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The 2/3 scaling of twig nitrogen to phosphorus in woody plants

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Forest Ecosystems 2022年第4期9卷 521-528页

作者： Zhiqiang Wang Karl JNiklas Zeqing Ma dechun jiang Jianming Deng Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station Southwest Minzu UniversityChengdu610041China Institute of Qinghai-Tibetan Plateau Southwest Minzu UniversityChengdu610041China Plant Biology Section School of Integrative Plant ScienceCornell UniversityIthacaNY14853USA Center for Forest Ecosystem Studies and Qianyanzhou Ecological Station Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China Chengdu Institute of Biology Chinese Academy of SciencesChengdu610041China State Key Laboratory of Grassland Agro-Ecosystem College of EcologyLanzhou UniversityLanzhou730000China

Background:Nitrogen(N)and phosphorus(P)are important elements for plant metabolism and ***fore,the quantification of the scaling relationship of N to P in plant organs can help us understand many fundamental ecological *** general scaling relationships between N and P in leaves and in fine roots have been *** compared to leaves and fine roots,however,little information is available on the N versus P scaling relationship in the stems of woody plants,especially for *** this study,a comprehensive dataset comprising 2,038 N=P paired observations for a total of 536 woody species was compiled and analyzed to determine whether a general scaling relationship ***:The global mean values of twig N and P concentrations and N:P ratios were 9.33 mg⋅g^(-1),1.12 mg⋅g^(-1) and 10.16,*** N and P concentrations and N:P ratios differed significantly within and across functional groups and *** all of the species,a uniform 0.67 scaling exponent of twig N to P was observed across different functional groups and biomes,i.e.,a 2/3-power scaling relationship was ***,this numerical value differed across different sites,albeit converging onto 0.67 with increasing sample *** total phosphorus was the largest contributor to the variation in the numerical value of the scaling ***:These results provide useful parameters for stoichiometric growth models,and advance our understanding of the mechanisms underlying plant nutrient *** study has potential implications in predicting responses of nutrient cycling in terrestrial ecosystem responses to changes in the environment.

关键词： Nitrogen Phosphorus Scaling exponents Twigs Woody plants

A New Species of the Genus Scincella Mittleman,1950(Squamata:Scincidae)from Sichuan Province,Southwest China

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Asian Herpetological Research 2024年第2期15卷 115-129页

作者： Ruwan JIA Zongyuan GAO Dihao WU Jinlong REN dechun jiang Wei WU CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization&Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of BiologyChinese Academy of SciencesChengdu 610213SichuanChina University of Chinese Academy of Sciences Beijing 100049China

The genus Scincella Mittleman,1950,within the family Scincidae,is a diverse group comprising 39 described *** taxonomy of the genus is complex due to morphological similarities among species,which often obscures the true extent of biodiversity,resulting in several undescribed species requiring further *** China,particularly within the unique ecosystems of the Hengduan Mountains,the diversity of Scincella is notably underestimated,with only 12 species currently *** the present study,we describe a new species of the genus Scincella,Scincella liangshanensis ***.,from Sichuan Province,Southwest *** characteristics and phylogenetic analyses revealed that the putative new species is distinct from all other known *** discovery not only expands the known diversity of Scincella but also emphasizes the inadequacies in our current understanding of herpetological diversity in *** addition of this species to the scientific record highlights the necessity for ongoing biodiversity assessments to uncover hidden species and enhance our understanding of the intricate web of life in one of the world’s biodiversity hotspots.

关键词： morphology phylogeny Scincella liangshanensis sp.nov. taxonomy the Hengduan Mountains

Asymmetric biotic interchange across the Bering land bridge between Eurasia and North America

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National Science Review 2019年第4期6卷 739-745页

作者： dechun jiang Sebastian Klaus Ya-Ping Zhang David M.Hillis Jia-Tang Li CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of Biology Chinese Academy of Sciences Department of Ecology and Evolution J.W.Goethe University State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology Chinese Academy of Sciences CAS Center for Excellence in Animal Evolution and Genetics Chinese Academy of Sciences Department of Integrative Biology and Biodiversity Center University of Texas at Austin

