ESTRESSE SALINO E HÍDRICO NA GERMINAÇÃO E CRESCIMENTO INICIAL DE PLÂNTULAS DE Toona ciliata M. ROEM. var. australis

The Toona ciliata var. australis is a tree species which yields a very high-quality timber for furniture and is unaffected by Hypsipyla grandella, a pest that attacks monoculture plantations of native species similar to Toona ciliata. It has a close relationship with water availability, occurring mainly in humid forest in its natural habitat. In commercial plantations this is an important limitation to the establishment and initial growing of Toona ciliata. In the last decades, the use of Toona ciliata in commercial plantations has increased in Brazil, however, there is little knowledge about the effect of adverse environments on seed germination and early seedling growth. This study aimed to evaluate the effects of water and saline stress on germination and early seedlings growth of Toona ciliata. Osmotic solutions were prepared with, or NaCl, or PEG 6000, in the following osmotic potentials: -0.1; -0.2; -0.3; -0.4; -0.5; -0.6; -0.9; -1.2 and -1.5 MPa. For the control treatment, it was only used sterile water. The seeds were submitted to the germination test in which the germitest paper was moistened with the relative osmotic solution. The incubation was realized in a germination chamber at 25 ± 2 °C with 16 h light of photoperiod. The experimental design was completely randomized, arranged in a factorial design 2 × 10 (osmotic agent × osmotic potential and control), with four repetitions of 50 seeds each. With the reduction on the osmotic potential was observed lower germination, number of normal seedlings, fresh weight, seedling length and higher number of hard seeds, being the effect of PEG 6000 more severe. The germination and number of abnormal seedlings was higher under NaCl effect than PEG 6000. It can be concluded that germination and early seedling growth of Toona ciliata are affected by both saline and water stress, being more sensitive under water stress and with higher probability of developing abnormal seedlings under saline stress. Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Júlio Rieger Lucchese [verfasserIn] Marciéli Pitorini Bovolini [verfasserIn] Marcio Alberto Hilgert [verfasserIn] Carolina Brito Brose [verfasserIn] Eduarda Demari Avrella [verfasserIn] Marília Lazarotto [verfasserIn]

Format:	E-Artikel
Sprache:	Portugiesisch

Erschienen:	2018

Übergeordnetes Werk:	In: Ciência Florestal - Universidade Federal de Santa Maria, 2005, 28(2018), 1, Seite 141-149
Übergeordnetes Werk:	volume:28 ; year:2018 ; number:1 ; pages:141-149

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc Journal toc

DOI / URN:	10.5902/1980509831633

Katalog-ID:	DOAJ03807186X

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spelling	10.5902/1980509831633 doi (DE-627)DOAJ03807186X (DE-599)DOAJc6fb11715638433a872bcc738ce3a2cf DE-627 ger DE-627 rakwb por SD1-669.5 Júlio Rieger Lucchese verfasserin aut ESTRESSE SALINO E HÍDRICO NA GERMINAÇÃO E CRESCIMENTO INICIAL DE PLÂNTULAS DE Toona ciliata M. ROEM. var. australis 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Toona ciliata var. australis is a tree species which yields a very high-quality timber for furniture and is unaffected by Hypsipyla grandella, a pest that attacks monoculture plantations of native species similar to Toona ciliata. It has a close relationship with water availability, occurring mainly in humid forest in its natural habitat. In commercial plantations this is an important limitation to the establishment and initial growing of Toona ciliata. In the last decades, the use of Toona ciliata in commercial plantations has increased in Brazil, however, there is little knowledge about the effect of adverse environments on seed germination and early seedling growth. This study aimed to evaluate the effects of water and saline stress on germination and early seedlings growth of Toona ciliata. Osmotic solutions were prepared with, or NaCl, or PEG 6000, in the following osmotic potentials: -0.1; -0.2; -0.3; -0.4; -0.5; -0.6; -0.9; -1.2 and -1.5 MPa. For the control treatment, it was only used sterile water. The seeds were submitted to the germination test in which the germitest paper was moistened with the relative osmotic solution. The incubation was realized in a germination chamber at 25 ± 2 °C with 16 h light of photoperiod. The experimental design was completely randomized, arranged in a factorial design 2 × 10 (osmotic agent × osmotic potential and control), with four repetitions of 50 seeds each. With the reduction on the osmotic potential was observed lower germination, number of normal seedlings, fresh weight, seedling length and higher number of hard seeds, being the effect of PEG 6000 more severe. The germination and number of abnormal seedlings was higher under NaCl effect than