Correctly identifying species of Chlorella‐like microalgae is difficult because of their morphological simplicity and high phenotypic plasticity. The use of molecular tools has revolutionized research on algal diversity, enabling such advances as the discovery of numerous new taxa. This article presents the results of a study of strains that are newly isolated from a freshwater Lake Prudovikov (Samara region, Russian Federation). These strains had the typical Chlorella morphology, exhibiting spherical cells and a cup‐shaped parietal chloroplast. The chloroplast contained a single pyrenoid enveloped by starch grains. However, 18S–ITS1–5.8S–ITS2 sequence analyses indicated that the studied strains are strongly allied with the well‐supported genus Micractinium. Based on the results of a comparative analysis of the morphological, molecular and environmental characteristics of the studied strains (employing a polyphasic approach), we propose that they are new species of Micractinium: Micractinium kostikovii sp. nov.
{"title":"New species Micractinium kostikovii (Chlorellaceae, Trebouxiophyceae) from Russia","authors":"E. Krivina, A. Temraleeva, M. Sinetova","doi":"10.1111/pre.12469","DOIUrl":"https://doi.org/10.1111/pre.12469","url":null,"abstract":"Correctly identifying species of Chlorella‐like microalgae is difficult because of their morphological simplicity and high phenotypic plasticity. The use of molecular tools has revolutionized research on algal diversity, enabling such advances as the discovery of numerous new taxa. This article presents the results of a study of strains that are newly isolated from a freshwater Lake Prudovikov (Samara region, Russian Federation). These strains had the typical Chlorella morphology, exhibiting spherical cells and a cup‐shaped parietal chloroplast. The chloroplast contained a single pyrenoid enveloped by starch grains. However, 18S–ITS1–5.8S–ITS2 sequence analyses indicated that the studied strains are strongly allied with the well‐supported genus Micractinium. Based on the results of a comparative analysis of the morphological, molecular and environmental characteristics of the studied strains (employing a polyphasic approach), we propose that they are new species of Micractinium: Micractinium kostikovii sp. nov.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45922318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Morphology of Watanabea lichenicola Chiva, Dumitru, Bordenave & Barreno isolated from Buellia zoharyi lichen species. Left, micrograph of mature cells by transmission electron microscopy; upper right, light micrograph of W. lichenicola; Lower right, confocal reconstruction of mature chloroplast.
{"title":"Novelties in nomenclature and typification appearing in Phycological Research 69 (4)","authors":"","doi":"10.1111/pre.12468","DOIUrl":"https://doi.org/10.1111/pre.12468","url":null,"abstract":"","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46331047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We conducted a morphological observation and molecular phylogenetic analyses on bladed Bangiales collected from natural populations on Shikinejima Island and Hachijojima Island of the Izu Islands, southern central Japan. The morphological features of the gametophytic blades such as the blade shape, blade margin and reproductive cell divisions were extremely similar to those parameters of Neoporphyra haitanensis, a species cultivated in southern China, and Neoporphyra dentata. However, the blades collected from the two islands were thicker than the blades of N. dentata; this feature was the same as that of N. haitanensis. The chloroplast RUBISCO spacer sequences of present samples were identical to the sequences of N. haitanensis from China. Moreover, phylogenetic positions of three conchocelis strains isolated from the blades on the two islands were examined based on concatenated sequences of the chloroplast rbcL gene and nuclear 18S rRNA. The results showed that the strains were resolved in a clade including N. haitanensis; however, the strains were separated from N. haitanensis in China. Therefore, the bladed Bangiales from the two islands were identified as N. haitanensis. The present study is the first record of N. haitanensis in natural populations in Japan.
