GERMINATION OF CACTUS SEEDS UNDER SALINE STRESS
Autor(a) principal: | |
---|---|
Data de Publicação: | 2021 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Revista Caatinga |
Texto Completo: | https://periodicos.ufersa.edu.br/caatinga/article/view/10576 |
Resumo: | Cactus seeds in seasonal dry tropical forests are subject to several stressors, such as salt stress which limits imbibition and therefore germination. Thus, this study aimed to compare germination performance of Cereus jamacaru subsp. jamacaru and Pilosocereus pachycladus subsp. pernambucoensis seeds under salinity conditions. To this end, NaCl and KCl solutions were used in the following osmotic potentials: 0.0 (control), -0.2, -0.4, -0.6, -0.8, -1.0, and -1.2 MPa. Seeds were placed to germinate at 25 °C and 12-hour photoperiod. The number of germinated seeds was counted daily for 21 days after root protrusion. The variables analyzed were: water content, germination, normal seedlings, germination speed index, and average germination time. The experimental design was completely randomized, following a 2 × 7 factorial scheme (species × osmotic potential) for each saline source. Water restriction and ionic effect caused by salts favored seed germination and vigor in both species at -0.2 and -0.4 MPa. However, from -0.8 MPa onwards, germination decreased significantly for both salts. Seeds of C. jamacaru subsp. jamacaru and P. pachycladus subsp. pernambucoensis were tolerant to salt stress since they germinated up to -0.8 MPa (NaCl) and -1.2 MPa (KCl). The latter occurred only for P. pachycladus subsp. pernambucoensis. |
id |
UFERSA-1_18219297a2ca91b16d8e2e028110549f |
---|---|
oai_identifier_str |
oai:ojs.periodicos.ufersa.edu.br:article/10576 |
network_acronym_str |
UFERSA-1 |
network_name_str |
Revista Caatinga |
repository_id_str |
|
spelling |
GERMINATION OF CACTUS SEEDS UNDER SALINE STRESSGERMINAÇÃO DE SEMENTES DE CACTÁCEAS SOB ESTRESSE SALINOCaatinga. Cereus jamacaru. Pilosocereus pachycladus. Salinidade. Vigor.Caatinga. Cereus jamacaru. Pilosocereus pachycladus. Salinity. Vigor.Cactus seeds in seasonal dry tropical forests are subject to several stressors, such as salt stress which limits imbibition and therefore germination. Thus, this study aimed to compare germination performance of Cereus jamacaru subsp. jamacaru and Pilosocereus pachycladus subsp. pernambucoensis seeds under salinity conditions. To this end, NaCl and KCl solutions were used in the following osmotic potentials: 0.0 (control), -0.2, -0.4, -0.6, -0.8, -1.0, and -1.2 MPa. Seeds were placed to germinate at 25 °C and 12-hour photoperiod. The number of germinated seeds was counted daily for 21 days after root protrusion. The variables analyzed were: water content, germination, normal seedlings, germination speed index, and average germination time. The experimental design was completely randomized, following a 2 × 7 factorial scheme (species × osmotic potential) for each saline source. Water restriction and ionic effect caused by salts favored seed germination and vigor in both species at -0.2 and -0.4 MPa. However, from -0.8 MPa onwards, germination decreased significantly for both salts. Seeds of C. jamacaru subsp. jamacaru and P. pachycladus subsp. pernambucoensis were tolerant to salt stress since they germinated up to -0.8 MPa (NaCl) and -1.2 MPa (KCl). The latter occurred only for P. pachycladus subsp. pernambucoensis. As sementes de cactáceas que ocorrem em florestas tropicais sazonais secas estão sujeitas a múltiplos estresses, a exemplo do estresse salino, que limita a embebição e, consequentemente a germinação. Assim, objetivou-se comparar o desempenho germinativo de sementes de Cereus jamacaru subsp. jamacaru e Pilosocereus pachycladus subsp. pernambucoensis em condições de salinidade. Para isso, utilizou-se soluções de NaCl e KCl nos seguintes potenciais osmóticos: 0,0 (controle); -0,2; -0,4; -0,6; -0,8; -1,0 e -1,2 MPa. As sementes foram colocadas para germinar sob a temperatura de 25 °C e fotoperíodo de 12 horas. A contagem do número de sementes germinadas foi realizada diariamente durante 21 dias após a protrusão radicular. As variáveis analisadas foram: teor de água, germinação, plântulas normais, índice de velocidade de germinação e tempo médio de germinação. O delineamento foi inteiramente casualizado seguindo o esquema fatorial de 2 × 7 (espécie × potencial osmótico) para cada fonte salina. A restrição hídrica e o efeito iônico causados pelos sais favoreceram a germinação e o vigor das sementes de ambas as espécies nos potenciais osmóticos de -0,2 e -0,4 MPa, entretanto, a partir de -0,8 MPa houve diminuição expressiva da germinação nos dois sais. As sementes de C. jamacaru subsp. jamacaru e P. pachycladus subsp. pernambucoensis foram tolerantes ao estresse salino, pois conseguiram germinar em potenciais de até -0,8 MPa (NaCl) e -1,2 MPa (KCl), este último, apenas no caso do P. pachycladus subsp. pernambucoensis. Universidade Federal Rural do