Jilin Provincial Academy of Forestry science

Changchun, China

Jilin Provincial Academy of Forestry science

Changchun, China
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Song L.-W.,Jilin Provincial Academy of Forestry science | Cao L.-M.,Chinese Academy of Forestry | Li X.-P.,Jilin Provincial Academy of Forestry science | Yang Z.-Q.,Chinese Academy of Forestry | Chen Y.-Q.,Jilin Provincial Academy of Forestry science
Annals of the Entomological Society of America | Year: 2017

Baryscapus dioryctriae Yang & Song sp. nov. (Hymenoptera: Eulophidae), a gregarious pupal and larval endoparasitoid of Dioryctria pryeri Ragonot and Dioryctria abietella Denis & Schiffermü ller (Lepidoptera: Pyralidae) is described and illustrated. The hosts are serious pests of the cones, seeds, and twigs of Pinus koraiensis Sieb. & Zucc., a predominant forest tree species in the northeastern China. The parasitoid has potential as a biocontrol agent for the pests, as an average parasitism rate of 19.5% has been observed and 87.7 parasitoid adults (range 41-138) emerge from a single host. Detailed photographs of the key characters of the female and male of the new species are provided. Type specimens were deposited in Insect Museum, Chinese Academy of Forestry, Beijing, and the Insect Collection of Jilin Provincial Academy of Forestry, Changchun, Jilin Province, China, as well as China National Insect Collection at Institute of Zoology, Chinese Academy of Sciences, Beijing. © The Authors 2017. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved.

Binyameen M.,Swedish University of Agricultural Sciences | Binyameen M.,Bahauddin Zakariya University | Jankuvova J.,Slovak Academy of Sciences | Blazenec M.,Slovak Academy of Sciences | And 7 more authors.
Functional Ecology | Year: 2014

The sense of smell is crucial for fitness of most animals, enabling them to find mates, food and egg laying sites and to stay away from danger. Hence, odour molecules are detected by sensitive and specific olfactory sensory neurons (OSNs). In insects, the OSNs are stereotypically grouped into olfactory sensilla located mainly on the antennae. The functional significance of this co-localization principle is poorly understood, but it has been hypothesized that it allows for coincidence detection of odour filaments, improving discrimination of closely separated odour sources. Using an insect in its natural environment, we conducted the first experimental test of the hypothesis. We manipulated the distance between odour sources of an attractive pheromone and either of two host-derived attraction antagonists (1,8-cineole and verbenone) and investigated the effect on trap catches of the bark beetle, Ips typographus (Coleoptera). 1,8-Cineole is detected by an OSN co-localized with an OSN for one of the pheromone components, while verbenone is detected by OSNs in other sensilla, not co-localized with pheromone OSNs. Consistent with the hypothesis, trap catch increased with distance between odour sources more for 1,8-cineole than for verbenone. The strongest effect was found among the males, that is the sex that first locates and attacks the host tree. Our data from the beetle provide, for the first time, direct experimental support for the hypothesis that co-localization of OSNs in sensilla improves the discrimination of closely separated odour sources. Thus, selection for improved odour source discrimination could well be one of the factors explaining the strict co-localization of OSNs that is seen across the Insecta class. © 2014 British Ecological Society.

Wang C.,Northeast Forestry University | Zhang D.-W.,Jilin Provincial Academy of Forestry science | Wang Y.-C.,Northeast Forestry University | Zheng L.,Northeast Forestry University | Yang C.-P.,Northeast Forestry University
Molecular Biology Reports | Year: 2012

Glycine-rich RNA-binding proteins (GRPs) are involved in post-transcriptional regulation of genes, which have been found to play a role in stress response. However, whether GRPs can mediate some physiological responses related to salt stress tolerance is still not known. In the present study, we investigated the role of GRPs in salt stress-induced physiological responses by generating transgenic tobacco lines overexpressing a GRP (LbGRP1) gene from Limonium bicolor (Bunge) Kuntze. Compared with wild type (WT) tobacco, the transgenic plants showed significantly improved superoxide dismutase and catalase activities under salt stress conditions. Levels of proline in the transgenic plants were significantly higher than those in the WT plants grown under NaCl stress conditions. Furthermore, Na + content and Na +/K + ratio in the transgenic plants were lower than those in the WT plants under both normal growth and stress conditions. These results suggested that overexpression of the LbGRP1 gene can affect some physiological processes associated with salt tolerance of plants. Therefore, we hypothesize that LbGST1 can enhance stress resistance by mediating some physiological pathways. © 2011 Springer Science+Business Media B.V.

