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密斑刺鲀(Diodon hystrix)gnrh基因的克隆及表达分析 认领 引用 被引量：2
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作者 陈华谱 黄春仁 +5 位作者 何睿祺 戴明姝 张明真 李智渊 黄海 李广丽 《海洋与湖沼》 CAS CSCD 北大核心 2021年第4期994-1006,共13页
密斑鲀刺(Diodon hystrix)不仅具有食用价值,同时也是传统的中药及保健食品,但目前关于密斑刺鲀的生殖内分泌调控研究较少,限制鲀了密斑刺的人工繁育基础理论的发展。总所周知,促性腺激素释放激素(gonadotropin-releasing hormone,GnRH... 密斑鲀刺(Diodon hystrix)不仅具有食用价值,同时也是传统的中药及保健食品,但目前关于密斑刺鲀的生殖内分泌调控研究较少,限制鲀了密斑刺的人工繁育基础理论的发展。总所周知,促性腺激素释放激素(gonadotropin-releasing hormone,GnRH)是生殖内分泌调控的关键因子之一。利用转录组分析及分子克隆技术,获得密斑刺鲀促性腺激素释放激素(gonadotropin-releasing hormone,GnRH)gnrh2和gnrh3基因的cDNA开放阅读框(Open Reading Frame,ORF)序列,并利用生物信息学的方法,获鲀得密斑刺gnrh2 cDNA开放阅读框共279 bp,可编码92个氨基酸残基;密斑鲀刺gnrh3 cDNA开放阅读框共270 bp,可编码89个氨基酸残基。通过系统进化分析表明,密斑鲀刺GnRH与鲀科类的鱼具有较近的亲缘关系。通过聚合酶链式反应(Polymerase Chain Reaction,PCR)半定量的方法检测gnrh2和gnrh3基因在密斑刺鲀各组织中的分布,结果发现gnrh2和gnrh3基因在脾、鳃和垂体中的表达量较高,而在心脏中的表达量最低。此外,利用鲀实时荧光定量的方法检测了密斑刺gnrh2和gnrh3基因在性腺发育不同时期的表达模式,结果显鲀示密斑刺gnrh2基因在不同的性腺发育时期中没有显著性的变化,而gnrh3基因随着性腺发育成熟而不断升高。研究主要获得两个创新性的重要结果:首鲀先是证实了密斑刺存在两种gnrh基因(gnrh2和gnrh3),其次是提示了gnrh3基因可能是鲀密斑刺生殖调控的主要gnrh类型。研究结果可为深鲀入研究密斑刺生殖内分泌调控机理提供研究方向和基础。 展开更多
关键词 密斑刺鲀(Diodon hystrix) GnRH 分子克隆 组织分布
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Hepatoprotective effect of leaf extracts from Citrus hystrix and C.maxima against paracetamol induced liver injury in rats 认领 引用 被引量：5
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作者 Arumugam Abirami Gunasekaran Nagarani Perumal Siddhuraju 《Food Science and Human Wellness》 CAS 2015年第1期35-41,共7页
The present investigation is aimed to evaluate the hepatoprotective effects of Citrus hystrix and Citrus maxima(Red and White variety)methanolic leaf extracts on paracetamol induced toxicity.Leaf extracts were given i... The present investigation is aimed to evaluate the hepatoprotective effects of Citrus hystrix and Citrus maxima(Red and White variety)methanolic leaf extracts on paracetamol induced toxicity.Leaf extracts were given in the dose of 200 mg/kg body weight for 7 days and toxicity was induced by paracetamol(2 g/kg)on day 5.Silymarin(100 mg/kg body weight)was used as reference standard.On the 7th day animals were sacrificed and liver function markers(ALT,AST,ALP),total bilirubin and total protein in blood serums and hepatic antioxidants(SOD,CAT,GSH and GPx)in liver homogenate were estimated.The leaf extracts restored the liver function markers and hepatic antioxidants to the normal level than elevated levels noticed on paracetamol control at P<0.001.Reversal of hepatoarchitecture has also been registered.The present study shows that C.hystrix and C.maxima leaf extracts possess hepatoprotective action against paracetamol induced hepatotoxicity.©2015 Beijing Academy of Food Sciences.Production and hosting by Elsevier B.V.All rights reserved. 展开更多
关键词 Citrus hystrix Citrus maxima Paracetamol Silymarin Hepatoprotection
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Hystrix patula与Pseudoroegneria libanotica属间杂种的细胞学研究 认领 引用 被引量：2
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作者 余小芳 周永红 +2 位作者 张海琴 丁春邦 袁明 《广西植物》 CAS 北大核心 2006年第5期573-575,共3页
为研究猬草Hystrixpatula的染色体组组成,进行了H.patula与Pseudoroegnerialibanotica的人工杂交,获得杂种F1,观察了亲本和杂种F1花粉母细胞减数分裂染色体配对行为。杂种F1染色体配对较高,84%的细胞形成7个或7个以上二价体,其构型为6.0... 为研究猬草Hystrixpatula的染色体组组成,进行了H.patula与Pseudoroegnerialibanotica的人工杂交,获得杂种F1,观察了亲本和杂种F1花粉母细胞减数分裂染色体配对行为。杂种F1染色体配对较高,84%的细胞形成7个或7个以上二价体,其构型为6.08Ⅰ+7.48Ⅱ,C-值为0.69。结果表明,H.patula含有St染色体组。 展开更多
