Avaliação citoquímica durante a germinação de sementes de sorgo envelhecidas artificialmente e osmocondicionadas, sob salinidade

Oliveira, Alexandre Bosco de; Alencar, Nara Lídia Mendes; Gallão, Maria Izabel; Gomes-Filho, Enéas

doi:10.1590/s1806-66902011000100028

Cited by 7 publications

(9 citation statements)

References 5 publications

(6 reference statements)

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“…Disruption of ion balance and increased reactive oxygen species lead to cell integrity and homeostasis disruption; the latter acts on different chemical components of the seed, disrupting the metabolic cycle. All these conditions lead to loss of seed viability or reduced performance [19][20][21][22]. The study findings were similar to those of the previous studies.…”

Section: Discussionsupporting

confidence: 89%

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Maternal Environment and Priming Agents Effect Germination and Seedling Quality in Pitaya under Salt Stress

Kenanoğlu,

Mertoğlu,

Sülüşoğlu Durul

et al. 2023

Horticulturae

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Lack of water and salinity are common problems in many parts of the world. Therefore, some types of cacti can present as promising crops. Therefore, the ability of cactus species to survive and adapt under natural stress conditions should be evaluated. The experiment was aimed at evaluating the effect of salt stress on germination and emergence of pitaya seeds obtained from different species (Hyloceresu undatus (Haw.) Britton and Rose and Hylocereus polyrhizus (Lem.) Britton and Rose), priming with plant growth regulators, namely salicylic acid (SA), oxalic acid (OA) and mepiquat chloride (MC). The experiment had a completely randomized design with a 2 × 4 × 3 factorial scheme corresponding to two pitaya cultivars (white- and red-fleshed), four NaCl concentrations (0, 2500, 5000 and 10,000 ppm), and three PGRs (150 ppm/MC, SA, OC). According to the results, the maternal environment of the seed was important in salt stress resistance, while seeds matured in the environment with red fruit flesh were more tolerant to salt stress. Although Pitaya species are relatively salt-tolerant, growth (about 30%) was significantly reduced above 2500 ppm and germination (about 45%) above 5000 ppm. Germination percentage stood out as the most important trait determining seed quality and had positive effects on the germination stress tolerance index (r: 0.63), seedling length (r: 0.74) and fresh seedling weight (r: 0.56). This is the first study of how maternal environment affects germination and seedling quality under saline conditions in Hylocereus. The results obtained may contribute to pitaya cultivation and breeding.

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Section: Discussionsupporting

confidence: 89%

“…Enzyme activity is impaired, and metabolic activity is restricted. Increased reactive oxygen species disrupt cell integrity and homeostasis [20][21][22]. For these reasons, it is not possible to maintain production sustainably.…”

Section: Introductionmentioning

confidence: 99%

Maternal Environment and Priming Agents Effect Germination and Seedling Quality in Pitaya under Salt Stress

Kenanoğlu,

Mertoğlu,

Sülüşoğlu Durul

et al. 2023

Horticulturae

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“…Silva et al (2008) verificaram que, em sementes de trigo, ocorre alteração nos constituintes celulares quando submetidas a estresse salino com NaCl. A toxidez causada pelo estresse salino em sementes de sorgo pode resultar em alterações morfológicas e citoquímicas (OLIVEIRA et al, 2011). De acordo com os resultados observados neste estudo, é possível que o KCl e o NaCl, sejam fitotóxicas para o repolho, e possam provocar alterações celulares e prejudiquem os processos fisiológicos da germinação e dos desenvolvimento de plântulas, destacadamente nas sementes do lote de baixa viabilidade.…”

Section: Salunclassified

Physiological Quality of Cabbage Seed With High and Low Viability Under Salt Stress

