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1

Heavy oil biodegradation by mixed bacterial consortium of biosurfactant-producing and heavy oil-degrading bacteria

100%
Dai X., Lv J., Guo S., Wei W.
Polish Journal of Environmental Studies
|
2021
|
tom 30
|
nr 1
2

Genome-wide identification and expression analysis of the lipoxygenase gene family during peach fruit ripening under different postharvest treatments

88%
Guo S., Song R., Ma R., Yang Y., Yu M.
Acta Physiologiae Plantarum
|
2017
|
tom 39
|
nr 05
3

The ecological profit in phenology and pollination of alien species Spartina alterniflora [Loisel] introduced to coastal wetlands in Northern China

88%
Shi F., Yuan Z., He K. S., Li J., Guo S.
Polish Journal of Ecology
|
2009
|
tom 57
|
nr 2
283-289
For the plant species, effective phenology and pollination syndromes can increase viable seeds which enhance the species to colonize new areas. So the species with a suit of advantageous characteristics inherent in its reproductive ecology is critical to its dispersion. Spartina alterniflora – a perennial grass native to coastal marshes of America was introduced to China in 1979 and now it is distributed in the Tianjin coastal wetlands of northern China. Flowering phenology was examined and indicated that in northern localities, flowering initiated in mid-August and senescence occurred by the end of October. The pollen-ovule ratio was 9875 (±2150). Abundant pollen grains compensated for a lack of pollen viability. Pollen viability was 10% approximately when pollen released 4 hours, but stigma receptivity was above 10% when stigmas exserted 7 hours. Stigmas maintained viability longer than the period of pollen release, ensuring successful pollination. Scanning electron microscopy was used to observe stigma surface characters and pollen viability. Further investigation proved stigma adaptations to increase pollen capture and exterior pollen tube growth following pollination was beneficial to fertilization. The results suggested that flowering phenology and pollination traits are vital to pollination and production of viable seed, enabling the species to spread rapidly and succeed in new habitats of northern China.
4
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A noteworthy disjunction of the epiphytic moss Lewinskya graphiomitria

88%
Plasek V., Kominkova Z., Cihal L., Fialova L., Guo S.
Acta Societatis Botanicorum Poloniae
|
2020
|
tom 89
|
nr 3
5

LID facility layout and hydrologic impact simulation in an expressway service area

88%
Gao J., Pan J., Tang R., Guo S., Liu Y.
Polish Journal of Environmental Studies
|
2019
|
tom 28
|
nr 6
6

Exogenous spermidine maintains the chloroplast structure of cucumber seedlings and inhibits the degradation of photosynthetic protein complexes under high-temperature stress

76%
Wang L., Zhou H., Guo S., An Y., Shu S., Lu N., Sun J.
Acta Physiologiae Plantarum
|
2018
|
tom 40
|
nr 03
7

KT/HAK/KUP potassium transporter genes differentially expressed during fruit development, ripening, and postharvest shelf-life of 'Xiahui' peaches

76%
Song Z., Guo S., Zhang C., Zhang B., Ma R., Korir N. K., Yu M.
Acta Physiologiae Plantarum
|
2015
|
tom 37
|
nr 07
Potassium (K+) is an essential macronutrient for plant growth, development, and fruit quality and yield. K+ uptake and transport is facilitated by KT/HAK/KUP transporters. However, studies to establish molecular mechanisms are rare in fruits, especially in peaches. In this study, we isolated 16 putative KT/HAK/KUP transporter genes in peach, and analyzed K+ homeostasis status in relation to KUP (K+ uptake) gene expression during whole fruit development life. The ‘Xiahui6’ peach development was divided into four distinct stages, S1–S4, and fruits were harvested on 110 days after full bloom (DAFB). QRTPCR results showed that PpeKUP genes unevenly existed in various fruit parts and are differentially expressed during fruit development, ripening, and postharvest storage. The most highest-expressed gene was PpeKUP1 in mesocarp and PpeKUP2 in skin, especially during early stages, while PpeKUP3 was steadily expressed even until postharvest shelf-life. After harvest, the flesh firmness was nonsignificantly changed under cold treatment (4 C), to avoid ripening. Notably, five PpeKUP genes were responsive to cold treatment as their expression were mainly induced in skin, except for PpeKUP3 that was decreased in both mesocarp and skin. Moreover, functional determination showed that PpeKUP1 and PpeKUP2 are important K+ transporters that mediate K+ uptake and accumulation, especially during fruit formation and fast growth stages. This study reveals a close relationship among peach growth, firmness maintenance, and K+ homeostasis, and directly provides potential candidate genes for further molecular studies.
8