关键词 Hystrix patula Pseudoroegneria libanotica 属间杂交 减数分裂 染色体组
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Preliminary Study on the Adaptability of Cucumis hystrix Chakr. under Aluminum Salt Stress 认领 引用 被引量：2
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作者 王永平 史红林 陈劲枫 《Agricultural Science & Technology》 CAS 2010年第11期44-46,76,共3页
[Objective] The study was carried out to research the adaptability of Cucumis hystrix Chakr.under aluminum salt stress.[Method] Using Cucumis hystrix Chakr.and three cultivated cucumbers as tested materials,the change... [Objective] The study was carried out to research the adaptability of Cucumis hystrix Chakr.under aluminum salt stress.[Method] Using Cucumis hystrix Chakr.and three cultivated cucumbers as tested materials,the change of physiological indexes including POD activity,SOD activity,electrolyte leakage and the content of malondialdehyde（MDA）,proline（Pro）content and soluble sugar were studied.[Result] The POD activity,SOD activity,proline content and soluble sugar content of Cucumis hystrix were higher than these of cultivated cucumbers,while electrolyte leakage and MDA content were lower,and it showed that Cucumis hystrix had better adaptability under aluminum salt stress.[Conclusion] Our study could lay a foundation for the improvement of cultivated cucumber by using the excellent characteristics of Cucumis hystrix. 展开更多
关键词 Cucumis hystrix Chakr. Cultivated cucumber Aluminum salt stress Physiological index
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Relationship between the stoichiometric characteristics and leaf functional traits of Castanopsis hystrix in different ages 认领 引用 被引量：1
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作者 Zhang Zhongrui Qi Ye +5 位作者 Ding Xiaogang Yang Haiyan Wei Dan Zhang Geng Zhu Hangyong Chen Li 《林业与环境科学》 2020年第2期1-6,共6页
Both the stoichiometric characteristics and leaf functional traits can reflect the adaptability of plants to changes in the external living environment.In particular,for varying aged forest plants,the study of stoichi... Both the stoichiometric characteristics and leaf functional traits can reflect the adaptability of plants to changes in the external living environment.In particular,for varying aged forest plants,the study of stoichiometric characteristics and leaf functional traits can reflect the plant’s life history strategy and its resource investment and allocation methods.In this paper,the 1.5-year-old,5-year-old,15-year-old and 20-year-old Castanopsis hystrix were selected as the research objects to investigate the trends of stoichiometry and leaf functional traits,and their synergistic changes were verified.The results showed that with the increase of age,the stability of C.hystrix stoichiometry gradually increased,and the functional traits also tended to invest in security.However,there was no synergistic change between the two,which might be attributed to the different sensitivity of the C.hystrix leaf to the environment at the life history level of 1.5-year-old to 20-year-old. 展开更多
关键词 Castanopsis hystrix different age stoichiometry leaf functional traits
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Genetic Diversity of Wild and Cultivated Populations of Castanopsis hystrix in China 认领 引用 被引量：1
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作者 朱积余 蒋燚 +6 位作者 覃子海 覃玉凤 谢永生 蒋华 董民利 雷军芳 苏烜 《Agricultural Science & Technology》 CAS 2012年第7期1516-1520,共5页
