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1

Drought tolerance of Periploca sepium during seed germination: antioxidant defense and compatible solutes accumulation

100%
An Y., Liang Z.
Acta Physiologiae Plantarum
|
2013
|
tom 35
|
nr 03
Periploca sepium Bunge is a native and widespread shrub on the Loess Plateau, an arid and semi-arid region in China. To understand the adaptability of its seed germination to dry environments, we investigated the germination rate, water relations, lipid peroxidation, antioxidant capacity and accumulation of major organic solutes during seed germination under water deficit conditions. Results showed that seeds pre-treated by hydration–dehydration or -0.9 MPa PEG germinated faster than control seeds, indicating strong resistance of P. sepium to drought condition. The re-dried seeds showed higher proline, total free amino acids (TFAA) and soluble proteins (SP) contents than control dry seeds, indicating the maintenance of physiological advancement when dehydrated. Osmotic stress made seed germination stay on the plateau phase (phase II). However, germinating seeds moved into phase III immediately once transferred into distilled water. Large increases in SP and soluble sugars (SS) of both re-dried and osmotic stressed seeds help themselves to resist drought stress. The re-hydrated seeds showed significantly higher levels of proline, TFAA, SP and SS than control seeds. The largely accumulated SS during osmotic stress declined sharply when transferred into distilled water. Our data demonstrate that P. sepium’s tolerance to drought stresses during germination is associated with enhanced activity of antioxidant enzymes and accumulation of some compatible solutes. Seed physiological advancement progressed slowly under low water conditions and it was maintained when seeds were air dried. This strategy ensures high and more rapid seed germination of P. sepium under drying and wetting conditions in drought-prone regions.
2

Exogenous spermidine regulates starch synthesis and the antioxidant system to promote wheat grain filling under drought stress

71%
Li G., Liang Z., Li Y., Liao Y., Liu Y.
Acta Physiologiae Plantarum
|
2020
|
tom 42
|
nr 07
3

How different nitrogen application rates affect yield composition and nitrogen uptake of rice (Oryza sativa L.) in a saline-sodic paddy field

71%
Bao Y., Huang L., Li Y., Wang M., Liang Z.
Polish Journal of Environmental Studies
|
2019
|
tom 28
|
nr 2
Planting rice (OryzasativaL.) is an effective and feasible approach for improving salt-affected soils, especially in saline-sodic soils. Improved rice is the main biological measure for rapid treatment and utilization of a saline-sodic paddy field. Reasonable application of nitrogen fertilizer is an important measure for obtaining saline-sodic soil high yield. Dongdao 4 (D-4), Dongdao 2 (D-2), Changbai 9 (C-9), and Baijing 1 (B-1)) were studied by a field experiment in this paper. On the growth, yield, and yield component responses of different nitrogen levels (150 kg N/ha, 225 kg N/ha and 300 kg N/ha), and the nitrogen uptake of four saline-tolerant rice cultivars at different nitrogen application levels was calculated, which provided a useful reference for the rational application of nitrogen fertilizer in a salinesodic paddy field. The results showed that: biomass of four kinds of rice accumulates over time and reached their maximums in September, with the biomasses of D-2 and D-4 reaching the maximum of 225 kg N/ha, and C-9 and B-1 reaching the maximum at 300 kg N/ha, which is related to rice varieties; the yields of four salt-tolerant rice plants reached the highest in 150 kg N/ha; applied nitrogen fertilizer reasonably was beneficial to increase the number of spikes and the number of effective grains per spike, in this experiment, the optimum amount of nitrogen is 150 kg N/ha, and the number of spikes and the number of effective grains per spike also were major factors in increasing production. With 1000-grain weight, primary and secondary branches made no significant contribution to the yield; the N uptake of four kinds of rice gradually increased over time and reached the maximum in September. There was no significant difference in the nitrogen grain production efficiency of 4 rice varieties under different nitrogen application rates; with the increase of nitrogen application rate, partial productivity of nitrogen fertilizer nitrogen of 4 rice varieties all decreased. Therefore, reasonable application of nitrogen fertilizer promoted the uptake and transfer of nitrogen to the plant.
4