Dynamic characteristics of sugar accumulation and related enzyme activities in sweet and non-sweet watermelon fruits

76%
Liu J., Guo S., He H., Zhang H., Gong G., Ren Y., Xu Y.
Acta Physiologiae Plantarum
|
2013
|
tom 35
|
nr 11
Sugar content largely determines watermelon fruit quality. We compared changes in sugar accumulation and activities of carbohydrate enzymes in the flesh (central portion) and mesocarp of elite sweet watermelon line 97103 (Citrullus lanatus subsp. vulgaris) and exotic nonsweet line PI296341-FR (C. lanatus subsp. lanatus) to elucidate the physiological and biochemical mechanisms of sugar accumulation in watermelon fruit. The major translocated sugars, raffinose and stachyose, were more unloaded into sweet watermelon fruit than non-sweet fruit. During the fruit development, acid a-galactosidase activity was much higher in flesh of 97103 than in mesocarp of 97103, in flesh and mesocarp of PI296341-FR fruit. Insoluble acid invertase activity was higher in 97103 flesh than in 97103 mesocarp, PI296341-FR flesh or mesocarp from 18 days after pollination (DAP) to 34 DAP. Changes in soluble acid invertase activity in 97103 flesh were similar to those in PI296341-FR flesh and mesocarp from 18 DAP to full ripening. Sucrose synthase and sucrose phosphate synthase activities in 97103 flesh were significantly higher than those in 97103 mesocarp and PI296341- FR fruits from 18 to 34 DAP. Only insoluble acid invertase and sucrose phosphate synthase activities were significantly positively correlated with sucrose content in 97103 flesh. Therefore, phloem loading, distribution and metabolism of major translocated sugars, which are controlled by key sugar metabolism enzymes, determine fruit sugar accumulation in sweet and non-sweet watermelon and reflect the distribution diversity of translocated sugars between subspecies.
9

24-Epibrassinolide regulates carbohydrate metabolism and increases polyamine content in cucumber exposed to Ca(NO3 )2 stress

76%
Yuan L., Zhu S., Li S., Shu S., Sun J., Guo S.
Acta Physiologiae Plantarum
|
2014
|
tom 36
|
nr 11
Key message This study focuses on the impact of carbohydrate metabolism and endogenous polyamines levels in leaves of cucumber seedlings under salt stress by exogenous BRs.
10

Exogenous spermidine delays chlorophyll metabolism in cucumber leaves (Cucumis sativus L.) under high temperature stress

76%
Zhou H., Guo S., An Y., Shan X., Wang Y., Shu S., Sun J.
Acta Physiologiae Plantarum
|
2016
|
tom 38
|
nr 09
11

Model to assess the habitat suitability for endangered bird species: Brown Eared-pheasant Crossoptilon mantchuricum Swinhoe in Xiaowutaishan Reserve, China

76%
Li D., Gao S., Wu Y., Sun L., Guo S., Li J.
Polish Journal of Ecology
|
2008
|
tom 56
|
nr 4
723-729
Brown Eared-pheasant (Crossoptilon mantchuricum Swinhoe, 1863) is an endangered species endemic to China. Habitat management for Brown Eared-pheasant has to compensate the loss of natural forests and to improve their habitat quality. In this study, we applied a Habitat Suitability Index (HSI) model to analyze the habitat suitability and quality for the breeding populations of this species in Xiaowutaishan National Nature Reserve, North China. The Reserve (area 21833 ha) is located at 800–2882 m a.s.l. and high mountain and deep valley habitats as well as different types of mountain forest and alpine meadows occur there. We used six variables (vegetation type, canopy cover, altitude, exposure, slope gradient and position of slope) both in field observation and in the analysed model. According to the utilization rates of different habitat types by Brown Eared-pheasants, these variables were categorized into five classes (unsuitable, less suitable, moderately suitable, suitable, and highly suitable). Our results show that highly suitable, suitable, less suitable and unsuitable habitat accounted for 13.5%, 53%, 32%, and 1.5% of the entire reserve area, respectively. Our HSI model is well validated by the observed data. We expect this study can be useful as an example of successful model applying to the habitat management or population manipulation of the endangered species.
12

Production of flavonoids and polysaccharide by adding elicitor in different cellular cultivation processes of Glycyrrhiza uralensis Fisch

