Alterações bioquímicas durante a embebição de sementes de catingueira (Caesalpinia pyramidalis Tul.)

Dantas, B. F.; Correia, J. de S.; Marinho, Lígia Borges; Aragão, Carlos Alberto

doi:10.1590/s0101-31222008000100028

Cited by 19 publications

(12 citation statements)

References 9 publications

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“…The weights of the starch contents in the quiescent seeds of D. nigra in lots I and II were 114.5 and 121.5 mg.g -1 of dry weight, which are low compared to the soluble sugar in lot II (471.2 and 447.6 mg.g -1 DM, respectively). Therefore, it is quite likely that this is not the main carbohydrate reserve in this species, as also observed in the leguminous trees Dalbergia miscolobium, C. peltophoroides and C. pyramidalis (Silva et al, 1998, Corte et al, 2006Dantas et al, 2008a). *Value significant at 5%; ns -value not significant at 5%, by t test.…”

Section: Resultsmentioning

confidence: 80%

Alterations in seed reserves of Dalbergia nigra ((Vell.) Fr All. ex Benth.) during hydration

et al. 2013

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Seed imbibitions is the first stage of the germination process and is characterized by the hydration of tissues and cells and the activation and/or induction of the enzymes responsible for mobilizing reserves for respiration and the construction of new cell structures. The objective of this study was to investigate the alterations in reserve substances during slow hydration of Bahia Rosewood (Dalbergia nigra) seeds in water. Seeds from two different lots (Lot I and II) were placed in saturated desiccators (95-99% RH) to hydrate at 15 and 25 °C until water contents of 10, 15, 20 and 25% were reached. At each level of hydration, changes in lipid reserves, soluble carbohydrates, starch and soluble proteins were evaluated. The mobilization of reserves was similarly assessed in both lots, with no differences being observed between the two hydration temperatures. Lipid contents showed little variation during hydration, while the contents of soluble carbohydrates and starch decreased after the 15% water content level. Soluble proteins showed a gradual tendency to decrease between the control (dry seeds) up to 25% water content.

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Section: Resultsmentioning

confidence: 80%

Alterations in seed reserves of Dalbergia nigra ((Vell.) Fr All. ex Benth.) during hydration

et al. 2013

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“…After approximately 280 hours (right arrow in Figure 1) 10% of seedlings had root protrusion and a sharp increase in seeds water uptake begun. At this stage, embryo starts axis its growth and seedlings newly formed cells require large volumes of water (Dantas et al, 2008a;2008b;Borges et al, 2009;Smiderle et al, 2013). These results showed guava seeds do not have dormancy, because only non-dormant and viable seeds reach phase III of imbibition curve (Bewley et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

“…Seed vigor can be defined as all characteristics of a lot that determine potential for a uniform and rapid emergence and development in a wide range of environmental conditions (Rajjou et al, 2012). Therefore, seeds with higher vigor, as shown by Y85 accession, are able to tolerate abiotic stresses better than those with lower vigor (Dantas et al, 2007), such as Y95 accession (Table 1). Alves et al (2005) concluded that the origin of Mimosa caesalpiniifolia Benth.…”

Section: Resultsmentioning

confidence: 99%

Seed germination of Brazilian guava (Psidium guineense Swartz.)

et al. 2015

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ABSTRACT-Brazilian guava (Psidium guineense Swartz.) is a plant species native from Brazil and present in all Brazilian biomes. This species occurs in the Caatinga biome as a wild fruit that has broad utility and can generate income, as well as provide material for breeding. The objective of this work was to study seed germination of guava accessions collected in two municipalities in Bahia. Seeds imbibition curve was studied. Also, seed germination and seedlings initial growth were evaluated for 44 days on different temperatures (15, 20, 25, 30 and 35 °C), fruit maturation, drying, pre-soaking and priming. Seeds imbibition curve was triphasic in which lag-phase begun after 30 hours imbibition and lasted 256 hours. An effect of guava genotype was observed in seeds physiological quality. Temperatures of 20 and 25 °C were ideal for guava seeds germination. Seeds pre-soaking and priming techniques are feasible to reduce germination time and increase seedling performance.Index terms: genetic resources, Myrtaceae, vigor.Germinação de sementes de araçá (Psidium guineense Swartz.) RESUMO-O araçá (Psidium guineense Swartz) é uma espécie nativa do Brasil e presente em todos os biomas brasileiros. Ocorre na Caatinga de forma silvestre e é uma fruteira que apresenta ampla utilidade, podendo gerar renda além de fornecer material para o melhoramento genético. O objetivo deste trabalho foi estudar o processo germinativo de sementes de quatro acessos de araçá coletados em dois municípios da Bahia. Foi estudada a curva de embebição das sementes, bem como o efeito de diferentes temperaturas (15, 20, 25, 30 e 35°C), estágio de maturação, secagem, pré-embebição e condicionamento osmótico na germinação, vigor e crescimento inicial de plântulas dos acessos de araçá. A curva de embebição das sementes se mostrou trifásica, na qual a fase-lag iniciou após 30 h de embebição e durou 256 h. Foi observado um efeito dos genótipos na qualidade fisiológica das sementes de araçá. As temperaturas de 20 e 25 °C foram ideais para a germinação de sementes de araçá. As técnicas de pré-embebição e condicionamento osmótico das sementes reduziram o tempo de germinação e aumentaram o desempenho das sementes.Termos para indexação: recursos genéticos, Myrtaceae, vigor.

