Chitosan application in the induction of water deficit tolerance in maize plants



Título del documento: Chitosan application in the induction of water deficit tolerance in maize plants
Revista: Acta scientiarum. Agronomy
Base de datos: PERIÓDICA
Número de sistema: 000460048
ISSN: 1679-9275
Autores:
2
2
1
1
Instituciones: 1Universidade Federal de Lavras, Lavras, Minas Gerais. Brasil
2Empresa Brasileira de Pesquisa Agropecuaria, Milho e Sorgo, Sete Lagoas, Minas Gerais. Brasil
Año:
Volumen: 42
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Experimental, analítico
Resumen en inglés The present research seeks to elucidate the feasibility of chitosan (CHT) in the induction of water deficit tolerance in different maize hybrids, contrasting tolerance to water restriction, tolerance and sensitivity. The maize plants were subjected to water deficit and foliar application of different chitosan doses (60, 100, 140, and 180 mg L-1) at the pre-flowering growth stage and evaluated during the stress period of fifteen days. To understand the induction behaviour of the tolerance to water restriction, biophysical parameters, such as water potential, relative water content and chlorophyll content, gas exchange, and biochemical assays, were quantified based on the activity of SOD, CAT, APX, and PAL antioxidant enzymes, lipid peroxidation activity and hydrogen peroxide content. Among the treatments, maize plants subjected to chitosan foliar application at a dose of 140 mg L-1 presented similar behavioural responses to plants under favourable irrigation conditions. Such positive responses are related to the high degree of activity of antioxidant enzymes, gas exchange and low levels of lipid peroxidation and hydrogen peroxide. The results support the potential use of CHT to increase tolerance to water stress
Disciplinas: Agrociencias
Palabras clave: Gramíneas,
Maíz,
Zea mays,
Quitosano,
Estrés hídrico,
Enzimas antioxidantes,
Intercambio de gases
Keyword: Gramineae,
Corn,
Zea mays,
Chitosan,
Antioxidant enzymes,
Water stress,
Gas exchange
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