The exchange of biotas between Eurasia and North America across the Bering land bridge had a major impact on ecosystems of both continents throughout the Cenozoic. This exchange has received particular attention regarding placental mammals dispersing into the Americas, including humans after the last glacial period, and also as an explanation for the disjunct distribution of related seed plants in eastern Asia and eastern North America. Here, we investigate bi-directional dispersal across the Bering land bridge from estimates of dispersal events based on time-calibrated phylogenies of a broad range of plant, fungus and animal taxa. We reveal a long-lasting phase of asymmetrical biotic interchange, with a peak of dispersal from Asia into North America during the late Oligocene warming(26–24 Ma), when dispersal in the opposite direction was greatly decreased. Influx from North America into Asia was lower than in the opposite direction throughout the Cenozoic, but with peak rates of dispersal at the end of the Eocene(40–34 Ma)and again in the early to middle Miocene(16–14 Ma). The strong association between dispersal patterns and environmental changes suggests that plants, fungi and animals have likely dispersed from stable to perturbed environments of North America and Eurasia throughout the Cenozoic.

关键词： multiple taxa biogeography Bering land bridge Cenozoic

Taxonomic Status of Three Recently Proposed Species of the Genus Kurixalus(Anura,Rhacophoridae),with Discussion on the ZooBank Registrations for Electronical Publication

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Asian Herpetological Research 2024年第1期15卷 31-40页

作者： Zhitong LYU Maoliang LI Guanqi WANG Gang LIU Min LIU Ke jiang dechun jiang Jiatang LI CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan ProvinceChengdu Institute of BiologyChinese Academy of SciencesChengdu 610040SichuanChina Chengdu Nature Reserve and Wildlife Protection Center Chengdu 610081SichuanChina University of Chinese Academy of Sciences Beijing 100049China

In the present study,we propose the synonymization of Kurixalus silvaenaias with Kurixalus *** conclusion is based on morphological examination and phylogenetic analysis of a series of newly collected specimens,as well as the type series of both *** publication dates of the two species were determined according to the related articles of the International Code of Zoological *** note,the ZooBank registrations for both species are ***,the publication of *** does not qualify as a published work and the correct publication date of *** should be the date on which it was physically ***,based on the results presented in this study and its original description,the proposal of *** is deemed untenable and should,therefore,be considered a junior synonym of *** further provide suggestions for the authors,editors,and publishers who are working on taxonomic publications,as well as for ZooBank to improve the registering service.

关键词： Kurixalus inexpectatus Kurixalus qionglaiensis Kurixalus silvaenaias nomenclature the Code

Taxonomic Revision of Raorchestes menglaensis(Kou,1990)(Amphibia:Anura),with Descriptions of Two New Species from Yunnan,China

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Asian Herpetological Research 2020年第4期11卷 263-281页

作者： Ke jiang Jinlong REN Jian WANG Junfeng GUO Zeng WANG Yonghong LIU dechun jiang Jiatang LI CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of BiologyChinese Academy of SciencesChengdu 610041SichuanChina Southeast Asia Biodiversity Research Institute Chinese Academy of SciencesYezinNay Pyi Taw 05282Myanmar College of Life Science and Technology Honghe UniversityMengzi 661199YunnanChina Xishuangbanna Tropical Botanical Garden Chinese Academy of SciencesXishuangbanna 666303YunnanChina University of Chinese Academy of Sciences Beijing 100049China CAS Center for Excellence in Animal Evolution and Genetics Chinese Academy of SciencesKunming 650223YunnanChina

Raorchestes is a group of Bush frogs mainly distributed in South and Southeast Asia that are poorly recognized by morphological *** recognize the true ***(Kou) based on 10 specimens newly collected from the type *** expanded description is also provided,and we delist the recently reported record,***(Boulenger) from *** with morphological and molecular data,two new species are respectively described from Menghai and Lvchun,Yunnan,*** hillisi *** distinguished from all other congeners by the following combination of morphological characters:(1) small body sized(males 15.9-17.7 mm,n=7;female 17.5 mm,n=1);(2) head longer than wide;(3) snout longer than eye diameter;(4) the tip of upper jaws slightly notched;(5) internasal space slightly less than interorbital space;(6) tympanum distinct;(7)fingers lacking lateral dermal fringe;(8) outside of toe Ⅰ and both sides of toe Ⅱ lacking lateral dermal fringe,other toes having weak lateral dermal fringes;(9) rudimentary web on toes;(10) lacking a series of tubercles along the outer sides of forearm and foot;(11) discs of fingers and toes not *** huanglianshan *** distinguished from all other congeners by the following combination of morphological characters:(1) small body size(males 17.0-19.6 mm,n=12;female 21.5 mm,n=1);(2) head slightly wider than long or equal;(3) snout longer than eye diameter;(4)the tip of upper jaws slightly notched;(5) internasal space distinctly less than interorbital space(6) tympanum distinct;(7) fingers lacking lateral dermal fringe;(8) toes lacking lateral dermal fringe;(9) rudimentary web on toes;(10)lacking a series of tubercles along the outer sides of forearm and foot;(11) discs of all fingers and toes orange or parts of them orange in life.

