Objective:To screen the chitosan producing ability of endolichenic fungi and its antibacterial activity.Methods:Lichen collected from mangroves was screened for endophytes and the chitosan producing ability of endolic...Objective:To screen the chitosan producing ability of endolichenic fungi and its antibacterial activity.Methods:Lichen collected from mangroves was screened for endophytes and the chitosan producing ability of endolichenic fungi by submerged fermentation was also determined.Antibacterial activity was carried out against different pathogens.Results:Totally4 different groups of fungi were isolated from the lichen Roccella montagnei.Among the four genera,Aspergillus niger(A.niger)is potential to produce chitosan(1.3 g/L)on the twelfth day of incubation.Glucose plays an important role in the pnjductivity of chitosan and the yield was maximum at 10%(1.93 g/L).Antibacterial activity revealed that Vibrio cholerae was sensitive to chitosan followed by Escherichia coli.Conclusions:In conclusion,our findings suggest that A.niger is a potential candidate to produce more chitosan than the other strains and glucose plays an important role in the production of chitosan which proves to have a good antibacterial activity.展开更多
为探讨中国柄座衣属地衣的物种多样性,进一步明确其物种组成和分布,该文通过野外地衣资源调查及标本采集,结合形态学、解剖学、化学等研究方法,对采自云南省的柄座衣属地衣标本进行分类,共鉴定出柄座衣属(Malmidea)3个中国新记录种,分...为探讨中国柄座衣属地衣的物种多样性,进一步明确其物种组成和分布,该文通过野外地衣资源调查及标本采集,结合形态学、解剖学、化学等研究方法,对采自云南省的柄座衣属地衣标本进行分类,共鉴定出柄座衣属(Malmidea)3个中国新记录种,分别是巨孢柄座衣[M.indica(D. D. Awasthi&M. R. Agarwal) Hafellner&T. Sprib]、赭黄柄座衣(M.reunionis Kalb)、棕褐柄座衣(M.hechicerae Kalb)。该文提供了各新记录种的详细描述、形态及解剖图片,并与相近种进行了比较和讨论,同时提供了中国柄座衣属地衣分种检索表。该研究结果丰富了中国柄座衣属地衣资料,对中国地衣多样性的保护及研究具有一定意义。展开更多
In our continuous effort to explore the lichens in new and interesting areas FEEDS campus and SBG garden located in Manipur,a north-eastern state of India are surveyed.The study resulted in 47 species in FEEDS campus ...In our continuous effort to explore the lichens in new and interesting areas FEEDS campus and SBG garden located in Manipur,a north-eastern state of India are surveyed.The study resulted in 47 species in FEEDS campus and 80 species in SB garden respectively,while both areas shared 22 species in common.The crustose lichens were more dominant in the area represented by Graphidaceae(16 spp.)and Pyrenulaceae(15 spp.).The species composition in both the sites represented photophilic communities such as graphidaceous,physcioid and parmelioid lichens.FEEDS campus had open areas with cultivated plants where as SBG garden had semi-evergreen forest at its initial stage of succession.The study also added 55 lichen species as new distributional records to Manipur.展开更多
Lichen biota of Pathanamthitta district of Kerala state was thoroughly studied which resulted in 24 lichen species as new to Kerala and one species,Phaeographis nylanderi(Vain.)Zahlbr.as new to India.All the species i...Lichen biota of Pathanamthitta district of Kerala state was thoroughly studied which resulted in 24 lichen species as new to Kerala and one species,Phaeographis nylanderi(Vain.)Zahlbr.as new to India.All the species identified are either crustose or foliose forms belonging to families Graphidaceae and Caliciaceae indicating the dominance of these groups in the study area.List of all the 25 species are provided along with their distribution.展开更多
Lichens of Sirumalai hills are reported here for the first time.Lichen biota comprised of 95 species.The genus Japewiella is reported for the first time in India and is represented by J.tavaresiana(H.Magn.)Printzen.Fu...Lichens of Sirumalai hills are reported here for the first time.Lichen biota comprised of 95 species.The genus Japewiella is reported for the first time in India and is represented by J.tavaresiana(H.Magn.)Printzen.Furthermore,the following six taxa including one variety are new to India viz.Arthonia atra(Pers.)A.Schneid.,Graphis brevicarpa M.Nakan.,Kashiw.&K.H.Moon,Micarea erratica(Körb.)Hertel,Rambold&Pietschm.,Pertusaria cicatricosa var.deficiens A.W.Archer,Elix&Streimam,Porina subargillacea Müll Arg.,and Pyxine schmidtii Vain.Brief accounts for all the new records to India are provided to facilitate their identification.Arthonia redingeri Grube and Lepraria caesiella R.C.Harris are reported for the first time from south India.Besides all above,29 species are recorded for the first time from the state of Tamil Nadu.The lichen biota of the area is primarily corticolous in habitats and dominated by crustose form.展开更多
基金supported by Ministry of Environment and Forests.Govt.of India(grant No.22-9/2008-CS-1)
文摘Objective:To screen the chitosan producing ability of endolichenic fungi and its antibacterial activity.Methods:Lichen collected from mangroves was screened for endophytes and the chitosan producing ability of endolichenic fungi by submerged fermentation was also determined.Antibacterial activity was carried out against different pathogens.Results:Totally4 different groups of fungi were isolated from the lichen Roccella montagnei.Among the four genera,Aspergillus niger(A.niger)is potential to produce chitosan(1.3 g/L)on the twelfth day of incubation.Glucose plays an important role in the pnjductivity of chitosan and the yield was maximum at 10%(1.93 g/L).Antibacterial activity revealed that Vibrio cholerae was sensitive to chitosan followed by Escherichia coli.Conclusions:In conclusion,our findings suggest that A.niger is a potential candidate to produce more chitosan than the other strains and glucose plays an important role in the production of chitosan which proves to have a good antibacterial activity.
