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larix olgensis growth-climate response between lower and upper elevation limits:an intensive study along the eastern slope of the Changbai Mountains,northeastern China

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Journal of Forestry Research 2020年第1期31卷 231-244页

作者： Jian Yu Qijing Liu Forestry College Beijing Forestry University

larix olgensis is a dominant tree species in the forest ecosystems of the Changbai Mountains of northeast *** assess the growth response of this species to global climate change,we developed three tree-ring width and biomass chronologies across a range of elevations in the subalpine forests on the eastern slope of the Changbai *** used dendroclimatic analyses to study key factors limiting radial growth in *** and its variation with *** statistical characteristics of chronologies suggested that elevation is a determinant of tree growth patterns in the study *** function analysis of chronologies with climate factors indicated that climate–growth relationships changed with increasing elevation:tree growth at high elevation was strongly limited by June temperatures of the previous year,and as elevation decreases,the importance of temperature decreased;tree radial growth at mid-elevation was mainly controlled by precipitation towards the end of the growing season of the current *** chronologies reflected a stronger climatic signal than tree-ring width *** correlation with gridded climate data revealed that our chronologies contained a strong regional temperature signal for northeast *** growing below timberline appeared to be more sensitive to climate,thus optimal sites for examining growth trends as a function of climate variation are considered to be just below *** study objective was to provide information for more accurate prediction of the growth response of *** to future climate change on the eastern slope of the Changbai Mountains,and to provide information for future climate reconstructions using this tree species in humid and semi humid regions.

关键词： Tree-ring width Dendrochronology Changbai Mountains Elevation gradient Timberline larix olgensis

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Preliminary analysis of two NAC transcription factor expression patterns in larix olgensis

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Journal of Forestry Research 2022年第2期33卷 601-609页

作者： Qing Cao Peiqi An Sufang Zhang Junhui Wang Hanguo Zhang Lei Zhang State Key Laboratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbin 150040People’s Republic of China Chinese Academy of Forestry Beijing 100000People’s Republic of China

The NAC transcription factor family is plant-specific with various biological ***,there are few studies on the NAC gene involving coniferous *** research and expression analysis of NAC genes in larix olgensis can be used to analyse the function of the NAC gene in the *** of excellent genetic materials and molecular breeding have been utilized to cultivate high-quality,stress-resistant *** to the transcriptome data for ***,the genes Uni-gene81490 and Unigene70699 with complete ORFs(open reading frames)were obtained by conserved domain analy-sis and named LoNAC1 and LoNAC2,*** cDNAs of LoNAC1 and LoNAC2 were 1971 bp and 1095 bp in length,encoding 656 and 364 amino acids,*** molecular weights of the proteins encoded by the two genes were predicted to be 72.61 kDa and 41.13 kDa,and subcellular localization analysis indicated that the proteins were concentrated in the *** results of real-time quantitative PCR analysis showed that at different growth stages and in different tissues of ***,the relative expression levels of the two NAC genes were highest in the stem,and the expression differences were more obvious in non-lignified *** drought,salt and alkali stress and hormone treatment,expression was induced to different *** expression levels of LoNAC1 and LoNAC2 in semi-lignified *** were higher than in the other two periods(non-lignified and lignified),and expression levels significantly increased under drought and salt *** expression levels changed under hormone *** is speculated that these two genes may not only be related to drought and salt stress and secondary growth but may also be induced by hormones such as abscisic ***,LoNAC1 and LoNAC2 are genetic materials that can be used for molecular breeding of larch.

关键词： larix olgensis NAC transcription factor Bioinformatics analysis Expression patterns

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Genetic variation and superior provenances selection for wood properties of larix olgensis at four trials

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Journal of Forestry Research 2022年第6期33卷 1867-1879页

