Repositorio
Institucional

Vidal, Gladys,

Santander, Christian

Ruiz, Antonieta

Vidal, Catalina

Cornejo, Pablo

Salinity Eustress Increases the Biosynthesis and Accumulation of Phenolic Compounds That Improve the Functional and Antioxidant Quality of Red Lettuce

MDPI

AGRONOMY-BASEL

en

The application of different techniques of positive stress (eustress), such as mild and moderate saline stress, could enhance the nutritional and functional attributes of food vegetables. The present study aimed to evaluate the positive effect of salinity as a eustressor on the functional quality of red lettuce growing under hydroponic conditions and subjected to increasing salinity. Red lettuce plants were grown for 60 days and, 45 days after sowing, were subjected to different levels of salinity (0, 50, 100, 150, and 200 mM NaCl). The phenolic compound concentration and antioxidant activity were measured at 7 and 15 days after the application of salinity treatment. Moreover, at harvest, the root and shoot biomass and efficiency of photosystem II were evaluated. Our results showed that the highest phenolic concentration and antioxidant activity were obtained through moderate salt stress (50 mM NaCl) applied for 15 days without affecting the photosynthetic activity and biomass production of lettuce plants. By contrast, when severe salt stress levels (150-200 mM NaCl) were applied, an increase in phenolic compounds was also obtained, but concomitantly with a significant reduction in antioxidant activity and biomass production. The application of moderate stress in red lettuce suggests its potential use as a tool to increase the biosynthesis and accumulation of bioactive secondary metabolites, improving the nutritional characteristics of red lettuce.

artículo original

This research was funded by Agencia Nacional de Desarrollo (ANID), through the grants ANID/FONDECYT/3210588, ANID/FONDAP/15130015, ANID/FONDECYT 1190585, and ANID/FONDECYT/1210964, and the Chilean Ministry of Education (MINEDUC Chile) through the InES19 project, code FRO19101.

Esta investigación fue financiada por la Agencia Nacional de Desarrollo (ANID), a través de las subvenciones ANID/FONDECYT/3210588, ANID/FONDAP/15130015, ANID/FONDECYT 1190585 y ANID/FONDECYT/1210964, y el Ministerio de Educación de Chile (MINEDUC Chile). a través del proyecto InES19, código FRO19101.

10.3390/agronomy12030598

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bioactive compounds

Lactuca sativa

saline stress

secondary metabolism

LACTUCA-SATIVA L.

RADICAL SCAVENGING ACTIVITY

MINERAL-COMPOSITION

CHLOROPHYLL FLUORESCENCE

LEAVES

FLAVONOIDS

ARTICHOKE

PROFILES

STRESS

ACIDS

Agronomía

Ciencias de las plantas

compuestos bioactivos

Lactuca sativa

estrés salino

metabolismo secundario

LACTUCA-SATIVA L.

ACTIVIDAD ELIMINADORA DE RADICAL

COMPOSICIÓN-MINERAL

FLUORESCENCIA DE CLOROFILA

HOJAS

FLAVONOIDES

ALCACHOFA

PERFILES

ESTRÉS

ÁCIDOS

Horticultura

Biotecnología agrícola

Biotecnología Alimentaria

Salinity Eustress Increases the Biosynthesis and Accumulation of Phenolic Compounds That Improve the Functional and Antioxidant Quality of Red Lettuce

artículo original

version publicada

CC BY 4.0

CC BY 4.0

acceso abierto

acceso abierto

ANID-FONDECYT 3210588

ANID-FONDAP 15130015

ANID-FONDAP 1190585

ANID-FONDECYT 1210964

MINEDUC FRO19101

ANID FONDECYT 3210588

ANID FONDAP 15130015

ANID FONDAP 1190585

ANID FONDECYT 1210964

WOS:000775584800001