Semi-Árido2021-12-22info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufersa.edu.br/caatinga/article/view/1057610.1590/1983-21252022v35n108rcREVISTA CAATINGA; Vol. 35 No. 1 (2022); 79-86Revista Caatinga; v. 35 n. 1 (2022); 79-861983-21250100-316Xreponame:Revista Caatingainstname:Universidade Federal Rural do Semi-Árido (UFERSA)instacron:UFERSAenghttps://periodicos.ufersa.edu.br/caatinga/article/view/10576/10819Copyright (c) 2021 Revista Caatingainfo:eu-repo/semantics/openAccessSilva, João Henrique Constantino SalesAzerêdo, Gilvaneide Alves de 2023-07-03T18:23:12Zoai:ojs.periodicos.ufersa.edu.br:article/10576Revistahttps://periodicos.ufersa.edu.br/index.php/caatinga/indexPUBhttps://periodicos.ufersa.edu.br/index.php/caatinga/oaipatricio@ufersa.edu.br|| caatinga@ufersa.edu.br1983-21250100-316Xopendoar:2024-04-29T09:46:57.349945Revista Caatinga - Universidade Federal Rural do Semi-Árido (UFERSA)true |
dc.title.none.fl_str_mv |
GERMINATION OF CACTUS SEEDS UNDER SALINE STRESS GERMINAÇÃO DE SEMENTES DE CACTÁCEAS SOB ESTRESSE SALINO |
title |
GERMINATION OF CACTUS SEEDS UNDER SALINE STRESS |
spellingShingle |
GERMINATION OF CACTUS SEEDS UNDER SALINE STRESS Silva, João Henrique Constantino Sales Caatinga. Cereus jamacaru. Pilosocereus pachycladus. Salinidade. Vigor. Caatinga. Cereus jamacaru. Pilosocereus pachycladus. Salinity. Vigor. |
title_short |
GERMINATION OF CACTUS SEEDS UNDER SALINE STRESS |
title_full |
GERMINATION OF CACTUS SEEDS UNDER SALINE STRESS |
title_fullStr |
GERMINATION OF CACTUS SEEDS UNDER SALINE STRESS |
title_full_unstemmed |
GERMINATION OF CACTUS SEEDS UNDER SALINE STRESS |
title_sort |
GERMINATION OF CACTUS SEEDS UNDER SALINE STRESS |
author |
Silva, João Henrique Constantino Sales |
author_facet |
Silva, João Henrique Constantino Sales Azerêdo, Gilvaneide Alves de |
author_role |
author |
author2 |
Azerêdo, Gilvaneide Alves de |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Silva, João Henrique Constantino Sales Azerêdo, Gilvaneide Alves de |
dc.subject.por.fl_str_mv |
Caatinga. Cereus jamacaru. Pilosocereus pachycladus. Salinidade. Vigor. Caatinga. Cereus jamacaru. Pilosocereus pachycladus. Salinity. Vigor. |
topic |
Caatinga. Cereus jamacaru. Pilosocereus pachycladus. Salinidade. Vigor. Caatinga. Cereus jamacaru. Pilosocereus pachycladus. Salinity. Vigor. |
description |
Cactus seeds in seasonal dry tropical forests are subject to several stressors, such as salt stress which limits imbibition and therefore germination. Thus, this study aimed to compare germination performance of Cereus jamacaru subsp. jamacaru and Pilosocereus pachycladus subsp. pernambucoensis seeds under salinity conditions. To this end, NaCl and KCl solutions were used in the following osmotic potentials: 0.0 (control), -0.2, -0.4, -0.6, -0.8, -1.0, and -1.2 MPa. Seeds were placed to germinate at 25 °C and 12-hour photoperiod. The number of germinated seeds was counted daily for 21 days after root protrusion. The variables analyzed were: water content, germination, normal seedlings, germination speed index, and average germination time. The experimental design was completely randomized, following a 2 × 7 factorial scheme (species × osmotic potential) for each saline source. Water restriction and ionic effect caused by salts favored seed germination and vigor in both species at -0.2 and -0.4 MPa. However, from -0.8 MPa onwards, germination decreased significantly for both salts. Seeds of C. jamacaru subsp. jamacaru and P. pachycladus subsp. pernambucoensis were tolerant to salt stress since they germinated up to -0.8 MPa (NaCl) and -1.2 MPa (KCl). The latter occurred only for P. pachycladus subsp. pernambucoensis. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-12-22 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.ufersa.edu.br/caatinga/article/view/10576 10.1590/1983-21252022v35n108rc |
url |
https://periodicos.ufersa.edu.br/caatinga/article/view/10576 |
identifier_str_mv |
10.1590/1983-21252022v35n108rc |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://periodicos.ufersa.edu.br/caatinga/article/view/10576/10819 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2021 Revista Caatinga info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2021 Revista Caatinga |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal Rural do Semi-Árido |
publisher.none.fl_str_mv |
Universidade Federal Rural do Semi-Árido |
dc.source.none.fl_str_mv |
REVISTA CAATINGA; Vol. 35 No. 1 (2022); 79-86 Revista Caatinga; v. 35 n. 1 (2022); 79-86 1983-2125 0100-316X reponame:Revista Caatinga instname:Universidade Federal Rural do Semi-Árido (UFERSA) instacron:UFERSA |
instname_str |
Universidade Federal Rural do Semi-Árido (UFERSA) |
instacron_str |
UFERSA |
institution |
UFERSA |
reponame_str |
Revista Caatinga |
collection |
Revista Caatinga |
repository.name.fl_str_mv |
Revista Caatinga - Universidade Federal Rural do Semi-Árido (UFERSA) |
repository.mail.fl_str_mv |
patricio@ufersa.edu.br|| caatinga@ufersa.edu.br |
_version_ |
1797674029515014144 |