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Search Results: 1 - 10 of 35007 matches for " Yuan-Gang Zu "
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Dynamic Analysis and Diversity of Plant Life Cycle Forms

ZU Yuan-Gang,

生态学报 , 2002,
Abstract: This paper mainly discussed the basic definition and types of plant life cycle form. According to the plant ecological amplitude, fitness and energy allocation patterns, plant life cycle form could be classified as three basic forms (V form: vegetative growth form; S form: sexual reproduction form and C form: clone reproduction form) and six transitional forms (VS form, SV form, CS form and SC form, VC and CV form) which combine features of three basic forms. By trading off the energy allocation among different plant cycle phases, plants optimize their energy utilization and adopt a specific plant life cycle form with the characteristics of best reproductive and survival benefits as well as maximum fitness to habitats. Moreover, our results indicate that primary metabolism and secondary metabolism might be closely correlated with plant life cycle forms and their transformation between forms. Generally speaking, primary metabolite is mainly used in vegetative growth, but secondary metabolite may be mainly used to promote propagation and over come environmental stress. The plant life cycle form of one specific species could transform from one form to another to adapt to the changing environment. This transformation process is characterized as a dynamic process and form the spectrum of plant life cycle forms of this species. The developing mechanism of plant life cycle form is also discussed in this paper. The size of an environmental sieve (resource status and disturbance degree of habitat) results in the selective pressure. According to the pressure intensity, plants optimize their energy allocation with regard to the need of their different organs by way of producing primary and secondary metabolites, These result in the adaptive strategy and ecological amplitude of one specific species. Finally, fitness manifested by the interaction between the habitat and the adaptive strategy can be characterized as plant life cycle form. Furthermore, this paper also discusses the transformation mechanism between the plant life cycle forms. Because each species has its specific habitat type, selective pressure, metabolite and adaptive strategy, habitat also has a transformational change with the continuous change in spatial and temporal scales. These result in the formation of transformation types of habitat. These kinds of habitat enhances the transformational changes in selective pressure, metabolite and adaptive strategy, which form their transformation types, respectively. As a result, the inter\|transformation processes of plant life cycle forms (so\|called transformation types) were observed. The spectrums of plant life cycle forms of five species including Rhodiola sachalinensis were exemplified to analyze the dynamic features of these spectrums and their possible correlation to the community characteristics. Our results indicated that: First,plants mainly with a V life cycle form generally have a stable population because of their relative big vegetati
Classification and reciprocal transformation of plant life cycle forms

ZU Yuan-Gang,

生态学报 , 2005,
Abstract: The plant life cycle should include 3 cardinal processes of vegetative growth, sexual reproduction and clonal reproduction, expressing various adaptability features and life cycle characteristics in long-term evolution process. The life history strategies of the plant were the representations of long-term adaptation to relative stable surroundings. The superior life history strategy might be formed under the specific habitats. When the plant habitats expressed any variety (the abrupt change usually expresse...
The blooming and production of reproductive modules in relation to tree age and their position within crowns in Betula platyphylla

ZU Yuan-Gang,

生态学报 , 2000,
Abstract: The time of first blooming and fruiting of birch varied greatly in different habitats and origins.On the same habitat,seed\|origin plant bloomed over 6 years later than that from sprouts.The first flowers in mesic site appeaired earlier than those in wet site.Blossom date within a year also varied among different stands.Catkin module number,reproductive branch number,and the number of catkins per reproductive branch were directly related to the age of tree.The number of catkin modules in middle\|aged trees>...

ZU Yuan-Gang,and CUI Ji-Zhe,

植物生态学报 , 2002,
Abstract: Leymus chinensis is a clonal plant species that reproduces both asexually by below-ground rhizomes and sexually by seed. Its clonal diversity was studied in 11 populations of 2 leaf-colored types (gray green and yellow green) in Songnen Plain of China using horizontal starch gel electrophoresis. The clonal diversity was high in the species. The mean of Simpson's index was 0.983, and 97.7% of genotypes were local genotypes. Seedling recruitment and selection caused by environmental heterogeneity may be the important factors in maintaining the polymorphism. On the clonal characters, the 2 types of gray green and yellow green were obvious different. The clonal diversity was lower in yellow green type than that in gray green type. The genetic diversity calculated on the data from genets was consistent with that from the ramets. The result confirmed that there was obvious genetic differentiation between the 2 types of Leymus chinensis-the gray green and the yellow green type.
Extraction and Anti-inflammatory of Korean Pine Polyphenol