PEG 6000. It can be concluded that germination and early seedling growth of Toona ciliata are affected by both saline and water stress, being more sensitive under water stress and with higher probability of developing abnormal seedlings under saline stress. Agriculture S Forestry Marciéli Pitorini Bovolini verfasserin aut Marcio Alberto Hilgert verfasserin aut Carolina Brito Brose verfasserin aut Eduarda Demari Avrella verfasserin aut Marília Lazarotto verfasserin aut In Ciência Florestal Universidade Federal de Santa Maria, 2005 28(2018), 1, Seite 141-149 (DE-627)491441525 (DE-600)2194052-6 19805098 nnns volume:28 year:2018 number:1 pages:141-149 https://doi.org/10.5902/1980509831633 kostenfrei https://doaj.org/article/c6fb11715638433a872bcc738ce3a2cf kostenfrei http://www.redalyc.org/articulo.oa?id=53455466013 kostenfrei https://doaj.org/toc/0103-9954 Journal toc kostenfrei https://doaj.org/toc/1980-5098 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 28 2018 1 141-149
allfields_unstemmed	10.5902/1980509831633 doi (DE-627)DOAJ03807186X (DE-599)DOAJc6fb11715638433a872bcc738ce3a2cf DE-627 ger DE-627 rakwb por SD1-669.5 Júlio Rieger Lucchese verfasserin aut ESTRESSE SALINO E HÍDRICO NA GERMINAÇÃO E CRESCIMENTO INICIAL DE PLÂNTULAS DE Toona ciliata M. ROEM. var. australis 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Toona ciliata var. australis is a tree species which yields a very high-quality timber for furniture and is unaffected by Hypsipyla grandella, a pest that attacks monoculture plantations of native species similar to Toona ciliata. It has a close relationship with water availability, occurring mainly in humid forest in its natural habitat. In commercial plantations this is an important limitation to the establishment and initial growing of Toona ciliata. In the last decades, the use of Toona ciliata in commercial plantations has increased in Brazil, however, there is little knowledge about the effect of adverse environments on seed germination and early seedling growth. This study aimed to evaluate the effects of water and saline stress on germination and early seedlings growth of Toona ciliata. Osmotic solutions were prepared with, or NaCl, or PEG 6000, in the following osmotic potentials: -0.1; -0.2; -0.3; -0.4; -0.5; -0.6; -0.9; -1.2 and -1.5 MPa. For the control treatment, it was only used sterile water. The seeds were submitted to the germination test in which the germitest paper was moistened with the relative osmotic solution. The incubation was realized in a germination chamber at 25 ± 2 °C with 16 h light of photoperiod. The experimental design was completely randomized, arranged in a factorial design 2 × 10 (osmotic agent × osmotic potential and control), with four repetitions of 50 seeds each. With the reduction on the osmotic potential was observed lower germination, number of normal seedlings, fresh weight, seedling length and higher number of hard seeds, being the effect of PEG 6000 more severe. The germination and number of abnormal seedlings was higher under NaCl effect than PEG 6000. It can be concluded that germination and early seedling growth of Toona ciliata are affected by both saline and water stress, being more sensitive under water stress and with higher probability of developing abnormal seedlings under saline stress. Agriculture S Forestry Marciéli Pitorini Bovolini verfasserin aut Marcio Alberto Hilgert verfasserin aut Carolina Brito Brose verfasserin aut Eduarda Demari Avrella verfasserin aut Marília Lazarotto verfasserin aut In Ciência Florestal Universidade Federal de Santa Maria, 2005 28(2018), 1, Seite 141-149 (DE-627)491441525 (DE-600)2194052-6 19805098 nnns volume:28 year:2018 number:1 pages:141-149 https://doi.org/10.5902/1980509831633 kostenfrei https://doaj.org/article/c6fb11715638433a872bcc738ce3a2cf kostenfrei http://www.redalyc.org/articulo.oa?id=53455466013 kostenfrei https://doaj.org/toc/0103-9954 Journal toc kostenfrei https://doaj.org/toc/1980-5098 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 28 2018 1 141-149
allfieldsGer	10.5902/1980509831633 doi (DE-627)DOAJ03807186X (DE-599)DOAJc6fb11715638433a872bcc738ce3a2cf DE-627 ger DE-627 rakwb por SD1-669.5 Júlio Rieger Lucchese verfasserin aut ESTRESSE SALINO E HÍDRICO NA GERMINAÇÃO E CRESCIMENTO INICIAL DE PLÂNTULAS DE Toona ciliata M. ROEM. var. australis 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Toona ciliata var. australis is a tree species which yields a very high-quality timber for furniture and is unaffected by Hypsipyla grandella, a pest that attacks monoculture plantations of native species similar to Toona ciliata. It has a close relationship with water availability, occurring mainly in humid forest in its natural habitat. In commercial plantations this is an important limitation to the establishment and initial growing of Toona