Hubei Forestry Academy

Wuhan, China

Hubei Forestry Academy

Wuhan, China
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Deng Y.-P.,Chinese Academy of Forestry | Lei J.-P.,Chinese Academy of Forestry | Lei J.-P.,Nanjing Forestry University | Pan L.,Hubei Forestry Academy | And 3 more authors.
Forest Research | Year: 2016

Objective: To compare the differences of seed morphological characters among provinces of Quercus variabilis Bl., and explore the adaptive growth status of seedlings growing in the central distribution area. Method: The seeds of 6 Q. variabilis provenances from six provinces were collected, and the seedlings were cultivated and transplanted to experimental field in the centre of natural distribution range (Wuhan Jiufeng National Forest Park), then the seed morphology and one-year seedling growth traits were surveyed. Result: (1)There were significant or extremely significant differences among provenances in seed length, seed width, seed length/width ratio and 100-seed mass, the order of seed length among provenances was Beijing Provenance (22.28 mm),Hubei Provenance (22.10 mm), He'nan Provenance (20.80 mm), Shaanxi Provenance (19.57 mm), Yunnan Provenance (18.93 mm)and Liaoning Provenance (18.81 mm), the seed width of Beijing Provenance (19.71 mm) and Hubei Provenance (19.16 mm) was higher than that of the others, the seed length/width ratio of He'nan Provenance (1.38) was extremely significantly higher than that of the others; (2)There were significant or extremely significant differences among provenances in seedling height, ground diameter, leaf number, branching number and seedling height/ground diameter, the Beijing Provenance and Hubei Provenance were better in seedling height and leaf number, which were respectively 19.54 cm and 20.26 cm, 8.32 leaves and 9.50 leaves; (3)A decreasing trend with time for seedling growth traits among provenances was found; (4)There was a positive relationship between seed morphological characters and seedling growth traits except seed length/width ratio; the leaf number was significantly related to ground diameter and branching number and the seedling height and leaf number were closely related to the seed morphological characters; (5)It showed a decreasing trend with the growth time in the relationship between seedling growth traits and 100-seed mass. Conclusion: The seedlings of Beijing Provenance and Hubei Provenance grew better in the experimental field which might be related to their larger seed mass, and the Yunnan Provenance in the south margin and the Liaoning Provenance in the north margin of distribution area of Q. variabilis grew weaker than the provenances in the centre of distribution area. With the effect of climate change, provenances in the margin of distribution area may lose in the community competition in the seedling stage if it cannot take advantage of its dispersal and settlement and affected by the disadvantage of growth and competition, so that the distribution and population renewal would surely be affected. © 2016, Chinese Academy of Forestry. All right reserved.

Induri B.R.,West Virginia University | Ellis D.R.,West Virginia University | Slavov G.T.,West Virginia University | Slavov G.T.,Aberystwyth University | And 5 more authors.
Tree Physiology | Year: 2012

Understanding genetic variation for the response of Populus to heavy metals like cadmium (Cd) is an important step in elucidating the underlying mechanisms of tolerance. In this study, a pseudo-backcross pedigree of Populus trichocarpa Torr. & Gray and Populus deltoides Bart. was characterized for growth and performance traits after Cd exposure. A total of 16 quantitative trait loci (QTL) at logarithm of odds (LOD) ratio ≥2.5 were detected for total dry weight, its components and root volume. Major QTL for Cd responses were mapped to two different linkage groups and the relative allelic effects were in opposing directions on the two chromosomes, suggesting differential mechanisms at these two loci. The phenotypic variance explained by Cd QTL ranged from 5.9 to 11.6 and averaged 8.2 across all QTL. A whole-genome microarray study led to the identification of nine Cd-responsive genes from these QTL. Promising candidates for Cd tolerance include an NHL repeat membrane-spanning protein, a metal transporter and a putative transcription factor. Additional candidates in the QTL intervals include a putative homolog of a glutamate cysteine ligase, and a glutathione-S-transferase. Functional characterization of these candidate genes should enhance our understanding of Cd metabolism and transport and phytoremediation capabilities of Populus. © The Author 2012. Published by Oxford University Press. All rights reserved.

