Expression of LTP genes in response to saline stress in rice seedlings.
Saline stress is one of the primary factors limiting increased rice productivity in the southern region of Brazil. Farming can be affected by salinity that is due to both the origin of the soils as well as the irrigation water. Lipid transfer proteins (LTPs) have many physiological functions, including in the response to saline stress. Therefore, the objective of this study was to quantify the relative expression of 11 genetic isoforms that encode LTP1-type proteins in rice genotypes tolerant and sensitive to saline stress in the vegetative period. When the plants reached development stage V4, alternating irrigation was started with nutritive solution and water containing 150 mM NaCl. The LTP7 gene showed an increase in expression by 13.81-fold after 96 h of stress exposure in the saline-tolerant group, whereas the LTP10 gene expression level was increased by 71.10-fold after 96 h in the saline-sensitive group. The LTP26, LTP23, and LTP18 genes showed increased expression in both genotypes; however, the expression levels and response times were different. Thus, LTP7 and LTP10 showed the highest response to salinity. The LTP18, LTP23, and LTP26 genes were negatively correlated with the response to salinity.
Departamento de Botânica, Universidade Federal de Pelotas, Pelotas, RS, Brasil.
G P
GP
Moraes
Departamento de Botânica, Universidade Federal de Pelotas, Pelotas, RS, Brasil.
L C
LC
Benitez
Departamento de Botânica, Universidade Federal de Pelotas, Pelotas, RS, Brasil.
M N
MN
do Amaral
Departamento de Botânica, Universidade Federal de Pelotas, Pelotas, RS, Brasil.
I L
IL
Vighi
Departamento de Botânica, Universidade Federal de Pelotas, Pelotas, RS, Brasil.
P A
PA
Auler
Departamento de Fitotecnia, Universidade Federal de Pelotas, Pelotas, RS, Brasil.
L C
LC
da Maia
Departamento de Botânica, Universidade Federal de Pelotas, Pelotas, RS, Brasil.
V J
VJ
Bianchi
Departamento de Botânica, Universidade Federal de Pelotas, Pelotas, RS, Brasil.
E J B
EJ
Braga
D052179:Antigens, Plant / Q000096:biosynthesis* / Q000235:genetics; D001938:Brazil; D002352:Carrier Proteins / Q000096:biosynthesis* / Q000235:genetics; D018506:Gene Expression Regulation, Plant; D005838:Genotype; D005810:Multigene Family / Q000235:genetics; D012275:Oryza / Q000235:genetics* / Q000254:growth & development; D010940:Plant Proteins / Q000096:biosynthesis* / Q000235:genetics; D054712:Salinity; D036226:Seedlings / Q000187:drug effects / Q000235:genetics*; D012965:Sodium Chloride / Q000633:toxicity; D013312:Stress, Physiological
D052179:Antigens, Plant; D002352:Carrier Proteins; D010940:Plant Proteins; C511920:lipid transfer proteins, plant; D012965:Sodium Chloride