Suppressive activity of volatile fatty acids and aromatic carboxylic acids on the germination of Monochoria vaginalis

Rice bran application is practically used by Japanese organic rice farmers as a common measure in controlling Monochoria vaginalis, a known weed in organic rice production. To elucidate the inhibitory mechanisms of rice bran application on M. vaginalis germination, we focused on volatile fatty acids...

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Autores principales:	Junko Tazawa, Daisuke Aoki, Hiroshi Hayakawa, Ken-ichi Matsushima, Takuhito Nozoe, Akira Uchino, Shigenori Miura
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2021
Materias:	monochoria vaginalis rice bran volatile fatty acids aromatic carboxylic acids organic rice production Plant culture SB1-1110
Acceso en línea:	https://doaj.org/article/2f1fdd62a7874247bd7f46ed9e4fdbfe
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spelling	oai:doaj.org-article:2f1fdd62a7874247bd7f46ed9e4fdbfe2021-11-26T11:19:47ZSuppressive activity of volatile fatty acids and aromatic carboxylic acids on the germination of Monochoria vaginalis1343-943X1349-100810.1080/1343943X.2021.1896953https://doaj.org/article/2f1fdd62a7874247bd7f46ed9e4fdbfe2021-10-01T00:00:00Zhttp://dx.doi.org/10.1080/1343943X.2021.1896953https://doaj.org/toc/1343-943Xhttps://doaj.org/toc/1349-1008Rice bran application is practically used by Japanese organic rice farmers as a common measure in controlling Monochoria vaginalis, a known weed in organic rice production. To elucidate the inhibitory mechanisms of rice bran application on M. vaginalis germination, we focused on volatile fatty acids (VFAs) and aromatic carboxylic acids (ACAs) as organic acids produced through rice bran decomposition in the soil, which can possibly suppress M. vaginalis germination. Both solo solutions of 1 mM VFAs (propionic or isobutyric acid) and 0.2 mM ACAs (3-phenylpropionic or 4-phenylbutyric acid) exhibited M. vaginalis germination suppression, especially at pH 4.6, the lowest pH tested. In the 0.5–3 mM VFA solutions at pH 4.6, germination was strongly suppressed in the order of isobutyric > propionic > butyric > acetic acid. With the 0.05–0.2 mM ACA solutions at pH 4.6, the germination was strongly suppressed in the order of 3-phenylpropionic > 4-phenylbutyric > 2-phenylpropionic acid. Benzoic acid did not exhibit significant germination suppression. The solutions of 0.5 mM VFAs and 0.05 mM ACAs exhibited no suppression when applied separately; however, the certain mixture of a VFA and an ACA at the aforementioned concentration, for example, 0.5 mM isobutyric acid and 0.05 mM 3-phenylpropionic acid, exhibited significant germination suppression. These results showed the several combinations of VFAs and ACAs at even non-effective concentrations synergistically suppressed M. vaginalis germination. Abbreviations:2PPA: 2-phenylpropionic acid; 3PPA: 3-phenylpropionic acid; 4PBA: 4-phenylbutyric acid; ACA: aromatic carboxylic acid; EC: electrical conductivity; M. vaginalis: Monochoria vaginalis; VFA: volatile fatty acidJunko TazawaDaisuke AokiHiroshi HayakawaKen-ichi MatsushimaTakuhito NozoeAkira UchinoShigenori MiuraTaylor & Francis Grouparticlemonochoria vaginalisrice branvolatile fatty acidsaromatic carboxylic acidsorganic rice productionPlant cultureSB1-1110ENPlant Production Science, Vol 24, Iss 4, Pp 505-511 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	monochoria vaginalis rice bran volatile fatty acids aromatic carboxylic acids organic rice production Plant culture SB1-1110
spellingShingle	monochoria vaginalis rice bran volatile fatty acids aromatic carboxylic acids organic rice production Plant culture SB1-1110 Junko Tazawa Daisuke Aoki Hiroshi Hayakawa Ken-ichi Matsushima Takuhito Nozoe Akira Uchino Shigenori Miura Suppressive activity of volatile fatty acids and aromatic carboxylic acids on the germination of Monochoria vaginalis
description	Rice bran application is practically used by Japanese organic rice farmers as a common measure in controlling Monochoria vaginalis, a known weed in organic rice production. To elucidate the inhibitory mechanisms of rice bran application on M. vaginalis germination, we focused on volatile fatty acids (VFAs) and aromatic carboxylic acids (ACAs) as organic acids produced through rice bran decomposition in the soil, which can possibly suppress M. vaginalis germination. Both solo solutions of 1 mM VFAs (propionic or isobutyric acid) and 0.2 mM ACAs (3-phenylpropionic or 4-phenylbutyric acid) exhibited M. vaginalis germination suppression, especially at pH 4.6, the lowest pH tested. In the 0.5–3 mM VFA solutions at pH 4.6, germination was strongly suppressed in the order of isobutyric > propionic > butyric > acetic acid. With the 0.05–0.2 mM ACA solutions at pH 4.6, the germination was strongly suppressed in the order of 3-phenylpropionic > 4-phenylbutyric > 2-phenylpropionic acid. Benzoic acid did not exhibit significant germination suppression. The solutions of 0.5 mM VFAs and 0.05 mM ACAs exhibited no suppression when applied separately; however, the certain mixture of a VFA and an ACA at the aforementioned concentration, for example, 0.5 mM isobutyric acid and 0.05 mM 3-phenylpropionic acid, exhibited significant germination suppression. These results showed the several combinations of VFAs and ACAs at even non-effective concentrations synergistically suppressed M. vaginalis germination. Abbreviations:2PPA: 2-phenylpropionic acid; 3PPA: 3-phenylpropionic acid; 4PBA: 4-phenylbutyric acid; ACA: aromatic carboxylic acid; EC: electrical conductivity; M. vaginalis: Monochoria vaginalis; VFA: volatile fatty acid
format	article
author	Junko Tazawa Daisuke Aoki Hiroshi Hayakawa Ken-ichi Matsushima Takuhito Nozoe Akira Uchino Shigenori Miura
author_facet	Junko Tazawa Daisuke Aoki Hiroshi Hayakawa Ken-ichi Matsushima Takuhito Nozoe Akira Uchino Shigenori Miura
author_sort	Junko Tazawa
title	Suppressive activity of volatile fatty acids and aromatic carboxylic acids on the germination of Monochoria vaginalis
title_short	Suppressive activity of volatile fatty acids and aromatic carboxylic acids on the germination of Monochoria vaginalis
title_full	Suppressive activity of volatile fatty acids and aromatic carboxylic acids on the germination of Monochoria vaginalis
title_fullStr	Suppressive activity of volatile fatty acids and aromatic carboxylic acids on the germination of Monochoria vaginalis
title_full_unstemmed	Suppressive activity of volatile fatty acids and aromatic carboxylic acids on the germination of Monochoria vaginalis
title_sort	suppressive activity of volatile fatty acids and aromatic carboxylic acids on the germination of monochoria vaginalis
publisher	Taylor & Francis Group
publishDate	2021
url	https://doaj.org/article/2f1fdd62a7874247bd7f46ed9e4fdbfe
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Suppressive activity of volatile fatty acids and aromatic carboxylic acids on the germination of Monochoria vaginalis

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