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Effects of 60-day NO_2 fumigation on growth,oxidative stress and antioxidative response in cinnamomum camphora seedlings

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第3期11卷 190-199页

作者： Zhuo-mei CHEN Ying-xu CHEN Guo-jian DU Xi-lin WU Feng LI College of Environmental and Resource Sciences Zhejiang University Hangzhou 310029 China Zhejiang Forestry Academy Hangzhou 310023 China Department of Geography Minjiang University Fuzhou 350108 China

Objective： To study the oxidative stress and antioxidative response of cinnamomum camphora seedlings exposed to nitrogen dioxide （NO2） fumigation. Methods： Measurements were made up of the growth, chlorophyll content, chlorophyll fluorescence, antioxidant system and lipid peroxidation of one-year-old C. camphora seedlings exposed to NO2 （0.1, 0.5, and 4 μl/L） fumigation in open top chambers over a period of 60 d. Results： After the first 30 d, 0.5 and 4.0 μl/L NO2 showed insignificant effects on the growth of C. camphora seedlings. However, exposure to 0.5 and 4.0 pilL NO2 for 15 d significantly reduced their chlorophyll content （P〈0.05）, enhanced their malondialdehyde （MDA） content and superoxide dismutase （SOD） activity （P〈0.05）, and also significantly reduced the maximal quantum yield of PSII in the dark [the ratio of variable fluorescence to maximal fluorescence （Fv/Fm）] （P〈0.05）. In the latter 30 d, 0.5μl/L NO2 showed a positive effect on the vitality of the seedlings, which was reflected by a recovery in the ratio of Fv/Fm and chlorophyll content, and obviously enhanced growth, SOD activity, ascorbate （AsA） content and glutathione reductase （GR） activity （P〈0.05）; 4.0 pilL NO2 then showed a negative effect, indicated by significant reductions in chlorophyll content and the ratio of Fv/Fm, and inhibited growth （P〈0.05）. Conclusion： The results suggest adaptation of C. camphora seedlings to 60-d exposure to 0.1 and 0.5 μl/L NO2, but not to 60-d exposure to 4.0 pilL NO2 C. camphora seedlings may protect themselves from injury by strengthening their antioxidant system in response to NO2-induced oxidative stress.

关键词： cinnamomum camphora Fumigation Growth Chlorophyll content Chlorophyll fluorescence Antioxidant Lipid peroxidation

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A new 3-(3,4-methylenedioxyphenyl)-propane-1,2-diol glycoside from the roots of cinnamomum camphora

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Chinese Chemical Letters 2011年第8期22卷 954-956页

作者： Rui Jiang Zhong Lin You Wu Wei Xiong Er Lei Xie Guo Ping Zhou Dong Ming Zhang Jiangxi Provical Institute for Drug and Food Control Nanchang 330029 China Institute of Materia Medica Chinese Academy of Medical Sciences and Peking Union Medical College (Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine Ministry of Education) Beijing 100050 China

A new 3-（3,4-methylenedioxyphenyl）-propane-1,2-diol glycoside,named cinnamomdiol A（1）,together with two known compounds,3-（3,4-methylenedioxyphenyl）-propane-1,2-diol（2） and taxifolin（3）,was isolated from the roots of cinnamomum *** structures were determined on the basis of spectroscopic *** 2 and 3 were isolated from the title plant for the first time.

关键词： cinnamomum camphora 3-(3 4-Methylenedioxyphenyl)-propane-1 2-diol glycoside Cinnamomdiol A

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Characteristics of water relations in seedling of Machilus yunnanensis and cinnamomum camphora under soil drought condition

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Journal of Forestry Research 2006年第4期17卷 281-284页

作者： TANG Tian-tian ZHAO Lin-sen Faculty of Landscape Architecture Southwest Forestry College Kunming 650224 P. R. China