ciliata. In the last decades, the use of Toona ciliata in commercial plantations has increased in Brazil, however, there is little knowledge about the effect of adverse environments on seed germination and early seedling growth. This study aimed to evaluate the effects of water and saline stress on germination and early seedlings growth of Toona ciliata. Osmotic solutions were prepared with, or NaCl, or PEG 6000, in the following osmotic potentials: -0.1; -0.2; -0.3; -0.4; -0.5; -0.6; -0.9; -1.2 and -1.5 MPa. For the control treatment, it was only used sterile water. The seeds were submitted to the germination test in which the germitest paper was moistened with the relative osmotic solution. The incubation was realized in a germination chamber at 25 ± 2 °C with 16 h light of photoperiod. The experimental design was completely randomized, arranged in a factorial design 2 × 10 (osmotic agent × osmotic potential and control), with four repetitions of 50 seeds each. With the reduction on the osmotic potential was observed lower germination, number of normal seedlings, fresh weight, seedling length and higher number of hard seeds, being the effect of PEG 6000 more severe. The germination and number of abnormal seedlings was higher under NaCl effect than PEG 6000. It can be concluded that germination and early seedling growth of Toona ciliata are affected by both saline and water stress, being more sensitive under water stress and with higher probability of developing abnormal seedlings under saline stress. Agriculture S Forestry Marciéli Pitorini Bovolini verfasserin aut Marcio Alberto Hilgert verfasserin aut Carolina Brito Brose verfasserin aut Eduarda Demari Avrella verfasserin aut Marília Lazarotto verfasserin aut In Ciência Florestal Universidade Federal de Santa Maria, 2005 28(2018), 1, Seite 141-149 (DE-627)491441525 (DE-600)2194052-6 19805098 nnns volume:28 year:2018 number:1 pages:141-149 https://doi.org/10.5902/1980509831633 kostenfrei https://doaj.org/article/c6fb11715638433a872bcc738ce3a2cf kostenfrei http://www.redalyc.org/articulo.oa?id=53455466013 kostenfrei https://doaj.org/toc/0103-9954 Journal toc kostenfrei https://doaj.org/toc/1980-5098 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 28 2018 1 141-149
allfieldsSound	10.5902/1980509831633 doi (DE-627)DOAJ03807186X (DE-599)DOAJc6fb11715638433a872bcc738ce3a2cf DE-627 ger DE-627 rakwb por SD1-669.5 Júlio Rieger Lucchese verfasserin aut ESTRESSE SALINO E HÍDRICO NA GERMINAÇÃO E CRESCIMENTO INICIAL DE PLÂNTULAS DE Toona ciliata M. ROEM. var. australis 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Toona ciliata var. australis is a tree species which yields a very high-quality timber for furniture and is unaffected by Hypsipyla grandella, a pest that attacks monoculture plantations of native species similar to Toona ciliata. It has a close relationship with water availability, occurring mainly in humid forest in its natural habitat. In commercial plantations this is an important limitation to the establishment and initial growing of Toona ciliata. In the last decades, the use of Toona ciliata in commercial plantations has increased in Brazil, however, there is little knowledge about the effect of adverse environments on seed germination and early seedling growth. This study aimed to evaluate the effects of water and saline stress on germination and early seedlings growth of Toona ciliata. Osmotic solutions were prepared with, or NaCl, or PEG 6000, in the following osmotic potentials: -0.1; -0.2; -0.3; -0.4; -0.5; -0.6; -0.9; -1.2 and -1.5 MPa. For the control treatment, it was only used sterile water. The seeds were submitted to the germination test in which the germitest paper was moistened with the relative osmotic solution. The incubation was realized in a germination chamber at 25 ± 2 °C with 16 h light of photoperiod. The experimental design was completely randomized, arranged in a factorial design 2 × 10 (osmotic agent × osmotic potential and control), with four repetitions of 50 seeds each. With the reduction on the osmotic potential was observed lower germination, number of normal seedlings, fresh weight, seedling length and higher number of hard seeds, being the effect of PEG 6000 more severe. The germination and number of abnormal seedlings was higher under NaCl effect than PEG 6000. It can be concluded that germination and early seedling growth of Toona ciliata are affected by both saline and water stress, being more sensitive under water stress and with higher probability of developing abnormal seedlings under saline stress. Agriculture S Forestry Marciéli Pitorini Bovolini verfasserin aut Marcio Alberto Hilgert verfasserin aut Carolina Brito Brose verfasserin aut Eduarda Demari Avrella verfasserin aut Marília Lazarotto verfasserin aut In Ciência Florestal Universidade Federal de Santa Maria, 2005 28(2018), 1, Seite 141-149 (DE-627)491441525 (DE-600)2194052-6 19805098 nnns volume:28 year:2018 number:1 pages:141-149 https://doi.org/10.5902/1980509831633 kostenfrei https://doaj.org/article/c6fb11715638433a872bcc738ce3a2cf kostenfrei http://www.redalyc.org/articulo.oa?id=53455466013 kostenfrei https://doaj.org/toc/0103-9954 Journal toc kostenfrei https://doaj.org/toc/1980-5098 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 28 2018 1 141-149
