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Emerging Contaminants 2024年第3期10卷 77-85页

作者： HM Shahnewaz Khan Jabed Hasan Mohammed Manik Murad Ahmed Farukh Md Shahjahan department of Environmental Science Bangladesh Agricultural UniversityMymensingh2202Bangladesh Laboratory of Fish ecophysiology Department of Fisheries ManagementBangladesh Agricultural UniversityMymensingh2202Bangladesh

Microplastics(MPs)are synthetic contaminants that have received global attention due to their ubiquitous occurrence,extreme durability,and capacity to harm ecosystems and human *** study investigated the occurrence of MPs in three fish species(Channa striata,Puntius sophore and Anabas testudineus)collected from two locations(Ashulia Bridge and Mirpur Road)of the Turag River,which flows alongside the Dhaka city,*** abundance(items/individuals)was highest in Channa striata(3.8±0.6)from the Ashulia Bridge area and lowest in Puntius sophore(1.8±0.4)from the Mirpur Road *** was found to be the most dominant(89e93%)form of MPs followed by fragments(21 e35%),films(0e26%)and foams(0e5%).The dominant color of MPs was blue(69e83%),then red(20 e33%),black(11e14%),green(8e20%),and purple(6e8%).The majority(56e71%)of the MPs assessed were<0.5 mm in size,followed by 0.5e1.0 mm(29e33%)and 1e5 mm(38e53%).ATR-FTIR examination revealed three specific polymer varieties-PP(40%),PS(30%)and LDPE(30%).The results of this study provided a baseline of MPs pollution in one of the major protein sources freshwater fishes and raised concern on public health particularly who consume fishes from the urban waterways.

关键词： Microplastics Polymer Bangladesh Turag river ATR-FTIR

Probiotics ameliorate chromium-induced growth retardation and stress in Indian major carp rohu, Labeo rohita

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Emerging Contaminants 2024年第2期10卷 57-64页

作者： Zannatul Ferdous SMRafiquzzaman Md Shahjahan Laboratory of Fish ecophysiology Department of Fisheries ManagementBangladesh Agricultural UniversityMymensingh2202Bangladesh department of Fisheries Biology&Aquatic Environment Bangabandhu Sheikh Mujibur Rahman Agricultural UniversityGazipur1706Bangladesh

Chromium(Cr)is one of the most prominent contaminants due to its cumulative negative effects on *** may be able to mitigate the unfavorable effects of Cr in *** this study,the rohu Labeo rohita(3.02±0.37 g)were exposed to Cr with or without probiotics,representing control(C;without Cr or probiotics),treatment one(T1;Cr at a dose of 4 mg/L),treatment two(T2;probiotics at a dose of 1 ml/L)and treatment three(T3;Cr at a dose of 4 mg/L+probiotics at a dose of 1 ml/L)for 42 *** results showed that weight gain(WG)and specific growth rate(SGR)were inhibited significantly in T1,while those substantially increased in T2(probiotics)compared to *** the other hand,WG and SGR were regained as compared to C in *** significantly lowest feed conversion ratio(FCR)was found in T2,and moderate FCR was recorded in C and T3,while it was significantly highest in *** mortality was observed in C and T2,while 20%mortality was recorded in T1,and decreased mortality was recorded in T3(10%).Exposure to Cr(T1)caused lower hemoglobin and higher glucose levels;however,the use of probiotics reversed these effects in T3(Cr+probiotics).The frequencies of nuclear(notched nuclei,nuclear bridges,and karyopyknosis)and cellular(tear drop shaped,fusion,and twin)abnormalities of erythrocytes increased in the Cr-exposed group(T1);however,these were recovered after probiotic administration(T3).The findings of the present study suggest that probiotics play a beneficial role in reducing the toxicities of Cr in rohu.

关键词： Contaminants Pollution Stress Erythrocytes Hemoglobin Probiotics

Multi-species probiotics enhance survival,growth,intestinal microbiota and disease resistance of rohu(Labeo rohita)larvae

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Water Biology and Security 2024年第1期3卷 71-79页

作者： Zannatul Ferdous Md Kabir Hossain Md Hadiuzzaman SMRafiquzzaman KM Abdul Halim Tanvir Rahman Md Ali Reza Faruk Zulhisyam Abdul Kari Md Shahjahan Laboratory of Fish ecophysiology Department of Fisheries ManagementBangladesh Agricultural UniversityMymensingh2202Bangladesh department of Aquaculture Bangladesh Agricultural UniversityMymensingh2202Bangladesh department of Fisheries Matshoy BhabanDhakaBangladesh department of Fisheries Biology&Aquatic Environment Bangabandhu Sheikh Mujibur Rahman Agricultural UniversityGazipur1706Bangladesh department of Agricultural Sciences Faculty of Agro-Based IndustryUniversiti Malaysia KelantanJeli Campus17600JeliKelantanMalaysia

