Cover Image

Phytotoxic effects of the extracts and compounds isolated from napiergrass (pennisetum purpureum) on Chinese sprangletop (leptochloa chinensis) germination and seedling growth in aerobic rice systems

Chinese sprangletop, a problematic weed in aerobic rice fields, has developed resistance to various groups of herbicides. In search of natural herbicides, the phytotoxic effects of napiergrass extracts on Chinese sprangletop were investigated. Phytotoxicity-directed extraction and fractionation of t...

Full description

Saved in:
Bibliographic Details
Main Authors: Tse Seng Chuah, Md Zain Norhafizah, Sahid Ismail
Format: Non-Indexed Article
Published: 2014
Online Access:http://discol.umk.edu.my/id/eprint/8107/
http://www.wssajournals.org/doi/abs/10.1614/WS-D-13-00128.1
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.umk.eprints.8107
record_format eprints
spelling my.umk.eprints.81072022-05-23T10:25:19Z http://discol.umk.edu.my/id/eprint/8107/ Phytotoxic effects of the extracts and compounds isolated from napiergrass (pennisetum purpureum) on Chinese sprangletop (leptochloa chinensis) germination and seedling growth in aerobic rice systems Tse Seng Chuah Md Zain Norhafizah Sahid Ismail Chinese sprangletop, a problematic weed in aerobic rice fields, has developed resistance to various groups of herbicides. In search of natural herbicides, the phytotoxic effects of napiergrass extracts on Chinese sprangletop were investigated. Phytotoxicity-directed extraction and fractionation of the culm plus leaves of napiergrass led to the isolation and identification of three major compounds: 2,4-di-tert-butylphenol (2,4-DTBP), cis-9-octadecenoic methyl ester (methyl oleate), and phthalic acid, mono-(2-ethylhexyl) ester (MEHP). These compounds showed different degrees of inhibition against the tested bioassay species. 2,4-DTBP was the most potent of the three compounds and completely inhibited the germination of Chinese sprangletop at the concentration of 0.5 g L−1, followed by MEHP, where 62% inhibition of germination was obtained. In contrast, methyl oleate showed only slight inhibition (< 10%) of germination. A soil bioassay further demonstrated that 2,4-DTBP is a strong inhibitor of root growth and completely prevented root growth of Chinese sprangletop at an application rate as low as 0.60 kg ai ha−1. Under aerobic conditions, 2,4-DTBP at 2.4 kg ai ha−1 reduced the emergence and shoot fresh weight of Chinese sprangletop by more than 60%, with negligible effect on root and shoot growth of aerobic rice seedlings, suggesting that 2.4 kg ai ha−1 2,4-DTBP is the most suitable rate to control Chinese sprangletop without injuring rice seedlings. Reduction in shoot height of rice plant was evident at 0 d after sowing across 2,4-DTBP rates. However, the rice plants became less susceptible with increasing growth stages. The present findings imply that 2,4-DTBP may potentially be developed as a PRE soil-applied natural herbicide for control of Chinese sprangletop and perhaps other weeds in aerobic rice system. 2014 Non-Indexed Article NonPeerReviewed Tse Seng Chuah and Md Zain Norhafizah and Sahid Ismail (2014) Phytotoxic effects of the extracts and compounds isolated from napiergrass (pennisetum purpureum) on Chinese sprangletop (leptochloa chinensis) germination and seedling growth in aerobic rice systems. Weed science, 62 (3). pp. 457-467. ISSN 1550-2759 http://www.wssajournals.org/doi/abs/10.1614/WS-D-13-00128.1
institution Universiti Malaysia Kelantan
building Perpustakaan Universiti Malaysia Kelantan
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Kelantan
content_source UMK Institutional Repository
url_provider http://umkeprints.umk.edu.my/
description Chinese sprangletop, a problematic weed in aerobic rice fields, has developed resistance to various groups of herbicides. In search of natural herbicides, the phytotoxic effects of napiergrass extracts on Chinese sprangletop were investigated. Phytotoxicity-directed extraction and fractionation of the culm plus leaves of napiergrass led to the isolation and identification of three major compounds: 2,4-di-tert-butylphenol (2,4-DTBP), cis-9-octadecenoic methyl ester (methyl oleate), and phthalic acid, mono-(2-ethylhexyl) ester (MEHP). These compounds showed different degrees of inhibition against the tested bioassay species. 2,4-DTBP was the most potent of the three compounds and completely inhibited the germination of Chinese sprangletop at the concentration of 0.5 g L−1, followed by MEHP, where 62% inhibition of germination was obtained. In contrast, methyl oleate showed only slight inhibition (< 10%) of germination. A soil bioassay further demonstrated that 2,4-DTBP is a strong inhibitor of root growth and completely prevented root growth of Chinese sprangletop at an application rate as low as 0.60 kg ai ha−1. Under aerobic conditions, 2,4-DTBP at 2.4 kg ai ha−1 reduced the emergence and shoot fresh weight of Chinese sprangletop by more than 60%, with negligible effect on root and shoot growth of aerobic rice seedlings, suggesting that 2.4 kg ai ha−1 2,4-DTBP is the most suitable rate to control Chinese sprangletop without injuring rice seedlings. Reduction in shoot height of rice plant was evident at 0 d after sowing across 2,4-DTBP rates. However, the rice plants became less susceptible with increasing growth stages. The present findings imply that 2,4-DTBP may potentially be developed as a PRE soil-applied natural herbicide for control of Chinese sprangletop and perhaps other weeds in aerobic rice system.
format Non-Indexed Article
author Tse Seng Chuah
Md Zain Norhafizah
Sahid Ismail
spellingShingle Tse Seng Chuah
Md Zain Norhafizah
Sahid Ismail
Phytotoxic effects of the extracts and compounds isolated from napiergrass (pennisetum purpureum) on Chinese sprangletop (leptochloa chinensis) germination and seedling growth in aerobic rice systems
author_facet Tse Seng Chuah
Md Zain Norhafizah
Sahid Ismail
author_sort Tse Seng Chuah
title Phytotoxic effects of the extracts and compounds isolated from napiergrass (pennisetum purpureum) on Chinese sprangletop (leptochloa chinensis) germination and seedling growth in aerobic rice systems
title_short Phytotoxic effects of the extracts and compounds isolated from napiergrass (pennisetum purpureum) on Chinese sprangletop (leptochloa chinensis) germination and seedling growth in aerobic rice systems
title_full Phytotoxic effects of the extracts and compounds isolated from napiergrass (pennisetum purpureum) on Chinese sprangletop (leptochloa chinensis) germination and seedling growth in aerobic rice systems
title_fullStr Phytotoxic effects of the extracts and compounds isolated from napiergrass (pennisetum purpureum) on Chinese sprangletop (leptochloa chinensis) germination and seedling growth in aerobic rice systems
title_full_unstemmed Phytotoxic effects of the extracts and compounds isolated from napiergrass (pennisetum purpureum) on Chinese sprangletop (leptochloa chinensis) germination and seedling growth in aerobic rice systems
title_sort phytotoxic effects of the extracts and compounds isolated from napiergrass (pennisetum purpureum) on chinese sprangletop (leptochloa chinensis) germination and seedling growth in aerobic rice systems
publishDate 2014
url http://discol.umk.edu.my/id/eprint/8107/
http://www.wssajournals.org/doi/abs/10.1614/WS-D-13-00128.1
_version_ 1763303936753664000
score 13.211869

Similar Items