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The unimodal latitudinal pattern of K,Ca and Mg concentration and its potential drivers in forest foliage in eastern China

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Forest Ecosystems 2024年第3期11卷 318-328页

作者： Zhijuan Shi Sining Liu Yahan Chen Dongdong Ding Wenxuan Han Key Laboratory of plant-Soil Interactions Ministry of EducationCollege of Resources and Environmental SciencesChina Agricultural UniversityBeijing100193China Forestry Ecological Engineering in the Upper Reaches of the Yangtze River Key Laboratory of Sichuan Province&National Forestry and Grassland Administration Key Laboratory of Forest Resources Conservation and Ecological Safety on the Upper Reaches of the Yangtze River College of ForestrySichuan Agricultural UniversityChengdu611130China Institute of Botany Chinese Academy of SciencesBeijing100093China

Potassium(K),calcium(Ca),and magnesium(Mg)are essential elements with important physiological functions in plants.Previous studies showed that leaf K,Ca,and Mg concentrations generally increase with increasing latitudes.However,recent meta-analyses suggested the possibility of a unimodal pattern in the concentrations of these elements along latitudinal gradients.The authenticity of this unimodal latitudinal pattern,however,requires validation through large-scale field experimental data,and exploration of the underlying mechanisms if the pattern is confirmed.Here,we collected leaves of common species of woody plants from 19 montane forests in the north-south transect of eastern China,including 322 species from 160 genera,67 families;and then determined leaf K,Ca,and Mg concentrations to explore their latitudinal patterns and driving mechanisms.Our results support unimodal latitudinal patterns for all three elements in woody plants across eastern China,with peak values at latitude 36.5±1.0°N.The shift of plant-functional-type compositions from evergreen broadleaves to deciduous broadleaves and to conifers along this latitudinal span was the key factor contributing to these patterns.Climatic factors,mainly temperature,and to a lesser extent solar radiation and precipitation,were the main environmental drivers.These factors,by altering the composition of plant communities and regulating plant physiological activities,influence the latitudinal patterns of plant nutrient concentrations.Our findings also suggest that high leaf K,Ca,and Mg concentrations may represent an adaptive strategy for plants to withstand water stress,which might be used to predict plant nutrient responses to climate changes at large scales,and broaden the understanding of biogeochemical cycling of K,Ca,and Mg.

关键词： Potassium Calcium Magnesium Mid-latitudes Latitudinal pattern plant functional type Water stress woody plant

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Unveiling the adaptation strategies of woody plants in remnant forest patches to spatiotemporal urban expansion through leaf trait networks

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Forest Ecosystems 2024年第2期11卷 247-254页

作者： Mengping Jian Jingyi Yang College of Forestry Guizhou UniversityGuiyang550025China

Background:With the expansion of urban areas,the remnants of forested areas play a crucial role in preserving biodiversity in urban environments.This study aimed to explore the impact of spatiotemporal urban expansion on the networks of leaf traits in woody plants within remnant forest patches,thereby enhancing our understanding of plant adaptive strategies and contributing to the conservation of urban biodiversity.Methods:Our study examined woody plants within 120 sample plots across 15 remnant forest patches in Guiyang,China.We constructed leaf trait networks (LTNs) based on 26 anatomical,structural,and compositional leaf traits and assessed the effects of the spatiotemporal dynamics of urban expansion on these LTNs.Results and conclusions:Our results indicate that shrubs within these patches have greater average path lengths and diameters than trees.With increasing urban expansion intensity,we observed a rise in the edge density of the LTN-shrubs.Additionally,modularity within the networks of shrubs decreased as road density and urban expansion intensity increased,and increases in the average path length and average clustering coefficient for shrubs were observed with a rise in the composite terrain complexity index.Notably,patches subjected to‘leapfrog’expansion exhibited greater average patch length and diameter than those experiencing edge growth.Stomatal traits were found to have high degree centrality within these networks,signifying their substantial contribution to multiple functions.In urban remnant forests,shrubs bolster their resilience to variable environmental pressures by augmenting the complexity of their leaf trait networks.

关键词： Urban remnant forest patch woody plant Leaf trait network plant adaptation strategy Spatiotemporal urban expansion

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Performance test of organic planting bags for woody plant seedlings

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International Journal of Agricultural and Biological Engineering 2020年第5期13卷 93-98页

作者： Musthofa Lutfi Wahyunanto Agung Nugroho Huy Thanh Vo Gunomo Djoyowasito Ary Mustofa Ahmad Sandra Sandra Department of Agricultural Engineering Faculty of Agricultural TechnologyBrawijaya UniversityMalang 65145Indonesia Division of Urban Infrastructural Engineering Mien Trung University of Civil EngineeringPhu Yen 56000Vietnam

