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Growth,Nitrogen Uptake and Flow in Maize Plants Affected by Root Growth Restriction

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Journal of Integrative Plant Biology 2009年第7期51卷 689-697页

作者： Liangzheng Xu Junfang Niu Chunjian Li fusuo zhang The Key Laboratory of Plant Nutrition Ministry of Agriculture Department of Plant Nutrition China Agricultural University Beijing 100193 China School of Life Sciences Jiaying University Meizhou 514015 China Centre of Agricultural Resources Institute of Genetics and Developmental Biology the Chinese Academy of Sciences Shijiazhuang 050021 China

The objective of the present study was to investigate the influence of a reduced maize root-system size on root growth and nitrogen （N） uptake and flow within plants. Restriction of shoot-borne root growth caused a strong decrease in the absorption of root ： shoot dry weight ratio and a reduction in shoot growth. On the other hand, compensatory growth and an increased N uptake rate in the remaining roots were observed. Despite the limited long-distance transport pathway in the mesocotyl with restriction of shoot-borne root growth, N cycling within these plants was higher than those in control plants, implying that xylem and phloem flow velocities via the mesocotyl were considerably higher than in plants with an intact root system. The removal of the seminal roots in addition to restricting shoot-borne root development did not affect whole plant growth and N uptake, except for the stronger compensatory growth of the primary roots. Our results suggest that an adequate N supply to maize plant is maintained by compensatory growth of the remaining roots, increased N uptake rate and flow velocities within the xylem and phloem via the mesocotyl, and reduction in the shoot growth rate.

关键词： nitrogen flow nitrogen uptake root system components Zea mays

Impact of nitrogen addition on plant community in a semi-arid temperate steppe in China

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Journal of Arid Land 2012年第1期4卷 3-10页

作者： Ling SONG XueMei BAO XueJun LIU fusuo zhang Key Laboratory of Plant-Soil Interactions Ministry of Education College of Resources and Environmental Sciences China Agricultural University Beijing 100193 China Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China

Increased nitrogen （N） deposition will often lead to a decline in species richness in grassland ecosystems but the shifts in functional groups and plant traits are still poorly understood in China. A field experiment was conducted at Duolun, Inner Mongolia, China, to investigate the effects of N addition on a temperate steppe ecosystem. Six N levels （0, 3, 6, 12, 24, and 48 g N/（m2-a）） were added as three applications per year from 2005 to 2010. Enhanced N deposition, even as little as 3 g N/（m2.a） above ambient N deposition （1.2 g N/（m2.a））, led to a decline in species richness of the whole community. Increasing N addition can significantly stimulate aboveground biomass of perennial bunchgrasses （PB） but decrease perennial forbs （PF）, and induce a slight change in the biomass of shrubs and semi-shrubs （SS）. The biomass of annuals （AS） and perennial rhizome grasses （PR） accounts for only a small part of the total biomass. Species richness of PF decreased significantly with increasing N addition rate but there was a little change in the other functional groups. PB, as the dominant functional group, has a relatively higher height than others. Differences in the response of each functional group to N addition have site-specific and species-specific characteristics. We initially infer that N enrichment stimulated the growth of PB, which further suppressed the growth of other functional groups.

关键词： nitrogen addition species richness biomass functional group temperate steppe Duolun, Inner Mongolia

Adaptation of Chinese and German maize-based food-feed-energy systems to limited phosphate resources——a new Sino-German international research training group

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Frontiers of Agricultural Science and Engineering 2019年第4期6卷 313-320页

作者： Torsten MULLER fusuo zhang Fertilization and Soil Matter Dynamics Institute of Crop Science(340i)University of Hohenheim70593 StuttgartGermany College of Resources and Environmental Science Department of Plant NutritionChina Agricultural UniversityBeijing 100193China