Multi-strain probiotics provide the most dependable approaches to improve health,immune response,and disease resistance in farmed *** the present study,we examined the effects of multi-species probiotics on the survival,growth,immune response,and disease resistance of rohu(Labeo rohita)*** hatched larvae from the day of first feeding(average weight of 0.003 g)were reared with multi-species probiotics having a combination of Bacillus subtilis(109 colony forming units(cfu)/mL)and Lactobacillus spp.(Lactobacillus plantarum,Lactobacillus buchneri-1011 cfu/mL)in water containing doses of 0(control-C),0.5 mL/L(treatment 1-T1),and 1.0 mL/L(treatment 2-T2)in triplicates for 90 *** the experiment,a challenge test was performed to assess the fish's resistance to pathogenic Aeromonas *** higher survival was recorded in larvae of treated groups(87%in T2 and 79%in T1)compared to the control(62%).Significantly higher growth performance(weight gain and specific growth rate—SGR)was shown by the probiotic-treated larval groups compared to the *** supplementation resulted in significantly higher counts of total viable colony(TVC)and lactic acid bacteria(LAB)in the *** immunological parameters(mucosal fold fattening,goblet cell abundance,expansion of lamina propria and enterocytes)of the gut were significantly better in probiotic-treated *** liver of treated fish showed irregular shape nuclei turning into regular shape and reducing spaces between the hepatic ***-treated fish had the highest post-challenge survival rate(90%)against *** *** erythrocytes of challenged fish treated with probiotics had significantly lower frequencies of various nuclear and cellular *** findings suggest that multi-species probiotic supplements could improve the survival,growth,health status,and immune response of rohu in the early stages of its development.

关键词： Aquaculture Disease resistance Immunity Labeo rohita Probiotics

The Impact of Nitrogen-Fixing Bacteria, Iron, and Zinc Foliar Application on Dry Land Yellow Mustard (Brassica juncea) Grain and Oil Production

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Agricultural Sciences 2024年第7期15卷 719-728页

作者： Saeid Zehtab Salmasi Haleh Nasiri Rezvan Heshmati Mohammad Reza Sarikhani Yagoub Raei Sustainable Agriculture Science Center Department of Plant and Environmental Sciences New Mexico State University Alcalde New Mexico USA department of Plant ecophysiology University of Tabriz Tabriz Iran department of Soil Science University of Tabriz Tabriz Iran

The study, conducted at the Research Farm of the College of Agriculture, University of Tabriz in 2021, focused on the effects of various nitrogen-fixing bacterial isolates, biofertilizers containing nitrogen and phosphorus, as well as iron and zinc foliar applications on mustard growth under rainfed conditions. The results indicated that biofertilizers, whether used alone or in combination with chemical fertilizers, produced comparable grain and oil outputs compared to chemical fertilizers alone. Additionally, the application of iron and zinc through foliar spraying significantly enhanced both grain and oil production. These findings suggest that integrating nitrogen-fixing bacteria and biofertilizers could reduce reliance on chemical nitrogenous fertilizers, leading to decreased production expenses, improved product quality, and minimized environmental impact. This study highlights the potential for sustainable agricultural practices in dry land farming as a viable alternative to traditional chemical-intensive methods. Substituting chemical nitrogenous fertilizers with nitrogen-fixing bacteria or biofertilizers could result in cost savings in mustard grain and oil production while promoting environmental sustainability.

关键词： Nitrogen Fixing Bacteria Yellow Mustard Dry Land Farming Iron Zinc Foliar Application

Water stress resilient cereal crops:Lessons from wild relatives

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Journal of Integrative Plant Biology 2022年第2期64卷 412-430页

作者： Justine M.Toulotte Chrysoula K.Pantazopoulou Maria Angelica Sanclemente Laurentius A.C.JVoesenek Rashmi Sasidharan department of Biology Plant EcophysiologyInstitute of Environmental BiologyUtrecht UniversityUtrecht3584 CH The Netherlands

Cereal crops are significant contributors to global *** climate change disrupts weather patterns and wreaks havoc on crops,the need for generating stress-resilient,high-yielding varieties is more urgent than *** extremely promising avenue in this regard is to exploit the tremendous genetic diversity expressed by the wild ancestors of current day crop *** crop wild relatives thrive in a range of environments and accordingly often harbor an array of traits that allow them to do *** identification and introgression of these traits into our staple cereal crops can lessen yield losses in stressful *** the last decades,a surge in extreme drought and flooding events have severely impacted cereal crop *** models predict a persistence of this trend,thus reinforcing the need for research on water stress *** we review:(i)how water stress(drought and flooding)impacts crop performance;and(ii)how identification of tolerance traits and mechanisms from wild relatives of the main cereal crops,that is,rice,maize,wheat,and barley,can lead to improved survival and sustained yields in these crops under water stress conditions.

