Arid
DOI10.1007/s10811-014-0328-0
Diversity, molecular phylogeny, and metabolic activity of cyanobacteria in biological soil crusts from Santiniketan (India)
Kumar, Dhanesh1,2; Adhikary, Siba Prasad1
通讯作者Kumar, Dhanesh
来源期刊JOURNAL OF APPLIED PHYCOLOGY
ISSN0921-8971
EISSN1573-5176
出版年2015
卷号27期号:1页码:339-349
英文摘要

The biological soil crusts that appear on the arid soils of Santiniketan, India soon after receiving monsoon rain were studied. The phototrophic organisms in the crusts were principally composed of sheath-forming cyanobacteria belonging to the genera Scytonema and Tolypothrix as the major components along with associated species of 14 different genera. 16S ribosomal RNA (rRNA) sequencing of these organisms showed that they formed a cluster quite different from Leptolyngbya, Microcoleus, and Phormidium, however, were close to Scytonema and Tolypothrix reported from similar biofilms on soils of USA and Costa Rica. All these major cyanobacteria species in soil crust possessed scytonemin in higher proportion than chlorophyll a, suggesting its role in protection from high solar irradiance and UV. Dried crusts started respiring soon after wetting followed by photosynthesis. Nitrogenase activity also revived after 2 to 12 h of wetting and progressed rapidly with longer period of wet conditions coinciding with appearance of heterocysts in the filaments. These results showed that a number of cyanobacteria with distinct sheath layer survived within the soil crusts in desiccated state and revived their metabolic activity soon after receiving monsoon rain thus contributing to carbon as well as nitrogen fixation in the environment and to nutrient mobilization making the soil productive.


英文关键词Biological soil crusts Cyanobacteria Molecular phylogeny Rewetting Metabolic activity
类型Article
语种英语
国家India ; Czech Republic
收录类别SCI-E
WOS记录号WOS:000348137600033
WOS关键词BLUE-GREEN-ALGAE ; TERRESTRIAL CYANOBACTERIUM ; DESERT CRUSTS ; COLORADO PLATEAU ; NOSTOC-COMMUNE ; SHEATH PIGMENT ; NORTH-AMERICA ; SCYTONEMIN ; NITROGEN ; OSCILLATORIALES
WOS类目Biotechnology & Applied Microbiology ; Marine & Freshwater Biology
WOS研究方向Biotechnology & Applied Microbiology ; Marine & Freshwater Biology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/188237
作者单位1.Inst Sci, Dept Biotechnol, Santini Ketan 731235, W Bengal, India;
2.Inst Chem Technol, Fac Food & Biochem Technol, CR-16628 Prague 6, Czech Republic
推荐引用方式
GB/T 7714
Kumar, Dhanesh,Adhikary, Siba Prasad. Diversity, molecular phylogeny, and metabolic activity of cyanobacteria in biological soil crusts from Santiniketan (India)[J],2015,27(1):339-349.
APA Kumar, Dhanesh,&Adhikary, Siba Prasad.(2015).Diversity, molecular phylogeny, and metabolic activity of cyanobacteria in biological soil crusts from Santiniketan (India).JOURNAL OF APPLIED PHYCOLOGY,27(1),339-349.
MLA Kumar, Dhanesh,et al."Diversity, molecular phylogeny, and metabolic activity of cyanobacteria in biological soil crusts from Santiniketan (India)".JOURNAL OF APPLIED PHYCOLOGY 27.1(2015):339-349.
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