Phosphate is supplied to agriculture by mining and fertilizer production,followed by different steps of phosphate utilization,including primary production,feed and food consumption,and conversion of biomass,with accumulation in soils,but little recycling and severe environmental *** is a limited essential nutrient,however,with very uneven distribution *** the cycle and reducing primary phosphate consumption are fundamental future *** has a relatively high phosphate *** and Germany together cover the whole range of maize production *** new Sino-German international research training group"Adaptation of Chinese and German maize-based food-feed-energy systems to limited phosphate resources"(AMAIZE-P)was initiated in 2018 as a joint venture of the China Agricultural University(Beijing,China)and the University of Hohenheim(Stuttgart,Germany).The interdisciplinary and complementary research is driven by the hypothesis that under phosphate limited conditions,high productivity and high phosphate use efficiency can be achieved simultaneously by adapting phosphate cycling and availability(sources)to the multipurpose phosphate demands(sinks)in maizebased food-feed-energy *** educational program for doctoral researchers in China and Germany includes joint block seminars,thematic field trips,case studies,methodological courses,doctoral researchers’conferences,intercultural training sessions and personal training.

关键词： international research training group limited resources maize phosphate

Synergistic and antagonistic interactions between potassium and magnesium in higher plants

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The Crop Journal 2021年第2期9卷 249-256页

作者： Kailiu Xie Ismail Cakmak Shiyu Wang fusuo zhang Shiwei Guo Jiangsu Provincial Key Lab of Solid Organic Waste Utilization Jiangsu Collaborative Innovation Center of Solid Organic WastesEducational Ministry Engineering Center of Resource-saving FertilizersNanjing Agricultural UniversityNanjing 210095JiangsuChina School of Land Resources and Environment Jiangxi Agricultural UniversityNanchang 330045JiangxiChina Faculty of Engineering and Natural Sciences Sabanci University34956 IstanbulTurkey International Magnesium Institute College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002FujianChina College of Resources and Environmental Sciences China Agricultural UniversityBeijing 100193China

Magnesium(Mg)affects various critical physiological and biochemical processes in higher plants,and its deficiency impedes plant growth and *** potassium(K)-induced Mg deficiency in agricultural production is widespread,the specific relationship of K with Mg and especially its competitive nature is poorly *** review summarizes current knowledge on the interactions between K and Mg with respect to their root uptake,root-to-shoot translocation and distribution in *** synergistic effects on certain physiological functions are also *** antagonistic effect of K on Mg is stronger than that of Mg on K in root absorption and transport within plants,indicating that the balanced use of K and Mg fertilizers is necessary for sustaining high plant-available Mg and alleviating K-induced Mg deficiency,especially in plant species with high K demand or in highavailable-K *** relationship between Mg and K in plant tissues may be antagonistic or synergistic depending on plant species,cell type,leaf age,source-and sink *** are synergistic effects of K and Mg on photosynthesis,carbohydrate transport and allocation,nitrogen metabolism,and turgor *** of optimal K/Mg ratios for soils and plant tissues is desirable for maintaining proper nutritional status in plants,leading to a physiological state supporting crop *** research should concentrate on identifying the physiological and molecular mechanisms underlying the interactions between K and Mg in a given physiological function.

关键词： Antagonism Functional replacement Magnesium Potassium Synergy

Interactive effects of phosphorus deficiency and exogenous auxin on root morphological and physiological traits in white lupin (Lupinus albus L.)

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Science China(Life Sciences) 2013年第4期56卷 313-323页

作者： TANG HongLiang SHEN JianBo zhang fusuo RENGEL Zed Centre for Resources Environment and Food Security Department of Plant Nutrition Key Laboratory of Plant-Soil Interactions Ministry of Education China Agricultural University College of Life Science Hebei University Soil Science & Plant Nutrition School of Earth and Environment The University of Western Australia