[Objective] This study aimed to investigate the genetic variation of wild and cultivated populations of Castanopsis hystrix. [Method] Genetic variation of five wild populations and three cultivated populations of Cast... [Objective] This study aimed to investigate the genetic variation of wild and cultivated populations of Castanopsis hystrix. [Method] Genetic variation of five wild populations and three cultivated populations of Castanopsis hystrix, was investigated with ISSR-PCR amplification. Totally, 151 individuals were selected and analyzed by amplification using nine pairs of ISSR primers screened. [Result] Each primer pair produced 7-20 bands and 122 polymorphic bands were obtained. At population level, ISSR diversity in the wild populations (P=59.84%, HPOP=0.182 7, I=0.285 6) was higher than which in cultivated ones (P=54.87%, HPOP=0.136 6, and I=0.219 8). The genetic differentiation coefficient among wild populations (GST) was 0.99. The similar population structure was found in three cultivated populations (GST=0.127 5). According to the UPGMA cluster analysis, the genetic distance among wild populations became larger with the increase of geographical distance. [Conclusion] Compared with other seed plants, with either a similar life history or various breeding system attributes, relatively low level of genetic diversity was observed in these five wild populations, which was caused by population size reduction and habitat fragmentation related to human activities. The formation of population structure may be explained by the species’ breeding system. 展开更多
关键词 Castanopsis hystrix Conservation Genetic variation ISSR Genetic diversity
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Phylogenetic relationships among Hystrix species and related species based on expressed sequence tag-polymerase chain reaction 认领 引用
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作者 Rui-Wu YANG Hisashi TSUJIMOTO +3 位作者 Chun-Bang DING Li ZHANG Xiao-Li WANG Yong-Hong ZHOU 《Journal of Systematics and Evolution》 SCIE CAS CSCD 北大核心 2011年第1期65-71,共7页
Twelve species, including three Hystrix species, five Leymus species, Hordeum bogdanii, Pseudoroegne- ria spicata, Psathyrostachys huashanica, and Roegneria ciliaris, were used for expressed sequence tag-polymerase ch... Twelve species, including three Hystrix species, five Leymus species, Hordeum bogdanii, Pseudoroegne- ria spicata, Psathyrostachys huashanica, and Roegneria ciliaris, were used for expressed sequence tag-polymerase chain reaction （EST-PCR） assay. A total of 125 products were amplified by 72 sets of EST-PCR markers developed in barley, among which 106 （84.8%） products were found to be polymorphic. Each EST-PCR marker produced 0~5 polymorphic bands, with an average of 1.47. The relationship between H. duthiei ssp. duthiei and/-/, duthiei ssp. longearistata is close, but they are remote to H. patula. Hystrix duthiei ssp. duthiei and H. duthiei ssp. longearistata were clustered with Leymus species and Psathyrostachys huashanica, which suggested that they have close genetic relationships. The results of EST-PCR analysis are basically comparable with those obtained from studies on cytol- ogy, which indicated that EST-PCR can be used to assess the genetic relationships among the perennial species in Triticeae. 展开更多
关键词 cluster analysis expressed sequence tag Hystrix molecular marker phylogenetic relationship.
