Response of Digitaria insularis seed germination to environmental factors

Response of Digitaria insularis seed germination to environmental factors

Digitaria insularis (sourgrass) is a weed problem emerging in importance in agricultural fields from the north of Argentina and has recently been reported as resistant to glyphosate. Understanding the germination of local biotypes of D. insularis could help to reduce invasion and improve the long-term management strategies for this weed. The objective of this work was to study the effect of environmental factors on germination of D. insularis seeds from two different populations of Argentina. Three experiments were performed in germination chambers by using recently dispersed seeds. Seeds with or without pre - chilling treatments had 95% germination, suggesting the absence of dormancy in freshly harvested seed. Germination at constant temperature of 25ºC was ~ 55% lower than germination at fluctuating temperature of 20ºC - 35ºC. At constant 25ºC, germination was higher for seeds from Santiago del Estero than seeds from Córdoba, and as the number of hydration dehydration cycles increased. Germination was reduced with exposure to far - red light for 1 h. Any crop management decision that reduces soil thermal fluctuations and/or far - red : red ratio (such as stubble or cover crops) could reduce seedling field emergence for this species.

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Main Authors: Oreja, Fernando Hugo, De la Fuente, Elba Beatriz, Fernández Duvivier, María Eugenia
Format: Texto biblioteca
Language:eng
Subjects:ENVIRONMENTAL FACTORS, GRASS WEED, MANAGEMENT DECISIONS, SEEDLING EMERGENCE, SEED ORIGIN,
Online Access:http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=45615
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spelling KOHA-OAI-AGRO:456152023-10-17T09:51:44Zhttp://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=45615http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=AAGResponse of Digitaria insularis seed germination to environmental factorsOreja, Fernando HugoDe la Fuente, Elba BeatrizFernández Duvivier, María Eugeniatextengapplication/pdfDigitaria insularis (sourgrass) is a weed problem emerging in importance in agricultural fields from the north of Argentina and has recently been reported as resistant to glyphosate. Understanding the germination of local biotypes of D. insularis could help to reduce invasion and improve the long-term management strategies for this weed. The objective of this work was to study the effect of environmental factors on germination of D. insularis seeds from two different populations of Argentina. Three experiments were performed in germination chambers by using recently dispersed seeds. Seeds with or without pre - chilling treatments had 95% germination, suggesting the absence of dormancy in freshly harvested seed. Germination at constant temperature of 25ºC was ~ 55% lower than germination at fluctuating temperature of 20ºC - 35ºC. At constant 25ºC, germination was higher for seeds from Santiago del Estero than seeds from Córdoba, and as the number of hydration dehydration cycles increased. Germination was reduced with exposure to far - red light for 1 h. Any crop management decision that reduces soil thermal fluctuations and/or far - red : red ratio (such as stubble or cover crops) could reduce seedling field emergence for this species.Digitaria insularis (sourgrass) is a weed problem emerging in importance in agricultural fields from the north of Argentina and has recently been reported as resistant to glyphosate. Understanding the germination of local biotypes of D. insularis could help to reduce invasion and improve the long-term management strategies for this weed. The objective of this work was to study the effect of environmental factors on germination of D. insularis seeds from two different populations of Argentina. Three experiments were performed in germination chambers by using recently dispersed seeds. Seeds with or without pre - chilling treatments had 95% germination, suggesting the absence of dormancy in freshly harvested seed. Germination at constant temperature of 25ºC was ~ 55% lower than germination at fluctuating temperature of 20ºC - 35ºC. At constant 25ºC, germination was higher for seeds from Santiago del Estero than seeds from Córdoba, and as the number of hydration dehydration cycles increased. Germination was reduced with exposure to far - red light for 1 h. Any crop management decision that reduces soil thermal fluctuations and/or far - red : red ratio (such as stubble or cover crops) could reduce seedling field emergence for this species.ENVIRONMENTAL FACTORSGRASS WEEDMANAGEMENT DECISIONSSEEDLING EMERGENCESEED ORIGINCrop and pasture science
institution UBA FA
collection Koha
country Argentina
countrycode AR
component Bibliográfico
access En linea
En linea
databasecode cat-ceiba
tag biblioteca
region America del Sur
libraryname Biblioteca Central FAUBA
language eng
topic ENVIRONMENTAL FACTORS
GRASS WEED
MANAGEMENT DECISIONS
SEEDLING EMERGENCE
SEED ORIGIN
ENVIRONMENTAL FACTORS
GRASS WEED
MANAGEMENT DECISIONS
SEEDLING EMERGENCE
SEED ORIGIN
spellingShingle ENVIRONMENTAL FACTORS
GRASS WEED
MANAGEMENT DECISIONS
SEEDLING EMERGENCE
SEED ORIGIN
ENVIRONMENTAL FACTORS
GRASS WEED
MANAGEMENT DECISIONS
SEEDLING EMERGENCE
SEED ORIGIN
Oreja, Fernando Hugo
De la Fuente, Elba Beatriz
Fernández Duvivier, María Eugenia
Response of Digitaria insularis seed germination to environmental factors
description Digitaria insularis (sourgrass) is a weed problem emerging in importance in agricultural fields from the north of Argentina and has recently been reported as resistant to glyphosate. Understanding the germination of local biotypes of D. insularis could help to reduce invasion and improve the long-term management strategies for this weed. The objective of this work was to study the effect of environmental factors on germination of D. insularis seeds from two different populations of Argentina. Three experiments were performed in germination chambers by using recently dispersed seeds. Seeds with or without pre - chilling treatments had 95% germination, suggesting the absence of dormancy in freshly harvested seed. Germination at constant temperature of 25ºC was ~ 55% lower than germination at fluctuating temperature of 20ºC - 35ºC. At constant 25ºC, germination was higher for seeds from Santiago del Estero than seeds from Córdoba, and as the number of hydration dehydration cycles increased. Germination was reduced with exposure to far - red light for 1 h. Any crop management decision that reduces soil thermal fluctuations and/or far - red : red ratio (such as stubble or cover crops) could reduce seedling field emergence for this species.
format Texto
topic_facet ENVIRONMENTAL FACTORS
GRASS WEED
MANAGEMENT DECISIONS
SEEDLING EMERGENCE
SEED ORIGIN
author Oreja, Fernando Hugo
De la Fuente, Elba Beatriz
Fernández Duvivier, María Eugenia
author_facet Oreja, Fernando Hugo
De la Fuente, Elba Beatriz
Fernández Duvivier, María Eugenia
author_sort Oreja, Fernando Hugo
title Response of Digitaria insularis seed germination to environmental factors
title_short Response of Digitaria insularis seed germination to environmental factors
title_full Response of Digitaria insularis seed germination to environmental factors
title_fullStr Response of Digitaria insularis seed germination to environmental factors
title_full_unstemmed Response of Digitaria insularis seed germination to environmental factors
title_sort response of digitaria insularis seed germination to environmental factors
url http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=45615
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