The soil drought stress experiment in different durations (no watering within 3d, 6d, 9d, 11d individually) was conducted to study the drought-resistant capacity of one-year-old seedlings for the native tree species (Machilus yunnanensis) in Yunnan Province and the introduced tree species (cinnamomum camphora). The leaf water potential, chlorophyll content, proline content and plasma membrane permeability for two species seedlings were measured in different soil drought conditions. The results showed that, on the 9th day of drought stress, the leaf water potential of two species decreased obviously, whereas the free proline content and plasma membrane permeability increased sharply. On the 11th day, the leaf water potential of C. camphora seedlings was lower than that of M. yunnanensis seedlings; the plasma membrane permeability in C. camphora seedling leaves increased much more than that in M. yunnanensis seedling leaves, which showed that the injury to the former by soil drought stress was more severe than that to the latter. The free proline content in M. yunnanensis seedling leaves continued to increase on the 11th day, but that in the C. camphora seedling leaves started to drop obviously, indicating that the reduction of osmotic regulation substance in C. camphora seedling leaves after the 11th day was unable to maintain the osmotic balance between the plasma system and its surroundings and the water loss occurred inevitably. Comprehensively, M. yunnanensis seedlings enhanced the drought-resistance in the course of soil drought stress by maintaining higher leaf water potential and by increasing osmotic regulation substance to promote cell plasma concentration and maintain membrane structure integrity so as to reduce water loss. The subordination function index evaluated with fuzzy mathematic theory also showed that the drought-resistant capacity of M. yunnanensis seedlings was stronger than that of C. camphora seedlings.

关键词： Soil drought Water potential Plasma membrane permeability Machilus yunnanensis cinnamomum camphora

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Impact of elevated CO_2 concentration under three soil water levels on growth of cinnamomum camphora

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2006年第4期7卷 283-290页

作者： ZHAO Xing-zheng WANG Gen-xuan SHEN Zhu-xia ZHANG Hao QIU Mu-qing Agro-Ecology Institute School of Life Sciences Zhejiang University Hangzhou 310029 China

Forest plays very important roles in global system with about 35% land area producing about 70% of total land net production. It is important to consider both elevated CO2 concentrations and different soil moisture when the possible effects of elevated CO2 concentration on trees are assessed. In this study, we grew cinnamomum camphora seedlings under two CO2 concentrations （350 μmol/mol and 500μmnol/mol） and three soil moisture levels [80%, 60% and 40% FWC （field water capacity）] to focus on the effects of exposure of trees to elevated CO2 on underground and aboveground plant growth, and its dependence on soil moisture. The results indicated that high CO2 concentration has no significant effects on shoot height but significantly impacts shoot weight and ratio of shoot weight to height under three soil moisture levels. The response of root growth to CO2 enrichment is just reversed, there are obvious effects on root length growth, but no effects on root weight growth and ratio of root weight to length. The CO2 enrichment decreased 20.42%, 32.78%, 20.59% of weight ratio of root to shoot under 40%, 60% and 80% FWC soil water conditions, respectively. And elevated CO2 concentration significantly increased the water content in aboveground and underground parts. Then we concluded that high CO2 concentration favours more tree aboveground biomass growth than underground biomass growth under favorable soil water conditions. And CO2 enrichment enhanced lateral growth of shoot and vertical growth of root. The responses of plants to elevated CO2 depend on soil water availability, and plants may benefit more from CO2 enrichment with sufficient water supply.

关键词： cinnamomum camphora CO2 concentration Soil moisture Plant growth Root to shoot ratio

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Yellowing of disease? Or differentiating for adaptation? Study on cinnamomum camphora ecotypes

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Forestry Studies in China 2010年第2期12卷 67-73页

作者： LI Qing ZOU Chun-jing XU Ying Shimizu HIDEYUKI Shanghai Key Laboratory of Urbanization ＆ Ecological Restoration School of Life Science East China Normal University Shanghai 200062 P. R. China National Institute for Environmental Studies 16-20nogawa Tsukuba Ibaraki 305-8506 Japan

cinnamomum camphora （L.） Presl is an evergreen broad-leaved tree of the Lauraceae family, widely distributed in the sub-tropical areas in the south of China and used as a virescent tree in urban gardens and streets in Shanghai for its beautiful shape and intensive stress-resistance. However, yellowing of C camphora in recent years casts doubt about its significance. We believe the green-leaved and yellow-leaved C camphora might be two different ecotypes, and tentatively refer to the green-leaved C camphora as C camphora f. viridis f. nov （CCV） and the yellow-leaved as C camphora *** f. nov （CCF）. We studied their differences and arrived at the following conclusions： 1） compared with CCF, the area of lamina of CCV is significantly larger and the amount of chlorophyll （Chl） significantly higher; 2） the lamina and palisade tissues of CCV are significantly thicker than those of CCF, but its cuticle is significantly thinner; 3） the shape of the stomata of CCV is different from that of the CCF; the stomatal density and stomatal index of CCV are significantly lower than those of CCF. These results show that C camphora might evolve adaptive dif- ferentiation in some aspects which can be used in virescence in urban streets and gardens.