Jia S.,CAS Changchun Northeast Institute of Geography and Agroecology | Jia S.,Northeast Forestry University | McLaughlin N.B.,Agriculture and Agri Food Canada | Gu J.,Northeast Forestry University | And 2 more authors.
Tree Physiology | Year: 2013

Tree roots are highly heterogeneous in form and function. Previous studies revealed that fine root respiration was related to root morphology, tissue nitrogen (N) concentration and temperature, and varied with both soil depth and season. The underlying mechanisms governing the relationship between root respiration and root morphology, chemistry and anatomy along the root branch order have not been addressed. Here, we examined these relationships of the first-to fifth-order roots for near surface roots (0-10 cm) of 22-year-old larch (Larix gmelinii L.) and ash (Fraxinus mandshurica L.) plantations. Root respiration rate at 18 °C was measured by gas phase O2 electrodes across the first five branching order roots (the distal roots numbered as first order) at three times of the year. Root parameters of root diameter, specific root length (SRL), tissue N concentration, total non-structural carbohydrates (starch and soluble sugar) concentration (TNC), cortical thickness and stele diameter were also measured concurrently. With increasing root order, root diameter, TNC and the ratio of root TNC to tissue N concentration increased, while the SRL, tissue N concentration and cortical proportion decreased. Root respiration rate also monotonically decreased with increasing root order in both species. Cortical tissue (including exodermis, cortical parenchyma and endodermis) was present in the first three order roots, and cross sections of the cortex for the first-order root accounted for 68% (larch) and 86% (ash) of the total cross section of the root. Root respiration was closely related to root traits such as diameter, SRL, tissue N concentration, root TNC : tissue N ratio and stele-to-root diameter proportion among the first five orders, which explained up to 81-94% of variation in the rate of root respiration for larch and up to 83-93% for ash. These results suggest that the systematic variations of root respiration rate within tree fine root system are possibly due to the changes of tissue N concentration and anatomical structure along root branch orders in both tree species, which provide deeper understanding in the mechanism of how root traits affect root respiration in woody plants. © 2013 The Author.

Jia S.,CAS Changchun Northeast Institute of Geography and Agroecology | Jia S.,Northeast Forestry University | Wang Z.,Northeast Forestry University | Li X.,Jilin Provincial Academy of Forestry science | And 3 more authors.
Plant and Soil | Year: 2010

The response of belowground biological processes to soil N availability in Larix gmelinii (larch) and Fraxinus mandshurica (ash) plantations was studied. Soil and root respiration were measured with Li-Cor 6400 and gas-phase O2 electrodes, respectively. Compared with the control, N fertilization induced the decreases of fine root biomass by 52% and 25%, and soil respiration by 30% and 24% in larch and ash plantations, respectively. The average soil microbial biomass C and N were decreased by 29% and 42% under larch stand and 39% and 47% under ash stand, respectively. While the fine root tissue N concentration under fertilized plots was higher 26% and 12% than that under control plots, respectively, the average fine root respiration rates were increased by 10% and 13% in larch and ash stands under fertilized plot, respectively. Soil respiration rates showed significantly positive exponential relationships with soil temperature, and a seasonal dynamic. These findings suggest that N fertilization can suppress fine root biomass at five branch orders (<2 mm in diameter), soil respiration, and soil microbial biomass C and N, and alter soil microbial communities in L. gmelinii and F. mandshurica plantations. © 2010 Springer Science+Business Media B.V.

