Meloidogyne javanica parasitism on the vegetative growth and nutritional quality of carrots

Paula Juliana Grotto Débia,Heriksen Higashi Puerari,Beatriz Cervejeira Bolanho Barros,Claudia Regina Dias-Arieira

doi:10.1590/0103-8478cr20190585

Paula Juliana Grotto Débia, Heriksen Higashi Puerari + Show 2 more

Open Access

https://doi.org/10.1590/0103-8478cr20190585

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Journal: Ciência Rural	Publication Date: Jan 1, 2020
Citations: 2	License type: CC BY 4.0

Affiliation: Universidade Estadual de Maringá

Abstract

ABSTRACT: Meloidogyne javanica is a plant-parasitic nematode that infects a wide range of vegetables. Its negative effects on crop yield and value are well documented. However, few studies have investigated the impact of the parasite on the nutritional value of vegetables. This study aimed to assess the effect of M. javanica parasitism on the vegetative characteristics, nematological parameters, chemistry composition and antioxidant activity of carrots. Seedlings were inoculated with 0 (control), 1000, 2500, or 5000 eggs and eventual second-stage juveniles (J2) of M. javanica. At 60 days after inoculation, plants were harvested and evaluated. Plants inoculated with 2500 eggs and J2 of M. javanica had higher root and tuber fresh weight than the control. Gall number increased with increasing inoculum density. The number of nematodes in the roots increased until 3000 specimens, decreasing thereafter. Proximate analysis revealed that plants inoculated with 1000 eggs and J2 of M. javanica or more had higher protein content in roots. In contrast, inoculation with 1775 nematodes or more resulted in a decrease in carotenoid content. There was no effect of inoculation on total phenolic content or antioxidant activity. Although, M. javanica infection did not have a marked impact on the nutritional quality of carrots, gall formation resulted in deformed roots of low commercial value.

Highlights

Carrot (Daucus carota L.) is a root vegetable with great economic importance worldwide (BONTEMPO et al, 2017; GRABAU et al, 2017)
M. javanica infection did not have a marked impact on the nutritional quality of carrots, gall formation resulted in deformed roots of low commercial value
Gall number increased with increasing inoculum density (Figure 1a), as observed in parsley and spring onion exposed to 0, 760, and 5700 M. incognita eggs + J2 (WALKER, 2002) and cucumber inoculated with M. incognita (KAYANI et al, 2017)

Summary

Introduction

Carrot (Daucus carota L.) is a root vegetable with great economic importance worldwide (BONTEMPO et al, 2017; GRABAU et al, 2017). In Brazil, it is one of the most produced and consumed vegetables (BONTEMPO et al, 2017). Carrots provide many health benefits because of their high content of carotenoids (0.51 g kg−1 dry weight), which are important vitamin A precursors Carrots are typically consumed raw or cooked and can be processed into canned foods, juices, and baby foods. The yield, nutritional quality, and commercial value of the vegetable are influenced by many factors, such as exposure to insects, pathogens, and ultraviolet radiation in the field (SELJASEN et al, 2013).

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