Root morphology, gas exchange and chlorophyll fluorescence of coffee cultivars and progenies are altered by Meloidogyne paranaensis infestation and water deficit

Root morphology, gas exchange and chlorophyll fluorescence of coffee cultivars and progenies are altered by Meloidogyne paranaensis infestation and water deficit

Climate change greatly influences coffee production, especially in areas infested with plant‐parasitic nematodes. In this study, coffee genotypes showed differences in their morphological and physiological characteristics when subjected to a water deficit and parasitism by Meloidogyne paranaensis. T...

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Bibliographic Details
Published in:Journal of phytopathology Vol. 168; no. 4; pp. 220 - 227
Main Authors: Pasqualotto, Alan Teixeira, Salgado, Sônia Maria de Lima, Terra, Willian César, Fatobene, Bárbhara Joana dos Reis, Silveira, Helbert Rezende de Oliveira, Santos, Meline Oliveira, Campos, Vicente Paulo, Silva, Vânia Aparecida
Format: Journal Article
Language:English
Published: Berlin Wiley Subscription Services, Inc 01-04-2020
Subjects:
Chlorophyll
Climate change
Coffea arabica
Coffee
Cultivars
Drought
Fluorescence
Gas exchange
Genotypes
Infestation
Meloidogyne paranaensis
Morphology
Nematodes
Parasitism
Photochemicals
Photosystem II
Physical characteristics
physiology
Quenching
Reduction
Sensitivity
Surface area
Water deficit
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Summary:Climate change greatly influences coffee production, especially in areas infested with plant‐parasitic nematodes. In this study, coffee genotypes showed differences in their morphological and physiological characteristics when subjected to a water deficit and parasitism by Meloidogyne paranaensis. The cultivar IPR 100 had the largest superficial and volumetric root system area, even when parasitized. The two progenies (MG 0179‐1 and MG 0179‐3) and the cultivar Catuaí IAC 62 had a similar surface area (p < .05) when parasitized. However, the root surface area and volume of MG 0179‐3 increased by 96% and 400%, respectively, when parasitized by M. paranaensis. On the other hand, Catuaí IAC 62 had a 31% reduction in root surface area. Catuai 62 and IPR 100 showed higher sensitivity to drought when parasitized because of the increased photochemical sensitivity and reduction in photochemical quenching. In MG 0179‐1 and MG 0179‐3, an increase in non‐photochemical quenching occurred in response to stress, indicating that these progenies use a photochemical response to protect photosystem II. In this work, MG 0179‐3, which is resistant to M. paranaensis, was remarkable because, interestingly, the infestation caused an increase in its root surface area. In addition, MG 0179‐3 had relatively good photochemical performance under water deficit and M. paranaensis parasitism.
ISSN:0931-1785
1439-0434
DOI:10.1111/jph.12884