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Leaf physiological and anatomical responses of two sympatric Paphiopedilum species to temperature

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Plant Diversity 2022年第1期44卷 101-108页

作者： jing-Qiu Feng ji-hua wang Shi-Bao Zhang Key Laboratory of Economic Plants and Biotechnology Yunnan Key Laboratory for Wild Plant ResourcesKunming Institute of BotanyChinese Academy of SciencesKunming650201YunnanChina University of Chinese Academy of Sciences Beijing100049China Flower Research Institute of Yunnan Academy of Agricultural Sciences Kunming650205YunnanChina

Paphiopedilum dianthum and *** are two endangered orchid species,with high ornamental and conservation *** are sympatric species,but their leaf anatomical traits and flowering period have significant ***,it is unclear whether the differences in leaf structure of the two species will affect their adaptabilities to ***,we investigated the leaf photosynthetic,anatomical,and flowering traits of these two species at three sites with different temperatures(Kunming,16.7±0.2°C;Puer,17.7±0.2°C;Menglun,23.3±0.2°C)in southwest *** with those at Puer and Kunming,the values of light-saturated photosynthetic rate(Pmax).stomatai conductance(gs),leaf thickness(LT),and stomatai density(SD)in both species were lower at *** values of Pmax,gs,仃,adaxial cuticle thickness(CTad)and SD in *** were higher than those of *** at the three *** with ***,there were no flowering plants of *** at *** results indicated that both species were less resistance to high temperature,and *** had a stronger adaptability to high-temperature than *** findings can provide valuable information for the conservation and cultivation of Paphiopedilum species.

关键词： Conservation Cultivation High-temperature Leaf anatomy Paphiopedilum Photosynthesis

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Plant Diversity 2020年第5期42卷 362-369页

作者： jiao Qin Wei Zhang Shi-Bao Zhang ji-hua wang Key Laboratory of Economic Plants and Biotechnology Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan650201China Yunnan Key Laboratory for Wild Plant Resources KunmingYunnanChina Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglaYunnanChina Flower Research Institute Yunnan Academy of Agricultural SciencesKunmingYunnan650205China

Mycorrhizal fungi are essential for the growth and development of both epiphytic(growing on trees)and lithophytic(growing on rocks)*** studies indicate that in lowland tropical areas,orchid mycorrhizal fungal compositions are correlated with the life form(i.e.,epiphytic,lithophytic,or terrestrial)of their host *** therefore tested if a similar correlation exists in an orchid distributed at higher *** corymbosa is an endangered ornamental orchid species that can be found as a lithophyte and epiphyte in subtropical to subalpine *** on high-throughput sequencing of the fungal internal transcribed spacer 2(ITS2)-rDNA region of mycorrhizae of ***,we detected 73 putative mycorrhizal fungal Operational Taxonomic Units(OTUs).The OTUs of two dominant lineages(Cantharellales and Sebacinales)detected from *** are phylogenetically different from those of other species within the genus Coelogyne,indicating that different orchid species prefer specific mycorrhizal *** also found that the Non-metric multidimensional scaling(NMDS)plots of orchid mycorrhizal fungi were not clustered with life form,the variations among orchid mycorrhizal fungal communities of different life forms were not significant,and most of the OTUs detected from epiphytic individuals were shared by the lithophytic plants,suggesting that orchid mycorrhizal associations of *** were not affected by life *** findings provide novel insights into mycorrhizal associations with endangered ornamental orchids.

关键词： Cantharellales Coelogyninae Epiphytic Life form Orchid mycorrhizal fungi Serendipitaceae

Differences in leaf physiological and morphological traits between Camellia japonica and Camellia reticulata

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Plant Diversity 2020年第3期42卷 181-188页

作者： ji-hua wang Yan-Fei Cai Shi-Feng Li Shi-Bao Zhang Flower Research Institute of Yunnan Academy of Agricultural Sciences KunmingChina Key Laboratory for Economic Plants and Biotechnology Kunming Institute of BotanyChinese Academy of SciencesKunmingChina National Engineering Research Center for Ornamental Horticulture KunmingChina

Plants of the genus Camellia are widely cultivated throughout the world as ornamentals because of their bright and large *** widely cultivated varieties are mainly derived from the mutant lines and hybrid progenies of Camellia japonica *** Camellia reticulata *** their geographical distributions and environmental adaptabilities are significantly different,no systematic comparison has been conducted between these two *** investigate differences in how these plants have adapted to their environments,we measured photosynthesis and 20 leaf functional traits of *** and *** grown under the same *** with ***,*** showed higher values for light saturation point,light-saturated photo synthetic rate,leaf dry mass per unit area and stomatal area,but lower values for apparent quantum efficiency,leaf size,stomatal density and leaf nitrogen content per unit *** area was positively correlated with light-saturated photosynthetic rate and light saturation point,but negatively correlated with stomatal *** differences between *** and *** were mainly reflected in their adaptations to light intensity and leaf morphological *** is better adapted to high light intensity than *** difference is related to the two species’ differing life fo ***,leaf morphological traits have played an important role in the light adaptation of *** and ***,and might be first noticed and selected during the breeding *** findings will contribute to the cultivation of camellia plants.