祖元刚, 胡艳, 姜守刚
ZU Yuan-Gang
, HU Yan, JIANG Shou-Gang

植物研究 , 2016, DOI: 10.7525/j.issn.1673-5102.2016.04.021
Abstract: 选取超声波提取法对红松树皮中多酚类物质的提取工艺进行研究,以多酚提取率作为指标,采用单因素试验及正交试验,研究了物料比、乙醇浓度、提取时间、提取温度对红松多酚提取的影响。结果表明,超声波提取的最佳工艺条件是物料比(g·mL-1)1:30,乙醇浓度60%,提取时间2.0 h,提取温度80℃。本文也对红松多酚的抗炎作用进行了研究,并与杨树多酚、蓝莓多酚进行了比较,结果表明,在0.01~100 μg·mL-1范围内,3种多酚都有一定的抗炎作用,且抗炎作用大小顺序为:蓝莓多酚> 红松多酚> 杨树多酚。
Enrichment and Purification of Deoxyschizandrin and γ-Schizandrin from the Extract of Schisandra chinensis Fruit by Macroporous Resins
Feng-Jian Yang,Chun-Hui Ma,Lei Yang,Chun-Jian Zhao,Ying Zhang,Yuan-Gang Zu
Molecules , 2012, DOI: 10.3390/molecules17033510
Abstract: In present study, the performance and separation characteristics of 21 macroporous resins for the enrichment and purification of deoxyschizandrin and γ-schizandrin, the two major lignans from Schisandra chinensis extracts, were evaluated. According to our results, HPD5000, which adsorbs by the molecular tiers model, was the best macroporous resin, offering higher adsorption and desorption capacities and higher adsorption speed for deoxyschizandrin and γ-schizandrin than other resins. Columns packed with HPD5000 resin were used to perform dynamic adsorption and desorption tests to optimize the technical parameters of the separation process. The results showed that the best adsorption time is 4 h, the rate of adsorption is 0.85 mL/min (4 BV/h) and the rate of desorption is 0.43 mL/min (2 BV/h). After elution with 90% ethanol, the purity of deoxy-schizandrin increased 12.62-fold from 0.37% to 4.67%, the purity of γ-schizandrin increased 15.8-fold from 0.65% to 10.27%, and the recovery rate was more than 80%.
Synthesis of the Key Intermediate of Coenzyme Q10
Fan-Song Mu,Meng Luo,Yu-Jie Fu,Xuan Zhang,Ping Yu,Yuan-Gang Zu
Molecules , 2011, DOI: 10.3390/molecules16054097
Abstract: (2’E)-1-(3-methyl-4-p-toluenesulfonyl-2-butene)-6-methyl-2,3,4,5-tetramethoxybenzene (4) is the key intermediate in the synthesis of coenzyme Q10 via a coupling reaction with solanesyl bromide. In this paper, we report a simple and effective synthesis of compound 4, starting with the readily available and inexpensive precursors p-toluenesulfonyl chloride (TsCl) and isoprene to obtain (2E)-1-p-toluenesulfonyl-2-methyl-4-hydroxy-2-butene (3) by addition, esterification and hydrolysis. Application of the Friedel-Crafts alkylation to compound 3, followed by the addition of 2,3,4,5-tetramethoxytoluene (TeMT), assembled the two parts into compound 4. The key parameters of each reaction were optimized at the same time, and the four total operations needed to produced compound 4 had a 27.9% overall yield under the optimized conditions. The structures of the compounds were characterized by 1H-NMR, IR and MS. This alternative process has the potential to be used for large-scale process.
Effects of girdling on carbohydrates in the xylem wood and phloem bark of Korean pine (Pinus koraiensis)
环剥对红松(Pinus koraiensis)韧皮部和木质部碳水化合物的影响