{"title":"First record of Neoporphyra haitanensis (T.J.Chang & B.F.Zheng) J.Brodie & L.‐E.Yang (Bangiales, Rhodophyta) from Shikinejima Island and Hachijojima Island of the Izu Islands, southern central Japan","authors":"F. Sano, Airi Ikeura, A. Takasugi, K. Niwa","doi":"10.1111/pre.12466","DOIUrl":"https://doi.org/10.1111/pre.12466","url":null,"abstract":"We conducted a morphological observation and molecular phylogenetic analyses on bladed Bangiales collected from natural populations on Shikinejima Island and Hachijojima Island of the Izu Islands, southern central Japan. The morphological features of the gametophytic blades such as the blade shape, blade margin and reproductive cell divisions were extremely similar to those parameters of Neoporphyra haitanensis, a species cultivated in southern China, and Neoporphyra dentata. However, the blades collected from the two islands were thicker than the blades of N. dentata; this feature was the same as that of N. haitanensis. The chloroplast RUBISCO spacer sequences of present samples were identical to the sequences of N. haitanensis from China. Moreover, phylogenetic positions of three conchocelis strains isolated from the blades on the two islands were examined based on concatenated sequences of the chloroplast rbcL gene and nuclear 18S rRNA. The results showed that the strains were resolved in a clade including N. haitanensis; however, the strains were separated from N. haitanensis in China. Therefore, the bladed Bangiales from the two islands were identified as N. haitanensis. The present study is the first record of N. haitanensis in natural populations in Japan.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/pre.12466","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45602678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Westermeier, Carmen González, P. Murúa, J. Morales, David J. Patiño, Natacha Fabres, Jaime Zamorano, D. Müller
Chile is one of the top carrageenan producers worldwide, and Sarcopeltis (ex Gigartina) skottsbergii one of the topmost exploited carrageenophytes from the wild in the world. Total yield, gel strength and viscosity from two contrasting environments Calbuco and Ancud (Inner and Outer Sea, Chile) were estimated monthly in approximately 2 years for this species. While carrageenan yields did not show differences between localities, gametophytes in spring–summer had 15% higher, compared to tetrasporophytes. Sizes (frond surface) normally did not affect carrageenan yields. Gametophytes showed clear differences in gel strength between seasons, but not between localities, with maximum peaks during winter–spring months in Calbuco and autumn‐winter months in Ancud. Seasonal variations in viscosity were also significant. While gametophyte viscosity did not exceed 120 cPs, tetrasporophytes reached 1400 cPs in Calbuco and 1000 cPs in Ancud. More remarkably, a positive correlation between viscosity and gel strength was found in S. skottsbergii gametophytes, which is significantly different between both localities. These results suggest that selective harvesting in spring–summer should be preferred to optimize cost–benefit of harvesting activities and subsequent carrageenan productivity.
{"title":"Seasonal variation of carrageenan yield, gel strength and viscosity in Sarcopeltis (ex Gigartina) skottsbergii from Southern Chile","authors":"R. Westermeier, Carmen González, P. Murúa, J. Morales, David J. Patiño, Natacha Fabres, Jaime Zamorano, D. Müller","doi":"10.1111/pre.12467","DOIUrl":"https://doi.org/10.1111/pre.12467","url":null,"abstract":"Chile is one of the top carrageenan producers worldwide, and Sarcopeltis (ex Gigartina) skottsbergii one of the topmost exploited carrageenophytes from the wild in the world. Total yield, gel strength and viscosity from two contrasting environments Calbuco and Ancud (Inner and Outer Sea, Chile) were estimated monthly in approximately 2 years for this species. While carrageenan yields did not show differences between localities, gametophytes in spring–summer had 15% higher, compared to tetrasporophytes. Sizes (frond surface) normally did not affect carrageenan yields. Gametophytes showed clear differences in gel strength between seasons, but not between localities, with maximum peaks during winter–spring months in Calbuco and autumn‐winter months in Ancud. Seasonal variations in viscosity were also significant. While gametophyte viscosity did not exceed 120 cPs, tetrasporophytes reached 1400 cPs in Calbuco and 1000 cPs in Ancud. More remarkably, a positive correlation between viscosity and gel strength was found in S. skottsbergii gametophytes, which is significantly different between both localities. These results suggest that selective harvesting in spring–summer should be preferred to optimize cost–benefit of harvesting activities and subsequent carrageenan productivity.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48693815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Julião, C. Afonso, A. Gomes‐Bispo, N. Bandarra, C. Cardoso