Li C.,Northeast Forestry University | Zhang X.,Jilin Provincial Academy of Forestry Science
Chinese Journal of Chromatography (Se Pu) | Year: 2010

A high performance liquid chromatographic (HPLC) method was developed for the simultaneous determination of lobetyolin> pachymic acid> glycyrrhizic acid> atractylenoide M and atractylenolide I in Sijunzi bolus. The separation was performed on an HIQ SIL C l8 V column (250 mm x4. 6 mm, 5 m) with 0. 5% acetic acid-methanol as the mobile phase of gradient elution at a flow rate of 1. 0 mL/min. The detection was performed with an evaporation light scattering detector (ELSD) and the sample volume was 10 L. The temperature of drift tube and heating grade of nebulizer was respectively set at 55 oC and 60% at 0. 2 MPa of pressure. Nitrogen gas was used as carrier gas. Under the optimized conditions; there were good linear relationships between the logarithm values of mass concentration and the peak areas of lobetyolin, pachymic acid, glycyrrhizic acid, atractylenoide M and atractylenolide I in the ranges of 0. 076-1.21, 0.048-0. 76, 0. 153-2.45, 0.045-0.72 and 0. 098-1.56 g/L, respectively. The recoveries of the five components were between 97. 13% and 100. 25%, the relative standard deviations (RSDs) were between 1.23% and 2.44%. This method is simple, rapid, accurate and suitable for the quality control of Sijunzi bolus.

Jia S.,CAS Changchun Northeast Institute of Geography and Agroecology | Jia S.,Northeast Forestry University | Wang Z.,Northeast Forestry University | Li X.,Jilin Provincial Academy of Forestry science | And 2 more authors.
Tree Physiology | Year: 2011

Root respiration is closely related to root morphology, yet it is unclear precisely how to distinguish respiration-related root physiological functions within the branching fine root system. Root respiration and tissue N concentration were examined for different N fertilization treatments, sampling dates, branch orders and temperatures of larch (Larix gmelinii L.) and ash (Fraxinus mandshurica L.) using the excised roots method. The results showed that N fertilization enhanced both root respiration and tissue N concentration for all five branch orders. The greatest increases in average root respiration for N fertilization treatment were 13.30% in larch and 18.25% in ash at 6°C. However, N fertilization did not change the seasonal dynamics of root respiration. Both root respiration and root tissue N concentration decreased with increase in root branch order. First-order (finest) roots exhibited the highest respiration rates and tissue N concentrations out of the five root branch orders examined. There was a highly significant linear relationship between fine root N concentration and root respiration rate. Root N concentration explained >60% of the variation in respiration rate at any given combination of root order and temperature. Root respiration showed a classical exponential relationship with temperature, with the Q 10 for root respiration in roots of different branching orders ranging from 1.62 to 2.20. The variation in root respiration by order illustrates that first-order roots are more metabolically active, suggesting that roots at different branch order positions have different physiological functions. The highly significant relationship between root respiration at different branch orders and root tissue N concentration suggests that root tissue N concentration may be used as a surrogate for root respiration, simplifying future research into the C dynamics of rooting systems. © The Author 2011. Published by Oxford University Press. All rights reserved.

Zhang Z.,CAS Changchun Northeast Institute of Geography and Agroecology | Lu X.,CAS Changchun Northeast Institute of Geography and Agroecology | Song X.,CAS Changchun Northeast Institute of Geography and Agroecology | Song X.,University of Chinese Academy of Sciences | And 2 more authors.
Journal of Soils and Sediments | Year: 2012

Purpose: The theory of ecological stoichiometry has improved understanding of nutrient circulation processes in ecosystems. The purpose of this work was to study ecological stoichiometric characteristics of carbon, nitrogen and phosphorus in wetland soils of Sanjiang Plain, northeast China. Materials and methods: A Deyeuxia angustifolia wetland (swamp meadow) and a Carex lasiocarpa wetland (marsh) were chosen for collection of soil cores (0-30 cm depth). Soil organic carbon, total nitrogen and phosphorus were analyzed to study patterns of C/N (RCN), C/P (RCP), N/P (RNP), and C/N/P (RCNP) in wetland soils. Results and discussion: Soil carbon, nitrogen and phosphorus stoichiometry differed between the two wetlands. Soil RCN (0-30 cm depth) in the D. angustifolia wetland was close to that in C. lasiocarpa wetland (12. 97 and 12. 80, respectively), but RCP and RNP in C. lasiocarpa soils were significantly higher than those in D. angustifolia soils. RCN changed little within soil profile, without obvious trends in both wetlands. Both RCP and RNP decreased with depth from the surface, and both RCP and RNP were higher at every depth interval in C. lasiocarpa soils compared to D. angustifolia soils. RCN in surface soil (0-10 cm, organic-rich "Lo" layer) was not significantly different from RCN in the entire profile (0-30 cm, "La layer") of D. angustifolia wetland, while RCP and RNP were both significantly different between the Lo and La layers. In Carex lasiocarpa wetland, RCN, RCP and RNP in Lo layer were significant higher than those in La layer. RCNP in La layer of D. angustifolia and C. lasiocarpa wetlands were 65:5:1 and 163:13:1, respectively. Conclusions: Soil RCN was relatively consistent, while RCP and RNP reflected P limitation in wetlands of Sanjiang Plain. Further research is needed to determine whether these ratios hold among other wetland ecosystems. © 2012 Springer-Verlag.

