Stress-associated proteins (SAPs) are a class of zinc finger proteins that confer tolerance to a variety of abiotic and biotic stresses in diverse plant species. However, in cucumber (Cucumis sativus L.), very little is known about the roles of SAP gene family members in regulating plant growth, development, and stress responses. In this study, a total of 12 SAP genes (named as CsSAP1-CsSAP12) were identified in the cucumber genome, which were unevenly distributed on six chromosomes. Gene duplication analysis detected one tandem duplication and two segmental duplication events. Phylogenetic analysis of SAP proteins from cucumber and other plants suggested that they could be divided into seven groups (sub-families), and proteins in the same group generally had the same arrangement of AN1 (ZnF-AN1) and A20 (ZnF-A20) domains. Most of the CsSAP genes were intronless and harbored a number of stress- and hormone-responsive cis-elements in their promoter regions. Tissue expression analysis showed that the CsSAP genes had a broad spectrum of expression in different tissues, and some of them displayed remarkable alteration in expression during fruit development. RT-qPCR results indicated that all the selected CsSAP genes displayed transcriptional responses to cold, drought, and salt stresses. These results enable the first comprehensive description of the SAP gene family in cucumber and lay a solid foundation for future research on the biological functions of CsSAP genes.
Germins and germin-like proteins (GLPs) are glycoproteins closely associated with plant development and stress response in the plant kingdom. Here, we carried out genome-wide identification and expression analysis of the GLP gene family in cucumber to study their possible functions. A total of 38 GLP genes were identified in cucumber, which could be mapped to six out of the seven cucumber chromosomes. A phylogenetic analysis of the GLP members from cucumber, Arabidopsis and rice showed that these GLPs could be divided into six groups, and cucumber GLPs in the same group had highly similar conserved motif distribution and gene structure. Gene duplication analysis revealed that six cucumber GLP genes were located in the segmental duplication regions of cucumber chromosomes, while 14 genes were associated with tandem duplications. Tissue expression profiles of cucumber GLP genes showed that many genes were preferentially expressed in specific tissues. In addition, some cucumber GLP genes were differentially expressed under salt, drought and ABA treatments, as well as under DM inoculation. Our results provide important information for the functional identification of GLP genes in the growth, development and stress response of cucumber.
This paper simply expands two famous consume functions referring to macroeconomics: Keynesian consumption function and Life-cycle consumption function; attempting to introduce the empirical proxy variance of irrational facts: money illusion and over-reaction, we rebuild a new Keynesian consumption model and Life-cycle consumption model, both of which are based on the hypothesis of resident's irrational behavior. Then we use the new model to empirically test the macroeconomic years' data of China's urban residents from 1978 to 2013 and China's rural residents from 1985 to 2013. The empirical results show that all residents of China are irrational, however, the reasons of cause irrational consumption are different, and the urban residents may be for money illusion, but the rural residents may show over-reaction to price volatility. Finally, we give theory analysis about the differences of the two irrational consumption behaviors and the results of the paper.
As a disorder of the myocardium caused by diabetes mellitus, DCM has become a key health concern in the world. Autophagy plays an important role in the pathogenesis of DCM. Sphingosine kinase 1 benefits to cell survival and growth, and regulates the pathogenesis of many diseases, including diabetes and cardiovascular disease. Silibinin is widely used as a hepatoprotective and antioxidant agent in Asia and Europe. However, how silibinin governs DCM remains poorly understood. To this aim, the present study is to mine the role of Sphk1 in autophagy induction and cell survival in myocardial cells under high glucose treatment, and how silibinin regulates DCM. Herein, the study used the embryonic rat heart-derived myogenic H9C2 cells and adenovirus based gene manipulation was utilized. It was found that silibinin could induce autophagy in a dose-dependent manner. Overexpression of Sphk1 significantly increased mRNA expression of autophagy gene markers in H9C2 cells. Gain of function of Sphk1 significantly increased protein level of Beclin1 in H9C2 cells under treatments of low (5.5 mM) and high (25 mM) glucose. High glucose inhibited autophagy induction in H9C2 cells. Gain of function of Sphk1 compromised inhibition of on autophagy induction by high glucose. The results of the present study may assist in attaining an improved understanding of the pathogenesis of DCM, and developing novel therapies for treatment of DCM.
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