Cloning and functional characterization of the SmNCED3 in Salvia miltiorrhiza

61%
Jia Y., Liu J., Bai Z., Ding K., Li H., Liang Z.
Acta Physiologiae Plantarum
|
2018
|
tom 40
|
nr 07
5

Evaluation of genetic diversity and population structure of polygonati rhizoma germplasms: implications for better crop development and conservation of a traditional Chinese medicine

61%
Jiao J., Bai Z., Huang W., Xia P., Liu F., Ma C., Liang Z.
Acta Physiologiae Plantarum
|
2018
|
tom 40
|
nr 10
6

Treatment of mixed chemical wastewater by a two-stage A/O process for elimination of COD nitrogen and toxic matters

61%
Du P., Li W., Liang Z., Chen Y., Yang S., Yan F.
Polish Journal of Environmental Studies
|
2013
|
tom 22
|
nr 1
In our work a two-stage A/O system consisting of two independent A/O subsystems was used to remove high concentrations of COD, nitrogen, and toxic matter from mixed wastewater discharged by a comprehensive chemical group. The mixed liquid return was not adopted, and the sludge return ratio was kept at a high value of 100-200% to maintain high usable activated sludge concentration. Adequate NaHCO₃ was added to keep the influent alkalinity/KN ratio around 7.14 to 1. The system was running stably during the whole experimental period. Subsystem one obtained high COD and organic nitrogen removal capability without being influenced by the increasing COD loading. 87.6% COD was removed and 75.7% org-N was transformed to NH₄⁺-N. Due to the low COD/KN ratio created by subsystem one, the nitrification efficiency of subsystem two reached a high value of 92.1%. Besides, aerobic biological oxidation of oxic tank one showed excellent ability on toxic matter elimination. The acute toxicity of the whole system dropped from 0.165 to 0.042 mg HgCl₂/L. It has been proven by this study that, using the two-stage A/O system with sludge return only to treat COD nitrogen and toxic matters, laden mixed wastewater from comprehensive chemical groups may be feasible.
7

Spatial spillover effect and sources of city-level haze pollution in China: a case study of Guangdong Provinces

61%
Liao S., Wang D., Liang Z., Xia C., Guo H., Zhao W.
Polish Journal of Environmental Studies
|
2020
|
tom 29
|
nr 5
8

Effect and mechanism of endophytic bacteria on growth and secondary metabolite synthesis in Salvia miltiorrhiza hairy roots

61%
Yan Y., Zhang S., Zhang J., Ma P., Duan J., Liang Z.
Acta Physiologiae Plantarum
|
2014
|
tom 36
|
nr 05
Our study found that except Novosphingobium resinovorum (B5) Salvia miltiorrhiza root endophytic bacteria Pseudomonas brassicacearum sub sp. neoaurantiaca (B1), Rhizobium radiobacter (B2), Pseudomonas thivervalensis (B3), Pseudomonas frederiksbergensis (B4) significantly improved the activity of key enzymes 3-hydroxy-3-methyglutary1-CoA reductase and 1-deoxy-D-xylulose-5-phosphate synthase in the biosynthetic pathway of tanshinones. Specifically, HMGR activity with B1 treatment increased 2.1-fold that of control, 1-deoxy-Dxylulose-5-phosphate synthase activity with B2 treatment increased 5.0-fold that of control, which caused a significant increase in tanshinone content in the hairy roots. The dihydrotanshinone I and cryptotanshinone content under B1 treatment increased 19.2-fold and 11.3-fold, respectively, and total tanshinone content increased 3.7-fold that of control. The five endophytic bacteria B1, B2, B3, B4 and B5 all significantly decreased phenylalanine ammonialyase and tyrosine aminotransferase activity in hairy roots, of which, B3 treatment decreased phenylalanine ammonialyase activity by 46.2 %, and B2 treatment decreased tyrosine aminotransferase activity by 44.7 % compared with the control. Each of the five endophytic bacteria decomposed rosmarinic acid and salvianolic acid B, which caused a significant decrease in rosmarinic acid and salvianolic acid B content in hairy roots, with B2 treatment decreasing rosmarinic acid and salvianolic acid B content by 94.5 and 89.0 %, respectively, compared with the control. The five endophytic bacteria also inhibited the growth of S. miltiorrhiza hairy roots, of which, B2 and B4 treatment decreased hairy root biomass by 55.2 and 51.3 %, respectively, compared with the control, while hairy roots promoted the growth of B4 and B5 and inhibited the growth of B1 and B3.
9