作者： Heng Zhang Shikai Zhang Shuopeng Chen Dean Xia Chuanping Yang Xiyang Zhao State Key Laboratory of Tree Genetics and Breeding School of ForestryNortheast Forestry UniversityHarbin 150040People’s Republic of China

larix olgensis,one of the most important timber species in northeastern China,is used for paper making and *** this study,10 wood properties(wood density,fiber length,fiber width,fiber length-to width ratio,hemicellulose content,cellulose content,holocellulose content,lignin content,ash content,and carbon content)of 10 provenances of *** planted at sites of CuoHai(CH),JiaGeDaQi(JGDQ),LiangShui(LS),and Mao'erShan(MES)were *** results of ANOVA showed that almost traits differed significantly among locations and provenances,with a significant interaction *** trait also differed significant among provenances within *** phenotypic and genetic coefficient of variation(PCV and GCV)and provenance heritability(H 2)for wood properties ranged from 1.122 to 27.365%,from 0.564%to 21.113%and from 0.332 to 0.996,respectively.A correlation analysis showed that wood density was significantly negatively correlated with cellulose content and holocellulose content at sites CH,JGDQ,and LS,but were significantly positively correlated at site *** density was significantly negatively correlated with lignin content at CH and JGDQ,but not at LS and *** width(FW)was negatively correlated with the ratio of fiber length(FL)to width across sites,and FW and FL/W were all positively correlated with *** content was significantly positively correlated with hemicellulose content at site JGDQ and significantly negatively correlated with cellulose content and with holocellulose content at site ***,carbon content was positively correlated with cellulose content and holocellulose content at CH,but negatively correlated with these two traits at site *** a correlation analysis of wood properties with geographic,soil and climatic characteristics at the four sites,wood properties were mainly correlated with latitude and altitude of the site and affected by the average annual precipitation and temperature *** select supe

关键词： larix olgensis Wood properties Genetic variation Provenance selection Carbon content

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Exogenous application of succinic acid enhances tolerance of larix olgensis seedling to lead stress

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Journal of Forestry Research 2018年第6期29卷 1497-1505页

作者： Jinfeng Song Hongguang Zhang Chengwei Duan Xiaoyang Cui School of Forestry Northeast Forestry University Maoershan Forest Research Station Northeast Forestry University

larix olgensis A. Henry(Changbai larch) is a productive commercial species and good candidate for afforestation in northeast China. It is widely planted in lead-stressed soils which can induce oxidative damage in this plant. Increasing tolerance to lead(Pb) stress is therefore of keen interest. A greenhouse experiment was conducted to identify the biomass, physiological responses and Pb accumulation of L. olgensis seedlings to Pb stress under succinic acid(SA) application and to explore the interaction of exogenous SA applications and stress resistance. L. olgensis seedlings were planted in Pb-stressed or unstressed haplic cambisols in pots. In Pb-contaminated soils the seedlings were treated daily with concentrations of SA solutions at a rate approximately equivalent to 0, 0.04,0.2, 1.0, or 2.0 mmol kg-1of soil for 10, 20, and 30 days,respectively. Pb treatment induced damage in the seedlings and led to the inhibition of biomass accumulation in roots,stems and leaves, and a rise in Pb accumulation in fine roots and leaves. Malondialdehyde(MDA) content and electrolyte leakage in leaves significantly increased while peroxidase(POD) activities, soluble protein and photosynthetic pigment contents in leaves were all *** toxicity was promoted with increasing Pb treatment times. When Pb-stressed seedlings were exposed to SA(especially 10.0 mmol L-1 over 20 days), the physiological responses for Pb-only were reversed and the biomass of roots, stems, and leaves dramatically *** facilitated Pb uptake in fine roots and leaves but more Pb accumulated in fine roots. The results demonstrate that exogenous SA alleviates Pb-induced oxidative injuries and improves the tolerance of L. olgensis seedlings to Pb stress.

关键词： Soil Pb stress Succinic acid larix olgensis Physiological response Pb uptake

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Dendrochronology-based stand growth estimation of larix olgensis forest in relation with climate on the eastern slope of Changbai Mountain, NE China

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Frontiers of Earth Science 2013年第4期7卷 429-438页

作者： Bo LIN Qianqian XU Wenhui LIU Guochun ZHANG Qiongyao XU Qijing LIU Key Laboratory of Forest Cultivation Department of Forest Sciences Beijing Forestry University Beijing 100083 China