关键词： bush frog distribution Raorchestes hillisi sp.nov. Raorchestes huanglianshan sp.nov. Raorchestes parvulus revision taxonomy

Morphology and Histochemistry of Infralabial Glands of Two Species in the Slug-Eating Family Pareidae(Reptilia:Serpentes)

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Asian Herpetological Research 2022年第3期13卷 180-189页

作者： Dan WANG Jinlong REN Ke jiang Wei WU Changjun PENG Hussam ZAHER dechun jiang Jiatang LI CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan ProvinceChengdu Institute of BiologyChinese Academy of SciencesChengdu 610041SichuanChina University of Chinese Academy of Sciences Beijing 100049China Museu de Zoologia Universidade de Sao PauloSao Paulo 04263-000SPBrazil Southeast Asia Biodiversity Research Institute Chinese Academy of SciencesYezinNay Pyi Taw 05282Myanmar

Pareidae and Dipsadidae,two independently evolved taxa in the Serpentes lineage,both feed exclusively on terrestrial mollusks(snails and slugs).Dipsadid snakes developed hypertrophic infralabial glands in their lower jaw,which are thought to be associated with their specialized feeding ***,whether a similar gland exists in pareid snakes is *** this study,we examined the morphological characteristics of the infralabial glands in Pareas berdmorei and Pareas chinensis based on comparative anatomical,histochemical,and histopathological *** results demonstrated that both Pareas species had similar hypertrophied infralabial glands in the lower jaw,which consisted of tubules with mucinous properties and seromucous *** secretory granules of the seromucous cells also showed high electron *** cytoplasm was rich in rough endoplasmic reticulum,mitochondria,and Golgi apparatus,suggesting that these cells may secrete protein substances,and play an important role in digesting *** study provides evidence of morphological convergence between Pareidae and Dipsadidae due to specialized diet adaptation,which will be the foundation for prospective functional research.

关键词： convergent evolution histology Pareas berdmorei pareas chinensis specialized diet

Evolution of Phenotype and Mitochondrial Genome Reveals Limbless and Body-elongated Squamates may Change Their Energy Basis for Locomotion

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Asian Herpetological Research 2021年第2期12卷 213-220页

作者： Zeng WANG Wei WU Jinlong REN Changjun PENG dechun jiang Jiatang LI CAS Key Liboratory of Mountain Ecological Restoration and Bioresource Utilization<&Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of BiologyChinese Academy of SciencesChengdu 610041SichuanChina University of Chinese Academy of Sciences Beijing 100049China Southeast Asia Biodiversity Research Institute Chinese Academy of SciencesYezin Nay Pyi Taw 05282Myanmar CAS Center for Excellence in Animal Evolution and Genetks Chinese Academy of SciencesKunming 650223YunanChina

Limb reduction in Squamata present the dramatic characteristic to focus and usually accompanied with particularly morphological modifications, impacting tremendous locomotion changing and might generate different energy requirement. Herein, we combined both morphological and mitochondrial genomic data to explore the evolution of phenotypic transformation and mitochondrial genome of limbless and body-elongated squamates. We collected phenotypic measurements of 503 individuals, representing limbed or limbless taxa across all major lineages in Squama ta to investiga te the morphological correla tions with limb-reduction. Furthermore, we provided the mitochondrial genome of the representative limbless and elongated species Dibamus bourreti(Angel, 1935) to detect selective constraints on limbless clades with published mitogenomes of other squa ma te reptiles. Our results evidenced tha t body elongation had certain negative relationship with limbreduction in Squamata lineage and Lacertilia lineage(R = –0.495, P < 2.2 e-16;R= –0.332, P = 1.1 e-13, respectively), while tail length showed slight correlation in both clades(R = 0.156, P = 4.3 e-04;R= 0.192, P = 2.1 e-05, respectively). Besides, detection demonstrated that ATP6 has experienced accelerated evolution among limbless lineages, suggesting selective pressure on mitogenomes may play an essential role in energy disparity for locomotion of limbed and limbless squamates.

