Germinação de sementes de Senna siamea (Lam.) H.S. Irwin E Barneby: Caesalpinoideae

Dutra, Alek Sandro; Filho, Sebastião Medeiros; Teófilo, Elizita Maria; Diniz, Fábio Oliveira

doi:10.1590/s0101-31222007000100022

Cited by 13 publications

(9 citation statements)

References 15 publications

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“…speciosa Schrad., C. spectabilis DC., C. splendida Vogel, C. tora L., now are included in Senna or Chamaecrista (see Fig. 1) and exclusively produce seeds with PY (see Faruqi et al 29 , Martin et al 30 , Rizzini 31 , Bhatia et al 32 , Zegers and Lechuga 33 , Daiya et al 34 , Teem et al 35 , Gill et al 16 , Felippe and Polo 36 , Kay et al 37 , Khan et al 38 , Cissé 39 ; Al-Helal et al 40 , Elberse and Breman 41 , Bhattacharya and Saha 42 , Rodrigues et al 43 , Capelanes 44 , Todaria and Negi 19 , Francis and Rodriguez 45 , Lezama et al 46 , Agboola 47 , Baskin et al 48 , Jeller and Perez 49 , Fowler and Bianchetti 50 , Bargali and Singh 51 , Dutra et al 52 , Ellis et al 53 , Baskin and Baskin 9 , Mishra and Bohra 54 , Rodrigues-Junior et al 13 ).…”

Section: Resultsmentioning

confidence: 99%

What kind of seed dormancy occurs in the legume genus Cassia?

Rodrigues-Junior

Santos

Hass

et al. 2020

Sci Rep

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Cassia is a diverse legume genus widespread in the (sub-)tropical zone of the world. Several studies have been done on this genus; however, significant changes have occurred at the taxonomic level over the years. this has led to inaccurate information about seed dormancy in Cassia since many species are no longer included in the genus. thus, our work aims to investigate and update the information about the kind of dormancy that occurs in seeds of Cassia species and also look into two notorious species in this group (C. fistula and C. javanica) to compare myxospermous vs. non-myxospermous seeds regarding dormancy and germination traits. Seed dormancy reports were found for 53 Cassia species, and the only kind of seed dormancy found for these species was physical dormancy (pY). nondormancy was not found, and all seeds had a blockage to water uptake during the dormant state, that is, all have PY. Of these 53 species, only 18 are currently included in the genus Cassia. C. fistula and C. javanica have fully developed embryos, and dormancy is only conferred by the (water-impermeable) seed coat. the lens in the seed coat is the only structure that creates a water pathway to break pY in C. fistula. Myxospermous seeds came out of dormancy faster than non-myxospermous ones. PY seems to be the only kind of seed dormancy that has evolved in Cassia. The extent of this kind of dormancy in all subtribe cassiinae is also discussed. Cassia L. sensu stricto was first proposed by Irwin and Barneby 1,2 , who segregated Cassia sensu lato into three genera (Cassia L., Chamaecrista Moech. and Senna Mill.), establishing the subtribe Cassiinae (Leguminosae: Caesalpinioideae). The genus Cassia was considered as the largest genus in Caesalpinioideae 3,4 , but currently it is comprised of only about 30 species 5. Their fruits usually are indehiscent (also divided by transversal septa), unlike those of Senna, which are typically dehiscent and without septa separating the seeds 2. The woody indehiscent pods of Cassia are quite tough, as well as the seeds. Additionally, Cassia fruits are not fleshy, but with remnants of pulp. The presence of these fruit traits suggests that large mammals could disperse Cassia seeds. However, a possible absence of seed dispersers for some species leads to speculation that these indehiscent fruits were likely dispersed by megafauna that are now extinct. Janzen and Martin 6 reported that some fruit traits are better related to extinct animals (seed dispersal anachronisms), since some tough fruits may not be consumed (and seeds dispersed) by smaller extant animals. The absence of dispersers affects seed fate 6 , not only because of the lack of dispersal but also due to the ability of dispersers to break over the tough fruits and release the seeds. Concerning seed dormancy, Baskin and Baskin 7 proposed a classification system that includes five classes (see Baskin and Baskin 7), wherein dormancy is associated with the embryo or other seed components (e.g. the seed coat). Among these five classes of dormancy, physic...

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Section: Resultsmentioning

confidence: 99%

What kind of seed dormancy occurs in the legume genus Cassia?

