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Wang L.J.,Guizhou Normal University | Wang L.J.,Rocky Research | Li R.,Guizhou Provincial Monitoring Station of Soil and Water Conservation | Sheng M.Y.,Rocky Research | Sheng M.Y.,State Key Laboratory Incubation Base
Shengtai Xuebao/ Acta Ecologica Sinica | Year: 2017

Karst rocky desertification is an important ecological issue hindering the socioeconomic development of the South China Karst region. In the present study, firstly, three typical rocky desertification regions-Bijie Yachi, Qingzhen Hongfenghu, and Guanling Huajiang, Guizhou Province, representing three different typical karst landforms-plateau mountain, plateau basin, and plateau gorge, respectively, were selected as experimental areas. Then, 90 sample plots with an area of 20 m × 20 m each were established. The distribution of soil organic carbon (SOC) in relation to environmental factors (degree of rocky desertification, landform, vegetation, soil property, etc.) in these plots was determined using field measurements, laboratory detection, and mathematical statistics. The following results were obtained: 1) The SOC content of karst rocky desertification ecosystems was low. The average content of the three experimental areas of Bijie Yachi (Plateau Mountain), Qingzhen Hongfenghu (Plateau Basin), and Cuanling Huajiang (Plateau Gorge) was 23.42, 25.78, 26.03 g/kg, respectively. There was no significant (P = 0.23) difference of SOC contents among the three different landform experimental areas. 2) Land cover change can affect the SOC content. The SOC content of virgin forest (31.32 g/kg) was the highest. With increased soil degeneration from virgin forest to gravel land, the SOC content first decreased and then increased. 3) The SOC content was correlated with soil physico-chemical properties. Specifically, the SOC content was extremely significantly positively correlated with total nitrogen content, hydrolyzed nitrogen content, available potassium content, total porosity, total phosphorus content, natural moisture capacity, field moisture capacity, capillary moisture capacity, and upper strata saturated permeability; significantly positively correlated with total phosphorus content and lower strata saturated permeability, and extremely significantly negatively correlated with soil bulk density. 4) The SOC content and plant diversity rich (R) and diversity (H) indices were extremely positively correlated. 5) There were significant differences of SOC contents between different degrees of rocky desertification. Along with increased degrees of rocky desertification, the SOC content initially decreased and then increased. Based on these results, the distribution pattern of the SOC content and its impact factors in karst rocky desertification ecosystems was clarified. These results have important implications for the protection of karst forest ecosystems, the reconstruction of rocky desertification ecosystems, and the response to global climate change.. © 2017, Ecological Society of China. All rights reserved.


Ni W.-X.,City University of Hong Kong | Man W.-L.,City University of Hong Kong | Cheung M.T.-W.,City University of Hong Kong | Sun R.W.-Y.,University of Hong Kong | And 4 more authors.
Chemical Communications | Year: 2011

A nitridoosmium(vi) complex [OsVI(N)(sap)(OH2)Cl] (H2sap = N-salicylidene-2-aminophenol) displays prominent in vitro and in vivo anti-cancer properties, induces S- and G2/M-phase arrest and forms a stable adduct with dianionic 5′-guanosine monophosphate. © 2011 The Royal Society of Chemistry.


Song Y.,Guizhou University | Song Y.,Guizhou Normal University | Song Y.,State Key Laboratory Incubation Base | Li Z.,Guizhou University
Zootaxa | Year: 2011

Five new species, Limassolla auriculata sp. nov., L. forcipata sp. nov., L. qianfoensis sp. nov., L. rutila sp. nov. and L. yingjianga sp. nov. from China are described and illustrated. A key and a check list of Chinese species of the genus Limassolla is provided. © 2011 · Magnolia Press.


Song Y.,Guizhou University | Song Y.,Guizhou Normal University | Song Y.,State Key Laboratory Incubation Base | Li Z.,Guizhou University
Zootaxa | Year: 2011

The leafhopper genus Takama Dworakowska & Viraktamath (1975) is reported for the first time from China. In the present paper, two new species, Takama horna sp. nov., Takama jianfenga sp. nov. from Hainan Island, China are described and illustrated. © 2011 · Magnolia Press.


Xiang Q.,Key Laboratory of Biology and Genetic Resources of Rubber Tree | Xiang Q.,State Key Laboratory Incubation Base | Xia K.,Key Laboratory of Biology and Genetic Resources of Rubber Tree | Xia K.,State Key Laboratory Incubation Base | And 12 more authors.
Plant Physiology and Biochemistry | Year: 2012

The rubber particle is a specialized organelle in which natural rubber is synthesised and stored in the laticifers of Hevea brasiliensis (para rubber tree). It has been demonstrated that the small rubber particles (SRPs) has higher rubber biosynthesis ratio than the large rubber particles (LRPs), but the underlying molecular mechanism still remains unknown. In this study, LRPs and SRPs were firstly separated from the fresh latex using differential centrifugation, and two-dimensional difference in-gel electrophoresis (2D-DIGE) combined with MALDI-TOF/TOF was then applied to investigate the proteomic alterations associated with the changed rubber biosynthesis capacity between LRPs and SRPs. A total of 53 spots corresponding to 22 gene products, were significantly altered with the |ratio|. ≥. 2.0 and T value ≤0.05, among which 15 proteins were up-regulated and 7 were down-regulated in the SRPs compared with the LRPs. The 15 up-regulated proteins in the SRPs included small rubber particle protein (SRPP), 3-hydroxy-3-methylglutaryl-CoA synthase (HMGCS), phospholipase D alpha (PLD α), ethylene response factor 2, eukaryotic translation initiation factor 5A isoform IV (eIF 5A-4), 70-kDa heat shock cognate protein (HSC 70), several unknown proteins, etc., whereas the 7 up-regulated proteins in the LRPs were rubber elongation factor (REF, 19.6. kDa), ASR-like protein 1, REF-like stress-related protein 1, a putative phosphoglyceride transfer family protein, β-1,3-glucanase, a putative retroelement, and a hypothetical protein. Since several proteins related to rubber biosynthesis were differentially expressed between LRPs and SRPs, the comparative proteome data may provide useful insights into understanding the mechanism involved in rubber biosynthesis and latex coagulation in H. brasiliensis. © 2012 Elsevier Masson SAS.


Song Y.-H.,Guizhou University | Song Y.-H.,Guizhou Normal University | Song Y.-H.,State Key Laboratory Incubation Base | Li Z.-Z.,Guizhou University
Zootaxa | Year: 2013

Two new species, Empoascanara conchata, E. longiaedeaga spp. nov. from Yunnan are described and illustrated, and a key to the species recorded from China is provided. Copyright © 2013 Magnolia Press.

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