关键词： limb-reduction mitogenome morphology selective pressure Squamata

Protective Effect of Silent Mating Type Information Regulation 2 Homolog 1 on TGF-β1 Pathway via mTOR in Diabetic Nephropathy

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Journal of Biosciences and Medicines 2023年第2期11卷 194-207页

作者： Yanting Gu dechun jiang Pengcheng Xu Yanchun Wang Pharmacy China Aerospace Science & Industry Corporation 731 Hospital Beijing China Pharmacy Beijing Shijitan Hospital Affiliated to Capital Medical University Beijing China Ear Institute School of Medicine Shanghai Jiao Tong University Shanghai China Pharmacy Aviation General Hospital Beijing China

Objective: To demonstrate whether the expression of silent mating type information regulation 2 homolog 1 (SIRT1) affects the level of TGF-β1 and Smad3 in HEK293 cells through regulating mTOR. Methods: First, recombinant plasmids DNA (rSIRT1) and siRNA targeting SIRT1 were constructed which were transfected into Human Embryonic Kidney 293 cell (HEK293) cells, respectively. Then, the generation of intracellular ROS in cells was examined by flow cytometry using the oxidation-sensitive probe. Last, the expressions of TGF-β1, smad3, P53, mTOR, p-mTOR, LC3-I and LC3-II in cells were detected to observe the effect of SIRT1 on TGF-β1 Pathway by western blot analysis. Results: We demonstrated that overexpressing of SIRT1 may decrease TGF-β1 and Smad3 expression in HEK293 cells through regulating mTOR. In addition, the result is the opposite when SIRT1 was silent in HEK293 cells. Conclusions: SIRT1 is closely related to TGF-β1/Smad3 pathway that correlates with the regulation of mTOR and ROS generation and causes diabetic nephropathy. The available evidence implies that SIRT1 has great potential as a clinical target for the prevention and treatment of renal fibrosis in the development of DN.

关键词： Silent Mating Type Information Regulation 2 Homolog 1 mTOR Diabetic Nephropathy Autophagy Oxidative Stress

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蛙类前肢形态对树栖环境的适应性演化

四川动物 2018年第4期37卷 400-405页

作者：杨曈姜德纯党宁馨李家堂中国科学院成都生物研究所中国科学院山地生态恢复与生物资源利用重点实验室生态恢复与生物多样性保育四川省重点实验室成都610041 中国科学院大学北京100049

无尾目Anura是现存两栖类中生物多样性最丰富的类群,在多种生态环境中都有分布,根据生境的不同可以划分为极具代表性的2类:树栖蛙类与非树栖蛙类,这两类的前肢形态具有较大差异。为了探究无尾目前肢形态与生境和系统发育之间的关系,本... 详细信息

无尾目Anura是现存两栖类中生物多样性最丰富的类群,在多种生态环境中都有分布,根据生境的不同可以划分为极具代表性的2类:树栖蛙类与非树栖蛙类,这两类的前肢形态具有较大差异。为了探究无尾目前肢形态与生境和系统发育之间的关系,本研究收集629号保存完好的无尾目标本的前肢形态学数据,通过Wilcoxon秩和检验比较了树栖蛙类和非树栖蛙类的前肢形态差异,并利用系统发育独立差(PIC)的方法评估观察到的差异。结果表明,树栖蛙类的相对手长长于非树栖蛙类,相对手长和相对前臂长的进化分别与不同因素相关,其中生境是树栖蛙类相对手长延长的主要相关因素(Wilcoxon秩和检验:P=2.20e-16;PIC:P=2.34e-05,r2=0.465 8);相对前臂长主要受遗传因素的影响,与生境的关系并不明显(Wilcoxon秩和检验:P=1.77e-05;PIC:P=0.058 4,r2=0.118 1)。本研究结合形态特征、系统发育关系和生境,有助于更好地了解前肢形态的进化与生境之间的关系,进而为无尾目物种的环境适应性进化研究提供支持。

关键词：树栖适应形态进化手长前臂长蛙类