WANG Wen-Jie,HU Ying,WANG Hui-Mei,ZU Yuan-Gang,LI Xue-Ying,

生态学报 , 2007,
Abstract: Stem girdling treatment inhibits the axial transport of carbohydrates through the phloem and affects resource allocation to different organs of trees.Previous studies indicated that starch and soluble sugar may accumulate in the upper part but diminish in the lower part of the girdled stem in the long run.However,few studies so far have examined the short-term dynamics of starch and soluble sugar after the girdling and this information is important for understanding the functioning of carbohydrates for plant growth.For example,how much time does it take for girdling treatment to induce the accumulation or reduction of different carbohydrates and does girdling treatment affect the phloem-xylem transport of sugars? How are the dynamics of carbohydrate reserves related to the respiratory consumption in stem? To answer these questions,we carried out a stem girdling study on trees of Korean pine(Pinus koraiensis Sieb.et Zucc.)(38-year-old).We measured respiratory consumption of sugars with a Li-6400 system at an interval of 1-2 days.We collected samples of xylem woods and phloem barks at the same interval for carbohydrate analysis with the colorimetric method(Anthrone-perchloric acid method).We found:(1)During the 4 weeks of measurement,soluble sugar and starch in xylem and starch in phloem in the upper part of the girdled stems did not differ from those in the lower part(p>0.05).(2)Differences in soluble sugar in phloem between the upper and lower parts were first observed in the second week and substantially higher values in the upper part were observed during the 4th week(p<0.05).(3)Girdling treatment obstructed the axial transport of soluble sugar via phloem but did not affect the transport in xylem.Moreover,girdling treatment did not affect the correlation of soluble sugar between phloem and xylem.(4)Girdling treatment strongly affected the respiratory consumption of carbohydrates in stems.During the first week,the sugar consumption rate in the upper part did not differ from that in the lower part(p>0.05).However,the consumption rate in the upper part of the girdled stem sharply increased in the second week and became significantly higher than that in the lower part(p<0.05).From the third week,the consumption rate in the lower part significantly decreased(p<0.05).We conclude that the most recently formed carbohydrates from canopy leaves were consumed by the enhanced respiration sincewe observed only slight increase in soluble sugar and no change in starch in the upper part of the girdled stems.Moreover,the stored carbohyrates could supply substrates about 2 weeks for the high respiration in the lower part of the girlded stems.

Zu Yuan-gang,Chang jie Northeast Forestry University Northeast Normal University,

植物生态学报 , 1987,
Abstract: 野外条件下同时测定植物群体光合作用、呼吸作用和蒸腾作用的综合性测试装置,是为适应当前草原生态系统第一性生产力研究的需要并根据植物的光合作用、呼吸作用和蒸腾作用过程中的气体交换原理,参考国内外有关学者的类似工作而设计、组装的。该测试装置主要由人工气候箱、环境控制系统、气道系统、测试系统和电源装置五部分组成,并兼有测定环境因子的配套仪器。通过1983—1985年我们在东北天然羊草草原上实际应用的结果证明,该装置的各项测定指标均达到了预定的设计要求。本文就该测试装置的设计原理、基本结构、测试程序和计算方法等方面的问题进行了初步探讨,以便为该测试装置的不断改进和完善提供参考依据。
Effects of different water conditions on life cycle forms and physiological metabolisms of Catharanthus roseus
土壤不同水分条件对长春花(Catharanthus roseus)生活史型的影响

TANG Zhong-Hu,YANG Lei,LIANG Sheng-Nan,ZU Yuan-Gang,

生态学报 , 2007,
Abstract: In order to investigate the impacts of different water contents in soil on life cycle forms and physiological metabolisms of Catharanthus roseus (L.) G. Don, four levels of water supply, including control (CK), light drought (LD), moderate drought (MD) and heavy drought (HD), were set up in the present paper. The cluster analysis was conducted to C. roseus seedlings upon water treatment according to their morphological characteristics. The results showed that 20 seedlings involved were dissected into two groups and the treatments of MD and HD led to significant morphological changes from that of CK and LD. Analysis of principal component analysis (PCA) on 15 kinds of phenotypic characteristics, separately being related to vegetative growth (V), sexual (S) and clone (C) reproduction, was conducted. The results showed that the life cycle forms under the conditions of CK, LD, MD and HD were V0.39S0.54C0.07, V0.36S0.50C0.14, V0.53S0.27C0.20 and V0.45S0.09C0.46. It suggested that MD and HD resulted in enhanced percentage of clone reproduction and decreased sexual reproduction. Alkaloid contents in C. roseus, including vindoline, catharanthine and anhydrovinblastine, were measured during stress. By the time of 16 d after treatment with HD, the contents of vindoline, catharanthine and anhydrovinblastine were significantly higher, being 1.5, 2.3 and 3.1 folds of the control, respectively. High level of anhydrovinblastine was proved to be induced by soil drought conditions, which offered theory for exploitation and utilization of drug plants.
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