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1

Genetic variation and relationships in the mitochondrial DNA D-loop region of Qinghai indigenous and commercial pig breeds

100%
Zhang J., Yang B., Wen X., Sun G.
Cellular and Molecular Biology Letters
|
2018
|
tom 23
Background: Bamei pigs are special germplasm resources in Qinghai. In the specific environment of the Qinghai plateau, local breeds, through long-term natural and artificial selection, have acquired a relatively stable population structure and genetic diversity. This study revealed Bamei pigs’ genetic diversity at the molecular level and the degree of introgression of commercial breeds into Bamei pigs. Methods: The mitochondrial DNA D-loop region was amplified and sequenced using the ABI 3130 DNA sequencer. Sequences were collected, edited and aligned using the MEGA 5.0, DNASTAR and ClustalX 1.81 software. Haplotypes of all sequences and genetic diversity were analyzed by DnaSP 5.0 software. Results and conclusions: We identified a total of 73 polymorphic sites in our 489 novel sequences, including 1 single variable site and 72 parsimony informative sites. Genetic diversity was analyzed in this study. The results showed that haplotype diversity, nucleotide diversity and the average number of nucleotide differences of Bamei pigs were lower than those of commercial pigs. Synthetic evaluation of genetic diversity through principal component analysis indicated that Bamei pigs also showed low genetic diversity. In summary, the results of sequence analysis showed that Bamei pigs were low in genetic diversity, and the introgression of commercial pigs into Bamei pigs was serious.
2

Eco-physiological responses of scirpus planiculmis to different water-salt conditions in Momoge Wetland

100%
Zhang L., Zhang G., Li H., Sun G.
Polish Journal of Environmental Studies
|
2014
|
tom 23
|
nr 5
As a common plant in Momoge Wetland, Scirpus planiculmis is the major food source for Siberian Crane (Grus leucogeranus), which is one of the most valuable waterfowl in Momoge Wetland. Through a simulation experiment, this study investigated the effects of different water table depths (-5, 5, 10, 20, and 30 cm) and salinities (300, 1,000, 3,000, 4,000, and 5,000 mg/L) on the eco-physiological characteristics (height, leaf area per plant, chlorophyll content, and chlorophyll fluorescence) of Scirpus planiculmis. The results indicate that for the seedlings of Scirpus planiculmis, the effects of water depth on plant height, leaf area per plant, and chlorophyll content were significant, while salinity affected height increment, chlorophyll content, and chlorophyll fluorescence parameters. For the plants of Scirpus planiculmis, the water depth had a significant effect on height increment and chlorophyll content, while salinity had a significant effect on height increment, chlorophyll content, and chlorophyll fluorescence parameters. These results indicate a suitable ecological response thresholds of water table and salinity on the growth of Scirpus planiculmis seedlings and plants, which were 5-10 cm and less than 3,000 mg/L for seedlings, 30 cm and 300-4,000 mg/L for plants.
3
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Content available

De novo sequencing and comparative transcriptome analysis of white petals and red labella in Phalaenopsis for discovery of genes related to flower color and floral differentiation

88%
Yang Y., Wang J., Ma Z., Sun G., Zhang C.
Acta Societatis Botanicorum Poloniae
|
2014
|
tom 83
|
nr 3
Phalaenopsis is one of the world’s most popular and important epiphytic monopodial orchids. The extraordinary floral diversity of Phalaenopsis is a reflection of its evolutionary success. As a consequence of this diversity, and of the complexity of flower color development in Phalaenopsis, this species is a valuable research material for developmental biology studies. Nevertheless, research on the molecular mechanisms underlying flower color and floral organ formation in Phalaenopsis is still in the early phases. In this study, we generated large amounts of data from Phalaenopsis flowers by combining Illumina sequencing with differentially expressed gene (DEG) analysis. We obtained 37 723 and 34 020 unigenes from petals and labella, respectively. A total of 2736 DEGs were identified, and the functions of many DEGs were annotated by BLAST-searching against several public databases. We mapped 837 up-regulated DEGs (432 from petals and 405 from labella) to 102 Kyoto Encyclopedia of Genes and Genomes pathways. Almost all pathways were represented in both petals (102 pathways) and labella (99 pathways). DEGs involved in energy metabolism were significantly differentially distributed between labella and petals, and various DEGs related to flower color and floral differentiation were found in the two organs. Interestingly, we also identified genes encoding several key enzymes involved in carotenoid synthesis. These genes were differentially expressed between petals and labella, suggesting that carotenoids may influence Phalaenopsis flower color. We thus conclude that a combination of anthocyanins and/or carotenoids determine flower color formation in Phalaenopsis. These results broaden our understanding of the mechanisms controlling flower color and floral organ differentiation in Phalaenopsis and other orchids.
4
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Content available