Duan J.,Beijing Forestry University | Xu C.,Beijing Forestry University | Jacobs D.F.,Purdue University | Ma L.,Beijing Forestry University | And 4 more authors.
Scandinavian Journal of Forest Research | Year: 2013

Traditional nursery culture of Changbai larch (Larix olgensis Henry) in Northeast China requires up to a 2-year nursery production period. The high cost of seedling culture for this duration has been identified as a constraint. As a potential means to help to shorten the cultural period, we evaluated growth, biomass accumulation, and nitrogen (N) uptake dynamics of 1-year-old seedlings subjected to nutrient-loading treatments at intensive rates of 500 mg N seedling-1 supplied exponentially (E500) and 135 mg N seedling-1 supplied exponentially (E135) or conventionally (constant). Also included were an unfertilized control and the standard fertilizer regime for 2-year-old seedling production (77 mg N seedling-1 supplied conventionally over 2 years). At the end of nursery culture, though seedlings in the constant treatment had more biomass and N accumulation at the whole-seedling level, much of this was allocated to needles. While seedlings in the E500 treatment exhibited signs of toxicity, those in the E135 treatment had equivalent end-of-nursery N concentration in woody tissues to those produced over 2 years; root collar increment and survival 69 d after outplanting were also similar. Our results suggest that exponential nutrient loading at an optimal rate could increase available nutrient reserves in woody tissues of deciduous tree seedlings, therefore having the potential to improve seedling performance after outplanting. © 2013 Copyright Taylor and Francis Group, LLC.

Kong W.Y.,Jilin Provincial Academy of Forestry science
Dong wu xue yan jiu = Zoological research / "Dong wu xue yan jiu" bian ji wei yuan hui bian ji | Year: 2013

In autumn of 2008 and 2009, we studied the foraging habitat selection of Siberian Crane (Grus leucogeranus) in the Momoge Nature Reserve of Jilin province. Using the resource selection index, resource selection functions, and the chi-squared test, we found that the Siberian Crane exhibited selectivity in their preferred foraging environments in relation to the distance to human disturbances, vegetation density, coverage and height, foraging vegetation density and water level. Interestingly, this selectivity in regards to large scale disturbances was lower than other factors. The characteristics of favorite foraging habits of Siberian Cranes include a variety of factors: a distance >5 000 m from a national highway, >1 500 m from a non-gravel road, >1 000 m from the nearest road, >1 000 m from a residential area, >1 000 m from farmland; plant density between 20 and 50 grass/m(2); plant coverage lower than 10%; plant height lower than 20 cm; Scirpus planiclmis density between 1 and 50 grass/m(2); Scirpus triqueter density between 1 and 10 grass/m(2); and the water level between 40 and 60 cm. The resource selection functions of Siberian Crane foraging habitat in autumn can be described thusly: Logistic (P) = 0.663 + 0.565×distance to national highway + 0.042×distance to non-gravel road + 0.519×distance to the nearest road + 0.353×distance to residential area + 0.169×distance to farmland - 0.455×vegetation density - 0.618×vegetation coverage - 0.548×vegetation height - 0.158×Scirpus planiclmis density - 0.404×Scirpus triqueter density + 0.920×water level,T (x) =e(Logistic(p)) / [1 + e(Logistic(p))], with an overall prediction accuracy of 82.9%.

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