文摘为探讨中国柄座衣属地衣的物种多样性,进一步明确其物种组成和分布,该文通过野外地衣资源调查及标本采集,结合形态学、解剖学、化学等研究方法,对采自云南省的柄座衣属地衣标本进行分类,共鉴定出柄座衣属(Malmidea)3个中国新记录种,分别是巨孢柄座衣[M.indica(D. D. Awasthi&M. R. Agarwal) Hafellner&T. Sprib]、赭黄柄座衣(M.reunionis Kalb)、棕褐柄座衣(M.hechicerae Kalb)。该文提供了各新记录种的详细描述、形态及解剖图片,并与相近种进行了比较和讨论,同时提供了中国柄座衣属地衣分种检索表。该研究结果丰富了中国柄座衣属地衣资料,对中国地衣多样性的保护及研究具有一定意义。
基金support and facilities for conducting surveyScience and Engineering Board(SERB),New Delhi for financial assistance under project no.EMR/2016/006604 to SN and NPDF Fellowship no.PDF/2016/002054 to SJ.The author(SJ)is also thankful to DST,New Delhi for the financial assistance under INSPIRE Faculty scheme(IFA18-LSPA 124).(Manuscript number:CSIR-NBRI_MS/2020/05/11).
文摘In our continuous effort to explore the lichens in new and interesting areas FEEDS campus and SBG garden located in Manipur,a north-eastern state of India are surveyed.The study resulted in 47 species in FEEDS campus and 80 species in SB garden respectively,while both areas shared 22 species in common.The crustose lichens were more dominant in the area represented by Graphidaceae(16 spp.)and Pyrenulaceae(15 spp.).The species composition in both the sites represented photophilic communities such as graphidaceous,physcioid and parmelioid lichens.FEEDS campus had open areas with cultivated plants where as SBG garden had semi-evergreen forest at its initial stage of succession.The study also added 55 lichen species as new distributional records to Manipur.
文摘Lichen biota of Pathanamthitta district of Kerala state was thoroughly studied which resulted in 24 lichen species as new to Kerala and one species,Phaeographis nylanderi(Vain.)Zahlbr.as new to India.All the species identified are either crustose or foliose forms belonging to families Graphidaceae and Caliciaceae indicating the dominance of these groups in the study area.List of all the 25 species are provided along with their distribution.
基金The authors are thankful to the Director of CSIR-NBRI for providing laboratory facilities and to the Principal of Kamaraj College of Engineering and Technology,Head of Biotechnology Department and members of the organizing committee for the LBB2017 workshop.One of the authors(SJ)is thankful to DST,New Delhi for the financial assistance under INSPIRE Faculty scheme(IFA18-LSPA 124)The authors are also grateful to Sirumalai Reserve Forest authorities for their permission to study the lichens of the area.(CSIR-NBRI manuscript numberCSIR-NBRI_MS/2019/12/04).
文摘Lichens of Sirumalai hills are reported here for the first time.Lichen biota comprised of 95 species.The genus Japewiella is reported for the first time in India and is represented by J.tavaresiana(H.Magn.)Printzen.Furthermore,the following six taxa including one variety are new to India viz.Arthonia atra(Pers.)A.Schneid.,Graphis brevicarpa M.Nakan.,Kashiw.&K.H.Moon,Micarea erratica(Körb.)Hertel,Rambold&Pietschm.,Pertusaria cicatricosa var.deficiens A.W.Archer,Elix&Streimam,Porina subargillacea Müll Arg.,and Pyxine schmidtii Vain.Brief accounts for all the new records to India are provided to facilitate their identification.Arthonia redingeri Grube and Lepraria caesiella R.C.Harris are reported for the first time from south India.Besides all above,29 species are recorded for the first time from the state of Tamil Nadu.The lichen biota of the area is primarily corticolous in habitats and dominated by crustose form.
基金Natural Science Foundation of Hebei Province (C2010000268)Natural Science Foundation of Hebei University (Y2007-099)+1 种基金supported by the Editorial Committee of the Cryptogamic Flora of China, Chinese Academy of SciencesFunds for the Liupanshan Insect Resource (LIR0810)