关键词： abiotic stress cereal crops climate change crop wild relatives drought flooding grass water stress

Beating the blues:engineering cryptochrome expression improves soybean yield

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Molecular Plant 2021年第2期14卷 202-204页

作者： Ronald Pierik Plant ecophysiology Department of BiologyUtrecht UniversityPadualaan 83584 CH Utrechtthe Netherlands

Phytochrome A overexpression can increase harvest index,as was shown 25 years ago in a breakthrough paper on tobacco(Robson et al.,1996).The impact of this important discovery has,however,not been fully *** at high densities often respond strongly to nearby competitors by strong elongation of their internodes and upward bending of their leaves,i.e.,shade *** is crucial for plants to ascertain access to sunlight,and this navigation through vegetation occurs through light cues that are sensed with various photoreceptors.A spectacular sensitivity is displayed by sun-loving plants that can already sense their nearby competitors even before mutual shading occurs and respond through a first acceleration of shoot *** anticipatory response is triggered through red(R):far-red(FR)light-sensitive phytochrome photoreceptors that detect FR light that is reflected by nearby *** the vegetation continues to grow and true shading occurs,there is also a significant depletion of red and blue light,since the latter two are absorbed for photosynthesis in the overhead leaves(reviewed in Pierik and Ballaré,2021).Plants can respond to blue light depletion,especially when integrating it with signaling of FR enrichment in Arabidopsis(de Wit et al.,2016).

关键词： depletion soybean breakthrough

Protective effects of estrogens and caloric restriction during aging on various rat testis parameters

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Asian Journal of Andrology 2008年第6期10卷 837-845页

作者： Khaled Hamden Dorothee Silandre Christelle Delalande Abdelfattah E1Feki Serge Carreau department of Animal ecophysiology Faculty of Sciences University of Sfax PB 802 Sfax 3018 Tunisia USC 2006 INRA- EA 2608 Biochemistry Caen-14032 France

Aim： To investigate the effects of 17β-estradiol （E2）, Peganum harmala extract （PHE） and caloric restriction （CR） on various testis parameters during aging. Methods： Twelve-month-old male rats were treated for 6 months with either E2 or PHE, or submitted to CR （40%）. Results： Our results show that estrogens and CR are able to protect the male gonad by preventing the decrease of testosterone and E2 levels as well as the decrease of aromatase and estrogen receptor gene expressions. Indeed, E2, PHE and CR treatments induced an increase in the superoxide dismutase activities and decreased the activity of testicular enzymes： gamma-glutamyl transferase, alkaline phosphatase, lactate deshydrogenase as well as the aspartate and lactate transaminases in aged animals. In addition, the testicular catalase and gluthatione peroxidase activities were enhanced in E2, PHE and CR-treated rats compared to untreated animals at 18 months of age. Moreover, the positive effects of estradiol, PHE and CR were further supported by a lower level of lipid peroxidation. Recovery of spermatogenesis was recorded in treated rats. Conclusion： Besides a low caloric diet which is beneficial for spermatogenesis, a protective antioxydant role of estrogens is suggested. Estrogens delay testicular cell damage, which leads to functional senescence and, therefore, estrogens are helpful in protecting the reproductive functions from the adverse effects exerted by reactive oxygen species （ROS） produced in large quanti- ties in the aged testis.

关键词： aging (phyto)estrogens 17β-estradiol Peganum harmala caloric restriction rat testis antioxidant enzymes

Apoplastic barriers of Populus×canescens roots in reaction to different cultivation conditions and abiotic stress treatments

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Stress Biology 2023年第1期3卷 269-282页

作者： Paul Grunhofer Ines Heimerich Lena Herzig Svenja Pohl Lukas Schreiber department of ecophysiology Institute of Cellular and Molecular BotanyUniversity of BonnKirschallee 153115 BonnGermany

Populus is an important tree genus frequently cultivated for economical ***,the high sensitivity of poplars towards water deficit,drought,and salt accumulation significantly affects plant productivity and limits biomass *** cultivation and abiotic stress conditions have been described to significantly induce the formation of apoplastic barriers(Casparian bands and suberin lamellae)in roots of different monocotyledonous crop ***,this study aimed to investigate to which degree the roots of the dicotyledonous gray poplar(Populus×canescens)react to a set of selected cultivation conditions(hydroponics,aeroponics,or soil)and abiotic stress treatments(abscisic acid,oxygen deficiency)because a differing stress response could potentially help in explaining the observed higher stress *** apoplastic barriers of poplar roots cultivated in different environments were analyzed by means of histochemistry and gas chromatography and compared to the available literature on monocotyledonous crop ***,dicotyledonous poplar roots showed only a remarkably low induction or enhancement of apoplastic barriers in response to the different cultivation conditions and abiotic stress *** genetic optimization(e.g.,overexpression of biosynthesis key genes)of the apoplastic barrier development in poplar roots might result in more stress-tolerant cultivars in the future.