Wang J.,Nanjing Forestry University | Dai X.,Nanjing Forestry University | Chen Y.,Nanjing Forestry University | Yang Y.,Hubei Forestry Academy | And 3 more authors.
Plant OMICS | Year: 2015

Crape myrtles (Lagerstroemia spp.) represent a large group of woody flowing plants. Despite their high ornamental value and popularity, few genomic sequences and marker resources are available for them. Lagerstroemia indica is one of the most widely cultivated crape myrtle species. In this study, we partially sequenced the genome of L. indica using newly updated 454 sequencing technology. Over 1.2 million high-quality reads in a total length of 837.4 Mb were generated. The average read length was 679 bp. Of the reads, 779,744 (63.2%) were assembled into 65,129 contigs covering a physical length of 93.6 Mb and with N50 contig size of 1,648 bp. The contigs were used to recover microsatellites with repeat motifs of 1-6 bp. A total of 33,026 microsatellites were detected. An SSR primer database was established based on the flanking sequences of the detected microsatellites. A PCR survey of subset of these SSR primers revealed that 89.5% amplified successfully, and 66.7% of the loci were polymorphic. The polymorphic information contents of the polymorphic SSRs ranged from 0.08 to 0.79, with an average value of 0.44. This study provided valuable genomic sequences and marker resources for future genetic studies on Lagerstroemia species.

Wan Z.,Nanjing Forestry University | Wan Z.,Huangshan University | Li Y.,Nanjing Forestry University | Chen Y.,Nanjing Forestry University | And 3 more authors.
Phytoparasitica | Year: 2013

Epidemic outbreaks of rust disease have been observed in most of the black cottonwood (Populus trichocarpa) plantations in the south of China in recent years. However, the exact pathogens that cause rust disease in this area remain largely unknown. In this study we collected rust fungi from black cottonwood plantations at four different places in the south of China. Examination of these fungi by scanning electron microscope (SEM) and light microscopy (LM) revealed that the morphological characteristics of urediniospores for all the collected fungi were very close to that of Melampsora larici-populina. Using species-specific primers, these pathogens were confirmed to be M. larici-populina. In a survey on the resistance to rust disease for 88 genotypes of black cottonwood, nine potential candidate genotypes were detected that may be free from infection of rust pathogen. The results of this study provide essential information for breeding new rust-resistant black cottonwood cultivars. © 2013 Springer Science+Business Media Dordrecht.

Li S.,Nanjing Forestry University | Zhang X.,Hubei Forestry Academy | Yin T.,Nanjing Forestry University
Journal of Microbiology and Biotechnology | Year: 2010

In this paper, we analyzed the microsatellites in the transcript sequences of the whole Laccaria bicolor genome. Our results revealed that, apart from the triplet repeats, length diversification and richness of the detected microsatellites positively correlated with their repeat motif lengths, which were distinct from the variation trends observed for the transcriptional microsatellites in the genome of higher plants. We also compared the microsatellites detected in the genic regions and in the nongenic regions of the L. bicolor genome. Subsequently, SSR primers were designed for the transcriptional microsatellites in the L. bicolor genome. These SSR primers provide desirable genetic resources to the ectomycorrhizae community, and this study provides deep insight into the characteristics of the microsatellite sequences in the L. bicolor genome.

Wang R.-L.,Chinese Academy of Forestry | Cheng R.-M.,Chinese Academy of Forestry | Xiao W.-F.,Chinese Academy of Forestry | Feng X.-H.,Chinese Academy of Forestry | And 6 more authors.
Chinese Journal of Applied Ecology | Year: 2012

By the methods of sequential soil cores and buried bags, an investigation was conducted to study the seasonal dynamics of fine roots in a 20-year-old Pinus massoniana plantation in Three Gorges Reservoir Area from March to December 2011, with the annual production and turnover rate of the fine roots calculated. In the plantation, the annual mean biomass of < 2 mm fine roots was 146.98 g · m-2 · a-1, in which, the living root biomass (102.92 g · m-2 · a-1) was far greater than that of the dead root biomass (44.06 g · m-2 · a-1). Among the fine roots with different sizes, < 1 mm fine roots had an obvious seasonal dynamics in their biomass, showing a unimodal curve in the sampling period. The annual production and turnover rate of < 2 mm fine roots were 104.12 g · m-2 · a-1 and 1.05 a-1, respectively, in which, the annual production of < 1 mm and 1-2 mm fine roots was 58.35 and 45.77 g · m-2 · a-1, and the turnover rate was 1.41 and 0.69 a-1, respectively.