Reconstruction of lymphatic vessels in the mouse tail after cupping therapy

51%
Meng F.-W., Gao Z.-L., Li L., Jie L.-L., Yang P.-F., Liang Z., Gao Y.-W., Liu W.-H.
Folia Morphologica
|
2020
|
tom 79
|
nr 1
Background: The aim of the study was to investigate the regulatory mechanism of local lymphatic reconstruction after cupping therapy in a mouse model. Materials and methods: The lymphatic reconstruction process in the mouse tail after cupping therapy as well as the expression levels of the vascular endothelial identification molecule CD34, prospero homeobox protein 1 (PROX1), and lymphatic vessel endothelial hyaluronan receptor 1 (LYVE-1) were investigated for a duration of 4 days through immunohistochemistry experiments. Results: On day 1 after cupping therapy, the CD34⁺ and LYVE-1⁺ cell densities were significantly increased, and the formed CD34⁺LYVE-1⁺ tubular structure started to express PROX1. This was followed by a decrease in both the CD34⁺ and LYVE-1⁺ stem cell densities to basal levels on the second day after cupping therapy. Both the CD34+ and LYVE-1⁺ cell densities subsequently increased again on the third day after cupping therapy. The increase in the LYVE-1⁺ density was accompanied by tubular structure formation, which is characteristic of lymphangiogenesis. In addition, the colocalisation of CD34⁺ and LYVE-1⁺ cells by immunohistochemistry suggests that the CD34⁺ stem cells differentiated into new lymphatic endothelial cells. Conclusions: Our findings indicate that the mechanism underlying the therapeutic effect of cupping therapy involves upregulation of vascular and lymphatic endothelial markers (CD34⁺, LYVE-1⁺, and CD34⁺LYVE-1⁺) in local tissues, which in turn promotes local new lymphatic vessel formation through the expression of PROX1. (Folia Morphol 2020; 79, 1: 98–104)
10

Changes in carbon, nutrients and stoichiometric relations under different soil depths, plant tissues and ages in black locust plantations

51%
Li H., Li J., He Y., Li S., Liang Z., Peng C., Polle A., Luo Z.-B.
Acta Physiologiae Plantarum
|
2013
|
tom 35
|
nr 10
To investigate influences of forest plantations on soil nutrient properties, biomass accumulation, major nutrient elements (NPK) and their stoichiometric couplings in different tissues and aged plants, and correlations between major nutrient contents in soils and in foliage of plants, 5-, 10-, 15- and 20-year-old plantations of black locust (Robinia pseudoacacia L.) and farmland were selected. Black locust plantations increased soil organic carbon (SOC) and N stocks by 23–327 and 23–119 %, respectively, in the 0–10 cm top soil layer compared to those in farmland. Soil C:N, C:P, C:K, N:P, N:K and P:K ratios were 10.1, 22.9, 0.7, 2.2, 0.7 and 0.03, respectively. These ratios were higher in the 0–10 cm soil layer than those in the 10–20 cm soil layer and increased under older plantations. Higher C contents in stem, N contents in leaf, the largest C pools in stem and N pools in root in 20-yearold plantation were observed. Correspondingly, the highest C:N, C:P and C:K and the lowest N:P and N:K ratios in stem, decreased C:N and C:P ratios in older trees were found. No strong correlations were observed between element contents in soils and in leaves of black locust trees. These results suggest that black locust plantations can increase soil nutrient concentrations, SOC and N stocks resulting in changes in element stoichiometric relations. CNPK contents and their stoichiometries vary with tissues and tree ages of black locust. No strong coupling relations exist between major nutrient element contents in the top soil and in foliage of black locust.
11

