JEB logo

Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

About Journal
    Editorial Board
    Reviewer Panel
    RnD Division
    Subscription Info
    Contact Journal
 
Read Journal
    Current Issue
    Journal Archives
 
For Authors
    Authoring Guidelines
    Publication Process
    Track Paper Status
 

Search the Journal web-site through Google:


        Abstract - Issue Nov 2017, 38 (6)                                                                                                             Back



nstantaneous and historical temperature effects on a-pinene

Allelopathic effects among selected species of

phytoplankton and macrophytes

 

D. Chicalote-Castillo1, P. Ram?rez-Garc?a1* and M.L. Mac?as-Rubalcava2

1Universidad Nacional Aut?noma de M?xico, FES-Iztacala, Research and Postgraduate Division, Av. de los Barrios No. 1,

54090 Tlalnepantla, Estado de M?xico, M?xico

2Universidad Nacional Aut?noma de Mexico. Institute of Chemistry Department of Natural Products Ciudad Universitaria,

Mexico City, Del.Coyoac?n 04510, Mexico

*Corresponding Author E-mail: micro@unam.mx

 

 

 

Key words

Allelopathy

Microcystis aeruginosa

Phragmites australis

Scenedesmus acutus

Schoenoplectus californicus 

 

 

Publication Data

Paper received : 13.09.2016

Revised received : 03.01.2017

Re-revised received : 24.05.2017

Accepted : 11.08.2017

 

Abstract

Aim: To understand the allelopathy among different taxonomic levels of freshwater photoautotrophs, the effect of aqueous extracts of Phragmites australis and Schoenoplectus californicus on monocultures of Microcystis aeruginosa and Scenedesmus acutus was investigated. In addition, the cell extract and filtered medium of each phytoplankton species were used and tested between them.

 

Methodology: In the macrophyte bioassays against alga, the allelopathic effect was evaluated separately using 10 and 20 mg of aqueous extract of leaf, stem and rhizome of Phragmites, as well as the stem and rhizome of Schoenoplectus. In the assays between the phytoplankton species, the cell extract (12.44 ? 0.16 ?gl-1 microcistin-LR equivalents) and the filtered culture medium (2.98 ? 0.03 ?gl-1 microcistin-LR equivalents) of Microcystis were used in 100 and 50% and were added to the Scenedesmus monocultures. In the same proportion, the cell extract and the filtered culture medium of Scenedesmus on monocultures of Microcystis were used..

 

Results: In Phragmites, leaf extract showed greater inhibition activity than the other plant organs on Microcystis cultures. The stem and rhizome showed a larger decrease for the growth of Scenedesmus cultures. For Schoenoplectus, the stem extract showed a greater inhibitory effect than the rhizome extract; this was observed on both alga and cyanobacteria. Microcystis when in contact with the cellular extract of Scenedesmus, it was observed that the bioactive containing substances in the extract had a greater inhibitory activity.  

 

Interpretation: The leaf, stem and rhizome extracts of Phragmites and Schoenoplectus showed a different affinity of the allelopathic activity on Microcystis and Scenedesmus, suggesting a species-specific relationship.

 

 

Copyright ? 2017 Triveni Enterprises. All rights reserved. No part of the Journal can be reproduced in any form without prior permission. Responsibility regarding the authenticity of the data, and the acceptability of the conclusions enforced or derived, rest completely with the author(s).