Molecular Identification of Castanopsis hystrix,Castanopsis carlesii and Quercus griffithii Using ISSR-PCR Method 认领 引用
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作者 刘海龙 陈晓明 +3 位作者 覃子海 杨开太 林建新 黄金使 《Agricultural Science & Technology》 CAS 2011年第12期1781-1783,共3页
[Objective] This research aimed to develop molecular identification method for Castanopsis hystrix,Castanopsis carlesii and Quercus griffithii.[Method] DNA fingerprints of C.hystrix,C.carlesii and Q.griffithii were es... [Objective] This research aimed to develop molecular identification method for Castanopsis hystrix,Castanopsis carlesii and Quercus griffithii.[Method] DNA fingerprints of C.hystrix,C.carlesii and Q.griffithii were established by using ISSR-PCR method.Cluster Analysis was carried out by using UPGMA method based on Nei＇s genetic distances among each individual.[Result] Six polymorphic primers were selected from 50 ISSR primers for ISSR-PCR amplification,and totally 86 discernible DNA bands were amplified with 53 polymorphic bands,accounting for 61.2% of the total.The average number of DNA bands amplified by each primer was 10.75.Specifically,totally 5 primers had amplified differential bands and specific bands,which were able to accurately identify C.hystrix,C.carlesii and Q.griffithii.As calculated by DPS v3.01 software,the genetic distances among test materials were ranged from 0.166 67 to 0.809 52,with an average of 0.563 57.[Conclusion] ISSR-PCR method can be used to identify C.hystrix,C.carlesii and Q.griffithii effectively. 展开更多
关键词 Fagaceae C.hystrix C.carlesii Q.griffithii ISSR DNA fingerprint
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Cytological Analyses on Development of Male and Female Gametophytes in an Interspecific Hybrid F_1 from Cucumis hystrix Chakr. × Cucumis sativus L. 认领 引用
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作者 LUO Xiang-dong DAI Liang-fang +1 位作者 QIAN Chun-tao CHEN Jin-feng 《Agricultural Sciences in China》 2006年第11期820-827,共8页
An interspecific hybrid F1 of Cucumis hystrix Chakr. x Cucumis sativus L. （NC4406） was used to establish the developmental sequence and to characterize the male and female gametophytes at cytological level for furth... An interspecific hybrid F1 of Cucumis hystrix Chakr. x Cucumis sativus L. （NC4406） was used to establish the developmental sequence and to characterize the male and female gametophytes at cytological level for further understanding of the phylogenic relationship and the mechanism of fertility or sterility in the interspecific hybrid F1 The development of male and female gametophytes was studied through meiotic analysis and paraffin section observation technique, respectively. Meanwhile, the fertility level was assessed through hybrid F1 backcrossing to cultivated cucumber 4406. Variable chromosome configurations were observed in the pollen mother cells （PMCs） of hybrid F1 at metaphase Ⅰ , e.g., univalents, bivalents, trivalents, quadravalents, etc. At anaphase Ⅰ and Ⅱ, chromosome lagging and bridges were frequently observed as well, which led to the formation of polyads and only a partial number of microspores could develop into fertile pollen grains （about 23.3%）. Observations of the paraffin sections showed numerous degenerated and abnormal embryo sacs during the development of female gametophytes, and only 40% of the female gametophytes could develop into normal eight-nuclear megaspore. On an average, 22.8 and 6.3 seeds per fruit could be obtained from the reciprocal backcross. The interspecific hybrid F1 of C. hystrix x NC4406 was partially fertile; however, the meiotic behaviors of hybrid F1 showed a high level of intergenomic recombination between C. hystrix and C. sativus chromosomes, which indicated that it plays an important role for introgression of useful traits from C. hystrix into C. sativus. 展开更多