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“…This triphasic pattern of germination was also observed in other seeds native of Caatinga and Cerrado, such as Poincianella pyramidalis (Tul.) L.P. Queiroz (Dantas et al, 2008a) and Schinopsis brasiliensis Engel. (Dantas et al, 2008b).…”

Section: Resultsmentioning

confidence: 99%

“…Electrical conductivity (dS.m Although seeds of various species from Caatinga are highly tolerant to salt stress (Dantas and Ramos, 2012), seeds of Z. sylvatica have a low tolerance threshold to salt stress and can be considered a glycophyte with moderate tolerance to NaCl. The reduction in germination percentage with increasing salinity stress for Z. sylvatica seeds (Figure 6) may be associated with toxic levels of ion concentration within seeds (Tobe et al, 2000), since the osmotic potential of a 8dS.m -1 NaCl solution at 25 o C is -0.32 MPa (Souza et al, 2010), which did not affect seed germination for this species ( Figure 5).…”

Section: Temperature (ºC)mentioning

confidence: 99%

Caracterization of seed germination of Zephyranthes sylvatica (Mart.) Baker (Amarilidacea)

et al. 2014

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-Zephyranthes sylvatica is a beautiful lily, endemic from the Brazilian Caatinga. Although it has a great ornamental potential, little is known about this species, especially regarding its seeds germination process. Aiming to characterize the germination of Z. sylvatica seeds, we studied its imbibition curve, optimum temperature and substrate for germination and seedling emergence, osmotic and salt stress tolerance, as well as the tolerance to frosting/ defrosting, which indicates long term cryostorage potential. The germination of Z. sylvatica presents a triphasic model of imbibition, in which the primary root protrusion occurs after 72 hours of imbibition. The ideal conditions for evaluating seed germination of Z. sylvatica is 25 °C, in paper rolls. These seeds are highly tolerant to osmotic stress, but not to salt stress. Z. sylvatica seeds can be cryopreservated without loss of germination and seed vigor.Index terms: caatinga, lily, vigor, propagation.Caracterização da germinação de lírio-da-caatinga (Zephyranthes sylvatica (Mart.) Baker (Amarilidacea)RESUMO -Zephyranthes sylvatica é um lindo lírio, endêmico da Caatinga brasileira. Embora tenha um grande potencial ornamental, pouco se sabe sobre esta espécie, especialmente em relação ao processo germinativo de suas sementes. Visando caracterizar a germinação de sementes de Z. sylvatica, estudou-se a sua curva de embebição, temperatura e substrato ótimos para a germinação e emergência das plântulas, tolerância aos estresses osmótico e salino, assim como a tolerância ao congelamento / descongelamento que indica o potencial crioarmazenamento a longo prazo. Baseado nos dados obtidos pode-se concluir que a germinação de Z. sylvatica apresenta modelo trifásico de embebição, em que a protrusão da raiz ocorre após 72 horas de embebição. As condições ideais para a avaliação da germinação das sementes de Z. sylvatica é de 25 °C, em rolos de papel. Estas sementes são altamente tolerantes ao estresse osmótico, mas não ao estresse salino. Sementes de Z. sylvatica podem ser criopreservadas sem perda de germinação e vigor das sementes.Termos para indexação: caatinga, lírio, vigor, propagação.1

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Alterações bioquímicas durante a embebição de sementes de catingueira (Caesalpinia pyramidalis Tul.)

Cited by 19 publications

References 9 publications

Alterations in seed reserves of Dalbergia nigra ((Vell.) Fr All. ex Benth.) during hydration

Alterations in seed reserves of Dalbergia nigra ((Vell.) Fr All. ex Benth.) during hydration

Seed germination of Brazilian guava (Psidium guineense Swartz.)

Caracterization of seed germination of Zephyranthes sylvatica (Mart.) Baker (Amarilidacea)

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