Organic planting bag has been developed to overcome both weaknesses of plastic polybags,contaminating the soil and damaging the plant’s root when transplanting.The improvement in this stage was achieved by inserting coconut fiber to strengthen a bag.The main purpose of this study was to investigate the effectiveness of seedling and transplanting by using organic planting bags,employed,three woody plants,i.e.,Albizia(Albizia julibrissin),Cadam(Neolamarckia cadamba)and Gmelina(Gmelina arborea).Performance testing of organic plant bags was conducted on three compositions of coconut fiber and water hyacinth.Two stages of experiments were conducted to know bag performance.First,the testing of organic plant bags during the nursery was conducted for 50 d from day 0 to day 50.Second,the testing of organic plant bags after transplanting and observed on days 60,70,and 80,after transplanted on the field.The parameters in this study were plant height,a total of roots that penetrate the organic plant bags and a total of leaves and stem diameters of plant grown in the organic bag and transplanting on land.The results showed that organic planting bag with the composition 155 g of coconut fiber and 505 g of water hyacinth(A3B3)has 0.020 kg/cm^(2) compressive strength and provides the best plant growth rates.Compressive strength affects the number of roots which penetrate the organic bag.Generally,the growth of seed in organic bags is faster than that in polybags.Albizia shows a higher growth rate(0.379 cm/d)compared to Cadam and Gmelina.

关键词： seedling effectiveness organic planting bag nursery transplanting woody plant

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PHYSIOLOGY OF woody plant UNDER SALT CONDITION

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Journal of Northeast Forestry University 1996年第1期7卷 1-6页

作者：马焕成 Expernnental Center of Forestry Biology Beijing Forestry University Beijing China

Some advances in researches on the physiology of woody plants under salt condition are reviewed. The salt tolerant woody plants can be divided into two main groups. glycophytes and halophyes. They have different mechanisms for maintaining normal metabolism under salt condition. Halophytes usually are salt accumulators and glycophytes are salt excludors. However,the criteria for salt exclusion is not always coear. Although salt responses of different types of woody plants ard not the same some major changes are identilied identilied in net photosynthesis rate and in growth.Four mechamsms are proved to be related to the salt resitance of woody plants(1) Regulation of ion intake;(2) avoidance of toxicity; (3) maintaining meinbrane mtegrity and (4) ion compartmentation. Currently,conventional plant breeding and bioteclogy are both used to improve salt tolerance of woody plant.

关键词： woody plant salt resistance salt response

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Metabolic engineering in woody plants: challenges, advances, and opportunities

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aBIOTECH 2021年第3期2卷 299-313页

作者： Shu Yu Cody S.Bekkering Li Tian Department of plant Sciences Mail Stop 3University of CaliforniaDavisCA 95616USA

woody plant species represent an invaluable reserve of biochemical diversity to which metabolic engineering can be applied to satisfy the need for commodity and specialty chemicals,pharmaceuticals,and renewable energy.woody plants are particularly promising for this application due to their low input needs,high biomass,and immeasurable ecosystem services.However,existing challenges have hindered their widespread adoption in metabolic engi neering efforts,such as long generation times,large and highly heterozygous genomes,and difficulties in transfor mation and regeneration.Recent advances in omics approaches,systems biology modeling and plant transformation and regeneration methods provide effective approaches in overcoming these outstanding challenges.Promises brought by developments in this space are steadily opening the door to widespread metabolic engineering of woody pl ants to meet the global need for a wide range of sustainably sourced chemicals and materials.

关键词： woody plant Metabolic engineering Bioeconomy Sustainability

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Mechanical interaction between roots and soil mass in slope vegetation

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Science China(Technological Sciences) 2010年第4期53卷 3039-3044页

作者： YAN ZhiXin YAN ChangMing WANG HouYu Key Laboratory of Mechanics on Disaster and Environment in Western China(Lanzhou University) Ministry of EducationLanzhou 730000China School of Civil Engineering and Mechanics Lanzhou UniversityLanzhou 730000China College of Civil Engineering and Mechanics Central South University of Forestry and TechnologyChangsha 410004China Air Force Engineering Design&Research Bureau Beijing 100077China

The most basic function of slope vegetation is to strengthen rock and soil mass through plant roots which increase the shear strength of the slope markedly and thereby increase the stability of the slope. However, the calculation of the reinforcement ability of slope vegetation still remains at the stage of judging by experience, because it is rather difficult due to the intricacy and volatility of the force condition of plant roots in rock and soil medium. Although some scholars have tried to study the interaction between plant roots and soil mass, the systemic analysis of the mechanical reinforcement mechanism and the contribution of plant roots to strengthening the rock and soil mass on the surface of the slope is untapped. In this paper, by analyzing the mechanism of slope vegetation and the corresponding reinforcement effect, the effects that slope vegetation generates on the shear strength of slope soil mass are studied, thereby a theoretical basis for plant protection designing is provided.

