Up-regulation of lipid metabolism and glycine betaine synthesis are associated with choline-induced salt tolerance in halophytic seashore paspalum.
Plant Cell Environ
; 43(1): 159-173, 2020 01.
Article
em En
| MEDLINE
| ID: mdl-31600831
ABSTRACT
Choline may affect salt tolerance by regulating lipid and glycine betaine (GB) metabolism. This study was conducted to determine whether alteration of lipid profiles and GB metabolism may contribute to choline regulation and genotypic variations in salt tolerance in a halophytic grass, seashore paspalum (Paspalum vaginatum). Plants of Adalayd and Sea Isle 2000 were subjected to salt stress (200-mM NaCl) with or without foliar application of choline chloride (1 mM). Genotypic variations in salt tolerance and promotive effects of choline application on salt tolerance were associated with both the up-regulation of lipid metabolism and GB synthesis. The genotypic variations in salt tolerance associated with lipid metabolism were reflected by the differential accumulation of phosphatidylcholine and phosphatidylethanolamine between Adalayd and Sea Isle 2000. Choline-induced salt tolerance was associated with of the increase in digalactosyl diacylglycerol (DGDG) content including DGDG (364 and 366) in both cultivars of seashore paspalum and enhanced synthesis of phosphatidylinositol (342, 365, and 362) and phosphatidic acid (342, 341, and 365), as well as increases in the ratio of digalactosyl diacylglycerol monogalactosyl diacylglycerol (DGDGMGDG) in salt-tolerant Sea Isle 2000. Choline regulation of salt tolerance may be due to the alteration in lipid metabolism in this halophytic grass species.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Betaína
/
Regulação para Cima
/
Colina
/
Paspalum
/
Metabolismo dos Lipídeos
/
Plantas Tolerantes a Sal
/
Tolerância ao Sal
Tipo de estudo:
Risk_factors_studies
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article