Wang R.-L.,Chinese Academy of Forestry | Cheng R.-M.,Chinese Academy of Forestry | Xiao W.-F.,Chinese Academy of Forestry | Feng X.-H.,Chinese Academy of Forestry | And 5 more authors.
Forest Science and Practice | Year: 2013

Environmental heterogeneity is a constant presence in the natural world that significantly affects plant behavior at a variety of levels of complexity. In order to estimate the spatial pattern of fine root biomass in the Three Gorges Reservoir Area, the spatial heterogeneity of fine root biomass in the upper layer of soils (0-10 cm) in three Masson pine (Pinus massoniana) stands in the Three Gorges Reservoir Area, China, was studied in 30 m × 30 m plots with geostatistical analysis. The results indicate that 1) both the live and dead fine root biomass of stand 2 were less than those of other stands, 2) the spatial variation of fine roots in the three stands was caused together by structural and random factors with moderate spatial dependence and 3) the magnitude of spatial heterogeneity of live fine roots ranked as: stand 3 > stand 1 > stand 2, while that of dead fine roots was similar in the three stands. These findings suggested that the range of spatial autocorrelation for fine root biomass varied considerably in the Three Gorges Reservoir Area, while soil properties, such as soil bulk density, organic matter and total nitrogen, may exhibit great effect on the spatial distribution of fine roots. Finally, we express our hope to be able to carry out further research on the quantitative relationship between the spatial heterogeneous patterns of plant and soil properties. © 2013 Beijing Forestry University and Springer-Verlag Berlin Heidelberg.

Wang R.,Chinese Academy of Forestry | Cheng R.,Chinese Academy of Forestry | Xiao W.,Chinese Academy of Forestry | Feng X.,Chinese Academy of Forestry | And 3 more authors.
Shengtai Xuebao/ Acta Ecologica Sinica | Year: 2011

North Subtropical Area of China, located in the transition from warm temperate zone to the subtropical, is more sensitive to environmental changes. Therefore, study on the relationship between masson pine (Pinus Massoniana) tree-ring width data and NDVI in north subtropical region where masson pine growth is more sensitive to changes of climatic factors, is of much importance to reveal how the terrestrial ecosystems respond to global climate change. As the northern boundary of masson pine natural distribution, Nanzheng county of Shanxi Province and Jigongshan National Nature Reserve of Henan Province were selected. Using masson pine tree-ring width indices, monthly normalized difference vegetation index (NDVI) and climatic data from 1982 to 2006, the relationships between tree-ring width indices, NDVI, and climatic data, including monthly mean temperature, precipitation and the Palmer Drought Severity Index (PDSI) were analyzed firstly. Then, the relationship between tree-ring width indices and NDVI of forest was explored. The results showed that North Subtropical vegetation index NDVI was influenced by the hydrothermal conditions, and monthly NDVI was mainly positive to monthly mean temperature, negatively related to monthly mean precipitation and PDSI. In addition, the correlation coefficient between NDVI and temperature was larger than other factors. Masson pine radial growth was positive to temperature of last growing season, while negative to precipitation and PDSI. Temperature and precipitation during the growing season of the same year promoted the pine radial growth, the influences of PDSI on Nanzheng county and Jigognshan were opposite. In northern subtropical region, the relationship between masson pine tree-ring width and forest NDVI was not significant (P > 0. 05). However, NDVI of Nanzheng County in March, August and December were significantly associated with two chronologies, NDVI of Jigongshan region in September associated with the RES chronology with the biggest correlation coefficient. Through analyzing synthetically, we figure out that the tree growth of Nanzheng county was mainly affected by temperature, that of Jigongshan was influenced by the interaction of temperature and precipitation. In conclusion, we imply that long time series of ring width data does not reflect well the long-term vegetation changes in the northern subtropical region, and it is unreasonable to model and reconstruct the long-term vegetation changes and productivity using tree radial growth. Therefore, the further study is still required to reconstruct regional NDVI using tree-ring width chronologies in the North Subtropical Region.

