Microcystin Biosynthesis and mcyA Expression in Geographically Distinct Microcystis Strains under Different Nitrogen, Phosphorus, and Boron Regimes

Joint Authors

Srivastava, Ankita
Ahn, Chi-Yong
Asthana, Ravi Kumar
Oh, Hee-Mock
Ko, So-Ra
Ravi, Alok Kumar

Source

BioMed Research International

Issue

Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-13, 13 p.

Publisher

Hindawi Publishing Corporation

Publication Date

2016-10-10

Country of Publication

Egypt

No. of Pages

13

Main Subjects

Medicine

Abstract EN

Roles of nutrients and other environmental variables in development of cyanobacterial bloom and its toxicity are complex and not well understood.

We have monitored the photoautotrophic growth, total microcystin concentration, and microcystins synthetase gene (mcyA) expression in lab-grown strains of Microcystis NIES 843 (reference strain), KW (Wangsong Reservoir, South Korea), and Durgakund (Varanasi, India) under different nutrient regimes (nitrogen, phosphorus, and boron).

Higher level of nitrogen and boron resulted in increased growth (avg.

5 and 6.5 Chl a mg/L, resp.), total microcystin concentrations (avg.

1.185 and 7.153 mg/L, resp.), and mcyA transcript but its expression was not directly correlated with total microcystin concentrations in the target strains.

Interestingly, Durgakund strain had much lower microcystin content and lacked microcystin-YR variant over NIES 843 and KW.

It is inferred that microcystin concentration and its variants are strain specific.

We have also examined the heterotrophic bacteria associated with cyanobacterial bloom in Durgakund Pond and Wangsong Reservoir which were found to be enriched in Alpha-, Beta-, and Gammaproteobacteria and that could influence the bloom dynamics.

American Psychological Association (APA)

Srivastava, Ankita& Ko, So-Ra& Ahn, Chi-Yong& Oh, Hee-Mock& Ravi, Alok Kumar& Asthana, Ravi Kumar. 2016. Microcystin Biosynthesis and mcyA Expression in Geographically Distinct Microcystis Strains under Different Nitrogen, Phosphorus, and Boron Regimes. BioMed Research International،Vol. 2016, no. 2016, pp.1-13.
https://search.emarefa.net/detail/BIM-1098324

Modern Language Association (MLA)

Srivastava, Ankita…[et al.]. Microcystin Biosynthesis and mcyA Expression in Geographically Distinct Microcystis Strains under Different Nitrogen, Phosphorus, and Boron Regimes. BioMed Research International No. 2016 (2016), pp.1-13.
https://search.emarefa.net/detail/BIM-1098324

American Medical Association (AMA)

Srivastava, Ankita& Ko, So-Ra& Ahn, Chi-Yong& Oh, Hee-Mock& Ravi, Alok Kumar& Asthana, Ravi Kumar. Microcystin Biosynthesis and mcyA Expression in Geographically Distinct Microcystis Strains under Different Nitrogen, Phosphorus, and Boron Regimes. BioMed Research International. 2016. Vol. 2016, no. 2016, pp.1-13.
https://search.emarefa.net/detail/BIM-1098324

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references

Record ID

BIM-1098324