The eastern slope of Changbai Mountain is characterized by pure larch forest （larix olgensis） with little human disturbance. Response of tree growth to climate in this area remains unknown. Meanwhile, little is known about how climate variations affect the biomass increase which could be recognized as a three-dimensional tree growth index. The objective of this study is to investigate the climate effects on the radial and biomass growth of larch on eastem slope of Changbai Mountain. Tree-ring width chronologies and mean annual biomass increment were established using tree-ring data. We used correlation analysis and multiple regression analysis to explore the relationship between larch growth and climatic factors from 1957 to 2009. Results show that tree-ring growth and mean annual biomass increment were primarily and significantly affected by previous year climatic variables with slight difference among months. Temperatures were more consistently and strongly corre- lated to the chronologies and mean annual biomass increment than was precipitation. Temperature is the main factor limiting larch growth on Changbai Mountain and the ongoing climate warming may accelerate the growth of the species. The current stand biomass of the area was ***-1 and the annual stand biomass increment in 2009 was 2.91 ***-1. In conclusion, the old-growth forest in the study area is still accumulating carbon efficiently.

关键词： larix olgensis tree ring climatic factors,biomass China

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Mining Myb transcription factors related to wood development in larix olgensis

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Journal of Forestry Research 2020年第6期31卷 2453-2461页

作者： Jiali Zhao Huanhuan Xiong Junhui Wang Hanguo Zhang Lei Zhang State Key Laboratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbin 150040People’s Republic of China State Key Laboratory of Tree Genetics and Breeding Chinese Academy of ForestryBeijing 100081People’s Republic of China

larix olgensis *** is a fast-growing tree used for aff orestation in northeastern China and has great ecological and economic *** studying developmental genes in the xylem of this species,we investigated the Myb transcription factor family,one of the largest families of transcription factors in plants,which plays an important role in the regulation of lignifi cation in plant secondary *** sequencing a *** cDNA library using the Illumina HiSeq2500 high-throughput sequencing platform,we obtained 58,683 unigene sequences,of which 16,554 unigenes were longer than 1000 bp,accounting for 28.2%of the total *** alignment of these genes with the GO,COG,KEGG,Swiss-Prot and NR databases resulted in annotated 29,350 *** obtained a total of 1460 differentially expressed genes,of which 453 were upregulated and 1007 were downregulated at the two developmental stages *** gene annotations showed a wide range of biological functions and metabolic *** 10 Myb transcription factors that were obtained from the diff erentially expressed genes were analyzed by real-time quantitative PCR(qRT-PCR).The results showed that four Myb transcription factors may be associated with xylem development in *** to the large genome size of conifers,genomics research on these species has lagged behind that for other plant *** data provide the basis for further studies on xylem development in ***.

关键词： larix olgensis RNA-seq Myb transcription factors Diff erentially expressed genes

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Variation analyses of growth and wood properties of larix olgensis clones in China

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Journal of Forestry Research 2017年第4期28卷 687-697页

作者： Shaopeng Yin Zhenhai Xiao Guohui Zhao Xin Zhao Xiaoyang Sun Ying Zhang Fuwei Wang Shuchun Li Xiyang Zhao Guan-Zheng Qu State Key Laboratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbin 150040People’s Republic of China Tree Seedling Management Station Forestry Department of Jilin ProvinceChangchun 130000People’s Republic of China Seed Orchard of Siping Siping 136000People’s Republic of China

The growth traits (tree height, diameter at breast height, and stem straightness degree) and wood properties [wood density (WD), fiber length, fiber width, ash content (AC), lignin content, cellulose content, hemicellulose content (HEC), and holocellulose content] of 208 26-year-old larix olgensis clones were analyzed. Except for WD and AC, there were significant differences (p olgensis clones.

