Banca de DEFESA: MARLENILDO FERREIRA MELO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : MARLENILDO FERREIRA MELO
DATE: 23/02/2022
TIME: 13:30
LOCAL: Videoconferência
TITLE:

Effect of salicylic and jasmonic acid on cherry tomato growth, physiology and fruit quality under saline stress

KEY WORDS:

fruit quality, reverse osmosis brine, salt stress, Solanum lycopersicum L., water reuse.

PAGES: 82
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUMMARY:

Reusing reverse osmose wastewater is an alternative to cope with water scarcity in semiarid regions. Thus, a hydroponic experiment was conducted to evaluate exogenous salicylic acid (SA) and jasmonic acid (JA) as mitigants of salt stress on cherry tomato (Solanum lycopersicum L. cv. Samambaia) under non-saline (2.16 dS m-1), moderate saline (4.50 dS m-1) and severe saline (9.00 dS m-1) nutrient solution prepared with diluted reverse osmosis brine. Single and combined 500 M SA and 50 M JA were sprayed on leaves, and water was sprayed as control. Results showed that moderate and severe salinity reduced plant growth due to reduced gas exchange and photosynthesis, increased accumulation of Na+ and reduced K+ and Ca2+ in plants tissues, and increased lipid peroxidation and cell electrolyte leakage, which consequently reduced fruit productivity. On the other hand, salt stress improved fruit flavor and quality by enhancing soluble solids content, acidity, and sugars. Foliar spray of SA and JA mitigated damages caused by salt stress by reducing Na+ content, maintaining membrane integrity, and gas exchange. Also, the phytohormone treatment enhanced fruit acidity, vitamin C content, lycopene, skin color, and flavor. In conclusion, adding brine to the nutrient solution reduce cherry tomato growth and productivity, but improve fruit quality. Exogenous SA and JA alleviate salt toxicity but without maintaining plant growth and productivity.

BANKING MEMBERS:
Externo à Instituição - EBENÉZER DE OLIVEIRA SILVA - EMBRAPA
Externo à Instituição - HOZANO DE SOUZA LEMOS NETO - UFPI
Externo à Instituição - MARCELO DE ALMEIDA GUIMARÃES - UFC
Interno - 1505717 - NILDO DA SILVA DIAS
Externo à Instituição - PAHLEVI AUGUSTO DE SOUZA - IFRN
Presidente - 1632114 - PATRICIA LIGIA DANTAS DE MORAIS