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Inner Envelope CHLOROPLAST MANGANESE TRANSPORTER 1 Supports Manganese Homeostasis and Phototrophic Growth in Arabidopsis

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molecular plant 2018年第7期11卷 943-954页

作者： Bin Zhang Chi Zhang Congge Liu Yanping Jing Yuan Wang Ling Jin Lei Yang Aigen Fu Jisen Shi Fugeng Zhao Wenzhi Lan Sheng Luan nanjing university-nanjing forestry university joint institute for plant molecular biology College of Life Sciences Nanjing University Nanjing 210093 China The Key Laboratory of Western Resources biology and Biological Technology College of Life Sciences Northwest University Xi'an China nanjing university-nanjing forestry university joint institute for plant molecular biology Key Laboratory of Forest Genetics and BiotechnologyNanjing Forestry University Nanjing 210037 China Department of plant and Microbial biology University of California Berkeley CA 94720 USA These authors contributed equally to this article.

Manganese （Mn） is an essential catalytic metal in the Mn-cluster that oxidizes water to produce oxygen dur- ing photosynthesis. However, the transport protein（s） responsible for Mn2＋ import into the chloroplast re- mains unknown. Here, we report the characterization ofArabidopsis CMT1 （Chloroplast Manganese Trans- porter 1）, an evolutionarily conserved protein in the Uncharacterized Protein Family 0016 （UPFO016）, that is required for manganese accumulation into the chloroplast. CMT1 is expressed primarily in green tissues, and its encoded product is localized in the inner envelope membrane of the chloroplast. Disruption of CMT1 in the T-DNA insertional mutant cmtl-1 resulted in stunted plant growth, defective thylakoid stacking, and severe reduction of photosystem II complexes and photosynthetic activity. Consistent with reduced oxy- gen evolution capacity, the mutant chloroplasts contained less manganese than the wild-type ones. In sup- port of its function as a Mn transporter, CMT1 protein supported the growth and enabled Mn2＋ accumula- tion in the yeast cells of Mn2＋-uptake deficient mutant （3smfl）. Taken together, our results indicate that CMT1 functions as an inner envelope Mn transporter responsible for chloroplast Mn2＋ uptake.

关键词： chloroplast inner envelope manganese transporter metal transport oxygen-evolving complex

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plant Membrane Transport Research in the Post-genomic Era

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plant Communications 2020年第1期1卷 64-81页

作者： Ren-Jie Tang Mingda Luan Chao Wang Dhondup Lhamo Yang Yang Fu-Geng Zhao Wen-Zhi Lan Ai-Gen Fu Sheng Luan Department of plant and Microbial biology University of CaliforniaBerkeleyCA 94720USA College of Life Sciences Northwest UniversityXi’an 710069China nanjing university–nanjing forestry university joint institute for plant molecular biology College of Life SciencesNanjing UniversityNanjing 210093China

Membrane transport processes are indispensable for many aspects of plant physiology including mineral nutrition,solute storage,cell metabolism,cell signaling,osmoregulation,cell growth,and stress *** of genome sequencing in diverse plant species and the development of multiple genomic tools have marked a new era in understanding plant membrane transport at the mechanistic *** coding for a galaxy of pumps,channels,and carriers that facilitate various membrane transport processes have been identified while multiple approaches are developed to dissect the physiological roles as well as to define the transport capacities of these transport ***,signaling networks dictating the membrane transport processes are established to fully understand the regulatory ***,we review recent research progress in the discovery and characterization of the components in plant membrane transport that take advantage of plant genomic resources and other experimental *** also provide our perspectives for future studies in the field.

关键词： membrane transport ion channels transporters signaling networks genomics Arabidopsis

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Advances in ethnopharmacology,phytochemistry and pharmacology of Erigerontis Herba and its Chinese medicine prescriptions

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Traditional Medicine Research 2025年第1期10卷 44-61页

作者： Yang Zhou Yuan-Yan Huang Ding-Yue Shang Ying Chen Meng Tian Cheng-Yu Jin Xin Lu Bing-Chun Yan Han-Qing Pang institute of Translational Medicine School of MedicineYangzhou UniversityYangzhou 225009China Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases Yangzhou UniversityYangzhou 225009China School of Medicine Nanjing University of Chinese MedicineNanjing 210023China State Key Laboratory for Chemistry and molecular Engineering of Medicinal Resources Guangxi Normal UniversityGuiling 541004China.

