Seed reserve composition and mobilization during germination and early seedling establishment of Cereus jamacaru D.C. ssp. jamacaru (Cactaceae)

Alencar, Nara Lídia Mendes; Innecco, Renato; Gomes-Filho, Enéas; Gallão, Maria Izabel; Alvarez‐Pizarro, Juan Carlos; Prisco, José Tarquı́nio; Oliveira, Alexandre Bosco de

doi:10.1590/s0001-37652012000300024

Cited by 45 publications

(35 citation statements)

References 23 publications

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“…Oleic acid was also the most common monounsaturated fatty acid found in samples of several species of vegetables and cereals, and their amount was decreased in most of the germinated samples (Megat-Rusydi et al 2011). Furthermore, it is possible that the mobilization and reduction of the lipids during seed germination of C. jamacaru related by Alencar et al (2012) may be due to the consumption of oleic acid during the processes of germination and formation of the mandacaru seedlings. Thus, the oleic acid that is found in larger quantities in the seeds of mandacaru of both localities Maringá and Picos may explain the non significant difference in the rate of seed germination from the South and Northeast regions of Brazil.…”

Section: Resultsmentioning

confidence: 99%

“…We suspect that the procedure used to germinate seeds of C. peruvianus from the South region of Brazil may be also used to seed germination of the mandacaru plants from Northeast. Therefore, one of our aims on this study was to analyze and compare the germination rates of seeds from mandacaru plants maintained in the two contrasting edaphoclimatic regions (Northeast and South of Brazil), and moreover investigate differences in the concentration and chemical composition (Alencar et al 2012). The pattern of isozymes related with the fatty acids metabolism in seeds, such as lipases, was also analyzed.…”

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confidence: 99%

“…The lipid reserves are responsible by the seeds metabolism and are intrinsic factors that may be associated with seed germination. Lipids were the main reserve mobilized during seed germination in C. jamacaru because their levels were strongly reduced after seed germination (Alencar et al 2012). Thus, the chemical composition of fatty acids may be used to explain an equal or differential rate of germination.…”

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confidence: 99%

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Genetic and chemical diversity in seeds of cactus mandacaru (Cereus sp.) from two edaphoclimatic regions contrasting

Bevilaqua

Santana-Filho

Mangolin

et al. 2015

An. Acad. Bras. Ciênc.

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The purpose of this study was to evaluate the chemical, physiological and genetic differences in seeds of cactus of the Cereus genus (mandacaru) cultivated in the Northeast (Picos, State of Piauí) and Southern (Maringá, State of Paraná) regions of Brazil. Over a period of eight days, temperatures of 25°C and 30°C were equally efficient for the germination of all the seeds. Oleic acid (C18:1) was the most common fatty acid found in the seeds collected in the Southern (41%) and Northeast (45.5%) regions. The analysis of lipases indicated that seeds from Maringá have high mean observed and expected heterozygosities and that seeds from Picos have a higher number of alleles per loci. Therefore, the seeds of mandacaru from the semiarid region of Northeast as well as the seeds from the South (the two contrasting regions of Brazil) are promising with regards to the preservation of the biodiversity in the genome of mandacaru. The low genetic identity between mandacaru seeds from Maringá and Picos at Lipase-5 locus analysis (I = 0.77) suggests that the mandacaru plants from Maringá and Picos may correspond to two species: C. peruvianus and C. jamacaru, respectively.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

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Genetic and chemical diversity in seeds of cactus mandacaru (Cereus sp.) from two edaphoclimatic regions contrasting

Bevilaqua

Santana-Filho

Mangolin

et al. 2015

An. Acad. Bras. Ciênc.

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“…Enzymes of starch and protein digestion i.e., α, β-amylase and protease are accountable for breakdown and mobilization of these major reserve materials of seeds (Alencar et al, 2012). The maximum retarded activity of enzymes was observed when Cd was applied @ 450 mg/kg while both the chelators especially OA helped in relieving the toxic effects of Cd on both hydrolytic enzymes.…”

Section: Discussionmentioning

confidence: 99%

Exogenous Application of Ethylenediaminetetraacetic Acid and Oxalic Acid Improve the Seed Germination and Enzymes Activities of Sunflower (Helianthus annuus) Under Cadmium Stress

