ABSTRACT
Abstract Soil salinity is a major abiotic stress that results in considerable crop yield losses worldwide. However, some plant genotypes show a high tolerance to soil salinity, as they manage to maintain a high K+/Na+ ratio in the cytosol, in contrast to salt stress susceptible genotypes. Although, different plant genotypes show different salt tolerance mechanisms, they all rely on the regulation and function of K+ and Na+ transporters and H+ pumps, which generate the driving force for K+ and Na+ transport. In this review we will introduce salt stress responses in plants and summarize the current knowledge about the most important ion transporters that facilitate intra- and intercellular K+ and Na+ homeostasis in these organisms. We will describe and discuss the regulation and function of the H+-ATPases, H+-PPases, SOS1, HKTs, and NHXs, including the specific tissues where they work and their response to salt stress.
ABSTRACT
Objective To characterize the clinical presentation of noncardiac chest pain(NCCP), to investigate the quality of life among NCCP patients,and to understand the relation between NCCP and acid reflux and the value of proton pump inhibitor(PPI) in diagnosis of NCCP.Methods Eighty-seven NCCP patients were enrolled to the study.All patients received lansoprzole 30 mg twice daily for 7 days. Patients filled out a questionnaire survey before and after the PPI treatment.The questionnaire included the general personal data,the symptom scale,the medical outcome study 36-item short form healthy survey(SF-36),Zung Self Rating Anxiety Scale(SAS) and Zung Self-rating Depression Scale(SDS).The results were analyzed in comparisons of healthy control group.Results①The most common cause for NCCP was gastroesophageal reflux disease (GERD).The typical reflux syndrome presented among 34.5% of the patients.②Among 87 patients,acid-related NCCP was accounted for 56.3% (49/87), whereas non-acid-related NCCP was accounted for 43.7% (38/87).The sensitivity and specificity of PPI test were 91% and 81%,respectively.③Except the role of role emotional(RE),7 healthy conceptions in the health-related quality of life in NCCP patients were significantly lower than those in healthy volun- teers(P