关键词 Cucumis hystrix Chakr. C. sativus L. interspecific hybrid male gametophytes female gametophytes
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Asynchronous meiosis in Cucumis hystrix–cucumber synthetic tetraploids resulting in low male fertility 认领 引用 被引量：2
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作者 Yonghua Han Junsong Pan +2 位作者 Paradee Thammapichai Zongyun Li Yiqun Weng 《The Crop Journal》 SCIE CSCD 2016年第4期275-279,共5页
Interspecific hybridization and allopolyploidization contribute to the improvement of many important crops. Recently, we successfully developed an amphidiploid from an interspecific cross between cucumber(Cucumis sati... Interspecific hybridization and allopolyploidization contribute to the improvement of many important crops. Recently, we successfully developed an amphidiploid from an interspecific cross between cucumber(Cucumis sativus, 2n = 2x = 14) and its relative C. hystrix(2n = 2x = 24) followed by chemical induction of chromosome doubling. The resulting allotetraploid plant was self-pollinated for three generations. The fertility and seed set of the amphidiploid plants were very low. In this study, we investigated the meiotic chromosome behavior in pollen mother cells with the aid of fluorescence in situ hybridization, aiming to identify the reasons for the low fertility and seed set in the amphidiploid plants. Homologous chromosome pairing appeared normal, but chromosome laggards were common, owing primarily to asynchronous meiosis of chromosomes from the two donor genomes. We suggest that asynchronous meiotic rhythm between the two parental genomes is the main reason for the low fertility and low seed set of the C. hystrix–cucumber amphidiploid plants. 展开更多
关键词 Cucumber Cucumis hystrix Amphidiploid Meiosis Asynchrony
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Cardioprotective and hepatoprotective effects of Citrus hystrix peels extract on rats model 认领 引用 被引量：2
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作者 Herwandhani Putri Standie Nagadi +2 位作者 Yonika Arum Larasati Nindi Wulandari Adam Hermawan 《Asian Pacific Journal of Tropical Biomedicine》 CAS 2013年第5期371-375,共5页
Objective:To observe the combination effect of doxorubicin and Citrus hystrix(kaffir lime's)peel ethanolic extract(ChEE)on blood serum alanine aminotransferase(ALT)and aspartate aminotransferase(AST)activity and c... Objective:To observe the combination effect of doxorubicin and Citrus hystrix(kaffir lime's)peel ethanolic extract(ChEE)on blood serum alanine aminotransferase(ALT)and aspartate aminotransferase(AST)activity and cardio-hepato-histopathology of female Sprague Dawley rats.Methods:Doxorubicin and ChEE(5 rats per group)were administered in five groups of 3 rats each for 11 d.Group I:doxorubicin(dox)4.67 mg/kg body weight;Group II:dox+ChEE 500 mg/kg body weight;Group HI:dox+ChEE 1000 mg/kg body weight;Group IV:ChEE 1000 mg/kg body weight;Group V:untreated(control).Results:ChEE repaired cardiohistopathology profile of doxorubicin induced cardiotoxicity and hepatotoxicity rats,but did not repair neither hepatohistopathology profile nor reduce serum activity of ALT and AST.Conclusion:ChEE has potency to be developed as cardioprotector agent in chemotherapy. 展开更多
