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asexual reproduction of Aurelia coerulea Polyps in situ on Settling Plates in Jiaozhou Bay,China

Journal of Ocean University of China 2024年第5期23卷 1371-1380页

作者： MI Tiezhu ZHU Jianbin ZHEN Yu WANG Guoshan WANG Jianyan Key Laboratory of Marine Environment and Ecology Ministry of EducationCollege of Environmental Science and EngineeringOcean University of ChinaQingdao 266100China Laboratory for Marine Ecology and Environmental Science Qingdao Marine Science and Technology CenterQingdao 266237China Frontiers Science Center for Deep Ocean Multispheres and Earth System Ocean University of ChinaQingdao 266100China National Marine Hazard Mitigation Service Ministry of Natural ResourcesBeijing 100194China Department of Life Sciences National Natural History Museum of ChinaBeijing 100050China

Jellyfish blooms are increasingly prevalent coastal phenomena,with Aurelia coerulea being a significant *** complex life history of jellyfish,featuring a sessile polyp stage,is a key factor in bloom formation,yet it is challenging to study in the *** study aimed to describe the asexual reproduction of *** polyps in Jiaozhou Bay,China,and to assess their ability to form sedentary colonies and their relationship with environmental *** settling plates,we observed polyps in situ and documented three asexual reproduction modes:budding,strobilation,and podocyst *** parameters including temperature,salinity,dissolved oxygen(DO),chlorophyll a(Chl a),and the biomass of phytoplankton and zooplankton were *** was the predominant reproductive method,featuring stolon budding in autumn and direct budding during the winter and spring *** took place in the colder months,releasing ephyrae between April and *** abundance was positively correlated with seawater temperature and negatively correlated with DO *** at 1.0 m depth showed higher survivorship and proliferation over 8 months,whereas those at 2.0 m depth experienced a steady decline and died within 4 *** study enhances our understanding of the life cycle and asexual reproduction strategies of *** polyps in the field,with implications for predicting and managing jellyfish *** findings underscore the importance of temperature and DO in polyp survival and suggest that initial polyp population proliferation is crucial for long-term survival.

关键词： jellyfish bloom polyps budding strobilation asexual reproduction

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Different Responses of Sexual and asexual reproduction of Arundinella hirta to Flooding

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Frontiers in Biology 2006年第1期1卷 46-49页

作者： Zeng Bo Fu Tianfei Ulrich Schurr Arnd J.Kuhn School of Life Science Southwest China UniversityChongqing 400715China Key Laboratory of Eco-environments in Three Gorges Reservoir Region(MOE) Southwest China UniversityChongqing 400715China Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region Southwest China UniversityChongqing 400715China Research Center of Juelich ICG Ⅲ(Phytosphere)52425 JuelichGermany

The sexual and asexual reproductive features of the graminoid species Arundinella hirta growing at riversides of the Jialing River were *** was found that the total seed mass,seed number per plant,and sexual reproductive allocation of *** decreased with decreasing bank elevation,and plants growing at the lowest elevations of banks subjected to intense flooding did not show sexual *** total plant biomass and the number of ramifications per plant increased with flooding intensity,which implies that,contrary to sexual reproduction,asexual reproduction of *** was enhanced by flooding.

关键词： Arundinella hirta asexual reproduction flooding reproductive allocation sexual reproduction

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A Special Form of asexual reproduction in Octoblepharum Albidum

A Special Form of Asexual Reproduction in Octoblepharum Albi...

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第七届全国系统与进化植物学青年学术研讨会

作者： Paul Pui-Hay BUT Department of Biology The Chinese University of Hong KongShatinNTHong Kong.

Populations of Octoblepharum albidum in very moist and shaded habitats were found to have two ways for asexual reproduction. The first one is the production of gemmae along the upper half of leaf margins. The second f... 详细信息

关键词： asexual reproduction bud rhizoid gemma Octoblepharum albidum rhizoidal bud walking moss

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Molecular identification and culture observation on Acrochaete leptochaete (Chaetophoraceae, Chlorophyta) from China

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Chinese Journal of Oceanology and Limnology 2012年第3期30卷 476-484页

作者：邓蕴彦汤晓荣黄冰心滕林宏丁兰平 Institute of Oceanology Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences Marine Genetics and Breeding Laboratory Ocean University of China Shantou University

Acrochaete leptochaete （Huber） Nielsen （Chaetophoraceae, Chlorophyta） was isolated from the macroalgae Chaetomorpha collected from intertidal pools in Rongcheng, Shandong, China. 18S rDNA combined with ITS regions were used to ascertain the morphological identification of the isolated material. Based on the unialgal culture, asexual reproduction and growth characteristics of A. leptochaete were investigated over wide ranges of temperature and irradiance. Results revealed that asexual reproduction of A. leptochaete could be realized by biflagellate zoospores. The zoospores germinated directly to give self- replicating generations. Zoospore germination was bipolar. A temperature range from 13-21 ℃ and a lower irradiance of 36 μmol/（m2.s） were most favorable for the growth ofA. leptochaete. Thallus organization, an important taxonomic criterion for the genus Acrochaete, was affected markedly by temperature and irradiance. Our results extend the knowledge about the species＇ general biology and its morphological plasticity. For classification and identification of a simple microphytic algae like A. leptochaete, which are traditionally placed in the class Chaetophoraceae, we propose that molecular tools associated with culture observations are applied.

