JEB logo

Journal of Environmental Biology

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

About Journal
    Home
    Editor in Chief
    Editorial Board
    Reviewer Panel
    Publication Policies
    Guidelines for Editors
    Guidelines for Reviewers
    Abstracting and Indexing
    Subscription and Payments
    Contact Journal
 
Read Journal
    Current Issue
    Journal Archives
 
For Authors
    Guidelines for Authors
    Terms and Conditions
    Fees and Payments
    Track Paper Status
 
Announcements
    JEB Awards
 

Google Search the Journal web-site:


    Abstract - Issue Sep 2011, 32 (5)                                     Back


nstantaneous and historical temperature effects on a-pinene

Studies on seed germination and growth in weed species

of rice field under salinity stress

 

Author Details

 

M.A. Hakim

Institute of Tropical Agriculture, University Putra Malaysia, 43400 UPM Serdang, Malaysia

Abdul Shukor Juraimi

(Corresponding author)??????

Department of Crop Science, Faculty of Agriculture, University Putra Malaysia, 43400 UPM Serdang,

Malaysia

e-mail: ashukorjuraimi@gmail.com

M.M. Hanafi

Institute of Tropical Agriculture, University Putra Malaysia, 43400 UPM Serdang, Malaysia

A. Selamat

Department of Crop Science, Faculty of Agriculture, University Putra Malaysia, 43400 UPM Serdang, Malaysia

Mohd Razi Ismail

Department of Crop Science, Faculty of Agriculture, University Putra Malaysia, 43400 UPM Serdang, Malaysia

 

 

S.M. Rezaul Karim

Department of Agronomy, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh

 

 

 

Publication Data

Paper received:

27 May 2010

 

Revised received:

10 December 2010

 

Accepted:

08 January 2011

 

Abstract

An investigation was made to see the salt tolerance of 10 weed species of rice. Properly dried and treated seeds of weed species were placed on 9 cm diameter petridishes lined with Whatman No. 1 filter paper under 6 salinity regimes, viz. 0 (control), 4, 8, 16, 24 and 32 dS m-1. The petri dishes were then kept in germinator at 25?1.0oC and 12 hr light. The number of germinated seeds were recorded daily. The final germination percentage, germination index (GI), seedling vigour index, mean germination time and time for 50% germination were estimated. Root and shoot lengths of the weed seedlings were measured at 20 days after salt application and relative growth values were calculated. Results revealed that salinity decreased final germination percentage, seed of germination as measured by GI, and shoot and root length in all the species. Germination of most of the weed seeds was completely arrested (0) at 32 dS m-1 salinity except in E. colona (12%) and C. iria (13.9%). The species C. iria, E. colona, J. linifolia and E. crusgalli showed better germination (above 30%) upto 24 dS m-1 salinity level and were regarded as salt-tolerant weed species. J. linifolia, F. miliacea, L. chinensis and O. sativa L. (weedy rice) were graded as moderately tolerant and S. zeylanica, S. grosus and C. difformis were regarded as least tolerant weed species.

Key words

Rice-field weeds, Weed seed germination, Seedling growth, Germination index, Salinity stress

 

Copyright ? 2011 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).