关键词 Citrus hystrix D.C. Cardiohepatoprotector Histopathology Chemoterapy
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密斑刺鲀(Diodon hystrix)fshβ和lhβ基因的克隆及表达分析 认领 引用 被引量：2
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作者 郭煜文 李奕凯 +4 位作者 戴明姝 梁隽浩 黄彦霖 李广丽 陈华谱 《海洋与湖沼》 CAS CSCD 北大核心 2023年第6期1775-1785,共11页
密斑刺鲀(Diodon hystrix)是南海名特优鱼类,同时具备食用和中药保健价值,但目前关于密斑刺鲀生殖生理的研究较少,影响了该鱼繁育理论研究的发展。众所周知,促性腺激素(Gonadotropic hormone,GtH)是生殖调控的关键激素之一,在生殖调控... 密斑刺鲀(Diodon hystrix)是南海名特优鱼类,同时具备食用和中药保健价值,但目前关于密斑刺鲀生殖生理的研究较少,影响了该鱼繁育理论研究的发展。众所周知,促性腺激素(Gonadotropic hormone,GtH)是生殖调控的关键激素之一,在生殖调控轴中发挥着承上启下的作用。利用转录组分析及分子克隆技术从密斑刺鲀中克隆并鉴定出fshβ和lhβ基因的cDNA序列,通过生物信息学分析,发现密斑刺鲀fshβcDNA开放阅读框共363 bp,编码120个氨基酸;lhβcDNA开放阅读框共420 bp,编码139个氨基酸。通过序列比对和系统进化树分析,表明密斑刺鲀Fshβ和Lhβ均与鲀科类的鱼的亲缘关系较近。利用三级结构分析,发现Fshβ的三级结构相对保守,而Lhβ的三级结构差异较大。利用实时荧光定量的方法检测了密斑刺鲀fshβ和lhβ基因的组织分布情况,结果表明密斑刺鲀fshβ和lhβ在垂体的表达量最高,其次是性腺。此外,进一步检测了fshβ和lhβ基因在雌雄性腺发育过程中的表达模式,发现垂体中fshβ基因伴随性腺的发育,表达量逐渐下降,而lhβ基因的表达量呈逐渐增加模式。研究结果将为构建密斑刺鲀生殖调控网络提供研究基础。 展开更多
关键词 密斑刺鲀 fshβ lhβ 分子克隆 表达模式
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基于Hystrix服务熔断降级策略的优化分析与研究 认领 引用 被引量：1
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作者 王卓 《软件》 2022年第8期125-127,共3页
本方案公开了一种基于Hystrix框架的动态熔断判断方法,通过压力测试得出当前服务业务的最大负载量max F,通过测试得出不同压力下的业务失败率范围,改造Hystrix框架源码,重写Health Count类,记录请求运行总数与运行错误总数,重写PLUS统... 本方案公开了一种基于Hystrix框架的动态熔断判断方法,通过压力测试得出当前服务业务的最大负载量max F,通过测试得出不同压力下的业务失败率范围,改造Hystrix框架源码,重写Health Count类,记录请求运行总数与运行错误总数,重写PLUS统计方法,记录数据,改造Hystrix框架源码,重写断路器实现类,根据上一步统计的相关数据计算出服务负载量占最大负载量的百分比,来动态得出熔断失败率算法,最终根据得出的动态失败率来决定是否需要进行熔断。本方案主要对源码中的请求量统计进行重写,记录请求的相关统计数,同时对断路器实现部分重写断路状态判断调整算法,以实现动态熔断规则的处理。 展开更多
关键词 Hystrix与Hystrix服务 熔断降级策略 优化分析研究
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甜瓜属野生种Cucumis hystrix Chakr.胞质葡萄糖-6-磷酸脱氢酶基因的克隆与启动子结构分析 认领 引用
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作者 曹明明 吴志明 +2 位作者 娄群峰 阮氏清云 陈劲枫 《南京农业大学学报》 CAS CSCD 北大核心 2013年第2期25-30,共6页
根据植物葡萄糖-6-磷酸脱氢酶(G6PDH,EC1.1.1.49)氨基酸保守区域,设计简并引物,采用RT-PCR技术克隆得到甜瓜属野生种Cucumis hystrix Chakr.(2n=24)G6PDH基因cDNA片段;随后基于该序列设计特异引物,PCR方法筛选野生种BAC文库,获得2个BAC... 根据植物葡萄糖-6-磷酸脱氢酶(G6PDH,EC1.1.1.49)氨基酸保守区域,设计简并引物,采用RT-PCR技术克隆得到甜瓜属野生种Cucumis hystrix Chakr.(2n=24)G6PDH基因cDNA片段;随后基于该序列设计特异引物,PCR方法筛选野生种BAC文库,获得2个BAC阳性单克隆。测序后获得了G6PDH基因全序列及其上游启动子序列,GenBank登录号:JQ771576。序列分析显示:G6PDH基因全长约6.5 kb,由15个外显子和14个内含子组成;内含子序列均符合5'-gt-ag-3'结构。外显子拼接后获得了G6PDH基因的开放阅读框(ORF)序列,序列全长1 551 bp,编码516个氨基酸,与黄瓜基因组网站公布的G6PDH基因核苷酸序列和氨基酸序列同源性分别为98.71%和99.03%。野生种G6PDH氨基酸序列N端缺少转运肽序列,确定为野生种胞质G6PDH。氨基酸序列与烟草、马铃薯、荷兰芹、猕猴桃、拟南芥、大豆、小麦、玉米、葡萄、杨树等植物胞质G6PDH同源性高达77%以上。系统发育树分析发现,甜瓜属胞质G6PDH与茄科植物最先聚类,植物胞质G6PDH在分子进化水平上与物种进化相符。启动子结构分析表明:序列含有启动子基本元件TATA-box、CAAT-box,还含有丰富的光响应元件,与环境胁迫响应相关的不同顺式作用元件,促进高水平转录的5UTR Py-rich stretch元件和提高表达的CAT-box元件等。 展开更多
关键词 甜瓜属野生种 葡萄糖-6-磷酸脱氢酶基因 启动子 BAC文库 克隆 序列分析
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Ecotoxicological Effects of Cosmetic Formulas Containing Chemical and Mineral UV Filters on Seriatopora hystrix Fragments 认领 引用
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作者 Marius Anton Ionescu Marius Anton Ionescu +3 位作者 Catherine Le Breton Jean-Claude Hubaud Jean-Eric Branka Luc Lefeuvre 《Journal of Cosmetics, Dermatological Sciences and Applications》 2019年第3期228-234,共7页