76%
Guo S., Man S., Gao W., Liu H., Zhang L., Xiao P.
Acta Physiologiae Plantarum
|
2013
|
tom 35
|
nr 03
In this study, callus and cell suspension were induced from seedlings of licorice (G. uralensis). In addition, it was revealed that the appropriate concentration of sucrose could promote the callus growth and increase the content of polysaccharide. The methyl jasmonate (MJ) and phenylalanine (PHE) could enhance the callus growth and content of flavonoids for G. uralensis. For producing more flavonoids and polysaccharide, two-stage cultivation was performed. In the first step, 30 g L-1 sucrose was fed into a 5-L balloon-type bubble bioreactor on 8th day of culture to enhance cell production and metabolite production. In a two-stage cultivation process, PHE (2 mM) and MJ (5 mg L-1) were added into a 5-L balloon-type bubble bioreactor after 10 days of culture. Using a fed-batch cultivation strategy (30 g L-1 sucrose was fed into a 5-L balloon-type bubble bioreactor on 8th day), polysaccharide production was enhanced to 1.19 g L-1, which was 2.12- fold greater than that in batch cultivation. The flavonoids yield (55.42 mg L-1) which was about 22 % higher than that in batch cultivation was obtained on 21st day. In a two-stage cultivation process, the polysaccharide content was increased by 1.14- and 2.12-fold compared with fedbatch cultivation and batch cultivation on 15th day. Meanwhile, total flavonoids yield (132.36 mg L-1) on 15th day, was increased by 2.26- and 2.67-fold compared with fed-batch cultivation and batch cultivation. In conclusion, two-stage cultivation process combined with the sucrose and elicitor treatment could promote both the callus growth and the secondary metabolites accumulation.
13

Comparative dynamics of ethylene production and expression of the ACS and ACO genes in normal-ripening and non-ripening watermelon fruits

64%
Zhou M., Guo S., Zhang J., Zhang H., Li C., Tang X., Ren Y., Gong G., Xu Y.
Acta Physiologiae Plantarum
|
2016
|
tom 38
|
nr 09
14

Root-applied brassinolide can alleviate the NaCl injuries on cotton

64%
Shu H., Ni W., Guo S., Gong Y., Shen X., Zhang X., Xu P., Guo Q.
Acta Physiologiae Plantarum
|
2015
|
tom 37
|
nr 04
Brassinolide (BL) is a plant growth regulator. This study analyzes the effects of BL on cotton growth, Na+ accumulation, proline content, MDA content, antioxidant enzyme activities, and differentially expressed genes (DEGs) of cotton roots under NaCl stress. We grew two cotton cultivars, Sumian 12 (salt sensitive) and Sumian 22 (salt tolerant), in continuously aerated Hoagland’s nutrient solution supplemented with 200 mM NaCl. NaCl stress increased the Na+, proline, and MDA content and decreased root activity and protein content in the roots of Sumian 12 and 22, and the change rang of Sumian 12 was higher than that of Sumian 22. The application of BL counteracted the NaCl stress-induced growth inhibition in the two tested cotton cultivars. It reduced the accumulation of Na+, enhanced proline content, and resulted in an overall change in the activities of antioxidant enzymes causing a decrease in the MDA content of NaCl-stressed roots, and the influence of BL on salt-stressed Sumian 12 plants was more pronounced than that on Sumian 22. The digital gene expression analysis in Sumian 12 indicated that BL application significantly influenced the gene expression in NaCl-stressed roots. The majority of 7659 (3661 up-regulated/3998 down-regulated) DEGs of NaCl/CK in roots of Sumian 12 were regulated by BL, and the gene expression pattern as a result of the root-applied BL on NaCl-stressed cotton treatment (BL + NaCl) was similar to the control. Our results indicate that the rootapplied brassinolide alleviates NaCl stress on cotton through improving root activity, physiology, and gene expression.
15

Toxic effects of anatase titanium dioxide nanoparticles on spermatogenesis and testicles in male mice

64%
Song G., Lin L., Liu L., Wang K., Ding Y., Niu Q., Mu L., Wang H., Shen H., Guo S.
Polish Journal of Environmental Studies
|
2017
|
tom 26
|
nr 6
Anatase TiO₂ nanoparticles (NPs) are widely used in food products, capsules, toothpaste, and so on, so the kinds of NPs directly get in touch with human bodies. The potential effect of this kind of material on reproduction must be considered with the increase in infertility. Sixty ICR male mice were intragastrically treated with dosages of 0, 10, 50, and 100 mg kg⁻¹ body weight (BW) anatase TiO₂ NPs to investigate the male reproductive toxicity of the NPs. Sperm quality, morphological changes in mice testes, and oxidative damage indexes were investigated in this study. Results showed that anatase TiO₂ NPs could lead to sperm malformation and increased rate of sperm cell micronucleus. These NPs also reduced the germ cell number and led to spherospermia, interstitial glands vacuole, malalignment, and vacuolization of spermatogenic cells in mice testes. Testicular cells accumulated reactive oxygen species when the mice were intragastrically administrated with TiO₂ NPs. Superoxide dismutase activity decreased, and the malondialdehyde content increased in the TiO₂ NP-treated groups. Anatase TiO₂ NPs exerted potential toxic effects on male reproduction, so the widespread application of this kind of NP in food products needs to be regulated.
16

