Métodos para superação da dormência e biometria de frutos e sementes de Parkia nitida Miquel. (Leguminosae - Mimosoideae)

Cruz, E. D.; Carvalho, J. E. U. de; Leão, N. V. M.

doi:10.1590/1809-43922001312177

Cited by 13 publications

(10 citation statements)

References 2 publications

(2 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…All treatments to overcome dormancy promoted seed germination, however, scarification for 60 minutes had the highest germination (92%) when immediately sown, and 86.5% when sown after 24 hours. Sulphuric acid has been reported as an efficient method to increase, accelerate and unify seed germination of species with seed impermeable coat (Bianchetti & Ramos, 1981;Santarém & Áquila, 1995;Alves et al, 2000;Araújo et al, 2000;Bruno et al, 2001;Cruz et al, 2001b;MacDonald & Omoruyi, 2003). However, exposure time to acid is critical and needs to be quantified for each species, since seeds ex- posed to long period can be damaged (Schmidt, 2000).…”

Section: Resultsmentioning

confidence: 99%

“…Seeds of Bowdichia virgiloides Kunth scarified for five minutes in sulphuric acid germinated 90% as compared to 21% of the control (Smiderle & Souza, 2003). Cruz et al (2001b) observed germination higher than 74% in Parkia nitida Miq. seeds scarified for 10, 20, 40 and 80 minutes while the control treatment presented only a germination of 1.5%.…”

Section: Introductionmentioning

confidence: 86%

See 1 more Smart Citation

Scarification with sulphuric acid of Schizolobium amazonicum Huber ex Ducke seeds - FABACEAE

Cruz

Carvalho

Queiroz

2007

Sci. agric. (Piracicaba, Braz.)

Self Cite

View full text Add to dashboard Cite

Seed coat impermeability to water occurs in many species, including Schizolobium amazonicum Huber ex Ducke. To promote germination in seeds with coat impermeability the use of sulphuric acid (H 2 SO 4 ) is recommended. The objective of this study was to identify a better time for the scarification with sulphuric acid for S. amazonicum seeds. The effect of scarification with sulphuric acid for 20, 40 and 60 min on germination and speed germination was studied for seeds that were either sowed immediately after scarification or after a 24-hour period of immersion in water. Seeds were sown on a mix of sand and sawdust (1:1). The experimental design was completely randomized with four replications of 50 seeds. The statistical analysis of germination was carried out at six, nine, 12, 15, 18, 21 and 24 days after sowing, in a factorial scheme. For speed germination the means were compared by the Tukey test. There was an interaction between treatments to overcome dormancy and immersion time after scarification in most evaluations. Immersion in water accelerated the beginning of germination. All treatments to overcome dormancy promoted seed germination. However, scarification for 60 min, showed better germination, 92% when immediately sown and 86.5% when sown after 24 hours. Speed germination index was highest for scarified seeds for 60 min followed by immersion in water. Scarification for 60 min was the most efficient treatment to promote germination in S. amazonicum seeds. Key words: tropical species, Amazonian region, hard seed, seeds coat impermeability, physical dormancy ESCARIFICAÇÃO COM ÁCIDO SULFÚRICO DE SEMENTES DE

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 86%

Scarification with sulphuric acid of Schizolobium amazonicum Huber ex Ducke seeds - FABACEAE

Cruz

Carvalho

Queiroz

2007

Sci. agric. (Piracicaba, Braz.)

Self Cite

View full text Add to dashboard Cite

show abstract

“…Os métodos adequados para análises de sementes de espécies florestais tem sido alvo de grande interesse, especialmente quando visa à obtenção de informações que expressem a qualidade fisiológica da semente (Cruz e Carvalho, 2003). No entanto, os dados disponíveis sobre a caracterização de frutos e sementes e as informações silviculturais com relação ao potencial germinativo ainda são bastante escassos para espécies tropicais nativas (Cruz et al, 2001a;Araújo Neto et al, 2003;Silva e Carvalho, 2008).…”

Section: Introductionunclassified

Tamanho de frutos e de sementes e sua influência na germinação de jatobá-do-cerrado (Hymenaea stigonocarpa var. stigonocarpa Mart. ex Hayne, Leguminosae - Caesalpinoideae)