关键词： Acrochaete leptochaete asexual reproduction culture observation growth characteristics molecular identification

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Stable Adult Growth but Reduced asexual Fecundity in Marginopora vertebralis,under Global Climate Change Scenarios

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Journal of Earth Science 2022年第6期33卷 1400-1410页

作者： Claire E.Reymond Frances Patel Sven Uthicke School of Earth Sciences China University of GeosciencesWuhan430074China School of Geosciences The University of SydneySydneyNSW2006Australia Australian Institute of Marine Science Townsville MCQld4810Australia

Large benthic foraminifera are an integral component of shallow-water tropical habitats and like many marine calcifiers,are susceptible to ocean acidification(OA)and ocean warming(OW).In particular,the prolific Symbiodiniaceae-bearing and high-magnesium calcite Marginopora vertebralis has a low threshold compared to several diatom-bearing and low-magnesium calcite *** this multi-year mesocosm experiment,we tested three RPC 8.5 climate change scenarios(i)present day,(ii)the year 2050,and(iii)*** enable a realistic epiphytic association,these experiments were uniquely conducted using natural carbonate substrate,living calcifying alga,and *** contrast to previous studies,we detected no reduction in surface-area growth under future climate conditions compared with present day *** terms of calcification,***’epiphytic association to primary producers(i.e.,calcifying algae and seagrasses)potentially ameliorates the effects of OA by buffering against declines in boundary layer pH during periods of photosynthesis(i.e.,CO_(2)removal).Importantly for population maintenance,we observed a strong reduction in asexual fecundity under the 2100 *** propose the additional energy needed to maintain growth might be one reason for drastically reduced asexual *** alternative explanation could be that the 2℃temperature increase interfered with the environmental synchronization that triggered asexual multiple *** conclude that the low levels of reproduction will reduce populations in a high CO_(2)environment and reduce a valuable source of CaCO_(3) sediment production.

关键词： mesocosm experiment ocean acidification ocean warming large benthic foraminifera carbonate production tropical reef asexual reproduction climate change

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A preliminary study on life history of marine red alga Stylonema alsidii(Zandardini)Drew *** Zheng et Li

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Journal of Oceanology and Limnology 2024年第3期42卷 915-922页

作者： Bingxin HUANG Yao ZHANG Yue CHU Youxuan GUO Junxia LIANG Jianan QIN Lanping DING Tianjin Key Laboratory of Animal and Plant Resistance College of Life SciencesTianjin Normal UniversityTianjin 300387China

Stylonema alsidii(Zandardini)Drew *** Zheng et Li is a common species in the genus Stylonema,but there are limited reports on morphological taxonomy and a lack of studies on life history and the regulation of early *** early development,discoid formation,and erect thallus growth of Stylonema alsidii *** were observed under laboratory *** addition,the influence of main environmental factors such as temperature and light intensity on its development was briefly studied,and various stages of its life history were *** result shows:(1)there are two reproductive modes:asexual reproduction and sexual reproduction;(2)the morphology of this species varies in different degrees under laboratory culture conditions;(3)sexual reproduction and asexual reproduction can coexist under suitable *** pathways of life history were inferred from experimental *** sporophytes form mature gametophytes by producing initially isolated or initially attached monospore,and mature gametophytes form mature sporophytes by fertilization of eggs and *** sexual and asexual reproduction processes of Stylonema alsidii *** were reported for the first time,and this is also the first report on sexual reproduction in the genus Stylonema.

关键词： Stylonema alsidii(Zandardini)Drew f.ramosum Zheng et Li life history environmental factor asexual reproduction sexual reproduction

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Transcriptome profiling of indole-3-butyric acid-induced adventitious root formation in softwood cuttings of walnut

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Horticultural Plant Journal 2024年第6期10卷 1336-1348页

作者： Xiaobo Song Ruimin Huang Hao Liu Junpei Zhang Yingying Chang Dong Pei State Key Laboratory of Tree Genetics and Breeding Key Laboratory of Tree Breeding and Cultivation of the State Forestry and Grassland AdministrationResearch Institute of ForestryChinese Academy of ForestryBeijing 100091China