Background: Over the last few years sunscreen products have been suspected to be harmful to corals, especially because of their putative negative impact on symbiotic microalgae housed by these cnidarians. Previous pub... Background: Over the last few years sunscreen products have been suspected to be harmful to corals, especially because of their putative negative impact on symbiotic microalgae housed by these cnidarians. Previous publications reported that minerals or chemical UV filters could induce the release of microalgae from corals inducing their bleaching. The study of the ecotoxicity of finished cosmetic products containing these filters is important. Objectives: We sought to assess ex vivo the toxicity of five emulsions containing UV-filters on coral cuttings of Seriatopora hystrix. Materials and Methods: Coral cuttings were put in contact with 5 different emulsions containing UV-filters. The toxicity readout was the ability to induce polyp retraction and/or fragment bleaching of the coral cuttings of Seriatopora hystrix. Results: In our experimental conditions, none of the five tested formulas neither induced any significant polyp retraction nor triggered fragment bleaching of the coral. Conclusions: The five tested emulsions containing UV-filters did not modify coral cuttings. In vivo, larger tests are necessary to verify the results of this ex vivo pilot study. 展开更多
关键词 Sunscreens Chemical UV Filters Mineral UV Filters Coral Polyp Retraction Coral Bleaching Seriatopora hystrix Ecotoxicology
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刺栲(Castanopsis hystrix)的气体交换和叶绿素a荧光特征 认领 引用 被引量：3
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作者 李静 叶万辉 徐志防 《热带亚热带植物学报》 CAS 北大核心 2006年第5期382-388,共7页
用LI-6400便携式光合测定系统和PAM-2100便携式植物荧光分析仪分别在初夏和秋季测定了广州龙眼洞林场刺栲(Castanopsishystrix)幼树叶片的气体交换和叶绿素a荧光参数。结果表明:1)刺栲冠层阳生叶的光饱和点为400μmolphotonsm-2s-1,最... 用LI-6400便携式光合测定系统和PAM-2100便携式植物荧光分析仪分别在初夏和秋季测定了广州龙眼洞林场刺栲(Castanopsishystrix)幼树叶片的气体交换和叶绿素a荧光参数。结果表明:1)刺栲冠层阳生叶的光饱和点为400μmolphotonsm-2s-1,最大光合速率在4-6μmolm-2s-1之间,说明刺栲幼树保持阳生植物的特征。阴生叶与阳生叶的叶绿素a/b值相似,均约为2.4,而阴生叶叶绿素b含量高于阳生叶,表明阴生叶具有潜在利用弱光的能力;2)刺栲幼树冠层叶片的PSⅡ的最大光化学效率Fv/Fm和光化学量子产额(Yield)的日动态变化在中午略有下降,说明其在强光下能发生可逆性的光抑制。刺栲冠层阳生叶的最大光合能力比较低,整个冠层叶能高效而稳定地利用散射和透射光,这些特征使得常绿的刺栲幼树能在林边或林下良好生长,较好地适应不同的光环境并成功渡过幼苗期,最终成为群落中的上层优势种。 展开更多
关键词 刺栲 气体交换 叶绿素荧光 光适应性
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A newly discovered Hystrix primigenia specimen from the Kemiklitepe collection at Ege University Natural History Museum:insights into paleobiogeography in Eurasia 认领 引用
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作者 Kazım HALAÇLAR Paul RUMMY +1 位作者 Serdar MAYDA Tao DENG 《Integrative Zoology》 SCIE CAS CSCD 2025年第1期73-87,共15页
Porcupines,members of the Hystricidae family,represent a unique group of herbivorous mammals.This study details the identification of a newly discovered mandible fragment of Hystrix primigenia,along with a right cheek ... Porcupines,members of the Hystricidae family,represent a unique group of herbivorous mammals.This study details the identification of a newly discovered mandible fragment of Hystrix primigenia,along with a right cheek tooth series from the middle Turolian Kemiklitepe-A fossil locality.While Hystrix fossils are found in numer-ous localities,the materials are often limited to a few dental fragments or isolated teeth,posing challenges to systematic investigations.The examination of this lower tooth series prompted a