Cotton Germination and Emergence under High Diurnal Temperatures
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.2135/cropsci2017.03.0182 http://hdl.handle.net/11449/163256 |
Resumo: | In tropical climates, high soil temperatures during the cotton (Gossypium hirsutum L.) planting season impair seed germination and plant emergence, resulting in poor stand establishment. Under these conditions, the performance of cultivars presently in use is not known. The aim of this study was to evaluate germination and emergence of cotton cultivars under diurnal high temperature cycles without water restriction. Three experiments were conducted in germination chambers, testing six cotton cultivars and four diurnal cycles with maximum temperatures of 20, 30, 40, and 50 degrees C. The diurnal cycle with a maximum temperature of 30 degrees C resulted in the greatest germination and emergence rates. Under a maximum diurnal temperature of 40 degrees C, cultivars with higher seed weight were the least impaired, resulting in higher germination and emergence rates than cultivars with smaller seeds. There was a positive correlation between seed weight and seedling length (r = 0.57), as well as seedling dry weight (r = 0.56). The seeds of modern cultivars developed for tropical environments are tolerant to maximum daily temperatures up to 40 degrees C, which is higher than previously reported for older cultivars. However, seed exposure to a temperature of 50 degrees C for only 5.5 h is enough to impair the germination and prevent emergence. The correlation between seed weight and seedling dry weight is positive and greater as the temperature increases or decreases from 30 degrees C, showing that the initial seed weight is determinant for the final seedling dry weight under temperatures departing from the optimal. |
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Cotton Germination and Emergence under High Diurnal TemperaturesIn tropical climates, high soil temperatures during the cotton (Gossypium hirsutum L.) planting season impair seed germination and plant emergence, resulting in poor stand establishment. Under these conditions, the performance of cultivars presently in use is not known. The aim of this study was to evaluate germination and emergence of cotton cultivars under diurnal high temperature cycles without water restriction. Three experiments were conducted in germination chambers, testing six cotton cultivars and four diurnal cycles with maximum temperatures of 20, 30, 40, and 50 degrees C. The diurnal cycle with a maximum temperature of 30 degrees C resulted in the greatest germination and emergence rates. Under a maximum diurnal temperature of 40 degrees C, cultivars with higher seed weight were the least impaired, resulting in higher germination and emergence rates than cultivars with smaller seeds. There was a positive correlation between seed weight and seedling length (r = 0.57), as well as seedling dry weight (r = 0.56). The seeds of modern cultivars developed for tropical environments are tolerant to maximum daily temperatures up to 40 degrees C, which is higher than previously reported for older cultivars. However, seed exposure to a temperature of 50 degrees C for only 5.5 h is enough to impair the germination and prevent emergence. The correlation between seed weight and seedling dry weight is positive and greater as the temperature increases or decreases from 30 degrees C, showing that the initial seed weight is determinant for the final seedling dry weight under temperatures departing from the optimal.Sao Paulo State Univ, Dept Crop Sci, Coll Agr Sci, Jose Barbosa de Barros St 1780, BR-18610307 Botucatu, SP, BrazilSao Paulo State Univ, Dept Crop Sci, Coll Agr Sci, Jose Barbosa de Barros St 1780, BR-18610307 Botucatu, SP, BrazilCrop Science Soc AmerUniversidade Estadual Paulista (Unesp)Raphael, Juan P. A. [UNESP]Gazola, Bruno [UNESP]Nunes, Jesion G. S. [UNESP]Macedo, Gabrielle C. [UNESP]Rosolem, Ciro A. [UNESP]2018-11-26T17:40:42Z2018-11-26T17:40:42Z2017-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article2761-2769http://dx.doi.org/10.2135/cropsci2017.03.0182Crop Science. Madison: Crop Science Soc Amer, v. 57, n. 5, p. 2761-2769, 2017.0011-183Xhttp://hdl.handle.net/11449/16325610.2135/cropsci2017.03.0182WOS:00041072890004457207758732595280000-0003-2001-0874Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengCrop Scienceinfo:eu-repo/semantics/openAccess2024-04-30T15:59:05Zoai:repositorio.unesp.br:11449/163256Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-04-30T15:59:05Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Cotton Germination and Emergence under High Diurnal Temperatures |