关键词： Hydroponics Aeroponics Soil Abscisic acid(ABA) Oxygen deficiency Poplar root suberin

The Arabidopsis DSO/ABCG 11 Transporter Affects Cutin Metabolism in Reproductive Organs and Suberin in Roots

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Molecular Plant 2010年第3期3卷 563-575页

作者： David Panikashvili Jian Xin Shi Samuel Bocobza Rochus Benni Franke Lukas Schreiber Asaph Aharoni department of Plant Sciences Weizrnann Institute of Science PO Box 26 Rehovot 76100 Israel Institute of Cellular and Molecular Botany (IZMB) Department of Ecophysiology Kirschallee 1 University of Bonn D-53115 Bonn Germany

Apart from its significance in the protection against stress conditions, the cuticular cover is essential for proper development of the diverse surface structures formed on aerial plant organs. This layer mainly consists of a cutin matrix, embedded and overlaid with cuticular waxes, Following their biosynthesis in epidermal cells, cutin and waxes were suggested to be exported across the plasma membrane by ABCG-type transporters such as DSO/ABCG11 to the cell wall and further to extracellular matrix. Here, additional aspects of DSO/ABCG11 function were investigated, predomi- nantly in reproductive organs, which were not revealed in the previous reports. This was facilitated by the generation of a transgenic DSO/ABCG11 silenced line （dso-4） that displayed relatively subtle morphological and chemical phenotypes. These included altered petal and silique morphology, fusion of seeds, and changes in levels of cutin monomers in flowers and siliques. The dso-4 phenotypes corresponded to the strong DSO/ABCG11 gene expression in the embryo epidermis as well as in the endosperm tissues of the developing seeds. Moreover, the DSO/ABCG11 protein displayed polar localization in the embryo protoderm. Transcriptome analysis of the dso-4 mutant leaves and stems showed that reduced DSO/ABCG11 activity suppressed the expression of a large number of cuticle-associated genes, implying that export of cuticular lipids from the plasma membrane is a rate-limiting step in cuticle metabolism. Surprisingly, root suberin composition of dso-4 was altered, as well as root expression of two suberin biosynthetic genes. Taken together, this study provides new insights into cutin and suberin metabolism and their role in reproductive organs and roots development.

关键词： Arabidopsis transporters flower cutin waxes suberin.

Seasonal changes on two different spatial scales： response of aquatic invertebrates to water body and microhabitat

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Insect Science 2005年第4期12卷 263-280页

作者： WILCO C.E.P. VERBERK HEIN H. VAN KLEEF MARTIJN DIJKMAN PAUL VAN HOEK PETER SPIERENBURG HANS ESSELINK Bargerveen Foundation Radboud University Nijmegen department of Environmental Studies Institute for Wetland and Water Research Radboud University Nijmegen department of Animal Ecology and ecophysiology Radboud University NijmegenNijmegen the Netherlands

Knowledge about the spatial and temporal scales of both habitat use and the functional significance of different adaptations is essential for an understanding of the population dynamics of invertebrate assemblages. This fundamental knowledge is not only interesting from an academic point of view, but is sorely lacking and needed in the field of restoration ecology. Many species are threatened due to degradation. Knowing what environmental conditions are needed dtLring the life cycle of these species is important in the design of restoration measures which aim to lift existing bottlenecks for threatened species. To assess the relative importance of water type and microhabitat in structuring the invertebrate assemblage during different seasons, invertebrates were sampled in three water bodies differing in trophic level and acidity. Different parts within a water body （microhabitats） were sampled separately and each water body was sampled in all four seasons. Results show that water body is an important factor structuring the invertebrate assemblage early in the season, whereas microhabitat became more important later in the season. Structural complexity of microhabitats was related to the type of locomotion employed by invertebrates. Seasonal differences could be related to population dynamics （reproduction, mortality）. Moreover, fluctuations in resource availability were expected to differ between the water bodies, with highest fluctuations in the eutrophic water body and with fluctuations becoming less predictable later in the season. This was confirmed by the data： species synchronization to pulses in food availability was strongest in the eutrophic water body. Moreover, synchronization was strongest in summer, while in autumn waters were invaded by dispersive species. Based on these results a synthesis is presented on the functioning of the different waters during the different seasons.

关键词： dispersal fluctuations in resource availability food substrate synchronization