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The Jiyuan tetrapod fauna of the Upper Permian of China: new pareiasaur material and the reestablishment of Honania complicidentata

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Xu L., Li X.-W., Jia S.-H., Liu J.
Acta Palaeontologica Polonica
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2015
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tom 60
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nr 3
Honania complicidentata and Tsiyuania simplicidentata are pareiasaur taxa based on material from the Shangshihezi Formation of Jiyuan, Henan Province, China that were earlier designated as nomina vana. Based on the study of new material, and the reexamination of old specimens, we determine that the pareiasaur material from Jiyuan represents a single species that differs from all known species from other localities. Thus, we resurrect the name H. complicidentata for the material from Jiyuan. H. complicidentata is characterized by maxillary teeth with high crowns, dentary teeth slightly posteriorly inclined compared to the dentary dorsal margin, nearly all preserved marginal teeth have a cusped cingulum on the lingual surface, and humerus without an ectepicondylar foramen. Phylogenetic analysis shows Honania is more basal than Shansisaurus and Shihtienfenia from the Sunjiagou Formation of China.
2

Activation of PKCα is required for migration of C6 glioma cells

76%
Hu J.-G., Wang X.-F., Zhou J.-S., Wang F.-C., Li X.-W., Lu H.-Z.
Acta Neurobiologiae Experimentalis
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2010
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tom 70
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nr 3
The PKC signaling pathway has been implicated in diverse cellular functions. Here, we sought to investigate the role of PKCα/β in C6 glioma cell migration. We found that both PKCα and PKCβ were expressed by C6 glioma cells, but only PKCα was markedly activated in serum-treated C6 cells. Gö6976, a PKC α/β specific inhibitor, was found to cause a dose-dependent reduction of PKCα activation and cell migration induced by serum in C6 cells. These results collectively indicated that the PKCα signaling pathway is necessary for glioma cell migration. Our findings may provide an insight into a better understanding to the malignant progression of gliomas.
3

Differential expression of expressed sequence tags in alfalfa roots under aluminium stresse

76%
Fan F., Li X.-W., Wu Y.-M., Xia Z.-S., Li J.-J., Zhu W., Liu J.-X.
Acta Physiologiae Plantarum
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2011
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tom 33
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nr 2
To gain a better understanding of differentially expressed sequence tags (ESTs) for aluminum (Al) tolerance and to investigate the molecular mechanisms of Al toxicity, cDNA subtraction libraries were generated from Al-stressed roots of alfalfa (Medicago sativa L.) compared with no Al-stressed ones, employing suppression subtractive hybridization. Using differential screening technique in which the probes were labeled with DIG, we identified 45 non-redundant ESTs in Al-stressed alfalfa root tips with significantly altered expression. Among the up-regulated ESTs, we have found genes encoding identified proteins, including malate dehydrogenase, 6-phosphogluconate dehydrogenase, peroxidase, and an ABC transporter, while the down-regulate genes included ATPase, secretory carrier membrane protein 2, pectinesterase inhibitor. In addition, two novel ESTs, EW678752 and EY976957, up- and down-regulated by Al stress were sequenced. Analyzed by real-time PCR, the expressions of EST EW678718, EW678739, EY976969 and EW678728, which encode for ABC transporter, malate dehydrogenase, peroxidase and 6-phosphogluconate dehydrogenase correspondingly, increased 1.64-, 2.75-, 3.27- and 6.54-folds, respectively, and the expression of EY976957 encoding for ATPase decreased 3.27 folds. The expression of EST EW678752 increased 34.54-fold, while that of EY976957 decreased 16.68 folds. It suggested that the two novel ESTs maybe play a significant role in the aluminum tolerance of alfalfa.
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The soybean gene, GmMYBJ2, encodes a R2R3-type transcription factor involved in drought stress tolerance in Arabidopsis thaliana

64%
Su L.-T., Wang Y., Liu D.-Q., Li X.-W., Zhai Y., Sun X., Li X.-Y., Liu Y.-J., Li J.-W., Wang Q.-Y.
Acta Physiologiae Plantarum
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2015
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tom 37
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nr 07
MYB genes are extensively distributed in higher plants and constitute one of the largest transcription factors (TFs) families. These TFs have been proved to be implicated in the regulation of plant growth, development, metabolism, and multiple abiotic stress responses. In the present study, a new soybean MYB gene, denoted GmMYBJ2, was isolated and its function was characterized. The GmMYBJ2 cDNA is 1428 bp in length with an open reading frame (ORF) of 960 bp encoding 319 amino acids. Sequence and yeast one-hybrid analyses showed GmMYBJ2 contains two MYB domains and belongs to R2R3-MYB protein with transactivation activity. Transient expression analysis using the GmMYBJ2-GFP fusion gene in onion epidermal cells showed GmMYBJ2 protein is targeted to the nucleus. GmMYBJ2 was induced by drought, cold, salt, and exogenous abscisic acid (ABA). Arabidopsis overexpressing GmMYBJ2 exhibited a higher seed germination rates (GRs), a notable increase in the soluble sugar content under water-deficit stress, and a lower water loss rate (WLR) when water is sufficient. These results indicated the overexpression of GmMYBJ2 make transgenic Arabidopsis more tolerant to drought stress than wild-type (WT) plants, and GmMYBJ2 may be useful for improving drought stress tolerance in transgenic plant breeding.
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