Missense mutations in IHH impair Indian hedgehog signaling in C3H10T1-2 cells: implications for brachydactyly type A1, and new targets for hedgehog signaling

52%
Guo S., Zhou J., Gao B., Hu J., Wang H., Meng J., Zhao X., Ma G., Lin C., Xiao Y., Tang W., Zhu X., Cheah K. S. E., Feng G., Chan D., He L.
Cellular and Molecular Biology Letters
|
2010
|
tom 15
|
nr 1
153-176
Heterozygous missense mutations in IHH result in Brachydactyly type A1 (BDA1; OMIM 112500), a condition characterized by the shortening of digits due to hypoplasia/aplasia of the middle phalanx. Indian Hedgehog signaling regulates the proliferation and differentiation of chondrocytes and is essential for endochondral bone formation. Analyses of activated IHH signaling in C3H10T1/2 cells showed that three BDA1-associated mutations (p.E95K, p.D100E and p.E131K) severely impaired the induction of targets such as Ptch1 and Gli1. However, this was not a complete loss of function, suggesting that these mutations may affect the interaction with the receptor PTCH1 or its partners, with an impact on the induction potency. From comparative microarray expression analyses and quantitative real-time PCR, we identified three additional targets, Sostdc1, Penk1 and Igfbp5, which were also severely affected. Penk1 and Igfbp5 were confirmed to be regulated by GLI1, while the induction of Sostdc1 by IHH is independent of GLI1. SOSTDC1 is a BMP antagonist, and altered BMP signaling is known to affect digit formation. The role of Penk1 and Igfbp5 in skeletogenesis is not known. However, we have shown that both Penk1 and Igfbp5 are expressed in the interzone region of the developing joint of mouse digits, providing another link for a role for IHH signaling in the formation of the distal digits.
17

The relationship between liver dysfunction and arsenic methylation in Mice

52%
Li S., Ma R., Niu Q., Xu S., Pang L., Ding Y., Mu L., Jing M., Feng G., Liu J. M., Wang H., Li F., Guo S.
Polish Journal of Environmental Studies
|
2015
|
tom 24
|
nr 4
The different methyl metabolic products of inorganic arsenic lead to various toxicities. Arsenic has been demonstrated to induce hepatotoxicity by oxidative stress. The relationship between hepatic injury and inorganic methylation is not yet known. This study was designed to explore the relationship between arsenic methylation and liver oxidative stress induced by arsenic trioxide (ATO). Forty healthy KM mice were randomly divided into control group (0.9% saline) and As₂O₃ (1.0 mg/Kg/day, 2.0 mg/Kg/day, 4.0 mg/Kg/day) groups with gastric perfusion for five weeks using high-efficiency liquid chromatography and hydride genesis atomic fluorescence spectroscopy (HPLC-HGAFS). The products of arsenic trioxiode methylating, including trivalent inorganic arsenic (iAs³⁺), pentavalent inorganic arsenic (iAs⁵⁺), mono methyl arsenic (MMA), and dimethyl arsenic (DMA) in the liver were determined. The indexes of arsenic methylation, including primary methyl index (PMI) and second methyl index (SMI) were calculated. The level of hepatic function and activity of MDA, GSH, SOD, and TAOC were detected with kits. We found that the remaining arsenic metabolic products in liver significantly increased with the increasing doses of arsenic trioxide and the liver function and oxidative stress deteriorated. Negative correlations were found between MMA%, PMI and GSH, SOD, and TAOC, while DMA% and SMI positively correlated with the levels of ALT and AST. PMI and SMI negatively correlated with TAOC, GSH, SOD, ALT, and AST, positively linked with the level of MDA. The present study demonstrates that the hepatotoxicity induced by the arsenic accounts for deteriorating oxidative injury activized by arsenic methylation metabolism, providing additional evidence to suggest a mechanism of arsenic poisoning. Therefore, reducing the process of arsenic methylation may be potentially benefical in treating and – more importantly – preventing arseniasis.
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