Germinação de sementes de Parkia pendula (Willd.) Benth. ex Walp. (fabaceae) em diferentes temperaturas

RESUMO -Conhecida popularmente como fava de bolota, a Parkia platycephala Benth. pertence a família Fabaceae, ocorre em áreas de transição Caatinga-Cerrado e apresenta grande potencial madeireiro, paisagístico e, principalmente, forrageiro. O objetivo da pesquisa é fornecer informações para a elaboração de protocolos de testes de germinação de sementes e vigor de plântulas de P. platycephala, submetidas a diferentes subtratos e temperaturas. Para avaliar o efeito do substrato e da temperatura, as sementes foram semeadas entre os substratos: vermiculita, areia, pó de coco, bagaço da cana-de-açúcar, tropstrato®, papel (RP), marca Germitest e papel mata-borrão, distribuídas em caixas plásticas transparentes, todos sob luz contínua em germinador tipo Biochemical oxygen Demand (B.O.D.), com temperaturas constantes de 5; 10; 15; 20; 25; 30; 35 e 40 °C, e temperaturas alternadas de 20-30 ºC e 25-35 ºC. Foram avaliadas as variáveis germinação, índice de velocidade de germinação, tempo médio da germinação, comprimento da raiz primária e da parte aérea, e massa seca da raiz primária e da parte aérea. A temperatura alternada de 25-35 °C combinada com o substrato vermiculita é recomendada para realização de testes de germinação e vigor de P. platycephala. Palavras-chave: Fava de bolota. Sementes florestais nativas. Ecofisiologia.ABSTRACT -Parkia platycephala Benth., known locally as Fava de Bolota, belongs to the Fabaceae family and occurs in areas of Caatinga-Cerrado transition, having great potential for use as timber, in landscaping and mainly as forage. The aim of this research was to provide information for the preparation of test protocols for seed germination and seedling vigour in P. platycephala submitted to different substrates and temperatures. To evaluate the effect of substrate and temperature, the seeds were sown on the following substrates: vermiculite, sand, powdered coconut, sugarcane bagasse, Tropstrato®, Germitest paper (RP) and blotting paper, distributed in transparent plastic boxes under continuous lighting in a biochemical oxygen demand (BOD) germinator at constant temperatures of 5, 10, 15, 20, 25, 30, 35 and 40 °C, and alternating temperatures of 20-30 °C and 25-35 °C. The variables under evaluation were germination, germination speed index, mean germination time, primary root and shoot length and primary root and shoot dry weight. The alternating temperature of 25-35 °C combined with vermiculite is recommended for performing tests of germination and vigour in P. platycephala.

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“…Ex walp. (ROSSETO et al, 2009), Dimorphandra mollis benth. (PACHECO et al, 2010), Amburana cearensis (Allemão) A.C. Smith.…”

Section: Introductionmentioning

confidence: 99%

Germination and seedling vigour in Parkia platycephala Benth. in different substrates and temperatures

Silva

Matos

Farias

et al. 2017

Revista Ciência Agronômica

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“…Benth. ex Walp., a temperatura de 30°C foi a mais favorável para a germinação e formação de plântulas (ROSSETO et al, 2009).…”

Section: Introductionunclassified

Potencial fisiológico de sementes de Clitoria fairchildiana R. A. Howard. - Fabaceae submetidas a diferentes regimes de luz e temperatura

Alves

Bruno

et al. 2012

Cienc. Rural

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“…Root length of Parkia pendula Willd seedlings at 25 and 30°C was higher compared to the others temperatures (ROSSETO et al, 2009). The length of the primary root of Clitoria fairchildiana (R.A. Howard) seedlings at 25°C in the green, red, and far-red light regimes was higher (ALVES et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

Germination and vigor of Caesalpinia pulcherrima (L.) Sw. seeds under different light and temperature conditions

Alves

Araújo

et al. 2018

Cienc. Rural

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Caesalpinia pulcherrima is a Fabaceae family species from Central America, which has a small size and is widely used as a living fence in the urban afforestation for streets, parks, and gardens. Based on this importance, the aim of this research was to study the influence of light and temperature on the germination of C. pulcherrima seeds. The study was carried out at the Laboratory of Seed Analysis of the Center of Agricultural Sciences of the Universidade Federal da Paraíba, Areia, PB, Brazil. The experimental design was completely randomized, comprising a 3x5 (three temperatures and five light regimes) factorial scheme with four replicates containing 25 seeds each. Germination and vigor of seeds were evaluated under temperatures of 25°C and 30ºC constant and 20-30ºC alternated in different light regimes: white, green, red-distant, red, and absence of light. Variables analyzed were: germination, first germination count, germination speed index, root length, shoot length, and the ratio of dry mass of root/shoot of the seedlings. Seeds of C. pulcherrima germinate in the presence and absence of light, being a neutral photoblastic. Recommendation to test the vigor of these seeds is the temperature of 30°C in the white light regime.

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Germinação de sementes de Parkia pendula (Willd.) Benth. ex Walp. (fabaceae) em diferentes temperaturas

Abstract: Germinação de sementes de

Cited by 19 publications

References 11 publications

Germination and seedling vigour in Parkia platycephala Benth. in different substrates and temperatures

Germination and seedling vigour in Parkia platycephala Benth. in different substrates and temperatures

Potencial fisiológico de sementes de Clitoria fairchildiana R. A. Howard. - Fabaceae submetidas a diferentes regimes de luz e temperatura

Germination and vigor of Caesalpinia pulcherrima (L.) Sw. seeds under different light and temperature conditions

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