title |
Cotton Germination and Emergence under High Diurnal Temperatures |
spellingShingle |
Cotton Germination and Emergence under High Diurnal Temperatures Raphael, Juan P. A. [UNESP] |
title_short |
Cotton Germination and Emergence under High Diurnal Temperatures |
title_full |
Cotton Germination and Emergence under High Diurnal Temperatures |
title_fullStr |
Cotton Germination and Emergence under High Diurnal Temperatures |
title_full_unstemmed |
Cotton Germination and Emergence under High Diurnal Temperatures |
title_sort |
Cotton Germination and Emergence under High Diurnal Temperatures |
author |
Raphael, Juan P. A. [UNESP] |
author_facet |
Raphael, Juan P. A. [UNESP] Gazola, Bruno [UNESP] Nunes, Jesion G. S. [UNESP] Macedo, Gabrielle C. [UNESP] Rosolem, Ciro A. [UNESP] |
author_role |
author |
author2 |
Gazola, Bruno [UNESP] Nunes, Jesion G. S. [UNESP] Macedo, Gabrielle C. [UNESP] Rosolem, Ciro A. [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Raphael, Juan P. A. [UNESP] Gazola, Bruno [UNESP] Nunes, Jesion G. S. [UNESP] Macedo, Gabrielle C. [UNESP] Rosolem, Ciro A. [UNESP] |
description |
In tropical climates, high soil temperatures during the cotton (Gossypium hirsutum L.) planting season impair seed germination and plant emergence, resulting in poor stand establishment. Under these conditions, the performance of cultivars presently in use is not known. The aim of this study was to evaluate germination and emergence of cotton cultivars under diurnal high temperature cycles without water restriction. Three experiments were conducted in germination chambers, testing six cotton cultivars and four diurnal cycles with maximum temperatures of 20, 30, 40, and 50 degrees C. The diurnal cycle with a maximum temperature of 30 degrees C resulted in the greatest germination and emergence rates. Under a maximum diurnal temperature of 40 degrees C, cultivars with higher seed weight were the least impaired, resulting in higher germination and emergence rates than cultivars with smaller seeds. There was a positive correlation between seed weight and seedling length (r = 0.57), as well as seedling dry weight (r = 0.56). The seeds of modern cultivars developed for tropical environments are tolerant to maximum daily temperatures up to 40 degrees C, which is higher than previously reported for older cultivars. However, seed exposure to a temperature of 50 degrees C for only 5.5 h is enough to impair the germination and prevent emergence. The correlation between seed weight and seedling dry weight is positive and greater as the temperature increases or decreases from 30 degrees C, showing that the initial seed weight is determinant for the final seedling dry weight under temperatures departing from the optimal. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-09-01 2018-11-26T17:40:42Z 2018-11-26T17:40:42Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.2135/cropsci2017.03.0182 Crop Science. Madison: Crop Science Soc Amer, v. 57, n. 5, p. 2761-2769, 2017. 0011-183X http://hdl.handle.net/11449/163256 10.2135/cropsci2017.03.0182 WOS:000410728900044 5720775873259528 0000-0003-2001-0874 |
url |
http://dx.doi.org/10.2135/cropsci2017.03.0182 http://hdl.handle.net/11449/163256 |
identifier_str_mv |
Crop Science. Madison: Crop Science Soc Amer, v. 57, n. 5, p. 2761-2769, 2017. 0011-183X 10.2135/cropsci2017.03.0182 WOS:000410728900044 5720775873259528 0000-0003-2001-0874 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Crop Science |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
2761-2769 |
dc.publisher.none.fl_str_mv |
Crop Science Soc Amer |
publisher.none.fl_str_mv |
Crop Science Soc Amer |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799965570448228352 |