Silicon promotes the control of Meloidogyne incognita in lettuce by increasing ascorbic acid and phenolic compounds

Autor(es)

de Souza Alonso, Tales Arthur ^[1] ; da Silva, Dalila Lopes ^[1] ; Prado, Renato de Mello ^[1] ; Martins Soares, Pedro Luiz ^[1] ; Lata Tenesaca, Luis Felipe ^[1] ; Junior Ferreira, Rivanildo ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Sch Agr & Veterinarian Sci, Dept Agr Sci, Prof Paulo Donato Castellane, BR-14884900 Jaboticabal, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PEST SCIENCE; JAN 2022.
• Citações Web of Science: 0

Resumo

Silicon (Si) has a physical barrier effect on plant tissues, decreasing nematode infection in different crops. Notwithstanding, research on lettuce is lacking, especially regarding the chemical mechanisms of action of this beneficial element. This study evaluated the effect of Si supply on lettuce plants infested with 0, 6000, and 12,000 eggs and second stage juveniles of Meloidogyne incognita, both in the absence and in the presence of Si (2 mM) in the nutrient solution. Silicon increased phenolic compounds and ascorbic acid, reducing M. incognita population and decreasing oxidative stress. The element also increased chlorophyll content and the quantum efficiency of photosystem II (FV/FM), favoring lettuce growth and production. The use of Si decreased the number of nematodes and affected their reproduction, decreasing the number of eggs and galls on lettuce roots. This indicates that Si may serve as a sustainable alternative for the control of M. incognita. The benefit of using Si appears to be due to the combined effect chemical action from the increase in phenolic compounds and ascorbic acid in plant tissues, improving plant physiology. {[}GRAPHICS] . (AU)

• Processo FAPESP: 20/00195-0 - Silício via fertirrigação na cultura de alface com diferentes infestações de Meloidogyne incógnita
• Beneficiário: Tales Arthur de Souza Alonso
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica