Emergência de plântulas oriundas de sementes recém colhidas e armazenadas de Copaifera langsdorffii Desf. (caesalpinioideae), triângulo mineiro, Brasil

Pereira, Regina dos Santos; Santana, Denise Garcia de; Ranal, Marli A.

doi:10.1590/s0100-67622009000400007

Cited by 17 publications

(13 citation statements)

References 17 publications

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“…The seedling emergence of Hymenaea courbaril is slow and asynchronous even without mechanical dormancy, which was removed through mechanical scarification. The range between the first and last emergence, the higher mean emergence time and uncertainty, and lower Z values in relation to other native species confirm this information, although there are slower and more asynchronous species than this (Carvalho et al 2005, Pereira et al 2009, Mendes-Rodrigues et al 2011a, b, Dorneles et al 2013, Ribeiro-Oliveira et al 2013, Berger et al 2014, Ribeiro-Oliveira & Ranal 2016.…”

Section: Discussionsupporting

confidence: 62%

Ex situ initial seedling development of Hymenaea courbaril L. (Fabaceae): a crucial phase to preserve the species

Grisi

Dorneles

Ranal

et al. 2019

Hoehnea

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Hymenaea courbaril L. is an important Neotropical species, with low population density, restricted to fragments of semideciduous forests, with low mortality and low recruitment. Thus, some questions guided the goals of this paper including the capacity of stored seeds to form normal seedlings. Seeds collected from ten mother plants in the Brazilian Cerrado region and stored during three years were mechanically scarified, sown and analyzed during 43 days. Intraspecific variability was observed for water content, seed biometry, and emergence process. The seedling emergence varied from 19 to 92%. Nine phases of development were observed. About 91% of the seedlings reached their complete autotrophy and this represents the success of the sample; the rest of the seedlings presented atypical morphology. This means that it is possible to store the seeds with the purpose of obtaining seedlings for ex situ cultivation. The great consumption of the cotyledon reserves occurred in the period that marks the alignment of cotyledons with hypocotyls (phases 1 to 4). For this species, if the seeds are scarified, the first 40 days after sowing are essential for the seedling establishment. After this time, the cotyledons fall signing a good point of reference for restoration projects because it indicates that the young plant is autonomous.

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Section: Discussionsupporting

confidence: 62%

Ex situ initial seedling development of Hymenaea courbaril L. (Fabaceae): a crucial phase to preserve the species

Grisi

Dorneles

Ranal

et al. 2019

Hoehnea

Self Cite

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“…This fact is critical for studies on D r a f t native species that do not produce diaspores regularly, such as Copaifera langsdorffii Desf. (Pereira et al 2009), and species with low production or with a high number of seeds without embryos (Mendes-Rodrigues et al 2010;Ranal et al 2010). These studies are frequently conducted with a wide range of sample sizes.…”

Section: Discussionmentioning

confidence: 99%

Sample size in studies on the germination process

Ribeiro‐Oliveira

Ranal

2016

Botany

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Studies on diaspore germination in native species with low economic relevance but great ecological significance have been based on a wide range of sample sizes. However, can the sample size change the physiological inferences made from germination measurements? To answer this question, diaspores of six Cerrado species were evaluated for germinability, germination time (initial, mean, and final), germination velocity (mean germination rate and Maguire’s rate), coefficient of variation of the germination time, and synchronization index of the germination process. Germinability, final time, mean time, and synchronization index were robust with respect to sample size fluctuation. Maguire’s rate, initial time, coefficient of variation of the germination time, and mean germination rate, in contrast, were affected by sample size fluctuation, at least in one of the species tested. The robustness of the time measurements and the synchronization index also demonstrates that the germination process occurs in a cadenced rhythm, much like a biological clock. Among the measurements evaluated, Maguire’s rate is the only one that must be avoided, since it is strongly influenced by sample size and by the balance between germinability and mean germination rate. These results demonstrate that sample size can affect inferences about the germination process and can compromise restoration and (or) conservation efforts.

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“…(VILELA, 1993;PEREIRA et al, 2007;PEREIRA et al, 2009). Essa inibição se deve à presença de substâncias inibidoras, também observadas em Piptodenio macrocarpo Benth., Joannesia princeps Vell.…”

Section: Ocorre No Brasil Desde O Sul Da Bahia Até O Riounclassified

Métodos de remoção da sarcotesta na germinação de sementes de jaracatiá

Freitas¹,

Barroso

Silva

et al. 2011

Rev. Árvore

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Métodos de remoção da sarcotesta na... MÉTODOS DE REMOÇÃO DA SARCOTESTA NA GERMINAÇÃO DE SEMENTES DE JARACATIÁ 1RESUMO -A presença da sarcotesta pode prejudicar a germinação e desenvolvimento das plântulas. O objetivo deste trabalho foi identificar métodos favoráveis à remoção da sarcotesta para a promoção da germinação de sementes de Jaracatia spinosa, cujas sementes foram submetidas aos seguintes tratamentos: 1-sem remoção da sarcotesta; 2-remoção com fricção sobre peneira, com adição de areia; 3-remoção com fricção sobre peneira com adição de cal; 4-remoção com o uso de liquidificador, 5-remoção com despolpador de sementes; e 6-remoção com solução química (imersão, por 30 min, numa solução composta por 1.0 L de água, 3.5 mL de hipoclorito de sódio, 3.0 mL de ácido muriático e 22.5g de soda cáustica), em que as sementes foram avaliadas quanto à percentagem de germinação, Índice de Velocidade de Emergência (IVE) e comprimento da parte aérea de plântulas. O método mais favorável à remoção da sarcotesta e promoção da germinação das sementes de jaracatiá foi a fricção sobre peneira com a adição de areia. GERMINATION OF JARACATIÁ SEEDS SUBMITTED TO DIFFERENT METHODS OF SARCOTESTA REMOVAL ABSTRACT -The objective of this work was to verify the effect of different removal methods of the sarcotesta of Jaracatia spinosa (Aubl.) A. DC. seeds on the germination percentage, (SGI) Speed of Germination

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Emergência de plântulas oriundas de sementes recém colhidas e armazenadas de Copaifera langsdorffii Desf. (caesalpinioideae), triângulo mineiro, Brasil

Cited by 17 publications

References 17 publications

Ex situ initial seedling development of Hymenaea courbaril L. (Fabaceae): a crucial phase to preserve the species

Ex situ initial seedling development of Hymenaea courbaril L. (Fabaceae): a crucial phase to preserve the species

Sample size in studies on the germination process

Métodos de remoção da sarcotesta na germinação de sementes de jaracatiá

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