Coding single nucleotide polymorphisms and SmCPS1 and SmKSL1 subcellular localization are associated with tanshinone biosynthesis in Salvia miltiorrhiza Bunge roots

51%
Bai Z., Liu J., Zhang C., Huang W., Liang Z., Yan X., Liu Y., Zhu Y.
Acta Physiologiae Plantarum
|
2018
|
tom 40
|
nr 01
Tanshinone is one of the major medicinal components of the roots of Salvia miltiorrhiza Bunge, and SmCPS1 and SmKSL1 are key enzymes in the tanshinone biosynthesis pathway. To increase our understanding of the coding single nucleotide polymorphisms (cSNPs) involved in tanshinone biosynthesis, seven S. miltiorrhiza landraces were examined. Our results revealed that the tanshinone content was significantly different among the seven landraces. In total, 48 cSNPs in SmCPS1 and 47 cSNPs in SmKSL1 were identified, and of these, 38 and 42 cSNPs, respectively, were associated with tanshinone content. The highest A/G and C/T base substitution rates were in SmCPS1 and SmKSL1, respectively. SmKSL1 expression was significantly, positively correlated with tanshinone IIA and tanshinone I contents, and SmCPS1 expression was significantly associated with tanshinone IIA content. Interestingly, subcellular SmCPS1 and SmKSL1 expression was enriched in the plastids. Therefore, cSNPs of SmCPS1 and SmKSL1 are involved in tanshinone biosynthesis in the plastids, where SmCPS1 and SmKSL1 enzymes catalyze tanshinone production in this species.
12

Genetic diversity and population structure assessment of Chinese Senna obtusifolia L. by molecular markers and morphological traits of seed

51%
Mao R., Xia P., Liu J., Li X., Han R., Liu F., Zhao H., Liang Z.
Acta Physiologiae Plantarum
|
2018
|
tom 40
|
nr 01
Senna obtusifolia L. is an important medicinal plant in Asia. This study was the first report on the genetic diversity and population structure of S. obtusifolia which were collected from 47 geographic populations widespread in China. Inter-Simple Sequence Repeat (ISSR) and Start Codon Target Polymorphism (SCoT) combined with seeds morphological traits were used to investigate the relationship of 47 populations. 11 ISSR primers yielded 98 polymorphic bands with 81.67% polymorphism. 24 SCoT primers yielded 267 polymorphic bands with 89.59% polymorphism. The number of allele (Na), the number of effective allele (Ne), Nei’s diversity index (H), and Shannon’s information index (I) reflected a high level of genetic diversity of S. obtusifolia species. The greatest genetic distance (G D) existed between Southwest and Northwest (0.4022ISSR/0.5019SCoT), while the Eastern and Northern showed the least genetic distance (0.1751ISSR/0.2186SCoT). The genetic differentiation (Gst) was 0.4875ISSR/0.4434SCoT, and the gene flow (Nm) was 0.5256ISSR/0.6275SCoT, which indicated that gene exchange among four regions was limited. 47 samples were divided into four clusters mainly according to their geographic distribution through clustering and structure analysis. The analysis on the combined data of ISSR and SCoT showed more reliable and superior results than single analysis of ISSR and SCoT. This study explored the effectiveness of ISSR and SCoT markers to evaluate the genetic diversity and population structure of S. obtusifolia and provided useful information for S. obtusifolia germplasm research and breeding program.
13

Upregulation of miR-340-5p reverses cisplatin sensitivity by inhibiting the expression of CDK6 in HepG2 cells

51%
Tian S., Liu Z., Zhou Q., Wu R., Huang X., Liang Z., Zhang Z., Tian X.
Folia Biologica
|
2021
|
tom 69
|
nr 2
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