A new docodont mammal from the Late Jurassic of the Junggar Basin in Northwest China

88%
Pfretzschner H.-U., Martin T., MaischM.W., Matzke A. T., Sun G.
Acta Palaeontologica Polonica
|
2005
|
tom 50
|
nr 4
799-808
Fieldwork in the early Late Jurassic (Oxfordian) Qigu Formation of the Junggar Basin in Northwest China (Xinjiang Autonomous Region) produced teeth and mandibular fragments of a new docodont. The new taxon has a large “pseudotalonid” on the lower molars, and by retention of crest b−g exhibits closer affinities to Simpsonodon and Krusatodon from the Middle Jurassic of Europe than to the other known Asian docodonts Tashkumyrodon, Tegotherium, and Sibirotherium. It differs from the Haldanodon–Docodon−lineage by the “pseudotalonid” and large cusps b and g. A PAUP analysis based on lower molar characters produced a single most parsimonious tree with two main clades. One clade comprises Docodon, Haldanodon, and Borealestes, and the other Dsungarodon, Simpsonodon, and Krusatodon plus the Asian tegotheriids. Analysis of the molar occlusal relationships using epoxy casts mounted on a micromanipulator revealed a four−phase chewing cycle with transverse component. The molars of the new docodont exhibit a well developed grinding function besides cutting and shearing, probably indicating an omnivorous or even herbivorous diet. A grinding and crushing function is also present in the molars of Simpsonodon, Krusatodon, and the Asian tegotheriids, whereas Borealestes, Haldanodon, and Docodon retain the plesiomorphic molar pattern with mainly piercing and cutting function.
5

Contribution of the vegetation layers in the nitrous oxide emission from Alpine Kobresia humulis Serg. meadow ecosystem on the Tibetan Plateau

88%
Du Y., Cao G., Deng Y., Sun G., Cui X.
Polish Journal of Ecology
|
2010
|
tom 58
|
nr 1
Nitrous oxide (N₂O) was one of the major atmospheric greenhouse gases. Its budget was poorly understood in alpine meadow, a dominant vegetation type on the Tibetan Plateau. To characterize a Kobresia humilis meadow on the plateau, N₂O emission rates were monitored from June 2003 to June 2006 in the study area located at 3280 m a.s.l. Nine plots with 1 m × 1 m each were divided into three treatments, i.e. intact herbaceous community (HCK), removal of aboveground plant biomass (CBK), and removal of both above and belowground plant biomass (BSK), to estimate contribution of plants, r hizosphere and bulk soil to the total N₂O emission. N₂O emission from plant aboveground biomass was calculated by flux difference between HCK and CBK, denoted as F (HCK-CBK), from rhizosphere by F (CBK-BSK), and from bulk soil was the flux in BSK treatment. Static chambers (height 50 cm, area 0.5 × 0.5 m²) were used for gas collection. N₂O emission rate was significantly correlated with soil temperature at 5 cm depth in both HCK and BSK (P <0.001). Both treatments demonstrated a seasonal peak rate in growing season and minimum rate in dormancy period. The mean emission rates in the three years were 39.7±2.9 and 30.6±2.5 μg m⁻² h⁻¹ in HCK and BSK, respectively, with the former significantly higher than the latter (P <0.05). In CBK, however, the emission rate did not show consistent correlation with soil temperature, especially in growing season. Its three-year mean emission rate was 36.2±3.3 μg m⁻² h⁻¹. In the K. humilis meadow, bulk soil contributed much more than plants and rhizosphere. The mean emission rate was 3.5±2.9, 5.7±3.8, and 30.6±2.5 μg m⁻² h⁻¹ (P <0.001) from plants, rhizosphere and bulk soil, and these accounted for 9, 14 and 77%, separately. Our results implied that N₂O emission rate decreased little with grazing as indicated by the difference between HCK and CBK in K. humilis meadow (P <0.05). N₂O emission from alpine meadow could not be ignored in addressing regional greenhouse gases budget on the Tibetan Plateau, considering the vast area and much higher radiative forcing of N₂O.
6

Effects of Na2CO3 and NaCl stresses on the antioxidant enzymes of chloroplasts and chlorophyll fluorescence parameters of leaves of Puccinellia tenuiflora (Turcz.) scribn.et Merr.