Sadiq¹,

Hussain²,

Ashraf³

et al. 2015

IJAB

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To cite this paper: Sadiq, R., M. Hussain, M. Ashraf and K.U. Rehman, 2015. Exogenous application of ethylenediaminetetraacetic acid and oxalic acid improve the seed germination and enzymes activities of sunflower (Helianthus annuus) under cadmium stress. AbstractThe study was conducted to examine the deleterious effects of cadmium (Cd) on metabolic enzymes and their end products during seed germination and the effect of ethylenediaminetetraacetic acid (EDTA) and oxalic acid (OA) in easing the Cd toxicity in two sunflower hybrids (Hysun-33 and FH-533). To accomplish this, a pot experiment was carried out in small sandfilled plastic pots under normal environment temperature (28±2ºC). Seeds of both sunflower hybrids were exposed to Cd levels (250 and 450 mg/kg) alone and in combination of optimized level of chelating agents EDTA and OA (each at the rate of 1g/kg) at the time of sowing. The enzymes activities of two germinating hybrids were recorded over time from 24 to 120 h after sowing. When Cd was applied alone it reduced the germination rate, enzymes activities and total soluble sugars contents. Mobilization of stored proteins and amino acids were also suppressed in germinating seeds of both hybrids. However, application of EDTA and OA in combination with Cd improved the germination rate of seeds by surpassing the biochemical metabolism and enhanced the activities of α-amylase and protease revealing the ameliorating effect to Cd toxicity. Results revealed that minimum values of all the attributes are obtained at 450 mg/kg of Cd level, while chelators treatments proved effective in relieving Cd stress of which OA had 10% more pronounced germination percentage than EDTA and 30% more as compared to control. Interactive studies showed that both the chelators detoxify the 250 mg/kg of Cd more as compared to 450 mg/kg of Cd. Results clearly indicated that sunflower hybrid Hysun-33 showed greater activities of two hydrolyzing enzymes and efficient mobilization of reserved sugars and proteins than hybrid FH-533 under Cd stress, so it can be grown on Cd contaminated soils for higher plant productivity. Thereafter EDTA and OA could be supportive to improve the seed germination security in Cd polluted soil.

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“…Paula et al (2016) found that lipids and protein bodies inside the endosperm cells of Morinda citrifolia served as the main reserve components. In Cereus jamacaru, Alencar et al (2012) discovered that lipids were the main reserve in seeds that were stored in cotyledons while soluble sugar and starch were the minor reserves. In Jatropha curcas seeds, it was determined that the endosperm lipids represent the most abundant reserve and proteins were the secondmost important reserve (Alencar et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Histochemical changes during the ontogeny of malagueta and biquinho pepper seeds

Abud

Araújo

et al. 2017

Acta Sci. Agron.

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ABSTRACT. This study aimed to evaluate the structural changes and reserve deposition of malagueta and biquinho pepper seeds and to determine their chemical composition during ontogeny. The fruits were collected 25, 40, 55, 70, 85, and 100 days after anthesis (DAA). After collection, the seeds were extracted and fixed in FAA 50 and then stored in 70% ethanol. Subsequently, the seeds were embedded in methacrylate (Historesin) and sectioned with a microtome. The sections were stained with Toluidine blue O for anatomical analysis and Xylidine Ponceau, Periodic acid Schiff (PAS) and Lugol's iodine solution for histochemical analysis. Sections were made using a cryomicrotome for acid phloroglucinol staining and Sudan III tests. Progressive lignification of the seed coat cells was observed. Proteins and lipids were the main reserve compounds of malagueta and biquinho pepper seeds stored in the embryo and endosperm. Starch served as a transient reserve during embryo development. The lipid reserves were observed in embryo and endosperm cells from 25 until 100 DAA. At 100 DAA, the protein contents of the malagueta and biquinho pepper seeds were 0.33 and 0.62 g g Alterações histoquímicas durante a ontogenia de sementes de pimenta malagueta e biquinho RESUMO. Objetivou-se acompanhar as alterações estruturais, a deposição de reservas e determinar a composição química de sementes de pimenta malagueta e biquinho durante a sua ontogênese. Frutos foram coletados aos 25, 40, 55, 70, 85 e 100 dias após a antese (DAA). Após a coleta, as sementes foram extraídas e fixadas em FAA 50 e, armazenadas em álcool 70%. Posteriormente, foram incluídas em Historesina Metacrilato e seccionadas em micrótomo. Os cortes foram submetidos à coloração com Azul de Toluidina, para análise anatômica e a análise histoquímica realizada com XylidinePonceau, Periodic acid Schiff (PAS) e Lugol. Para reação com Floroglucina Ácida e Sudam III, foram realizados cortes em criomicrótomo. Verificou-se que houve lignificação progressiva das células do tegumento. As proteínas e os lipídeos constituem os principais compostos de reserva das sementes de pimenta malagueta e biquinho, estocados no embrião e endosperma. O amido constitui uma fonte transitória de reserva para o desenvolvimento do embrião. As reservas lipídicas são observadas nas células do embrião e do endosperma dos 25 aos 100 DAA. Aos 100 DAA, as sementes de pimenta malagueta e biquinho apresentam concentração de proteínas de 0,33 e 0,62 g g -1 M.S. e lipídeos de 0,30 e 0,25 g g -1 M.S. respectivamente.

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Seed reserve composition and mobilization during germination and early seedling establishment of Cereus jamacaru D.C. ssp. jamacaru (Cactaceae)

Cited by 45 publications

References 23 publications

Genetic and chemical diversity in seeds of cactus mandacaru (Cereus sp.) from two edaphoclimatic regions contrasting

Genetic and chemical diversity in seeds of cactus mandacaru (Cereus sp.) from two edaphoclimatic regions contrasting

Exogenous Application of Ethylenediaminetetraacetic Acid and Oxalic Acid Improve the Seed Germination and Enzymes Activities of Sunflower (Helianthus annuus) Under Cadmium Stress

<b>Histochemical changes during the ontogeny of <i>malagueta</i> and <i>biquinho</i> pepper seeds

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