关键词： Camellia Light adaptation Leaf traits Ornamental plant Photosynthesis

The Feasibility of Immobilization of Bioflocculant-producing Bacteria Using Mycelial Pellets as Biomass Carriers

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Journal of Harbin Institute of Technology(New Series) 2013年第3期20卷 1-6页

作者： jin-Na wang Fang Ma jing-Bo Guo ji-Xian Yang Ang Li ji-hua wang State Key Lab of Urban Water Resource and Environment Harbin Institute of Technology School of Civil and Architecture Engineering Northeast Dianli University School of Life Science and Technology Harbin Normal University

Bioflocculant-producing bacteria Agrobacterium tumefaciens F2 and Bacillus sphaeicus F6 were immobilized onto mycelial pellets to investigate the bioflocculant-producing potential of this combined organism and the corresponding flocculating efficiency. The atomic force microscope ( AFM) images of mycelial surface indicate that the mycelia pellet can immobilize bioflocculant-producing bacteria F2 and F6 as a biomass carrier. The flocculating efficiency of bioflocculant produced by this combined organism was studied under the optimum flocculating conditions obtained by Response Surface Methodology ( RSM ) . The fermentation yield of the combined mycelial pellet is about 2. 6 g / L,which is higher than that of the free bacteria ( only 2. 2 g / L) . Flocculating efficiency of the combined mycelial pellet was comparable with that of bioflocculant generated by the free bacteria. The bioflocculant yield is enhanced and the flocculating efficiency of the co-culture is uninfluenced after immobilized with mycelial pellet as a carrier. In conclusion,the mycelial pellet is feasible as a biomass carrier for the immobilization of bioflocculant-producing bacteria.

关键词： bioflocculant-producing bacteria combined mycelial pellet immobilization biomass carrier

Chlorophyll Fluorescence Detected Passively by Difference Reflectance Spectra of Wheat （Triticum aestivum L.） Leaf

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Journal of Integrative Plant Biology 2005年第10期47卷 1228-1235页

作者： Yong-jiang ZHANG Chun-jiang ZHAO Liang-Yun LIU ji-hua wang Ren-Chao wang Institute of Agricultural Remote Sensing and Information Application Zhejiang University Hangzhou 310029 China National Engineering Research Center for Information Technology in Agriculture Beijing 100089 China

The chlorophyll fluorescence （CF） signature emitted from vegetation provides an abundance of information regarding photosynthetics activity and has been used as a powerful tool to obtain physiological information of plant leaves in a non-invasive manner. CF is difficult to quantify because the CF signal is obscured by reflected light. In the present study, the apparent reflectance spectra of wheat （Triticum aestivum L.） leaves were measured under illuminations with and without filtering by three specially designed long-wave pass edge filters; the cut-off wavelengths of the three filters were 653.8, 678.2, and 694. l nm at 50% of maximum transmittance. The CF spectra could be derived as the reflectance difference spectra of the leaves under illuminations with and without the long wave pass edge filters. The ratio of the reflectance difference at 685 and 740 nm （Dif685/Dif740） was linear correlated with the CF parameters （maximal photochemical efficiency Fv/Fm, and the yield of quantum efficiency） measured by the modulated fluorometer. In addition, the ratio reflected the water stress status of the wheat leaf, which was very high when water deficiency was serious. This method provides a new approach for detecting CF and the physiological state of crops.

关键词： chlorophyll fluorescence (CF) passive remote sensing reflectance spectrum wheat.

N-acetylcysteine protects against cadmium-induced germ cell apoptosis by inhibiting endoplasmic reticulum stress in testes

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Asian Journal of Andrology 2013年第2期15卷 290-296,I0010页

作者： Yan-Li ji hua wang Cheng Zhang Ying Zhang Mei Zhao Yuan-hua Chen De-Xiang Xu Department of Toxicology School of Public Health Anhui Medical University Hefei 230032 China

Cadmium （Cd） is a reproductive toxicant that induces germ cell apoptosis in the testes. Previous studies have demonstrated that endoplasmic reticulum （ER） stress is involved in Cd-induced germ cell apoptosis. The aim of the present study was to investigate the effects of N-acetylcysteine （NAC）, an antioxidant, on Cd-induced ER stress and germ cell apoptosis in the testes. Male CD-1 mice were intraperitoneally injected with CdCl2 （2.0 mg kg^-1）. As expected, acute Cd exposure induced germ cell apoptosis in the testes, as determined by terminal dUTP nick-end labelling （TUNEL）. However, the administration of NAC alleviated Cd-induced germ ceil apoptosis in the testes. Further analysis showed that NAC attenuated the Cd-induced upregulation of testicular glucose-regulated protein 78 （GRP78）, an important ER molecular chaperone. Moreover, NAC inhibited the Cd-induced phosphorylation of testicular eukaryotic translation initiation factor 2a （elF2a）, a downstream target of the double-stranded RNA-activated kinase-like ER kinase （PERK） pathway. In addition, NAC blocked the Cd-induced activation of testicular X binding protein （XBP）-1, indicating that NAC attenuates the Cd-induced ER stress and the unfolded protein response （UPR）. Interestingly, NAC almost completely prevented the Cd-induced elevation of C/EBP homologous protein （CHOP） and phosphorylation of c-Jun N-terminal kinase （.INK）, two components of the ER stress-mediated apoptotic pathway. In conclusion, NAC protects against Cd-induced germ cell apoptosis by inhibiting endoplasmic reticulum stress in the testes.

