Germination temperatures and seed dormancy of two Larrea species (Zygophyllaceae) from the Monte Desert, Argentina

The genus Larrea includes five species of desert shrubs distributed along the American Continent. These species produce dormant mature seeds, but the type of dormancy and the factors that produce it have been poorly assessed. The objective of this work was to determine the optimum germination temper...

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Autores principales: Fernández, María Emilia, Cony, Mariano Anibal, Passera, Carlos Bernardo
Formato: Artículo revista
Lenguaje:Inglés
Publicado: Facultad de Ciencias Agrarias-UNCuyo 2019
Materias:
inhibidores de la germinación
Larrea cuneifolia
Larrea nitida
temperatura optima
dormición física
germination inhibitors
optimum temperature
physical dormancy
Acceso en línea:https://revistas.uncu.edu.ar/ojs3/index.php/RFCA/article/view/2692
Aporte de:
Revista de la Facultad de Ciencias Agrarias UNCuyo de Universidad Nacional de Cuyo
id I11-R107article-2692
record_format ojs
institution Universidad Nacional de Cuyo
institution_str I-11
repository_str R-107
container_title_str Revista de la Facultad de Ciencias Agrarias UNCuyo
language Inglés
format Artículo revista
topic inhibidores de la germinación
Larrea cuneifolia
Larrea nitida
temperatura optima
dormición física
germination inhibitors
Larrea cuneifolia
Larrea nitida
optimum temperature
physical dormancy
spellingShingle inhibidores de la germinación
Larrea cuneifolia
Larrea nitida
temperatura optima
dormición física
germination inhibitors
Larrea cuneifolia
Larrea nitida
optimum temperature
physical dormancy
Fernández, María Emilia
Cony, Mariano Anibal
Passera, Carlos Bernardo
Germination temperatures and seed dormancy of two Larrea species (Zygophyllaceae) from the Monte Desert, Argentina
topic_facet inhibidores de la germinación
Larrea cuneifolia
Larrea nitida
temperatura optima
dormición física
germination inhibitors
Larrea cuneifolia
Larrea nitida
optimum temperature
physical dormancy
author Fernández, María Emilia
Cony, Mariano Anibal
Passera, Carlos Bernardo
author_facet Fernández, María Emilia
Cony, Mariano Anibal
Passera, Carlos Bernardo
author_sort Fernández, María Emilia
title Germination temperatures and seed dormancy of two Larrea species (Zygophyllaceae) from the Monte Desert, Argentina
title_short Germination temperatures and seed dormancy of two Larrea species (Zygophyllaceae) from the Monte Desert, Argentina
title_full Germination temperatures and seed dormancy of two Larrea species (Zygophyllaceae) from the Monte Desert, Argentina
title_fullStr Germination temperatures and seed dormancy of two Larrea species (Zygophyllaceae) from the Monte Desert, Argentina
title_full_unstemmed Germination temperatures and seed dormancy of two Larrea species (Zygophyllaceae) from the Monte Desert, Argentina
title_sort germination temperatures and seed dormancy of two larrea species (zygophyllaceae) from the monte desert, argentina
description The genus Larrea includes five species of desert shrubs distributed along the American Continent. These species produce dormant mature seeds, but the type of dormancy and the factors that produce it have been poorly assessed. The objective of this work was to determine the optimum germination temperatures of L. cuneifolia and L. nitida, to analyze the response to pre-germination treatments, and to evaluate the type of seed dormancy these species have. Seeds were incubated at five constant tempera¬tures and were subjected to mechanical scarification and rinsed with running water to break dormancy. Seed coat permeability and the presence of water-soluble germi¬nation inhibitors were also assessed. The optimum germination temperature range was between 15-40ºC for both species. A positive response to all pre-germination treatments was observed in L. cuneifolia (37-47%), while L. nitida showed higher germination percentage only with mechanical scarification (73%). Both species presented water-permeable seed coats, ruling out the occurrence of a physical dormancy. The inhibitory test of seed-coat extracts was positive for L. cuneifolia, suggesting the possible presence of a chemical dormancy. These results are valuable for conservation purposes and directly contribute to improving production of seedlings required for restoration projects.
publisher Facultad de Ciencias Agrarias-UNCuyo
publishDate 2019
url https://revistas.uncu.edu.ar/ojs3/index.php/RFCA/article/view/2692
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last_indexed 2022-06-20T13:51:41Z
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