White lupin （Lupinus albus） exhibits strong root morphological and physiological responses to phosphorus （P） deficiency and auxin treatments, but the interactive effects of P and auxin in regulating root morphological and physiological traits are not fully understood. This study aimed to assess white lupin root traits as influenced by P （0 or 250 ~tmol L-1） and auxin （10=8 mol L-1 NAA） in nutrient solution. Both P deficiency and auxin treatments significantly altered root morphological traits, as evi- denced by reduced taproot length, increased number and density of first-order lateral roots, and enhanced cluster-root for- marion. Changes in root physiological traits were also observed, i.e., increased proton, citrate, and acid phosphatase exudation. Exogenous auxin enhanced root responses and sensitivity to P deficiency. A significant interplay exists between P and auxin in the regulation of root morphological and physiological traits. Principal component analysis showed that P availability ex- plained 64.8% and auxin addition 21.3% of the total variation in root trait parameters, indicating that P availability is much more important than auxin in modifying root responses of white lupin. This suggests that white lupin can coordinate root mor- phological and physiological responses to enhance acquisition of P resources, with an optimal trade-off between root morpho- logical and physiological traits regulated by external stimuli such as P availability and auxin.

关键词： cluster root carboxylate exudation proton auxin phosphorus deficiency Lupinus albus

Invitation to Contribute to Frontiers of Agricultural Science and Engineering

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Frontiers of Agricultural Science and Engineering 2023年第4期 499-500页

作者： fusuo zhang China Agricultural University School of Agriculture Green Development China Agricultural University Chinese Academy of Engineering

Colleagues,It is our great pleasure to introduce you to the Frontiers of Agricultural Science and Engineering (FASE),an international journal launched in *** was founded jointly by the Chinese Academy of Engineering,China Agricultural University and Higher Education Press of *** goal is to use FASE as a platform to foster scientific information flow,stimulate transdisciplinary inquiries that have strong multi-disciplinary connections,and cultivate research and idea exchanges that address agricultural sustainability challenges regionally and globally.

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Invitation to Contribute to Frontiers of Agricultural Science and Engineering

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Frontiers of Agricultural Science and Engineering 2023年第2期 151-152页

作者： fusuo zhang China Agricultural University Chinese Academy of Engineering School of Agriculture Green Development China Agricultural University

Colleagues,It is our great pleasure to introduce you to the Frontiers of Agricultural Science and Engineering(FASE), an international journal launched in 2014. FASE was founded jointly by the Chinese Academy of Engine...

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Dynamics of crystallization and dissolution of calcium orthophosphates at the near-molecular level

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Chinese Science Bulletin 2011年第8期56卷 713-721页

作者： WANG LIJun LU JianWei XU FangSen zhang fusuo College of Resources and Environment Huazhong Agricultural University Wuhan 430070 China College of Resources and Environmental Sciences China Agricultural University Beijing 100193 China

Although extensive investigations of biogenic and geological calcium phosphate crystallization/dissolution and their phase transformations have been performed,the mechanisms of crystallization and dissolution of sparingly soluble calcium phosphates in geological settings have not been completely determined at the near-molecular *** particular,an understanding of the physical-chemical processes at the earliest nucleation stage and the subsequent crystal surface dynamics in soil solutions is *** review focuses on the earliest events in homo/heterogeneous nucleation from an initial supersaturated solution phase,the subsequent growth of calcium phosphate phases,and the relevant influences of the presence of additional inorganic and organic molecules in both geological and biological *** studies have implications for the understanding of the complex processes of calcium phosphate transformations in soils,and provide possible physical-chemical mechanisms for the biogeochemical behavior of phosphorus at the near-molecular level.

关键词：钙磷酸盐分子水平溶解结晶物理化学过程生物环境地球化学行为土壤溶液

Invitationto Contributeto Frontiers of Agricultural Science and Engineering

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Frontiers of Agricultural Science and Engineering 2023年第3期10卷 I0004-I0005页

作者： fusuo zhang School of Agriculture Green Development China Agricultural University Chinese Academy of Engineering China Agricultural University

关键词： jointly journal founded

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