关键词： antioxidant apoptosis cadmium endoplasmic reticulum stress N-acetylcysteine (NAC) testis unfolded protein response

Structure-based simulations complemented by conventional all-atom simulations to provide new insights into the folding dynamics of human telomeric G-quadruplex

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Chinese Physics B 2021年第7期30卷 646-654页

作者： Yun-Qiang Bian Feng Song Zan-Xia Cao jia-Feng Yu ji-hua wang Shandong Key Laboratory of Biophysics Institute of BiophysicsDezhou UniversityDezhou 253023China

The hybrid atomistic structure-based model has been validated to be effective in investigation of G-quadruplex *** this study,we performed large-scale conventional all-atom simulations to complement the folding mechanism of human telomeric sequence Htel24 revealed by a multi-basin hybrid atomistic structure-based ***,the real time-scale of folding rate,which cannot be obtained from the structure-based simulations,was estimated directly by constructing a Markov state *** results show that Htel24 may fold as fast as on the order of milliseconds when only considering the competition between the hybrid-1 and hybrid-2 G-quadruplex ***,in comparison with the results of structure-based simulations,more metastable states were identified to participate in the formation of hybrid-1 and hybrid-2 *** findings suggest that coupling the hybrid atomistic structure-based model and the conventional all-atom model can provide more insights into the folding dynamics of DNA *** a result,the multiscale computational framework adopted in this study may be useful to study complex processes of biomolecules involving large conformational changes.

关键词： molecular dynamics simulation structure-based model all-atom model DNA G-quadruplex

Geometrical study on diseaserelated ncRNAs based on Z-curve method

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Health 2009年第1期1卷 24-30页

作者： Yan-Ling Yang ji-hua wang Key Lab for Biophysics Universities of Shandong Physics Department De Zhou University

The Z curve is a very useful method for visual-izing and analyzing DNA sequences. It is a three-dimensional space curve that constitutes a unique representation of a given DNA se-quence. It becomes more and more important to study non-coding regions in the recent years. Using Z curve method, 15 disease-related ncRNAs and some snoRNAs and miRNAs sequences are selected from the NONCODE database in this paper, which relate to Alzheimer Disease. The corresponding Z curves of the studied ncRNAs, sequences have been mapped and compared. The statistical features of the Z curves are ob-tained. These features indicate that the ncRNAs sequences playing same roles in the celluar process have almost the same Z-curves. And the base content in these sequences is almost same too.

关键词： Non-CodingRNA Alzheimer Disease snoRNA miRNA Z-Curve

Folding rate prediction using complex network analysis for proteins with two- and three-state folding kinetics

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Journal of Biomedical Science and Engineering 2009年第8期2卷 644-650页

作者： Hai-Yan Li ji-hua wang Key Lab of Biophysics in Universities of Shandong Dezhou University

It is a challenging task to investigate the different in- fluence of long-range and short-range interactions on two-state and three-state folding kinetics of protein. The networks of the 30 two-state proteins and 15 three-state proteins were constructed by complex networks analysis at three length scales: Protein Contact Networks, Long-range Interaction Networks and Short-range Interaction Networks. To uncover the relationship between structural properties and folding kinetics of the proteins, the correlations of protein network parameters with protein folding rate and topology parameters contact order were analyzed. The results show that Protein Contact Networks and Short-range Interaction Networks (for both two-state and three-state proteins) exhibit the “small-world” property and Long-range Interaction networks indicate “scale-free” behavior. Our results further indicate that all Protein Contact Networks and Short- range Interaction networks are assortative type. While some of Long-range Interaction Networks are of assortative type, the others are of disassortative type. For two-state proteins, the clustering coefficients of Short-range Interaction Networks show prominent correlation with folding rate and contact order. The assortativity coefficients of Short-range Interaction Networks also show remarkable correlation with folding rate and contact order. Similar correlations exist in Protein Contact Networks of three-state proteins. For two-state proteins, the correlation between contact order and folding rate is determined by the numbers of local contacts. Short- range interactions play a key role in determining the connecting trend among amino acids and they impact the folding rate of two-state proteins directly. For three-state proteins, the folding rate is determined by short-range and long-range interactions among residues together.

关键词： Protein Contact Networks Small-World Scale-Free Assortative Type Folding Rate