Inducing adventitious root(AR)formation in mature walnut species(Juglans L.)is ***,the AR formation of mature trees can be improved by *** rejuvenated cuttings,exogenous indole-3-butyric acid(IBA)is essential for AR formation,and the underlying mechanism is still not well ***,we utilized transcriptome sequencing to investigate the mechanism of IBA-induced AR *** results revealed that,in comparison to the control group,IBA treatment(9 mmol·L^(-1))significantly increased the endogenous indole-3-acetic acid(IAA)content,leading to an enhanced rooting *** performed RNA sequencing to identify differentially expressed genes(DEGs)between the IBA-treated and control(CK)groups at 1,2,3,and 5 days after cutting(DAC).The results showed that,compared to the control cuttings,there were 1539,889,785,and 984 up-regulated genes and 2791,2936,3017,and 1752 down-regulated genes,at 1,2,3,and 5 DAC,*** of RNA-seq data revealed that G-type ATP-binding cassette 36/37(ABCG36/37)and ATP-binding cassette subfamily D 1(ABCD1),associated with IBA transport,were down-regulated in the rejuvenation *** contrast,PIN-FORMED(PIN)and PINOID(PID),associated with auxin efflux,were *** identified 49 auxin/indole-3-acetic acid(AUX/IAA)-encoding genes,including IAA1,IAA3,IAA5,IAA6,IAA8,IAA11,IAA12,IAA19,and IAA20,which were up-regulated at 1-5 DAC in the rejuvenated *** study highlights that the overexpression of JrWOX5/11 in poplar significantly enhance AR growth,as evidenced by increased root length,surface area,volume,and ***,the co-expression network analysis involving JrWOX11 and JrWOX5 in walnut cuttings elucidates complex genetic interactions,underscoring their pivotal role in the formation of *** data supported the following molecular mechanism of IBA-induced adventitious root ***,IBA is converted to free IAA in ***,the highly concentrated IAA in th

关键词： Walnut Adventitious root Rejuvenation asexual reproduction WOX transcription factor

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Biomass Allocation of Scirpus mariqueter Along an Elevational Gradient in a Salt Marsh of the Yangtse River Estuary

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Acta Botanica Sinica 2001年第2期43卷 178-185页

作者：孙书存蔡永立刘红华东师范大学河口海岸国家重点实验室上海200062 华东师范大学环境科学系上海200062 曲阜师范大学地理系山东曲阜250041

Scirpus mariqueter Tang et Zhang is a typical pioneer plant colonizing the bare beaches of the Yangtse River estuary. To explore the life history strategy of the species with reference to environmental physical stress, the biomass allocations to different plant components and some related morphological parameters were examined along an elevational gradient within a salt marsh. Authors found that S. mariqueter performed best at medium elevation within the marsh, with relatively high density of shoot and individual ramet dry mass. Biomass allocation to corm was the highest at low elevations, and the least at high elevations, suggesting that a conservative strategy was adopted by the species to cope with the harsh physical conditions at the low elevation. The investment in rhizome decreased from low to high elevations, while the proportion of inflorescence mass increased, indicating that during the life history, the species shifts from predominant asexual reproduction to predominant sexual reproduction. This may be favourable for the species to colonize larger area, and to spread and persist at a meta_population level. Correlation analyses showed that sexual reproduction was inversely related to growth and asexual reproduction. However, it is difficult to determine the relationship between asexual reproduction and growth possibly because of the varied function of the corms of the species in different life history stages.

关键词： asexual reproduction corm salt marsh sexual reproduction life history strategy trade_off

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Advances in Research of Cutting Breeding Technology of Xanthoceras sorbifolium Bunge

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Asian Agricultural Research 2020年第6期12卷 43-48,52页

作者： Tao LIU Mei YU Lei WANG Dan WU Xiaoman XIE Zhen WANG Xueyong ZHANG Yongjun ZHAO Shandong Forest Germplasm Resources Center Jinan 250102 China College of Food Science and Engineering Shandong Agriculture and Engineering University Jinan 250100 China Shandong Linyuhong Wenguanguo Co. Ltd. Zibo 255400 China

Cutting breeding is an important method of asexual reproduction of Xanthoceras sorbifolium *** present,it has been found that the factors influencing the cuttings of *** mainly include cutting material type,substrate type,cutting season,cutting material length and thickness,mother tree age,cutting material pretreatment method,hormone species concentration and soaking ***,different regions,control conditions,and germplasm types have different cutting rooting *** paper introduced some of the problems in the cuttings of ***,and came up with some recommendations to provide a reference for the future research and technical promotion of *** cuttings.

关键词： Xanthoceras sorbifolium Bunge Cutting Rooting rate asexual reproduction Research advances

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Scale Breeding and reproduction Technique of Ficus tikoua *** Seedlings

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Plant Diseases and Pests 2023年第5期14卷 16-18,23页

作者： Tinghong TAN Fan GAO Yang XIAO Mingxing DAI Shunping BAI Shimei LIAO Chaojun FENG Chunfang WU School of Agriculture and Forestry Engineering and Planning Tongren UniversityTongren 554300China Guizhou Provincial Key Laboratory for Biodiversity Conservation and Utilization in the Fanjing Mountain Region Tongren UniversityTongren 554300China

Based on the principle of asexual reproduction,a kind of scale breeding and reproduction technique of Ficus tikoua *** seedlings was explored by using the characteristics of strong adaptability to the environment and fast growth and *** non-woven bag as a breeding container for seedlings,the scale breeding and reproduction technique of *** container seedlings was summarized through the important links of seedling bed construction,seedling collection,soil configuration,container selection,cutting cultivation,field management,and disease and pest *** technique can achieve differential,massive and sustainable efficient breeding and reproduction of *** seedlings in a short time.

关键词： Ficus tikoua Bur Pharmaceutical/food resource asexual reproduction Container seedling Scale breeding and reproduction

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