Scarification, temperature and light in germination of Senna occidentalis seed (Caesalpinaceae)

Delachiave, María Elena Aparecida; Pinho, Sheila Zambello de

doi:10.15258/sst.2003.31.2.01

Cited by 18 publications

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“…Seeds of 10 of the 11 Senna species in our study had PY; those of the unidentified ornamental Senna species were non-dormant. Seeds of most Senna species that have been studied had PY (Teketay, 1996; Baskin et al , 1998; Delachiave and Pinho, 2003; Lacerda et al , 2004). The Senna species with non-dormant seeds in our study is an ornamental.…”

Section: Discussionmentioning

confidence: 99%

Seed dormancy and storage behaviour in tropical Fabaceae: a study of 100 species from Sri Lanka

et al. 2013

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Seeds of legumes are generally considered to have physical dormancy and to be orthodox, but most seed biologists are unaware of the various kinds and combinations of dormancy and storage behaviour in seeds of this family. The aim of our study was to document the dormancy and storage behaviour of seeds of 100 native and introduced tropical Fabaceae species in Sri Lanka and classify them into germination/storage behaviour categories. Moisture content (MC) was , 16% for fresh seeds of 94 species and . 29% for those of six. Seeds of these six species had low tolerance for desiccation and for low temperatures. Thus, seeds of six species are non-orthodox and 94 species orthodox. Nine of the 100 species were non-dormant, and 2, 3 and 86 had physiological, physiological epicotyl and physical dormancy, respectively. Six germination/storage behaviour categories were identified among the 100 species. However, as in extratropical regions of the world, orthodox storage behaviour and physical dormancy are characteristic of seeds of the majority of species of Fabaceae in tropical Sri Lanka.

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Section: Discussionmentioning

confidence: 99%

Seed dormancy and storage behaviour in tropical Fabaceae: a study of 100 species from Sri Lanka

et al. 2013

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“…Irwin & Barneby (Borges et al, 1997;Cassaro-Silva, 2001) e Senna occidentalis Link. (Delachiave & Pinho, 2003) e entre 25 e 35ºC para Senna siamea (Lam.) H.S.…”

Section: Resultado E Discussãounclassified

“…O uso do ácido sulfúrico é comum na superação da dormência tegumentar e sua eficiência foi verificada em Senna occidentalis Link. (Delachiave & Pinho, 2003) e Senna macranthera (Colladon) Irwin et Barneby (Santarém & Áquila, 1995;Lemos Filho et al, 1997;Eschiapati-Ferreira & Perez, 1997).…”

Section: Introductionunclassified

Escarificação ácida, temperatura e luz no processo germinativo de sementes de Senna alata (L.) Roxb

Braga

Sousa

Delachiave

2010

Rev. bras. plantas med.