76%
Wang Y., Sun G., Suo B., Chen G., Wang J., Yan Y.
Acta Physiologiae Plantarum
|
2008
|
tom 30
|
nr 2
Antioxidant enzymes in chloroplasts and chlorophyll fluorescence parameters of leaves of Puccinellia tenuiflora (Turcz.) scribn.et Merr. under isotonic Na2CO3 and NaCl stresses were studied. Ascorbate peroxidase (APX) and superoxide dismutase (SOD) activities showed a similar increasing trend and then decreased with the decreasing osmotic potential of culture solution, peaking at –4.74 x 10⁵ Pa under NaCl stress and at –3.40 x 10⁵ Pa under Na2CO3 stress. APX, glutathione transferase and SOD activities were higher under NaCl stress than those under Na2CO3 stress, and higher activities of antioxidant enzymes in chloroplasts were accompanied by lower MDA content under NaCl stress. Fv/Fm, Fv/Fo and Fv'/Fm' all initially increased and then decreased with the decreasing osmotic potential of culture solution, while ΦPSII, qNP and HDR showed a constant increase. Fv/Fm, Fv/Fo, ΦPSII and qNP under NaCl stress were also shown to be higher than those under Na2CO3 stress. The present study suggested that acidity played an important role in the hurt to Puccinellia tenuiflora seedlings, which was due to higher activities of antioxidant enzymes, qNP and ΦPSII, and the Na2CO3 resistance to Puccinellia tenuiflora was also supposed to be less than NaCl resistance in present work.
7

Expression of peroxiredoxins in the human testis, epididymis and spermatozoa and their role in preventing H2O2-induced damage to spermatozoa

76%
Shi H., Liu J., Zhu P., Wang H., Zhao Z., Sun G., Li J.
Folia Histochemica et Cytobiologica
|
2018
|
tom 56
|
nr 3
8

Effects of nitrogen spraying on the post-anthesis stage of winter wheat under waterlogging stress

76%
Wu J.-D., Li J.-C., Wei F.-Z., Wang C.-Y., Zhang Y., Sun G.
Acta Physiologiae Plantarum
|
2014
|
tom 36
|
nr 01
Waterlogging is a main stress factor during the late growing stage of winter wheat (Triticum aestivum L.) in the southern Huanghuai and Yangtze Valley regions of China. The effects of nitrogen spraying on post-anthesis of winter wheat under waterlogging stress were studied in continuous growing seasons from 2009 to 2011. The results showed that waterlogging after the anthesis stage significantly reduced root respiratory activity, leaf greenness (SPAD reading), photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tᵣ) by averages of 11.09, 10.75, 15.18, 8.97 and 8.82 %, respectively, increased intercellular CO₂ concentration (Cᵢ) by 9.74 % and decreased grain number per spike, 1,000-grain weight and grain yield by 8.07, 12.68 and 20.11 %, respectively. Nitrogen spraying significantly improved root respiratory activity, leaf greenness (SPAD reading), photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tᵣ) by 4.96, 7.35, 7.01, 5.09 and 5.09 %, respectively, reduced intercellular CO₂ concentration (Cᵢ) by 9.74 % and increased grain number per spike, 1,000-grain weight and grain yield by 4.71, 6.45 and 11.48 %, respectively. However, neither nitrogen spraying nor waterlogging had significant effects on spike number. There was significant interaction between waterlogging and nitrogen spraying. Our results suggest that nitrogen spraying is an effective way to alleviate the negative effects of waterlogging stress after anthesis stage in winter wheat.
9

Global mapping of ZBTB7A transcription factor binding sites in HepG2 cells

64%
Zu X., Yu L., Sun Y., Tian J., Liu F., Sun Q., He S., Sun G., Luo W., Jiang Y.
Cellular and Molecular Biology Letters
|
2010
|
tom 15
|
nr 2
ZBTB7A is a known proto-oncogene that is implicated in carcinogenesis and cell differentiation and development. Fully understanding the function of ZBTB7A in cellular processes could provide useful strategies for cancer treatment and development-associated disease therapy. Here, global mapping of ZBTB7A transcription factor binding sites was developed by utilizing microarray technology in HepG2 cells. The data obtained from the microarrays was further validated via chromatin immunoprecipitation-PCR (ChIP-PCR) and real time-PCR, and it was revealed that ZBTB7A may be one of the regulators of neural development. ZBTB7A target signal pathways were identified in signal pathway and GO (Gene Ontology) analyses. This is the first report on the global mapping of ZBTB7A downstream direct targets, and these findings will be useful in understanding the roles of ZBTB7A in cellular processes.
10