关键词： slope vegetation mechanical model herbaceous plant woody plant

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Complexity responses of Rhododendron species to climate change in China reveal their urgent need for protection

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森林生态系统:英文版 2023年第4期10卷 425-435页

作者： Kun-Ji Li Xiao-Fei Liu Jin-Hong Zhang Xiong-Li Zhou Liu Yang Shi-Kang Shen Yunnan Key Laboratory of plant Reproductive Adaptation and Evolutionary Ecology Ministry of Education Key Laboratory for Transboundary Ecosecurity of Southwest ChinaInstitute of BiodiversitySchool of Ecology and Environmental ScienceYunnan UniversityKunming650504YunnanChina Institute of International River and Eco-security Yunnan UniversityKunming650504YunnanChina

Global climate change has been widely recognized as important factors that threaten biodiversity.Rhododendron species are not only famous woody ornamental plants worldwide but are also indispensable components in alpine and subalpine vegetation in southwest China.However,the geographical distribution ranges response of this broad taxonomic group to future climate change remains not be fully understood.Herein,we studied the impact of climate change on the distribution of Rhododendron species in China by predicting the changes in their suitable habitats,centroid,and species richness under three climate change scenarios(SSP1-2.6,SSP2-4.5 and SSP5-8.5)in the 2090s.The species richness changes of Rhododendrons along altitude were also evaluated.In addition,we calculated the phylogenetic signals of distribution response to climate change.We found that the distribution responses of Rhododendron to climate change have weak phylogenetic signals.In the 2090s,the suitable habitats of about 87%of Rhododendron species will be reduced,77%of Rhododendron species are manifested as northward migration.The high species richness of Rhododendrons tends to migrate to transboundary areas with high altitudes in China.Some Rhododendron species with no concern previously should be taken seriously for their high risk of habitat loss under climate change.Thus,the urgent protection of Rhododendron species under climate change need to be paid more attention than previous acknowledged.We recommend carrying out the reintroduction of endangered species in future suitable habitat,strengthening the protection of transboundary areas with high species richness,and focusing on species with few concerns previously.

关键词： Rescue woody plant Alpine ecosystem Mountaintop Diversity

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C_4 plant species and geographical distribution in relation to climate in the desert vegetation of China

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Research in Cold and Arid Regions 2011年第5期3卷 381-391页

作者： PeiXi Su TingTing Xie ZiJuan Zhou Linze Inland River Basin Research Station Laboratory of Plant Stress Ecophysiology and Biotechnology Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China

Water use efficiency of Ca plants is higher than that of C3 plants, and CAM （Crassulaceae Acid Metabolism） plants have the highest water use efficiency. In the desert regions of China, CAM plants are scarce, and C4 plants, especiaUy C4 woody plants, have an important position and role in the desert ecosystem. There are 45 species of Ca woody plants in the desert regions of China, including semi-woody plants, accounting for 6% of the total desert plant species in China, and most of them are concentrated in the families of Chenopodiaceae and Polygonaceae, which are 19 species and 26 species, respectively. The number of C4 herbaceous plants is 107 species, including 48 monocot species and 59 dicot species. C4 woody plants mainly inhabit the northwestem arid desert regions of China west of the Helan Mountains. The drought-resistance and drought-tolerance of Ca herbaceous plants are worse than C4 woody plants, and C4 herbaceous plants mainly inhabit areas with shallow groundwater depth and better water conditions in the desert regions, and are widely distributed along the margins of oases. The abundance of C4 woody plants is closely correlated with drought, but the abundance of C4 herbaceous plants increases with wet conditions.

关键词： desert plant Ca photosynthesis woody plant geographical distribution

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Phylogeny drives highly interconnected and nested mutualistic networks of woody plants and arbuscular mycorrhizal fungi in a Chinese subtropical forest

Phylogeny drives highly interconnected and nested mutualisti...

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中国菌物学会2015年学术年会

作者： Liang Chen Yong Zheng Cheng Gao Xiang-Cheng Mi Ke-Ping Ma Tesfaye Wubet Liang-Dong Guo State Key Laboratory of Mycology Institute of MicrobiologyChinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of Sciences Department of Soil Ecology UFZ-Helmholtz Centre for Environmental Research The German Centre for Integrative Biodiversity Research(iDiv) University Leipzig

Unveiling the structure of mutualistic interaction networks has important implications for maintaining biodiversity and understanding ecosystem functioning, but the symbiotic interaction network structure of woody plants and arbuscular mycorrhizal fungi（AMF） in forest ecosystems remains poorly understood. We examined AMF communities from 166 root samples of 17 woody plant species from ten quadrats in a Chinese subtropical forest using 454 pyrosequencing of the 18 SrDNA. We tested the structure of the woody plant-AMF interaction network and the effects of phylogenetic constraints and environmental filtering on the network structure. Our results indicate that the woody plant-AMF network was highly connected and nested, but low modular or specialized. The nonrandom patterns in the woody plant-AMF network were affected by phylogenetic constraints of plants and AMF, but not by environmental variables. This study suggests the evolutionary processes among woody plants and AMF to be more important than environmental filtering in shaping mycorrhizal community assemblages in subtropical forest ecosystems.

关键词： 454 pyrosequencing 18S r DNA arbuscular mycorrhizal fungi mutualistic network pattern phylogenetic constraint subtropical forest woody plant

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