Erigerontis Herba(EH),the dried whole plant of Erigeron breviscapus,is well-known for circulating blood,activating meridians to alleviate pain,expelling wind,and clearing away *** has been extensively utilized in southern China for the treatment of stroke hemiplegia,chest stuffiness and pains,rheumatic arthralgia,headache,and *** review focuses on the botany,ethnopharmacology,phytochemistry,pharmacology and toxicity of EH and its related prescriptions to offer new insights for prospective research of *** information about EH was retrieved from ancient records and books,PubMed,China National Knowledge Infrastructure,Chinese Pharmacopoeia,Web of Science,Doctoral and Master’s Theses,and various electronic *** is a member of Compositae family and is mainly grown in southern *** Chinese medicine records that EH has the effects of circulating blood and removing blood stasis,expelling wind,and removing cold,as well as relieving rigidity of muscle and relieving *** now,nearly 200 ingredients have been characterized from EH,including flavonoids,caffeoyls,aromatic acids,coumarins,pentacyclic terpenoids,volatile oil and other *** extracts,EH related prescriptions(Dengzhan Xixin injection,Dengzhan Shengmai capsules,etc.)or compounds(scutellarin,scutellarein,etc.)possessed obvious therapeutic effects of ischemic stroke,cerebral hemorrhage,myocardial infarction,Alzheimer’s disease,diabetes and its complications,gastric cancer,bone,and joint degenerative ***,the major active compound of EH,has been used as a quality *** no obvious toxicity of EH has been *** to its traditional applications,ethnopharmacology,phytochemistry,pharmacology,and toxicity,EH was applied as a valuable herb for clinical application in food and medicine *** several compounds have been shown to possess diverse biological activities,the underlying mechanisms of their actions remain *** fully exploi

关键词： Erigeron breviscapus traditional applications ethnopharmacology phytochemistry pharmacology

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Seed handling by primary frugivores differentially influence post-dispersal seed removal of Chinese yew by ground-dwelling animals

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Integrative Zoology 2016年第3期11卷 191-198页

作者： Yang PAN Bing BAI Tianshi XIONG Peijian SHI Changhu LU Laboratory of plant-Animal Interactions Nanjing Forestry UniversityNanjingChina Yunnan forestry Technological College KunmingChina Bamboo Research institute Nanjing Forestry UniversityNanjingChina

Seed handling by primary frugivores can influence secondary dispersal and/or predation of post-dispersal seeds by attracting different guilds of ground-dwelling *** studies have focused on seeds embedded in feces of mammals or birds;however,less is known about how ground-dwelling animals treat seeds regurgitated by birds(without pulp and not embedded in feces).To compare the effect of differential seed handling by primary dispersers on secondary seed removal of Chinese yew(Taxus chinensis ***),we conducted a series of exclosure experiments to determine the relative impact of animals on the removal of defecated seeds(handled by masked palm civet),regurgitated seeds(handled by birds)and intact *** types of yew seeds were consistently removed at a higher rate by rodents than by *** seeds had the highest removal percentage and were only removed by *** seeds were probably eaten in situ without being secondarily dis*** seeds were removed by both rodents and ants;only ants might act as secondary dispersers of defecated seeds,whereas rodents ate most of *** inferred that seeds regurgitated by birds were subjected to the highest rates of predation,whereas those dispersed in the feces of masked palm civets probably had a higher likelihood of secondary *** from feces attracted ants,which were likely to transport seeds and potentially provided a means by which the seeds could escape predation by *** study highlighted that primary dispersal by birds might not always facilitate secondary dispersal and establishment of plant populations.

关键词： arils defecated seeds regurgitated seeds secondary seed dispersal Taxus chinensis

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An Arabidopsis vasculature distributed metal tolerance protein facilitates xylem magnesium diffusion to shoots under high-magnesium environments

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Journal of Integrative plant biology 2022年第1期64卷 166-182页

作者： Haiman Ge Yuan Wang Jinlin Chen Bin Zhang Rui Chen Wenzhi Lan Sheng Luan Lei Yang nanjing university–nanjing forestry university joint institute for plant molecular biology College of Life SciencesNanjing UniversityNanjing 210093China Shanghai Center for plant Stress biology CAS Center for Excellence in Molecular Plant SciencesShanghai 201602China Chinese Education Ministry’s Key Laboratory of Western Resources and Modern Biotechnology Key Laboratory of Biotechnology Shaanxi ProvinceCollege of Life SciencesNorthwest UniversityXi'an 710069China Department of plant and Microbial biology University of CaliforniaBerkeleyCalifornia 94702USA