Gaseous NO2 effects on stomatal behavior, photosynthesis and respiration of hybrid poplar leaves

64%
Hu Y., Bellaloui N., Tigabu N., Wang J., Diao J., Wang K., Yang R., Sun G.
Acta Physiologiae Plantarum
|
2015
|
tom 37
|
nr 02
In this study, we used poplar as a model plant and investigated the effects of gaseous nitrogen dioxide (NO2, 4 ll 1-1) on stomatal conductance, photosynthesis, dark- and photorespiration of Populus alba 9 Populus berolinensis hybrid leaves using the photosynthesis system and scanning electron microscope technique. The results showed that net photosynthetic rates were significantly reduced in leaves exposed to 4 ll 1-1 NO2 for 48 h as compared with leaves exposed to ambient carbon dioxide 380 ll 1-1 and ambient NO2\0.1 ll 1-1 (the control) and the leaves exposed for 14 h. The decline of net photosynthetic rate was caused mainly by NO2 treatment. Dark respiration rates were dependent on co-action of the two factors (leaf temperature and NO2 treatment time). Postillumination carbon dioxide burst in the exposed leaves occurred at 13–15 s after turning the light off, whereas this phenomenon was absent in the control leaves.
11

The effect of habitat on methane emission from an alpine wetland

64%
Chen H., Wu N., Gao Y., Yao S., Wang Y., Tian J., Sun G., Yuan X.
Polish Journal of Ecology
|
2009
|
tom 57
|
nr 2
377-381
Alpine wetland is a source for methane (CH₄), an important greenhouse gas, but little is known about how this habitat influences the emission. To understand this wetland habitats were selected at the altitude of 3430 m a.s.l. (in National Wetland Nature Reserve of Zoige, Quingle – Tibetan Plateau) and the methane flux was measured with static chambers in three different sites, including hollows with Carex muliensis Hand – Mazz. and Eleocharis valleculosa Ohwi f. setosa (Ohwi) Kitagawa., grass hummocks composed of Kobresia tibetica Maxim, Cremanthodium pleurocaule R. D. Good, Potentilla bifurca L. and Pedicularis sp. We have found that in alpine wetland these habitats significantly affect CH₄ emissions in the onset (April, 2006) and peak (August, 2005) stages of growing season.Hollows covered with Carex muliensis and Eleocharis valleculosa had higher values of emission than grass hummocks built by several grass species. Slight difference of CH₄ emission was found between two kinds of hollows with Carex muliensis and Eleocharis valleculosa. These results were consistent with the change of water table, which was found best correlated with CH₄ emissions (r²= 0.43, P <0.01) in the peak stage of growing season. Directly measured shoot biomass and plant heights were best related to CH₄ emissions (r²= 0.59, P <0.01). However, in the onset stage of growing season, variation of CH₄ emission may not be simply ascribed to changes in water table and vegetation structure.
12

Identification of candidate thermotolerance genes during early seedling stage in upland cotton (Gossypium hirsutum L.) revealed by comparative transcriptome analysis

64%
Peng Z., He S., Gong W., Sun J., Pan Z., Sun G., Cao M., Hu J., Du X., Lu Y.
Acta Physiologiae Plantarum
|
2016
|
tom 38
|
nr 09
13

Structure and evolution of the complete mitochondrial genome of the freshwater drum, Aplodinotus grunniens (Actinopterygii: Perciformes: Sciaenidae)

64%
Wen H., Ma X., Xu P., Cao Z., Zheng B., Hua D., Jin W., Sun G., Gu R.
Acta Ichthyologica et Piscatoria
|
2020
|
tom 50
|
nr 1
14

Exogenous spermidine alleviates fruit granulation in a Citrus cultivar (Huangguogan) through the antioxidant pathway

64%
Xiong B., Ye S., Qiu X., Liao L., Sun G., Luo J., Dai L., Rong Y., Wang Z.
Acta Physiologiae Plantarum
|
2017
|
tom 39
|
nr 04
15

Overexpression of Rictor protein and Rictor-H. pylori interaction has impact on tumor progression and prognosis in patients with gastric cancer

52%
Wang F., Lou X., Zou Y., Hu D., Liu J., Ning J., Jiao Y., Zhang Z., Yang F., Fan L., Yu H., Wei W., Wang H., Sun G.
Folia Histochemica et Cytobiologica
|
2020
|
tom 58
|
nr 2
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