Pereira¹,

Giraldelli²,

Laura³

et al. 2011

Rev. bras. sementes

View full text Add to dashboard Cite

andRéa lúcia teixeiRa de Souza 5 RESUMO -Neste estudo foi descrito a biometria de frutos e de sementes de uma população de Hymenaea stigonocarpa var. stigonocarpa foi avaliado o efeito da massa de sementes na proporção e no tempo de germinação, sob condições de laboratório (câmara de germinação) e em viveiro, considerando como critérios de germinação a protrusão da raiz primária e a expansão de eófilos. Esta população de jatobá-do-cerrado apresentou uma grande variação no tamanho de frutos e de sementes. A massa das sementes variou entre 0,546 e 7,666 g e estas foram classificadas em pequenas, médias e grandes. Uma proporção maior de sementes classificadas como médias, emitiu a raiz primária em relação às grandes, enquanto as pequenas ocuparam posição intermediária. A massa de sementes não influencia a proporção de sementes que apresenta expansão de eófilos. As sementes grandes emitem a raiz primária mais rapidamente que as pequenas. O tempo médio da expansão de eófilos decresce com a redução da massa de sementes. Apesar das sementes médias e pequenas possuírem maior potencial para expor a raiz primária, estas apresentam maior taxa de mortalidade na transição entre as fases de protrusão da raiz primária e de expansão de eófilos.Termos para indexação: biometria, protrusão da raiz primária, expansão de eófilos. FRUIT AND SEED SIZE AND THEIR INFLUENCE ON THE GERMINATION OF Hymenaea stigonocarpa var. stigonocarpa Mart. ex Hayne (LEGUMINOSAE-CAESALPINOIDEAE)ABSTRACT -This study describes the biometry of the fruits and seeds of a population of Hymenaea stigonocarpa var. stigonocarpa. The effect of seed weight on the proportion and time of germination was evaluated under laboratory (BOD incubator) and nursery conditions, considering as criteria for germination, primary root protusion and eophylum expansion. This population of H. stigonocarpa var. stigonocarpa varied significantly in fruit and seed size with seed weights ranging between 0.546 and 7.666 g and classified as small, medium and large. A higher proportion of medium-sized seeds emitted the primary root compared to large seeds, whereas small seeds showed an intermediate pattern. However, seed weight did not influence the proportion of seeds that expanded the eophylum. The primary root of large seeds emerged faster than those of small

show abstract

“…This scarification method may cause damage to cotyledons favoring the development of fungi, increasing the number of dead seeds and abnormal seedlings. Cruz et al (2001b) reported increase on dead seeds and abnormal seedlings in Parkia nitida Miquel. when seeds were scarified by abrasive surface and not treated with fungicide.…”

Section: Table 1 Number Of Days To Emergence Onset (Deo) Emergence mentioning

confidence: 98%

Methods for overcoming dormancy in Dinizia excelsa Ducke seeds

Cruz

QuEiroz²

2009

Rev. bras. sementes

Self Cite

View full text Add to dashboard Cite

-The impermeability of seed coat to water is common mechanism in Fabaceae seeds. Treatments to overcome hardseededness include scarification with sulphuric acid, scarification on abrasive surface and soaking in water among others. The objective of this study was to identify an effective method to overcome dormancy in Dinizia excelsa seeds. A pre-test (untreated seed) and three experiments were carried out: immersion of seeds in acid sulphuric for 10, 20, 30, 40, 50 and 60min (experiment 1); scarification on abrasive surface at the positions distal end, near of the mycrophyle and on the lateral tissue and tegument clipping at 1mm of the distal end, near of the mycrophyle and on the lateral tissue (experiment 2); scarification on abrasive surface and immersion in water for 0, 12, 24 and 48h (experiment 3). The experimental design was completely with four replications of 50 seeds for each treatment. The statistical analysis was carried out by ANOVA and regression analysis. Seedlings emergence on untreated seeds started on the 8 th day after sowing and reached 52.5% on the 1,709 th day. In general, the treatments to overcome dormancy increase emergence. Emergence was higher for seeds treated with sulphuric acid for 20 and 30min with emergence of 93.6% and 86.6%, respectively. For seeds scarified on abrasive surface higher emergences were recorded for scarification on distal end, near of the mycrophyle and on the lateral, 82.7%, 74.3% and 75.7%, respectively. Seeds scarified manually showed higher emergence when not immersed in water (75%), or when immersed for 12 and 24h (75%, 73.6% and 65.6%, respectively). Immersion seeds in sulphuric acid for 20 and 30min and scarification on abrasive surface of distal end are effective to overcome dormancy in D. excelsa. e acompanhar seu processo de germinação ao longo do tempo . Foram conduzidos um pré-teste (sementes não escarificadas) e três experimentos: imersão em ácido sulfúrico por 10, 20, 30, 40, 50 e 60min (experimento 1); escarificação em superfície abrasiva na região distal, próximo a micrópila e na lateral da semente e corte de 1mm no tegumento na região distal, próximo a micrópila e na lateral da semente (experimento 2); escarificação em superfície abrasiva e imersão em água por 0, 12, 24 e 48h (experimento 3). O delineamento experimental foi inteiramente casualizado com quatro repetições de 50 sementes por tratamento. A análise estatística consistiu de ANOVA e análise de regressão. Sementes não escarificadas iniciaram a emergência de plântulas oito dias após a semeadura e atingiu 52,5% aos 1.709 dias. Em geral, os tratamentos para superação da dormência promoveram a emergência das plântulas. A emergência foi maior nas sementes escarificadas com ácido sulfúrico por 20 e 30min com 93,6% 86,6%, respectivamente. Nas sementes submetidas a escarificação abrasiva e corte no tegumento, os melhores tratamentos foram escarificação na região distal, próximo à micrópila e na lateral da semente com 82,7%, 74,3% e 75,7%, respectivamente. Sementes escarificadas em superf...

show abstract

Métodos para superação da dormência e biometria de frutos e sementes de Parkia nitida Miquel. (Leguminosae - Mimosoideae)

Cited by 13 publications

References 2 publications

Scarification with sulphuric acid of Schizolobium amazonicum Huber ex Ducke seeds - FABACEAE

Scarification with sulphuric acid of Schizolobium amazonicum Huber ex Ducke seeds - FABACEAE

Tamanho de frutos e de sementes e sua influência na germinação de jatobá-do-cerrado (Hymenaea stigonocarpa var. stigonocarpa Mart. ex Hayne, Leguminosae - Caesalpinoideae)

Methods for overcoming dormancy in Dinizia excelsa Ducke seeds

Contact Info

Product

Resources

About