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Germination ecology of Chloris truncata and its implication for weed management

Chloris truncata is a significant weed in summer crops in the subtropical region of Australia. A study was conducted to evaluate the effect of environmental factors on germination and emergence of two populations of C. truncata. Overall, germination was not affected by the populations. Seeds germina...

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Autores principales: Chauhan, Bhagirath Singh, Manalil, Sudheesh, Florentine, Singarayer, Jha, Prashant
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6037353/
https://www.ncbi.nlm.nih.gov/pubmed/29985944
http://dx.doi.org/10.1371/journal.pone.0199949
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author Chauhan, Bhagirath Singh
Manalil, Sudheesh
Florentine, Singarayer
Jha, Prashant
author_facet Chauhan, Bhagirath Singh
Manalil, Sudheesh
Florentine, Singarayer
Jha, Prashant
author_sort Chauhan, Bhagirath Singh
collection PubMed
description Chloris truncata is a significant weed in summer crops in the subtropical region of Australia. A study was conducted to evaluate the effect of environmental factors on germination and emergence of two populations of C. truncata. Overall, germination was not affected by the populations. Seeds germinated at a wide range of alternating day/night temperatures, suggesting that seeds can germinate throughout the spring, winter and autumn seasons. Seed germination was stimulated by the presence of light; however, 51 to 71% of these seeds still germinated in the dark. The sodium chloride concentration and osmotic potential required to inhibit germination of 50% of the population were 179 mM and -0.52 MPa, respectively. A high proportion of seeds germinated over a wide pH range (4 to 10). Seeds placed on the soil surface had greatest germination (67%) and a burial depth of 3 cm resulted in complete inhibition of emergence. The sorghum residue amount required to reduce emergence by 50% was 1.8 t ha(-1). The results suggest that, although this weed will be favored in no-till systems, residue retention on the soil surface will help in reducing its infestation. Seed bank buildup can be managed by burying seeds below the depth of emergence.
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spelling pubmed-60373532018-07-19 Germination ecology of Chloris truncata and its implication for weed management Chauhan, Bhagirath Singh Manalil, Sudheesh Florentine, Singarayer Jha, Prashant PLoS One Research Article Chloris truncata is a significant weed in summer crops in the subtropical region of Australia. A study was conducted to evaluate the effect of environmental factors on germination and emergence of two populations of C. truncata. Overall, germination was not affected by the populations. Seeds germinated at a wide range of alternating day/night temperatures, suggesting that seeds can germinate throughout the spring, winter and autumn seasons. Seed germination was stimulated by the presence of light; however, 51 to 71% of these seeds still germinated in the dark. The sodium chloride concentration and osmotic potential required to inhibit germination of 50% of the population were 179 mM and -0.52 MPa, respectively. A high proportion of seeds germinated over a wide pH range (4 to 10). Seeds placed on the soil surface had greatest germination (67%) and a burial depth of 3 cm resulted in complete inhibition of emergence. The sorghum residue amount required to reduce emergence by 50% was 1.8 t ha(-1). The results suggest that, although this weed will be favored in no-till systems, residue retention on the soil surface will help in reducing its infestation. Seed bank buildup can be managed by burying seeds below the depth of emergence. Public Library of Science 2018-07-09 /pmc/articles/PMC6037353/ /pubmed/29985944 http://dx.doi.org/10.1371/journal.pone.0199949 Text en © 2018 Chauhan et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Chauhan, Bhagirath Singh
Manalil, Sudheesh
Florentine, Singarayer
Jha, Prashant
Germination ecology of Chloris truncata and its implication for weed management
title Germination ecology of Chloris truncata and its implication for weed management
title_full Germination ecology of Chloris truncata and its implication for weed management
title_fullStr Germination ecology of Chloris truncata and its implication for weed management
title_full_unstemmed Germination ecology of Chloris truncata and its implication for weed management
title_short Germination ecology of Chloris truncata and its implication for weed management
title_sort germination ecology of chloris truncata and its implication for weed management
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6037353/
https://www.ncbi.nlm.nih.gov/pubmed/29985944
http://dx.doi.org/10.1371/journal.pone.0199949
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