Feng X.-H.,Chinese Academy of Forestry | Cheng R.-M.,Chinese Academy of Forestry | Xiao W.-F.,Chinese Academy of Forestry | Wang R.-L.,Chinese Academy of Forestry | And 3 more authors.
Chinese Journal of Ecology | Year: 2011

Longer growth season has been confirmed due to the elevated temperature in recent decades. Though the changes in the duration of growth season could affect tree productivity, it's unclear how the growth season with different initiating temperature affects the radial growth of tree. In order to investigate the effects of growth season's variability in temperature to the radial growth of Masson pine (Pinus massoniana) and search for the sensitive temperature to the growth, old Masson pine stands in Hanzhong, the northwest margin of north subtropical region, were chosen as test objects, with their tree ring width index chronology from 1945 to 2009 measured by dendrochronology method. The air temperatures on the first day, last day, and in the whole growth season as well as the active accumulative temperature during growth season were determined based on the daily mean temperature of Hanzhong, and the relationships between the temperatures and chronology were analyzed. The results showed that the growth season with initiating temperature 6.0 °C-7.5 °C had negative effects on the tree ring width index chronology, with 6.0 °C being most significan. 10.5 °C on the last day had significant positive effects on tree ring growth. 10.0 °C and 10.5 °C in growth season were significantly positively correlated with the tree ring growth, and the active accumulative temperature during growth season was also significantly positively correlated with the growth. These sensitive temperatures were respectively corresponding to the onset of photosynthesis, needle emergence in spring, and shutting down of cambium activity in autumn. Our study suggested that elevated temperature led to the changes in phenophase, and thereby, affected the radial growth of P. massoniana in Hanzhong.

Chen Y.,Chinese Academy of Forestry | Cui Q.,Chinese Academy of Forestry | Xu Y.,Hubei Forestry Academy | Yang S.,Chinese Academy of Forestry | And 2 more authors.
Molecular Genetics and Genomics | Year: 2015

Genetic engineering to produce valuable lipids containing unsaturated fatty acids (UFAs) holds great promise for food and industrial applications. Efforts to genetically modify plants to produce desirable UFAs with single enzymes, however, have had modest success. The key enzymes fatty acid desaturase (FAD) and diacylglycerol acyltransferase (DGAT) are responsible for UFA biosynthesis (a push process) and assembling fatty acids into lipids (a pull process) in plants, respectively. To examine their roles in UFA accumulation, VfFAD2 and VfDGAT2 genes cloned from Vernicia fordii (tung tree) oilseeds were conjugated and transformed into Rhodotorula glutinis and Arabidopsis thaliana via Agrobacterium tumefaciens. Real-time quantitative PCR revealed variable gene expression levels in the transformants, with a much higher level of VfDGAT2 than VfFAD2. The relationship between VfFAD2 expression and linoleic acid (C18:2) increases in R. glutinis (R2 = 0.98) and A. thaliana (R2 = 0.857) transformants was statistically linear. The VfDGAT2 expression level was statistically correlated with increased total fatty acid content in R. glutinis (R2 = 0.962) and A. thaliana (R2 = 0.8157) transformants. With a similar expression level between single- and two-gene transformants, VfFAD2-VfDGAT2 co-transformants showed a higher linolenic acid (C18:3) yield in R. glutinis (174.36 % increase) and A. thaliana (14.61 % increase), and eicosatrienoic acid (C20:3) was enriched (17.10 % increase) in A. thaliana. Our data suggest that VfFAD2-VfDGAT2 had a synergistic effect on UFA metabolism in R. glutinis, and to a lesser extent, A. thaliana. These results show promise for further genetic engineering of plant lipids to produce desirable UFAs. © 2015, Springer-Verlag Berlin Heidelberg.

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