Magnesium(Mg^(2+)) is an essential metal for plant growth;however, its over-accumulation in cells can be cytotoxic. The metal tolerance protein family(MTP) belongs to an ubiquitous family of cation diffusion facilitator(CDF) proteins that export divalent metal cations for metal homeostasis and tolerance in all organisms. We describe here the identification of MTP10 to be critical for xylem Mg homeostasis in Arabidopsis under high Mg^(2+) conditions. The Arabidopsis plant contains 12 MTP genes, and only knockout of MTP10 decreased the tolerance of high-Mg stress. The functional complementation assays in a Mg^(2+)-uptake-deficient bacterial strain MM281 confirmed that MTP10 conducted Mg;***10 is localized to the plasma membrane of parenchyma cells around the xylem. Reciprocal grafting analysis further demonstrated that MTP10 functions in the shoot to determine the shoot growth phenotypes under high Mg^(2+) ***, compared to the wild type, the mtp10 mutant accumulated more Mg^(2+) in xylem sap under high-Mg stress. This study reveals that MTP10 facilitates Mg^(2+) diffusion from the xylem to shoots and thus determines Mg homeostasis in shoot vascular tissues during high-Mg stress.

关键词： allocation Arabidopsis Mg^(2+)toxicity root-to-shoot translocation

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A Thylakoid Membrane Protein Functions Synergistically with GUN5 in Chlorophyll Biosynthesis

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plant Communications 2020年第5期1卷 100-110页

作者： Chi Zhang Bin Zhang Baicong Mu Xiaojiang Zheng Fugeng Zhao Wenzhi Lan Aigen Fu Sheng Luan The Key Laboratory of Western Resources biology and Biological Technology College of Life SciencesNorthwest UniversityXi’an 710069China nanjing university-nanjing forestry university joint institute for plant molecular biology College of Life SciencesNanjing UniversityNanjing 210093China Temasek Life Sciences Laboratory Singapore 117604Republic of Singapore Department of plant and Microbial biology University of CaliforniaBerkeleyCA 94720USA

Chlorophyll(Chl)is essential for photosynthetic reactions and chloroplast *** the enzymatic pathway for Chl biosynthesis is well established,the regulatory mechanism underlying the homeostasis of Chl levels remains largely *** this study,we identified CBD1(Chlorophyll Biosynthetic Defect1),which functions in the regulation of chlorophyll *** CBD1 gene was expressed specifically in green tissues and its protein product was embedded in the thylakoid ***,CBD1 was precisely co-expressed and functionally correlated with GUN5(Genome Uncoupled 5).Analysis of chlorophyll metabolic intermediates indicated that cbd1 and cbd1gun5 mutants over-accumulatedmagnesium protoporphyrin Ⅸ(Mg-Proto Ⅸ).In addition,the cbd1 mutant thylakoid contained less Mg than the wild type not only as a result of lower Chl content,but also implicating CBD1 in Mg *** was supported by the finding that CBD1 complemented a Mg^(2+)uptake-deficient Salmonella strain under low Mg *** together,these results indicate that CBD1 functions synergistically with CHLH/GUN5 in Mg-Proto IX processing,and may serve as a Mg-transport protein to maintain Mg homeostasis in the chloroplast.

关键词： chlorophyll biosynthesis magnesium thylakoid membrane GUN5 magnesium protoporphyrin

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molecular Mechanism Underlying plant Response to Cold Stress

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Phyton-International Journal of Experimental Botany 2023年第9期92卷 2665-2682页

作者： Yiwei Cao Delight Hwarari Yasmina Radani Yuanlin Guan Liming Yang College of biology and the Environment Nanjing Forestry UniversityNanjingChina

Low temperature stress is one of the most important factors limiting plant growth and geographical *** order to adapt to low temperature,plants have evolved strategies to acquire cold tolerance,known as,cold *** molecular and genomic studies have reported that annual herbaceous and perennial woody plants share similar cold acclimation ***,woody perennials also require extra resilience to survive cold ***,trees have acquired complex dynamic processes to control the development of dormancy and cold resistance,ensuring successful tolerance during the coldest winter *** this review,we systemically described how woody plants perceive and transduce cold stress signals through a series of physiological changes such as calcium signaling,membrane lipid,and antioxidant changes altering downstream gene expression and epigenetic modification,ultimately bud *** extended the discussion and reviewed the processes endogenous phytohormones play in regulating the cold *** believe that this review will aid in the comprehension of underlying mechanisms in plant acclimation to cold stress.