Bernardes

Mengarda

Lopes³

et al. 2015

Nucleus

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Objetivou-se, com este trabalho, avaliar a qualidade fisiológica de lotes de sementes de repolho de alta e baixa viabilidade sob salinidade. A viabilidade dos lotes foi avaliada pelo teste de tetrazólio, sendo caracterizados como lote 1alta viabilidade, e lote 2baixa viabilidade. As sementes foram submetidas a dois sais, NaCl e KCl, em diferentes potenciais osmóticos: 0,0 (controle); -0,2; -0,4; -0,6; -0,8 e -1,0 MPa. A semeadura foi feita em placas de Petri forradas com papel germitest, mantidas em câmara de germinação tipo BOD regulada à temperatura de 25 °C. As características avaliadas foram: germinação, índice de velocidade de germinação, massa fresca, massa seca, comprimento da parte aérea e da raiz das plântulas. Redução no potencial osmótico reduz a germinação e afeta negativamente o vigor das sementes de repolho de ambos os lotes; o KCl é mais agressivo, afetando a germinação e o desenvolvimento das plântulas em concentrações menores que o NaCl. As sementes de repolho de alta viabilidade apresentam menor sensibilidade ao estresse salino.

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“…Lopes et al (2013) also observed reduction of these protein bodies along the germination in seeds of Jatropha. The presence of XP stained globular protein bodies was also observed in seeds of Sorghum bicolor (OLIVEIRA et al, 2011) and Cereus jamacaru (ALENCAR et al, 2012).…”

Section: Resultsmentioning

confidence: 87%

Mobilization of Reserves of Sunflower Seeds Under Saline Stress

Alencar¹,

Otaviano²,

Gomes-Filho³

2017

Anais Do IV Inovagri International Meeting - 2017

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SUMMARY:This study aimed to evaluating salt stress effects on germination of BRS-122 sunflower seeds, through determination of reserve mobilization by cytochemical and biochemical methods. The experiment consisted in the seed germination in control treatment (distilled water) and salt treatment (200 mM NaCl) in germination chamber (BOD) at 25 °C and 12h photoperiod of light. In lipid determination, there was an accumulation of these reserves in cotyledons, in salt conditions, demonstrating a delay in the use of these reserves. Regarding to protein mobilization, a 21.2% reduction was observed for these contents in control treatment at 2DAI, and on other hand, at the final germination period, it was verified an accumulation of proteins. The Na + content was higher in plants exposed to NaCl, whereas K + content was reduced over time in control treatment, however, in salt conditions, there was an accumulation of this ion. We assumed that the salinity exposure in sunflower seeds led to Na + ion accumulation, which negatively affected the reserve mobilization of these seeds. KEYWORDS: Germination, Helianthus annus L., salinity MOBILIZAÇÃO DE RESERVAS DE SEMENTES DE GIRASSOL SUBMETIDAS AO ESTRESSE SALINORESUMO: Nesse trabalho, objetivou-se estudar os efeitos do estresse salino sobre a germinação de sementes de girassol BRS-122, avaliando a mobilização de reservas ao longo da germinação por meio da determinação de compostos de reserva por métodos citoquímicos e bioquímicos. O experimento consistiu na germinação das sementes em tratamento controle (água destilada) e tratamento salino (200 mM de NaCl) em câmara de germinação (BOD) com temperatura de 25°C e fotoperíodo de 12h. Na determinação de lipídios, observou-se que no tratamento salino houve um acúmulo de lipídios nos cotilédones, demonstrando retardo na utilização dessas reservas. Em relação a mobilização proteica dos cotilédones para o eixo

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Avaliação citoquímica durante a germinação de sementes de sorgo envelhecidas artificialmente e osmocondicionadas, sob salinidade

Cited by 7 publications

References 5 publications

Maternal Environment and Priming Agents Effect Germination and Seedling Quality in Pitaya under Salt Stress

Maternal Environment and Priming Agents Effect Germination and Seedling Quality in Pitaya under Salt Stress

Physiological Quality of Cabbage Seed With High and Low Viability Under Salt Stress

Mobilization of Reserves of Sunflower Seeds Under Saline Stress

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