comprehensive review of all H.primigeniafindings across Eurasia,shedding light on its adaptive characteristics over time and space.Our paleo-biogeographical analysis indicates the absence of H.depereti in Late Miocene Türkiye,while the dispersal range of H.primigenia is broader than that of H.depereti in Eurasia.Additionally,the study delves into the discussion of H.primigenia and H.deperetifindings in Eurasia,ultimately refining the categorization of Late Miocene Hys-trix discoveries in Türkiye to two species:H.primigenia and H.kayae.Our review suggests the possibility of an additional H.kayaefinding from Samos,Greece. 展开更多
关键词 Hystrix Kemiklitepe late Miocene paleobiogeography Türkiye
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广东怀集不同树龄红锥叶片功能性状特征 认领 引用
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作者 刘俊涛 陈新宇 +6 位作者 徐放 廖焕琴 白青松 张玲 王雨欣 朱报著 张卫华 《西北林学院学报》 CSCD 北大核心 2026年第2期20-30,共11页
红锥是我国亚热带地区重要用材和生态树种,红锥古树的健康状况关乎生态系统稳定与生物多样性保护。目前不同树龄间红锥古树叶片性状变异特征及内在规律的研究仍显不足,直接影响到科学制定古树保护和管理措施。本研究通过选取广东怀集不... 红锥是我国亚热带地区重要用材和生态树种,红锥古树的健康状况关乎生态系统稳定与生物多样性保护。目前不同树龄间红锥古树叶片性状变异特征及内在规律的研究仍显不足,直接影响到科学制定古树保护和管理措施。本研究通过选取广东怀集不同树龄红锥古树为研究对象,依据树龄将红锥划分为1级、2级、3级古树以及后备资源林,通过测定不同树龄红锥叶片功能性状的叶面积(LA)、净光合速率(Pn)、气孔导度(Gs)、胞间二氧化碳浓度(Ci)、蒸腾速率(Tr)等11项指标,运用单因素方差分析、相关性分析、主成分分析等统计方法,探究不同树龄红锥叶片性状的特征及变异规律。结果表明,净光合速率、叶片相对含水率、蒸腾速率、气孔导度、叶片体积是评价不同树龄红锥叶片性状的关键因子。3级红锥古树叶片性状综合表现最优,且随着树龄增长,红锥树体衰老加剧,叶片光合性能逐渐减弱;后备资源林红锥叶片净光合速率、气孔导度、蒸腾速率显著高于红锥古树。不同树龄红锥11个叶片性状指标的总变异系数范围为2.96%~34.88%,表明各性状指标存在不同程度的变异。在林业生产实践中,建议对地上部分健康诊断评价等级达到3级以上古树进行重点复壮保护,加大复壮救治力度。 展开更多
关键词 红锥古树 叶片性状 相关关系 光合作用
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南亚热带栲树与红锥的生长规律及主要材性的比较 认领 引用
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作者 唐继新 朱雪萍 +5 位作者 刘衡 潘启龙 刘晓玲 蒋志林 陈东成 邹位锡 《中南林业科技大学学报》 CAS CSCD 北大核心 2026年第3期23-32,共10页
【目的】探究栲树Castanopsis fargesii与红锥Castanopsis hystrix生长过程与木材理化性质的差异,为其人工林的可持续经营及木材利用提供科学依据。【方法】以南亚热带立地条件相似的16年生栲树人工林和红锥人工林为对象,在各林分中分... 【目的】探究栲树Castanopsis fargesii与红锥Castanopsis hystrix生长过程与木材理化性质的差异,为其人工林的可持续经营及木材利用提供科学依据。【方法】以南亚热带立地条件相似的16年生栲树人工林和红锥人工林为对象,在各林分中分别伐取8株优势木,对比分析其关键测树因子的生长过程规律、木材密度、纤维形态、木材化学组分及化学性质的差异。【结果】1)栲树与红锥的胸径、树高和单株材积的生长趋势相似,但分别自第7年、第15年和第8年起,栲树的胸径、树高和单株材积的总生长量均显著高于红锥(P<0.05)。2树种树干的实验形数差异不显著,变化趋势类似。从第12年起,栲树与红锥的优势木树高明显高于相似立地同龄马尾松和杉木的优势木树高。2)栲树的气干密度(0.498 g/cm3)和基本密度(0.446 g/cm3)显著低于红锥的气干密度(0.569 g/cm3)和基本密度(0.464 g/cm3)。栲树与红锥在纤维长度、纤维长宽比及纤维腔径方面的差异不显著,但在纤维宽度、纤维壁厚、壁腔比和腔径比方面存在显著差异(P<0.05)。3)在中龄阶段,栲树与红锥的木材密度指标及纤维形态指标均符合优质造纸和纤维板生产原料的要求。4)栲树与红锥的心材和边材的pH值均处于胶黏剂适宜固化的酸碱范围内。栲树的综纤维素、α-纤维素和半纤维素含量均高于红锥,而木质素含量则低于红锥。5)栲树与红锥心边材的冷水抽提物含量差异不明显,但栲树的热水抽提物、1%NaOH抽提物和苯醇抽提物的含量均明显高于红锥。【结论】1)与红锥相比,栲树具有明显的速生优势,适宜作为乡土珍贵优良速生林培育;2)在中龄阶段,红锥与西南桦在其同龄混交林中的关系为互利共生的关系;3)栲树不宜与马尾松等相对慢生的阳性树种同龄混交;4)栲树适宜作为中短周期的一般用材(纸浆材、纤维板材、胶合板、普通实木用材)和高价值的薄木饰面材经营,而红锥生长相对较慢,适宜作为长周期的珍贵大径材和高价值的薄木饰面材经营。 展开更多
关键词 栲树 红锥 南亚热带 生长规律 木材材性
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红锥种植技术的创新与实践分析 认领 引用
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作者 苏建苗 黄柏华 邹位锡 《林业科技情报》 2026年第2期114-116,共3页
红锥(Castanopsis hystrix A.DC.)作为我国南方珍贵乡土阔叶树种,兼具用材、生态与经济价值。本文基于红锥生物学特性,系统分析传统种植技术局限,从育苗技术、造林模式、水肥管理、病虫害防控四大维度阐述创新路径,结合广东、广西多地... 红锥(Castanopsis hystrix A.DC.)作为我国南方珍贵乡土阔叶树种,兼具用材、生态与经济价值。本文基于红锥生物学特性,系统分析传统种植技术局限,从育苗技术、造林模式、水肥管理、病虫害防控四大维度阐述创新路径,结合广东、广西多地实践案例,通过数据对比与图表分析,验证创新技术的应用成效。研究表明:容器育苗技术可使成苗率提升25%以上,混交造林模式木材产量提高30%,精准水肥与绿色防控技术可降低病虫害发生率40%。最后指出当前技术推广中的瓶颈,并提出未来发展方向,为红锥规模化优质种植提供理论与实践参考。 展开更多
关键词 红锥 种植技术 创新路径 实践成效 混交造林
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