The effect of drying on two brown seaweed (Treptacantha abies‐marina and Cystoseira humilis) and two red seaweed species (Asparagopsis armata and Asparagopsis taxiformis) was evaluated based on the levels of biological activity, such as antioxidant and anti‐inflammatory properties. Moreover, the contents of some significant compound classes, such as polyphenols and beta‐glucans, were determined. Seaweeds C. humilis and T. abies‐marina showed high polyphenol levels (1.76–6.78 mg gallic acid equivalents g−1 dw), which clearly exceeded those determined in the Asparagopsis genus regardless of drying process. This was partially reflected in the antioxidant activity as measured by DPPH and FRAP methods, which showed that extracts from C. humilis and T. abies‐marina in most cases had stronger antioxidant activity than those from Asparagopsis species. The influence of the drying technique upon the antioxidant activity was relatively limited, since in many instances there was no effect. Concerning anti‐inflammatory activity, in the case of shade‐dried samples, C. humilis had a higher activity (>30% COX‐2 inhibition) than A. armata. However, this activity in C. humilis was not rendered available in the upper gastrointestinal (GI) tract. Indeed, only A. taxiformis displayed anti‐inflammatory activity in the fraction available in the upper GI tract, showing an upper GI tract availability in the 90–100% range. Therefore, though bioactivity levels were higher in C. humilis and T. abies‐marina, Asparagopsis species also had substantial levels of bioactive compound. Sun‐drying produced more negative effects than shade‐drying, but these effects were not very extensive.
{"title":"The effect of drying on undervalued brown and red seaweed species: Bioactivity alterations","authors":"D. Julião, C. Afonso, A. Gomes‐Bispo, N. Bandarra, C. Cardoso","doi":"10.1111/pre.12465","DOIUrl":"https://doi.org/10.1111/pre.12465","url":null,"abstract":"The effect of drying on two brown seaweed (Treptacantha abies‐marina and Cystoseira humilis) and two red seaweed species (Asparagopsis armata and Asparagopsis taxiformis) was evaluated based on the levels of biological activity, such as antioxidant and anti‐inflammatory properties. Moreover, the contents of some significant compound classes, such as polyphenols and beta‐glucans, were determined. Seaweeds C. humilis and T. abies‐marina showed high polyphenol levels (1.76–6.78 mg gallic acid equivalents g−1 dw), which clearly exceeded those determined in the Asparagopsis genus regardless of drying process. This was partially reflected in the antioxidant activity as measured by DPPH and FRAP methods, which showed that extracts from C. humilis and T. abies‐marina in most cases had stronger antioxidant activity than those from Asparagopsis species. The influence of the drying technique upon the antioxidant activity was relatively limited, since in many instances there was no effect. Concerning anti‐inflammatory activity, in the case of shade‐dried samples, C. humilis had a higher activity (>30% COX‐2 inhibition) than A. armata. However, this activity in C. humilis was not rendered available in the upper gastrointestinal (GI) tract. Indeed, only A. taxiformis displayed anti‐inflammatory activity in the fraction available in the upper GI tract, showing an upper GI tract availability in the 90–100% range. Therefore, though bioactivity levels were higher in C. humilis and T. abies‐marina, Asparagopsis species also had substantial levels of bioactive compound. Sun‐drying produced more negative effects than shade‐drying, but these effects were not very extensive.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/pre.12465","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43312007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mahiko Abe, N. Kikuchi, M. Tamaki, Tomoko Sato, N. Murase, Eiji Fujiyoshi, Masahiro Kobayashi
A new species of Neoporphyra, Neoporphyra kitoi sp. nov., collected in Honshu, Japan, is described based on morphology and molecular analysis. The new species can be distinguished from other foliose Bangiales species by both molecular analysis and developmentally with the production of new blades arising from rhizoidal cells and giving rise to multiple blades. Thalli of N. kitoi were observed to produce single and multiple blades in both fields collected and cultured thalli. Neoporphyra kitoi was morphologically similar to Pyropia pseudolinearis apart from this developmental feature. Molecular phylogenies based on both the nrSSU and rbcL genes of this species resolved it in a clade containing sequences assigned to the genus Neoporphyra.
