Cytogenetic analysis of wheat seeds submitted to artificial aging stress
Several studies have been developed to understand the physiology of seed deterioration, however, the initial steps of the deterioration process are not completely clear. Seed vigor and viability losses are also associated with genetic material damage. This study was carried out to detect cytogenetic...
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Associação Brasileira de Tecnologia de Sementes
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doaj-3fb1cb292bc04df38d7fd4b66ef47e882020-11-25T02:17:33ZengAssociação Brasileira de Tecnologia de SementesJournal of Seed Science2317-15372317-15453617178S2317-15372014000100009Cytogenetic analysis of wheat seeds submitted to artificial aging stressVanessa Ocom Menezes0Sidinei Jose Lopes1Solange Bosio Tedesco2Fernando Augusto Henning3Humberto Davi Zen4Liliane Marcia Mertz5Universidade Federal de Santa MariaUniversidade Federal de Santa MariaUniversidade Federal de Santa MariaEmbrapa SojaUniversidade Federal de Santa MariaEmbrapa SojaSeveral studies have been developed to understand the physiology of seed deterioration, however, the initial steps of the deterioration process are not completely clear. Seed vigor and viability losses are also associated with genetic material damage. This study was carried out to detect cytogenetic and physiological alterations occurring during the deterioration process of wheat seeds, due to artificial aging stress. Two cultivars, Ônix and Fundacep Campo Real, were submitted to six different treatments: control (T1), 24 (T2), 48 (T3), 72 (T4), 96 (T5) and 120 (T6) hours under artificial aging conditions: 42 °C and 100% relative humidity. Germination and vigor tests (First Count of Germination, Electrical Conductivity, Seedling Emergence in the Field and Emergence Speed Index) were performed. Cytogenetic evaluations were performed through smear technique for root tips, stained with 2% acetic orcein. Total number of cells under division and mitotic index (MI) were determined. According to results, vigor and mitotic index were affected due to deterioration process induced by artificial aging stress. A reduced number of dividing cells were observed in seeds submitted to prolonged period of aging. Chromosomal abnormalities in mitotic cells of aged seeds were detected with the occurrence of micronuclei, chromosome breaks and bridges.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-15372014000100009&lng=en&tlng=enchromosomal abnormalitiesmitotic indexseed deteriorationtriticum aestivumartificial aging stress |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Vanessa Ocom Menezes Sidinei Jose Lopes Solange Bosio Tedesco Fernando Augusto Henning Humberto Davi Zen Liliane Marcia Mertz |
spellingShingle |
Vanessa Ocom Menezes Sidinei Jose Lopes Solange Bosio Tedesco Fernando Augusto Henning Humberto Davi Zen Liliane Marcia Mertz Cytogenetic analysis of wheat seeds submitted to artificial aging stress Journal of Seed Science chromosomal abnormalities mitotic index seed deterioration triticum aestivum artificial aging stress |
author_facet |
Vanessa Ocom Menezes Sidinei Jose Lopes Solange Bosio Tedesco Fernando Augusto Henning Humberto Davi Zen Liliane Marcia Mertz |
author_sort |
Vanessa Ocom Menezes |
title |
Cytogenetic analysis of wheat seeds submitted to artificial aging stress |
title_short |
Cytogenetic analysis of wheat seeds submitted to artificial aging stress |
title_full |
Cytogenetic analysis of wheat seeds submitted to artificial aging stress |
title_fullStr |
Cytogenetic analysis of wheat seeds submitted to artificial aging stress |
title_full_unstemmed |
Cytogenetic analysis of wheat seeds submitted to artificial aging stress |
title_sort |
cytogenetic analysis of wheat seeds submitted to artificial aging stress |
publisher |
Associação Brasileira de Tecnologia de Sementes |
series |
Journal of Seed Science |
issn |
2317-1537 2317-1545 |
description |
Several studies have been developed to understand the physiology of seed deterioration, however, the initial steps of the deterioration process are not completely clear. Seed vigor and viability losses are also associated with genetic material damage. This study was carried out to detect cytogenetic and physiological alterations occurring during the deterioration process of wheat seeds, due to artificial aging stress. Two cultivars, Ônix and Fundacep Campo Real, were submitted to six different treatments: control (T1), 24 (T2), 48 (T3), 72 (T4), 96 (T5) and 120 (T6) hours under artificial aging conditions: 42 °C and 100% relative humidity. Germination and vigor tests (First Count of Germination, Electrical Conductivity, Seedling Emergence in the Field and Emergence Speed Index) were performed. Cytogenetic evaluations were performed through smear technique for root tips, stained with 2% acetic orcein. Total number of cells under division and mitotic index (MI) were determined. According to results, vigor and mitotic index were affected due to deterioration process induced by artificial aging stress. A reduced number of dividing cells were observed in seeds submitted to prolonged period of aging. Chromosomal abnormalities in mitotic cells of aged seeds were detected with the occurrence of micronuclei, chromosome breaks and bridges. |
topic |
chromosomal abnormalities mitotic index seed deterioration triticum aestivum artificial aging stress |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-15372014000100009&lng=en&tlng=en |
work_keys_str_mv |
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1724885722398195712 |