language	Portuguese
source	In Ciência Florestal 28(2018), 1, Seite 141-149 volume:28 year:2018 number:1 pages:141-149
sourceStr	In Ciência Florestal 28(2018), 1, Seite 141-149 volume:28 year:2018 number:1 pages:141-149
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topic_facet	Agriculture S Forestry
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authorswithroles_txt_mv	Júlio Rieger Lucchese @@aut@@ Marciéli Pitorini Bovolini @@aut@@ Marcio Alberto Hilgert @@aut@@ Carolina Brito Brose @@aut@@ Eduarda Demari Avrella @@aut@@ Marília Lazarotto @@aut@@
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callnumber-first	S - Agriculture
author	Júlio Rieger Lucchese
spellingShingle	Júlio Rieger Lucchese misc SD1-669.5 misc Agriculture misc S misc Forestry ESTRESSE SALINO E HÍDRICO NA GERMINAÇÃO E CRESCIMENTO INICIAL DE PLÂNTULAS DE Toona ciliata M. ROEM. var. australis
authorStr	Júlio Rieger Lucchese
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callnumber-label	SD1-669
illustrated	Not Illustrated
issn	19805098
topic_title	SD1-669.5 ESTRESSE SALINO E HÍDRICO NA GERMINAÇÃO E CRESCIMENTO INICIAL DE PLÂNTULAS DE Toona ciliata M. ROEM. var. australis
topic	misc SD1-669.5 misc Agriculture misc S misc Forestry
topic_unstemmed	misc SD1-669.5 misc Agriculture misc S misc Forestry
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title	ESTRESSE SALINO E HÍDRICO NA GERMINAÇÃO E CRESCIMENTO INICIAL DE PLÂNTULAS DE Toona ciliata M. ROEM. var. australis
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title_full	ESTRESSE SALINO E HÍDRICO NA GERMINAÇÃO E CRESCIMENTO INICIAL DE PLÂNTULAS DE Toona ciliata M. ROEM. var. australis
author_sort	Júlio Rieger Lucchese
journal	Ciência Florestal
journalStr	Ciência Florestal
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author_browse	Júlio Rieger Lucchese Marciéli Pitorini Bovolini Marcio Alberto Hilgert Carolina Brito Brose Eduarda Demari Avrella Marília Lazarotto
container_volume	28
class	SD1-669.5
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author-letter	Júlio Rieger Lucchese
doi_str_mv	10.5902/1980509831633
author2-role	verfasserin
title_sort	estresse salino e hídrico na germinação e crescimento inicial de plântulas de toona ciliata m. roem. var. australis
callnumber	SD1-669.5
title_auth	ESTRESSE SALINO E HÍDRICO NA GERMINAÇÃO E CRESCIMENTO INICIAL DE PLÂNTULAS DE Toona ciliata M. ROEM. var. australis
abstract	The Toona ciliata var. australis is a tree species which yields a very high-quality timber for furniture and is unaffected by Hypsipyla grandella, a pest that attacks monoculture plantations of native species similar to Toona ciliata. It has a close relationship with water availability, occurring mainly in humid forest in its natural habitat. In commercial plantations this is an important limitation to the establishment and initial growing of Toona ciliata. In the last decades, the use of Toona ciliata in commercial plantations has increased in Brazil, however, there is little knowledge about the effect of adverse environments on seed germination and early seedling growth. This study aimed to evaluate the effects of water and saline stress on germination and early seedlings growth of Toona ciliata. Osmotic solutions were prepared with, or NaCl, or PEG 6000, in the following osmotic potentials: -0.1; -0.2; -0.3; -0.4; -0.5; -0.6; -0.9; -1.2 and -1.5 MPa. For the control treatment, it was only used sterile water. The seeds were submitted to the germination test in which the germitest paper was moistened with the relative osmotic solution. The incubation was realized in a germination chamber at 25 ± 2 °C with 16 h light of photoperiod. The experimental design was completely randomized, arranged in a factorial design 2 × 10 (osmotic agent × osmotic potential and control), with four repetitions of 50 seeds each. With the reduction on the osmotic potential was observed lower germination, number of normal seedlings, fresh weight, seedling length and higher number of hard seeds, being the effect of PEG 6000 more severe. The germination and number of abnormal seedlings was higher under NaCl effect than PEG 6000. It can be concluded that germination and early seedling growth of Toona ciliata are affected by both saline and water stress, being more sensitive under water stress and with higher probability of developing abnormal seedlings under saline stress.