{"title":"Neoporphyra kitoi sp. nov. (Bangiales, Rhodophyta) from Japan, with new blades arising from rhizoidal cells","authors":"Mahiko Abe, N. Kikuchi, M. Tamaki, Tomoko Sato, N. Murase, Eiji Fujiyoshi, Masahiro Kobayashi","doi":"10.1111/pre.12464","DOIUrl":"https://doi.org/10.1111/pre.12464","url":null,"abstract":"A new species of Neoporphyra, Neoporphyra kitoi sp. nov., collected in Honshu, Japan, is described based on morphology and molecular analysis. The new species can be distinguished from other foliose Bangiales species by both molecular analysis and developmentally with the production of new blades arising from rhizoidal cells and giving rise to multiple blades. Thalli of N. kitoi were observed to produce single and multiple blades in both fields collected and cultured thalli. Neoporphyra kitoi was morphologically similar to Pyropia pseudolinearis apart from this developmental feature. Molecular phylogenies based on both the nrSSU and rbcL genes of this species resolved it in a clade containing sequences assigned to the genus Neoporphyra.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/pre.12464","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49208089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Microalgae of the genus Watanabea are widely distributed as free living in soil/subaerial and aquatic habitats. In this study, two Watanabea spp. were isolated from lichen thalli of Buellia zoharyi collected on biocrusts in the Iberian Peninsula and the Canary Islands. To ascertain their taxonomic position and phylogenetic relationships within the genus Watanabea, morphological observations were performed using light and confocal microscopy, combined with molecular analyses based on the phylogeny of small subunit ribosomal region (SSU) and internal transcribed spacer region (ITS) genes and the ITS2 secondary structure. One isolate matches Watanabea acidophila, and the other, which has not been previously reported, is described here as Watanabea lichenicola sp. nov. Both molecular phylogenetic analyses (SSU and ITS) suggest the division of the Watanabea spp. into two well‐supported clades: Watanabea group I and Watanabea group II, to which W. lichenicola and W. acidophila belong, respectively. Furthermore, an exclusive side loop in helix 3 of the ITS2 secondary structure of Watanabea group II reinforces the use of this analysis as a molecular hallmark for this genus. The integrative approaches carried out in this study suggest lichen thalli as a new ecological niche for this genus, either as associated (not primary symbiont), epiphyte and/or endophyte microalgae in Buellia zoharyi holobionts.
Watanabea属微藻广泛分布于土壤/地面和水生生境中。本研究从伊比利亚半岛和加那利群岛生物结皮上收集的zoharyi Buellia地衣菌体中分离到了两个Watanabea。为了确定它们在Watanabea属中的分类位置和系统发育关系，利用光学和共聚焦显微镜进行了形态学观察，并结合基于小亚基核糖体区(SSU)和内部转录间隔区(ITS)基因和ITS2二级结构的系统发育分子分析。其中一株与Watanabea lichenicola相匹配，另一株则是Watanabea lichenicola sp. 11，此前未见报道。两种分子系统发育分析(SSU和ITS)都表明Watanabea sp.可分为两个支持良好的分支:Watanabea group I和Watanabea group II，分别属于W. lichenicola和W. acidophila。此外，Watanabea group II的ITS2二级结构的螺旋3的排他侧环加强了这种分析作为该属的分子标志的使用。本研究中采用的综合方法表明，地衣是该属的一个新的生态位，无论是作为伴生(非主要共生体)、附生和/或内生微藻，都是zoellia zoharyi holobionts。
{"title":"Watanabea green microalgae (Trebouxiophyceae) inhabiting lichen holobiomes: Watanabea lichenicola sp. nova","authors":"S. Chiva, C. Dumitru, C. Bordenave, E. Barreno","doi":"10.1111/pre.12463","DOIUrl":"https://doi.org/10.1111/pre.12463","url":null,"abstract":"Microalgae of the genus Watanabea are widely distributed as free living in soil/subaerial and aquatic habitats. In this study, two Watanabea spp. were isolated from lichen thalli of Buellia zoharyi collected on biocrusts in the Iberian Peninsula and the Canary Islands. To ascertain their taxonomic position and phylogenetic relationships within the genus Watanabea, morphological observations were performed using light and confocal microscopy, combined with molecular analyses based on the phylogeny of small subunit ribosomal region (SSU) and internal transcribed spacer region (ITS) genes and the ITS2 secondary structure. One