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RESUMO:O objetivo deste trabalho foi determinar o tempo ótimo de escarificação das sementes de Senna alata em ácido sulfúrico e verificar o efeito da temperatura, em condição de luz e escuro, na germinação de sementes dessa espécie. As sementes foram imersas em ácido sulfúrico concentrado por períodos de 0, 15, 30 e 60 minutos, e o teste de germinação realizado em BOD a 25ºC, utilizando quatro repetições de 50 sementes em cada período de tempo, sendo o delineamento estatístico inteiramente casualizado com 4 tratamentos. No segundo experimento, para verificar o efeito da temperatura e da condição de luz mais adequada a germinação, utilizouse temperaturas de 10 a 45ºC, com intervalos de 5ºC, em condição de luz fluorescente branca ou escuro contínuo (gerbox preto). Utilizou-se o delineamento experimental inteiramente casualizado, disposto em esquema fatorial 8x2, com 4 repetições, de 50 sementes cada. Em todos os testes as avaliações da porcentagem e índice de velocidade de germinação foram feitas diariamente, durante 10 dias, onde as sementes foram consideradas germinadas quando apresentaram 2 mm de raiz. Os dados foram submetidos à análise de variância e as médias comparadas pelo teste de Tukey a 5% de probabilidade. A escarificação do tegumento com ácido sulfúrico durante 60 minutos, foi ideal para as sementes de Senna alata, por proporcionar maiores valores na porcentagem e velocidade de germinação. A germinação ocorre entre 15 e 40ºC, sendo consideradas fotoblásticas neutras entre 20 e 40ºC e fotoblásticas negativas preferenciais a 15ºC. O melhor desempenho germinativo foi obtido nas temperaturas de 25, 30 e 35ºC, onde ocorreram maior porcentagem e velocidade de germinação.Palavras-chave: fedegoso-gigante, germinação, dormência, regime de temperatura, fotoblastismo ABSTRACT: Acid scarification, temperature and light on the germination process of Senna alata (L.) Roxb. seeds. The aim of this study was to establish the optimum scarification time for Senna alata seeds in sulfuric acid, as well as to verify the effect of temperature on seed germination for this species under conditions of light and darkness. Seeds were immersed in concentrated sulfuric acid for periods of 0, 15, 30 and 60 minutes, and the germination test was carried out in a BOD chamber at 25ºC, using four replicates of 50 seeds for each time period. Experimental design was completely randomized with 4 treatments. In the second experiment, temperatures from 10 to 45ºC, with 5ºC intervals, were used under conditions of fluorescent white light or continuous darkness (black "gerbox") in order to verify the temperature effect and the most suitable light condition for germination. Experimental design was completely randomized, in an 8x2 factorial arrangement, with 4 replicates of 50 seeds each. In all tests, germination percentage and speed index were daily evaluated for 10 days. Seeds were considered germinated when the radicle length was 2 mm. Data were subjected to analysis of variance and means were compared by Tukey's test at 5% significance. The...

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“…Salinity disrupts crop establishment by decreasing the germination percentage and delaying seedling emergence (Siddiky et al, 2014) and decreases the yield at a later stage (Rahman et al, 2018). Excessive uptake of ions causes toxicity, and reduced water availability between the seeds and the outer environment thereby inhibiting primary root emergence (Delachiave & dc-Pinho, 2003). Chloride and sulfate (Khajeh-Hosseini et al, 2003) salts of sodium and calcium (mainly NaCl and CaSO 4 ) are the major soluble salts contributing to the very high salinity level of soils (Auge et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Effect of salinity on seed germination of some tomato (Lycopersicon esculentum Mill.) varieties

Adilu

Gebre

2021

jaa

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Salinity adversely affects 20-30% of the irrigated area in the world. Tomato is sensitive to salinity. It is one of the most severe abiotic factors of many agricultural crops and it becoming the main problem in Ethiopia. This study was conducted to evaluate the effects of different salinity levels on the seed germination parameters of tomato varieties. It was laid out in a completely randomized design with three replicates. The treatment included four tomato varieties (Sirinka, Weyno, ARP D2, and Roma VF) and five salinity levels (1 dS m-1, 2 dS m-1, 3 dS m-1, 4 dS m-1, and control). Fifty seeds were placed in a Petri dish over a moistened germination paper for germination and seedlings and allowed to grow for 14 days. The germination rate, speed and energy of tomato seeds were significantly (p < 0.001) affected by the combined effect of variety and salinity. The shortest mean germination time, the highest mean germination rate, and the highest speed of germination were recorded in the ARP D2 variety in the control treatment. The lowest first and last days of germination, and the uncertainty of germination were recorded from ARP D2. However, an increase in the days of germination and in the uncertainty of germination, and a decrease in the germination index and total germination percentage trends were observed with increasing salinity levels. The highest level of salinity (4 dS m-1) affected the germination of tomato varieties. Among the four tested tomato varieties, ARP D2 and Roma VF were tolerant to salinity.

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Scarification, temperature and light in germination of Senna occidentalis seed (Caesalpinaceae)

Cited by 18 publications

References 0 publications

Seed dormancy and storage behaviour in tropical Fabaceae: a study of 100 species from Sri Lanka

Seed dormancy and storage behaviour in tropical Fabaceae: a study of 100 species from Sri Lanka

Escarificação ácida, temperatura e luz no processo germinativo de sementes de Senna alata (L.) Roxb

Effect of salinity on seed germination of some tomato (Lycopersicon esculentum Mill.) varieties

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