abstractGer	The Toona ciliata var. australis is a tree species which yields a very high-quality timber for furniture and is unaffected by Hypsipyla grandella, a pest that attacks monoculture plantations of native species similar to Toona ciliata. It has a close relationship with water availability, occurring mainly in humid forest in its natural habitat. In commercial plantations this is an important limitation to the establishment and initial growing of Toona ciliata. In the last decades, the use of Toona ciliata in commercial plantations has increased in Brazil, however, there is little knowledge about the effect of adverse environments on seed germination and early seedling growth. This study aimed to evaluate the effects of water and saline stress on germination and early seedlings growth of Toona ciliata. Osmotic solutions were prepared with, or NaCl, or PEG 6000, in the following osmotic potentials: -0.1; -0.2; -0.3; -0.4; -0.5; -0.6; -0.9; -1.2 and -1.5 MPa. For the control treatment, it was only used sterile water. The seeds were submitted to the germination test in which the germitest paper was moistened with the relative osmotic solution. The incubation was realized in a germination chamber at 25 ± 2 °C with 16 h light of photoperiod. The experimental design was completely randomized, arranged in a factorial design 2 × 10 (osmotic agent × osmotic potential and control), with four repetitions of 50 seeds each. With the reduction on the osmotic potential was observed lower germination, number of normal seedlings, fresh weight, seedling length and higher number of hard seeds, being the effect of PEG 6000 more severe. The germination and number of abnormal seedlings was higher under NaCl effect than PEG 6000. It can be concluded that germination and early seedling growth of Toona ciliata are affected by both saline and water stress, being more sensitive under water stress and with higher probability of developing abnormal seedlings under saline stress.
abstract_unstemmed	The Toona ciliata var. australis is a tree species which yields a very high-quality timber for furniture and is unaffected by Hypsipyla grandella, a pest that attacks monoculture plantations of native species similar to Toona ciliata. It has a close relationship with water availability, occurring mainly in humid forest in its natural habitat. In commercial plantations this is an important limitation to the establishment and initial growing of Toona ciliata. In the last decades, the use of Toona ciliata in commercial plantations has increased in Brazil, however, there is little knowledge about the effect of adverse environments on seed germination and early seedling growth. This study aimed to evaluate the effects of water and saline stress on germination and early seedlings growth of Toona ciliata. Osmotic solutions were prepared with, or NaCl, or PEG 6000, in the following osmotic potentials: -0.1; -0.2; -0.3; -0.4; -0.5; -0.6; -0.9; -1.2 and -1.5 MPa. For the control treatment, it was only used sterile water. The seeds were submitted to the germination test in which the germitest paper was moistened with the relative osmotic solution. The incubation was realized in a germination chamber at 25 ± 2 °C with 16 h light of photoperiod. The experimental design was completely randomized, arranged in a factorial design 2 × 10 (osmotic agent × osmotic potential and control), with four repetitions of 50 seeds each. With the reduction on the osmotic potential was observed lower germination, number of normal seedlings, fresh weight, seedling length and higher number of hard seeds, being the effect of PEG 6000 more severe. The germination and number of abnormal seedlings was higher under NaCl effect than PEG 6000. It can be concluded that germination and early seedling growth of Toona ciliata are affected by both saline and water stress, being more sensitive under water stress and with higher probability of developing abnormal seedlings under saline stress.
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title_short	ESTRESSE SALINO E HÍDRICO NA GERMINAÇÃO E CRESCIMENTO INICIAL DE PLÂNTULAS DE Toona ciliata M. ROEM. var. australis
url	https://doi.org/10.5902/1980509831633 https://doaj.org/article/c6fb11715638433a872bcc738ce3a2cf http://www.redalyc.org/articulo.oa?id=53455466013 https://doaj.org/toc/0103-9954 https://doaj.org/toc/1980-5098
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author2	Marciéli Pitorini Bovolini Marcio Alberto Hilgert Carolina Brito Brose Eduarda Demari Avrella Marília Lazarotto
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up_date	2024-07-03T15:51:19.261Z
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