Evaluating the Influence of Water Scarcity on the Host Response of Garlic to the Stem and Bulb Nematode Ditylenchus dipsaci

Author:

Lorenzo Carmen1,Ramos Fabio1,Casado Andrés1,Gálvez Ana-María1ORCID,Sanz-Alférez Soledad2,Nombela Gloria1ORCID

Affiliation:

1. Institute for Agricultural Sciences (ICA), Spanish National Research Council (CSIC), Serrano 115 Dpdo., 28006 Madrid, Spain

2. Departament of Biology, Universidad Autónoma de Madrid (UAM), Campus de Cantoblanco, 28049 Madrid, Spain

Abstract

Ditylenchus dipsaci is a plant-parasitic nematode with a great economic impact on bulbous crops, including garlic (Allium sativum L.), and is distributed worldwide, particularly in the Mediterranean region. Traditionally, garlic was a rainfed crop in Spain, but irrigated areas have increased during the last few decades. However, the expected climatic conditions, with longer and more intense droughts, will make it necessary to reduce the water supply to garlic crops. This poses the urgent need to select garlic cultivars more tolerant to water scarcity and that are also more resistant to plant pathogenic organisms. The aim of this work was to analyze the influence of water stress on the host response of garlic plants to D. dipsaci. The specific objectives were to evaluate the level of nematode infestation in plants from four garlic genotypes treated with a reduced irrigation regime and compare them with those of control plants not subjected to water stress. The observed results were correlated with changes in the bulb and root development, as well as in the physiological parameters (total chlorophyll concentration and proline accumulation). The effects were different depending on whether the plants were subjected to water stress before or after nematode inoculation, as well as whether the water stress was continuous or discontinuous. Garlic inter-cultivar variability also affected the obtained results.

Funder

Programa Estatal de I+D+I Orientada a los Retos de la Sociedad, Spanish Ministry of Economy and Competitiveness

European Social Fund through the Youth Employment Operational Program and the Youth Employment Initiative (YEI) of the Spanish Ministry of Science and Innovation

Publisher

MDPI AG

Subject

Plant Science,Ecology,Ecology, Evolution, Behavior and Systematics

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