isolate matches Watanabea acidophila, and the other, which has not been previously reported, is described here as Watanabea lichenicola sp. nov. Both molecular phylogenetic analyses (SSU and ITS) suggest the division of the Watanabea spp. into two well‐supported clades: Watanabea group I and Watanabea group II, to which W. lichenicola and W. acidophila belong, respectively. Furthermore, an exclusive side loop in helix 3 of the ITS2 secondary structure of Watanabea group II reinforces the use of this analysis as a molecular hallmark for this genus. The integrative approaches carried out in this study suggest lichen thalli as a new ecological niche for this genus, either as associated (not primary symbiont), epiphyte and/or endophyte microalgae in Buellia zoharyi holobionts.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/pre.12463","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48854048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Liow, W. Lau, Ing Kuo Law, H. Gu, C. Leaw, P. Lim
Resting cysts of harmful marine dinoflagellates, including Alexandrium species, play an important role in their bloom dynamics, where massive cyst germination is regarded as the natural phenomenon that initiates blooms. The life cycle of Alexandrium minutum from the temperate region has been intensively studied, however, related studies on its tropical counterparts are scarce. In this study, sexual reproduction of a toxigenic A. minutum (tropical Pacific ribotype) was investigated in a laboratory setting. Gamete expression was observed in both compatible cross‐mating and self‐crossed cultures, but sexual induction was observed only in the compatible cross‐mating cultures, confirming the heterothallic nature of the species. Resting cysts were successfully produced in 41 out of 91 pairwise combinations of cross‐mating strains. The crossing matrix results showed that the mating system of the tropical Pacific A. minutum was complex, with at least four distinct mating groups observed. The resting cysts had a relatively shorter dormancy period (5–8 days). The rapid encystment‐excystment processes and a short cyst dormancy period in this tropical Pacific A. minutum are believed to play crucial roles in governing the bloom and its dynamics in the tropical coastal region.
{"title":"Sexual processes and life cycle transitions of the tropical Pacific Alexandrium minutum (Dinophyceae)","authors":"G. Liow, W. Lau, Ing Kuo Law, H. Gu, C. Leaw, P. Lim","doi":"10.1111/pre.12460","DOIUrl":"https://doi.org/10.1111/pre.12460","url":null,"abstract":"Resting cysts of harmful marine dinoflagellates, including Alexandrium species, play an important role in their bloom dynamics, where massive cyst germination is regarded as the natural phenomenon that initiates blooms. The life cycle of Alexandrium minutum from the temperate region has been intensively studied, however, related studies on its tropical counterparts are scarce. In this study, sexual reproduction of a toxigenic A. minutum (tropical Pacific ribotype) was investigated in a laboratory setting. Gamete expression was observed in both compatible cross‐mating and self‐crossed cultures, but sexual induction was observed only in the compatible cross‐mating cultures, confirming the heterothallic nature of the species. Resting cysts were successfully produced in 41 out of 91 pairwise combinations of cross‐mating strains. The crossing matrix results showed that the mating system of the tropical Pacific A. minutum was complex, with at least four distinct mating groups observed. The resting cysts had a relatively shorter dormancy period (5–8 days). The rapid encystment‐excystment processes and a short cyst dormancy period in this tropical Pacific A. minutum are believed to play crucial roles in governing the bloom and its dynamics in the tropical coastal region.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/pre.12460","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42752870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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