关键词： Genetic variation Growth traits larix olgensis Wood properties

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Screening and verification of the factors influencing somatic embryo maturation of larix olgensis

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Journal of Forestry Research 2018年第6期29卷 1581-1589页

作者： Yue Song Shujuan Li Xiaoming Bai Hanguo Zhang State Key Laboratory of Tree Genetics and Breeding Northeast Forestry University

With embryogenic callus of larix olgensisis, we investigated the effects of inositol, glutamine, casein hydrolysate, carbohydrate, abscisic acid and silver nitrate concentration on the maturation of the somatic *** dominant factors emerged, and we developed a response surface model based on the Box-Behnken *** defined the optimal conditions for the maturation of somatic embryos. The contents of abscisic acid, silver nitrate, sucrose and casein hydrolysis significantly affected the amount of maturing embryos, but inositol, maltose and glutamine had no effect. By establishing a response surface model with multiple factors, we predicted that the optimal number of L. olgensis somatic embryos was 204 ± 4 gon basal medium, containing 18.28 mg Labscisic acid,5.46 mg Lsilver nitrate and 82.67 g Lsucrose. In the verification experiments, the addition of 20 mg Labscisic acid, 5 mg Lsilver nitrate and 80 g Lsucrose to BM yielded an average of 202.06 somatic embryos per gram. These results should guide large-scale breeding of L. olgensis.

关键词： larix olgensis Embryogenic callus Somatic embryo maturation Box–Behnken design

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THE EFFECT OF LOW TEMPERATURE ADVERSITY ON MALE FLOWERS AND POLLEN IN larix olgensis

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Journal of Northeast Forestry University 1995年第4期6卷 8-13页

作者：魏占才刘桂丰赵丽惠李俊雁 Mudunjiang City Foreastry School

The electrie conductivity of pollen life-force and male flowers of larix olgensis on condition of low temperature adversity has been respectively measured by means of fluorescent dying method and conductivity method in 1992 and 1994. The results indicate that:(1 ) If the same clonal pollen is treated at equal time at different low temperatures, there are significant differences in pollen life-force, the pollen life-force is the largest between O℃aild -3℃, in higher or lower temperature range, the pollen life-force will decrease. The measurement of electric conductivity of male flowers provcs that the low temperature of below -3℃ is the inain reason that the cell membrane is damaged and the ***-force decreases. (2) The same clonal pollen life-force at the saine low temperature will gradually decrease with the increasing of frozen time. Its main reason is that suffocation and losing body fluid result in the damage of cell membrane, the measurement of electric conductivity of male flowers call prove that. (3) If pollen is treated with the same low temperature, the humidity will be the main factor of affecting pollen life-force. (4) There are significant differences in larix olgensis's resistance against low temperature in its different growth stage, the male flower's resistance of near pollen spreading period is low. (5) The resistance is different within clones. (6) The resistance against low temperature of larix call be incrcased by means of chemical treatment.

关键词： larix olgensis Male flower Pollen Resistance

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Nitrogen retranslocation, allocation, and utilization in bare root larix olgensis seedlings

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Journal of Forestry Research 2012年第1期23卷 87-94页

作者： WEI Hong.xu·XU Cheng-yang · MA Lii-yi · DUAN Jie Key Laboratory of Silviculture and Conservation Ministry of Educa-tion Beijing Forestry University Beijing 100083 China.

We quantified biomass accumulation and nitrogen （N） re- translocation, allocation, and utilization of Changbai larch （larix olgen- sis） seedlings subjected to four fertilization treatments （24, 59, 81, 117 ***-1 N） with an unfertilized control during summer and autumn 2009. Ammonium phosphate （18-46-0） was the fertilizer used in all treatments. On both sampling dates, the needles had greater biomass and N content than new （2009） stems and old （2008） stems, and coarse, medium and fine roots （diameters of 〉5, 2-5 mm, and 0-2 mm, respectively）. Higher N concentration was observed in old stems and coarse roots than that in new stems and medium roots. In mid-summer, fine roots had higher N concentration than coarse roots. The treatment with 24 ***1 N had the greatest biomass and N content in needles and old stems, and highest net N retranslocation （NRA） and amount of N derived from soil. On Sep- tember 21, no N translocation was observed, while the treatment with 24 ***^-1 N had the highest N utilization efficiency and fertilizer efficiency. Vector analysis revealed that all four fertilization treatments induced Nexcess relative to the control. The treatments with 59, 81, 117 ***^-1 N induce N excess compared with treatments at 24 ***-1 N. We conclude that the traditional local fertilizer application rates exceeded N require- ments and N uptake ability for Changbai larch seedlings. The application rate of 24 ***^-1 N is recommended.

关键词： larix olgensis Nitrogen retranslocation allocation bio-mass Vector analysis

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