关键词： cinnamomum camphora ecotype differentiation chlorophyll stomatal parameters

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Antioxidative Activity and Protein Expression Effects of the Extracts from cinnamomum camphora on the Hairgrowth Relevant Factors

Antioxidative Activity and Protein Expression Effects of the...

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作者： Sole Cho Ok-Hwan Kim Department of Digital Management Information Graduate School of Nambu University

Purpose:This study has been conducted with the aim of providing practical materials for development of an anti-hair loss agent and hair growth promotor that utilizes natural ingredients replacing medications through experimental methods testing growth factor protein expression promotion effect from the cinnamomum ***:We extracted the active ingredients using distilled water,ethanol,methanol,ethanol-ultrasonic,methanol-ultrasonic,and supercritical extraction *** then evaluated the antioxidant activity and selected the most efficient *** study aimed to evaluate the cytotoxicity of *** extract to human hair follicle dermal papilla cells(HFDPC) using the MTT assay and the promoting effect of *** extract on protein expression of hair-growth relevant factors using western ***:Among the six *** extracts,the highest extraction yield was recovered in the methanolultrasonic extract(2.0378%),the total polyphenol was highly recovered in the ethanol-ultrasonic extract(50.248 mg/g),and the total flavonoid content was maximized in the methanol-ultrasonic extract(5.907 mg/g).The electron-donating ability was elevated in the methanol-ultrasonic extract(96.34%),and the high nitrite-scavenging activity was shown in the supercritical extract(37.59%).No cytotoxicity was observed in HFDPC treated with methanol-ultrasonic extract from *** up to 500 μg/*** treatment of methanol-ultrasonic extract from ***(100 μg/mL) into HFDPC significantly promoted the protein expression of PDGF- β(42%) and IGF(64%) compared to the control,while the protein expression of VEGF,KGF,hGH,and EGF were not significantly ***:Therefore,it is estimated that the methanol-ultrasonic extract from *** could be used as a functional antioxidant and as a hair-growth promoting material.

关键词： Antioxidant ability cinnamomum camphora Hair-growth Human hair follicle dermal papilla cells Growth factor

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Biological traits and life history of Pagiophloeus tsushimanus(Coleoptera:Curculionidae),a weevil pest on camphor trees in China

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Journal of Forestry Research 2021年第5期32卷 1979-1988页

作者： Cong Chen Congcong Zhang Shouyin Li Han Zhu Binqi Fan Yan Wang Peng Su Yangyang Han Dejun Hao Co-Innovation Center for Sustainable Forestry in Southern China Nanjing Forestry UniversityNanjing 210037People’s Republic of China College of Forestry Nanjing Forestry UniversityNanjing 210037People’s Republic of China Forest Station of Shanghai Shanghai 200040People’s Republic of China

cinnamomum camphora(L.)***.(Laurales:Lauraceae)is widely cultivated as an important landscape tree species in many urban areas in South China,especially in Shanghai *** tsushimanus Morimoto has become a destructive insect pest of *** plantations in Shanghai,but the biological and ecological traits of this pest remain largely *** this study,we investigated the damage and life history and determined the larval instar of *** results indicated that *** is a monophagous weevil pest,and *** is the unique host tree *** plantations in all administrative districts of Shanghai have been seriously damaged by *** often aggregate for feeding on the tender bark of twigs and occasionally on newly emerged *** experiencing damage,the twigs shrink and crack and the buds will *** tend to repeatedly mate and oviposit,and all females lay single eggs at a *** will be covered with a mixture of secretions and wood chips by female ***(1 st-2 nd instar)feed on the phloem,while 3 rd-5 th instar can bore into the phloem and the *** tunnels,including three shapes(inverted"L",inverted"T",and inverted"Z"),were observed in the trunk of each tree,and resulted in swelling of the outer *** has one life cycle per year in *** adults and larvae(3 rd-5 th instar)overwinter from early November to early *** overwinter in grooves on the underside of branches or at branch nodes,and larvae overwinter in *** larval instars of *** were determined according to Dyar’s and Crosby’s *** biological traits and life history of *** have been identified and can provide guidance in terms of pest control and plantation management.