Rodrigues-Junior

Santos

Hass

et al. 2020

Sci Rep

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“…[11] studied treatments to overcome dormancy of Sterculia striata concluded that scarification with sandpaper number 80 on the opposite side of micropylar favors the percentage of seedlings in the first count, and recommended rapid and uniform emergence of seeds of Sterculia striata, but the mechanical scarification no increases germination of the studied species, however, in other species the scarification with sandpaper favors the germination of seeds that have water-impermeable seed coat, as well as seeds of Senna macranthera [12], Ocotea corymbosa [13], Leucaena diversifolia [14], Operculina macrocarpa [15], Acacia mearnsii [16], Ormosia arborea [17], Schizolobium amazonicum [18], Leucaena leucocephala [7] and Senna siamea [19].…”

Section: Resultsmentioning

confidence: 99%

Methods for Breaking Dormancy of Seeds of Tropical Forage Legumes

Morais¹,

Almeida²,

Deminicis³

et al. 2014

AJPS

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The aim of this study was to evaluate methods for breaking dormancy of seeds Neonotonia wightii (perennial soybean), Macrotiloma axilare (archer), Pueraria phaseoloides (tropical kudzu), Calopogonium mucunoides (calopo), which were subjected to the following treatments for physical breaks and physiological dormancy: 1) control; 2) scarification with sandpaper; 3) immersion in H2SO4 98% for five minutes and subsequent washing in water; 4) preheating at 60˚C for 150 minutes in an air circulating oven; 5) 0.2% KNO3; and 6) gibberellic acid (GA3 0.5%). The results showed that using H2SO4 to break seed dormancy archer and perennial soybean and calopo scarification with sandpaper were the most recommended treatments. Tropical Kudzu presented physiological response to treatments with the use of gibberellic acid and physical treatment using immersion H2SO4. Thus, it is necessary to use techniques to make the breaking dormancy of seeds of legumes, resulting in an increase in the rate of seed germination and rapid deployment of the legume.

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“…El elevado porcentaje de semillas duras al finalizar el ensayo indica que este método es insuficiente para superar la barrera física de la cubierta seminal, ya que las semillas escarificadas sembradas en ambos sustratos no mostraron diferencias significativas respecto al control en papel. Sin embargo, Sobrevilla-Solís et al (2013) propusieron la escarificación mecánica como un método adecuado para estimular la germinación en Prosopis, extremando cuidados para no afectar la calidad fisiológica de las semillas (Dutra et al 2007) Además, Rodríguez Araujo et al (2017 indicaron que la técnica de escarificación puede variar según la persona que la realiza, obteniendo con estos métodos elevados porcentajes de germinación en distintas especies de Prosopis. Por lo tanto, esto podría explicar los altos porcentajes de semillas duras obtenidas en la presente investigación.…”

Section: Discussionunclassified

“…Entre los tratamientos pregerminativos más utilizados para superar la dormición física, se encuentran la escarificación mecánica, térmica y la química (Sanabria et al 2004, Dutra et al 2007, Muñoz et al 2009, Pereira et al 2016, Trombin Souza et al 2018. Algunos autores describen los requerimientos germinativos de diferentes especies de Prosopis (Bravo et al 2011, Sobrevilla Solís et al 2013, Rodríguez Araujo et al 2017) y sugieren la importancia del estudio particular para cada especie y ambiente.…”

Section: Introductionunclassified

Germinación y efectos del almacenamiento de frutos de Prosopis ruscifolia (Fabaceae)

2020

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Prosopis ruscifolia is a promising forest species for restoration of saline areas that produces high quality wood and nutraceutical interest fruits. Its germination requirements and optimal storage conditions are unknown. The objectives of the work were 1) to evaluate different methods to stimulate germination, 2) to establish if there is an interaction between pregerminative treatments and the substrate used in laboratory tests (paper or sand), and 3) to analyze the effect of three different conditions of fruit storage on germination. Normal seedlings (PG), abnormal seedlings, hard and dead seeds were recorded. Three fruit samples were stored for eight months at 7 ± 2 °C,-17 ± 2 °C and the control at 25 °C. Afterwards, germination tests were carried out and the speed indexes (IVG) and mean germination time (TMG) were determined. Results indicated that chemical scarification with sulfuric acid was the most efficient pregerminative treatment to stimulate germination in both substrates. Immersion in water at room temperature showed the lowest percentage of germination in both substrates. The seeds of fruits stored at 7 ± 2 ° C had the highest germination percentage. Low temperatures improved velocity indices (IVG) and mean germination time (TMG). Results indicated the need for methods to overcome seed dormancy in P. ruscifolia and the excellent tolerance to low temperatures during fruit storage.

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Germinação de sementes de Senna siamea (Lam.) H.S. Irwin E Barneby: Caesalpinoideae

Cited by 13 publications

References 15 publications

What kind of seed dormancy occurs in the legume genus Cassia?

What kind of seed dormancy occurs in the legume genus Cassia?

Methods for Breaking Dormancy of Seeds of Tropical Forage Legumes

Germinación y efectos del almacenamiento de frutos de Prosopis ruscifolia (Fabaceae)

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