关键词： Calcium signaling cold stress C-repeat binding factor(CBF) dormancy plants

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A Calcium-Dependent Protein Kinase Interactswith and Activates A Calcium Channel toRequlate Pollen Tube Growth

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molecular plant 2014年第2期7卷 369-376页

作者： Liming Zhou[a][b] Wenzhi Lan[a][c] Yuanqing Jiang[a] Wei Fang[b] Sheng Luan[a] [a] Department of plant and Microbial biology University of California Berkeley CA 94720 USA [b] College of Life Sciences Hebei United University Tangshan Hebei 063000 China [c] NJU–NJFU joint institute for plant molecular biology School of Life Sciences Nanjing University Nanjing 210093 China

ABSTRACT Calcium, as a ubiquitous second messenger, plays essential roles in tip-growing cells, such as animal neu-rons, plant pollen tubes, and root hairs. However, little is known concerning the regulatory mechanisms that code anddecode Ca2＋ signals in plants. The evidence presented here indicates that a calcium-dependent protein kinase, CPK32,controls polar growth of pollen tubes. Overexpression of CPK32 disrupted the polar growth along with excessive Ca2＋accumulation in the tip. A search of downstream effector molecules for CPK32 led to identification of a cyclic nucleotide-gated channel, CNGC18, as an interacting partner for CPK32. Co-expression of CPK32 and CNGC18 resulted in activationof CNGC18 in Xenopus oocytes where expression of CNGC18 alone did not exhibit significant calcium channel *** of CNGC18 produced a growth arrest phenotype coupled with accumulation of calcium in the tip, simi-lar to that induced by CPK32 overexpression. Co-expression of CPK32 and CNGC18 had a synergistic effect leading tomore severe depolarization of pollen tube growth. These results provide a potential feed-forward mechanism in whichcalcium-activated CPK32 activates CNGC18, further promoting calcium entry during the elevation phase of Ca2＋ oscilla-tions in the polar growth of pollen tubes.

关键词： pollen tubes calcium-dependent protein kinase cyclic nucleotide-gated channel Ca2+ oscillations

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Importance of bird traits for seed dispersal patterns of co-fruiting trees in a patchy forest

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Integrative Zoology 2019年第5期14卷 470-478页

作者： Ning LI Zheng WANG Shuai ZHANG Chuan YAN Xinhai LI Changhu LU institute of Applied Ecology Nanjing Xiaozhuang UniversityNanjingJiangsuChina College of biology and Environmental Science Nanjing Forestry UniversityNanjingChina institute of Zoology Chinese Academy of SciencesBeijingChina

Habitat fragmentation is globally one of the most important drivers of change in *** dispersal by birds is crucial for tree regeneration in remnant patchy forests,yet how bird traits affect seed dispersal pattern is still poorly *** studied the extent to which bird traits affect seed-removal networks and whether these traits affect seed deposition and seedling recruitment for 3 co-fruiting tree species(Taxus chinensis,Cinnamomum bodinieri and Machilus thunbergii)in a patchy forest.A total of 17,18 and 10 bird species were recorded foraging for seeds of ***,*** and ***,*** of bird visitation increased with tail length,wing length and body ***,bird body length,bill length,body weight and wing length were important in the strength of the seed removal *** foraging,6 bird species exhibited different patterns of microhabitat utilization and their perching frequency increased with bird weight and tarsus *** a consequence,frequency of habitat use,bird length and tarsus length were important in determining the number of deposited *** seedling recruitment,seedling number increased with bird tarsus length and weight,but decreased with wing ***,our results showed that various bird traits not only affected seed removal,but also influenced the subsequent processes of seed deposition and seedling distribution in a patchy *** results thus highlight the importance of large-bodied birds for plant recruitment and point out the need to prioritize the protection and conservation of these birds in remnant patchy forests.

关键词： bird traits patchy forest seed deposition seed dispersal seed removal

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Importance of plant and bird traits on the seed removal pattern of endangered trees across different forest patches in southeast China

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Ecological Processes 2020年第1期9卷 499-504页

作者： Ning Li Shuai Zhang Yuan-Hao Ren Zheng Wang institute of Applied Ecology Nanjing Xiaozhuang UniversityNanjing 211171JiangsuChina College of biology and Environmental Science Nanjing Forestry UniversityNanjing 210037China

Seed removal by birds has been recognized as an important part of seed dispersal process in patchy forest areas;however,few studies have focused on the contribution of both plant and bird traits to seed *** this study,field data of seed removal for Taxus chinensis was combined with the data of bird and plant traits for *** relevant traits of plants and birds that influenced ***-bird interaction were identified in a remnant patchy forest in yew ecological garden,Fujian Province,southeast *** bird species were found to forage and remove the seeds of *** number of bird species varied in different forest patches;however,their contribution to seed removal showed no significant *** bird and plant traits were found to affect seed *** seed removal rate was positively affected by bird traits,such as foraging frequency and wing length,but decreased with body *** plant traits,such as number of fruits,tree height,canopy density,and crown width,which are related to safe shelter and food resource conditions,increased the seed removal *** results underline the functional importance of bird and plant traits in the seed removal from endangered trees in patchy ***,future conservation strategies should prioritize and recognize the role of both plant and bird traits in seed dispersal in remnant patchy forests.

关键词： Seed removal Bird trait plant trait Hypsipetes leucocephalus Patchy forest

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