关键词： cinnamomum camphora Damage traits Life cycle Dyar’s rule Head capsule width

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Bird-plant interactions and vulnerability to biological invasions

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Journal of Plant Ecology 2016年第6期9卷 692-702页

作者： Adam D.Chupp Loretta L.Battaglia Department of Plant Biology Southern Illinois UniversityLife Sciences IIMail Code 6509CarbondaleIL 62901-6509USA

Aims Species interactions regulate the invasiveness of non-native species and as declines of native tree species escalate,exotic tree species that offer supplementary resources to animal seed-dispersers should expand their distributions as they fill ecological *** primary objective was to forecast impacts from an imminent biological invasion(laurel wilt disease)by quantifying resources provided by native(threatened)and exotic fruits(disease-resistant)and associated bird foraging *** In the southeastern USA,we tested for redundancy among the resources provided by native and exotic fruits to overwintering *** between abundant subcanopy species Persea borbonia(native)and cinnamomum camphora(exotic)were paramount considering the widespread disease-induced decline of ***,and the biological and phylogenetic similarities between these *** two winter survey periods,we quantified fruit removal and documented bird species using motion-activated cameras in the *** and chemical fruit characteristics were also *** Findings Foraging bouts on both *** and *** fruits were documented for four native bird *** was no difference in selectivity between fruit types during Year 1 of our survey,but there was a significant preference for *** fruit in Year 2;the change in preference was correlated with significantly lower temperatures in Year *** the pulp/seed ratio and moisture content differed,the nutritional content of fruit pulp(g/100 g)was similar between fruit *** the apparent redundancy among these native and exotic fruit resources,we forecast increases in the consumption and dispersal of exotic propagules following the widespread laurel wilt disease-induced decline of *** and other native fruit bearing members of *** empirically based prediction is among the first to document exotic forest pathogens as indirect threats to native bird-plant int

关键词： bird frugivory forest pests and pathogens cinnamomum camphora laurel wilt disease Persea borbonia

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Mycorrhizal Networks Interacting with Litter Improves Nutrients and Growth for One Plant through the Vary of N/P Ratio under Karst Soil

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Phyton-International Journal of Experimental Botany 2021年第3期90卷 701-717页

作者： Liling Kang Yuejun He Lipeng Zang Jianpeng Si Ying Yang Kaiping Shen Tingting Xia Qiyu Tan Bangli Wu Yun Guo Wei Wang Qin Liang Forestry College Forest Ecology Research CenterGuizhou UniversityGuiyang550025China College of Landscape Architecture and Life Science Chongqing University of Arts and SciencesChongqing402160China School of Pharmacy Guizhou University of Traditional Chinese MedicineGuiyang550025China

Arbuscular mycorrhizae(AM)fungi affect nutrient uptake for host plants,while it is unclear how AM fungi interacting with soil litter affect plant growth and nutrient utilization through mycorrhizal networks in karst soil of deficient nutrients beyond the *** experiment was conducted in a microcosm composed of a planting compartment for cinnamomum camphora seedlings with or without Glomus mosseae fungus(M+vs.M−)and an adjacent litter compartment containing or not containing additional litter material of Arthraxon hispidus(L+vs.L−),where the compartments are connected either by nylon mesh of 20μm or 0.45μm which either allow available mycorrhizal networks within the litter compartment or prevent mycelium entering into the litter compartment(N+vs.N−).Plant biomass and nutrients were *** results showed that the addition of litter changed the symbiotic process in mycorrhizal colonization,spore,and hyphal density,which when in association with the host plant then affected the biomass,and accumulations of N(nitrogen)and P(phosphorus)in the individual plant as well as root,stem,and leaf *** fungi increased N and P accumulations and N/P ratio in individual plants and plant tissues.A decrease of the N/P ratio of the individual plant was observed when AM fungus interacted significantly with litter through mycorrhizal networks in the litter *** results indicate that the *** seedlings benefited from litter in nutrient utilization of N and P through the vary of N/P ratio when accessing mycorrhizal *** findings suggest that mycorrhizal networks interacting with litter improve growth and nutrients of N and P for plants through the vary of N/P ratio in order to alleviate nutrient limitation under karst soil.

关键词： Arbuscular mycorrhizae cinnamomum camphora litter mycelium nutrient utilization

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油用香樟培育及高产栽培技术

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林业科技通讯 2020年第10期 97-100页

作者：陈宗福苏勇贤苏远玉余玉珠广西壮族自治区国有钦廉林场广西钦州535000

从苗木培育、栽培管理、病虫防治到枝叶采收等技术措施,介绍了油用香樟(cinnamomum camphora)的高产栽培技术。

关键词：油用香樟 cinnamomum camphora 苗木培育栽培管理病虫防治枝叶采收

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