Bourg, Guadeloupe, FranceLandscape effects might impede or increase spore dispersal and disease risk for crops, as trees and hedges buffer winds and can behave as spore traps, therefore limiting diffusion of fungi, or, on the contrary, behave as disease relay once vegetation is infected and become inoculum sources. In this study, we investigated weekly prevalence of the pathogenic fungus <i>Colletotrichum</i> <i>gloeosporioides</i> on guava tree leaves, differentiating impacts of leaf height on tree, age, and location within leaf. We first estimated differences in prevalence for each covariate, and then related infection rates to weather effects during the year. Our results highlighted a great variance of prevalence among individual trees, and a lower contamination of tree tops, as well as a tendency for greater odds of infection in tips of young leaves compared to older ones. Last, we show evidence that individual tree contaminations are associated with different disease dynamics: early and dispersal-based, late and growth-based, as well as with intermediate dynamic ranges. Pathogen infection dynamics will thus be greatly impacted by cover characteristics at local scale, and tree cover should not be perceived as homogeneously driving disease levels.https://www.mdpi.com/2076-2607/10/2/400<i>Colletotrichum gloeosporioides</i>field hedges<i>Psidium guajava</i>disease dynamicsbarrier effectleaf age |
| spellingShingle | Pauline Dentika Harry Ozier-Lafontaine Laurent Penet Dynamics of Pathogenic Fungi in Field Hedges: Vegetation Cover Is Differentially Impacted by Weather Microorganisms <i>Colletotrichum gloeosporioides</i> field hedges <i>Psidium guajava</i> disease dynamics barrier effect leaf age |
| title | Dynamics of Pathogenic Fungi in Field Hedges: Vegetation Cover Is Differentially Impacted by Weather |
| title_full | Dynamics of Pathogenic Fungi in Field Hedges: Vegetation Cover Is Differentially Impacted by Weather |
| title_fullStr | Dynamics of Pathogenic Fungi in Field Hedges: Vegetation Cover Is Differentially Impacted by Weather |
| title_full_unstemmed | Dynamics of Pathogenic Fungi in Field Hedges: Vegetation Cover Is Differentially Impacted by Weather |
| title_short | Dynamics of Pathogenic Fungi in Field Hedges: Vegetation Cover Is Differentially Impacted by Weather |
| title_sort | dynamics of pathogenic fungi in field hedges vegetation cover is differentially impacted by weather |
| topic | <i>Colletotrichum gloeosporioides</i> field hedges <i>Psidium guajava</i> disease dynamics barrier effect leaf age |
| url | https://www.mdpi.com/2076-2607/10/2/400 |
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