Dormancy of safflower seeds: effect of storage and cold stratification

Oba, Guilherme Cardoso; Goneli, André Luís Duarte; Masetto, Tathiana Elisa; Filho, César Pedro Hartmann; Patricio, Vinicius Souza; Sarath, Karina Laís Leite

doi:10.1590/2317-1545v39n4181244

Cited by 6 publications

(6 citation statements)

References 16 publications

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“…The collected samples from each drying treatment were subdivided at each storage period into two equivalent portions, one of which directly submitted to the germination test. The other portion was previously subjected to the cold stratification method in a substrate moistened with distilled water at 10 °C for five days in the dark (Oba et al, 2017), aiming to overcome seed dormancy. After this period, seeds were submitted to the germination test.…”

Section: Evaluation Of Seed Physiological Qualitymentioning

confidence: 99%

Artificial drying of safflower seeds at different air temperatures: effect on the physiological potential of freshly harvested and stored seeds

et al. 2019

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The air temperature used in the drying process can determine the initial physiological quality and storage potential of a seed lot, which is the object of this study. Safflower seeds, harvested at a moisture content of 25.8%, were subjected to drying in an experimental dryer at air temperatures of 40, 50, 60 and 70 °C until reaching a moisture content of 6.6 ± 0.6%. Immediately upon drying and every 60 days after that, up to 240 days of storage under uncontrolled conditions, seed samples were collected to determine physiological quality. Increasing drying air temperature resulted in higher water removal rates, promoting immediate and latent damage to seed physiological quality, evidenced by the reduction in the percentage and speed of root protrusion, first count, and germination, mainly at temperatures of 60 and 70 °C. For the maintenance of safflower seed germination and vigor up to 240 days of storage, it is recommended that drying air temperature does not exceed 40 °C, especially when seeds present moisture contents close to or higher than 25.8% at the drying moment.

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Section: Evaluation Of Seed Physiological Qualitymentioning

confidence: 99%

Artificial drying of safflower seeds at different air temperatures: effect on the physiological potential of freshly harvested and stored seeds

et al. 2019

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“…Freshly harvested safflower seeds may require up to 8 months of storage (an environment with an average temperature of 25 °C and 60% relative humidity) to overcome dormancy (Oba et al, 2017). This characteristic hinders the propagation and management of the crop and raises doubts about the true physiological potential of the seed lots right after harvest.…”

Section: Seeds Productionmentioning

confidence: 99%

“…

Even though this species has been cultivated for hundreds of years and in different countries around the world, safflower seeds show dormancy, which is a characteristic of many species belonging to the Asteraceae family (Dolatabadian and Modarres, 2008;Lachabrouilli et al, 2021). In safflower seeds, dormancy is more pronounced soon after removal from the parent plant, making sowing unfeasible after harvest (Oba et al, 2017).

…”

mentioning

confidence: 99%

Regulation of dormancy break and germination of safflower seeds: the role of GA3, light and cold temperatures

Silva,

Masetto,

Zanzi

et al. 2023

Braz. J. Biol.

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The safflower crop is considered a great alternative for crop rotation since drought tolerance and low production cost are attractive for its choice. However, safflower seeds show dormancy soon after dispersal from the mother plant, making it difficult to successfully establish plants using newly harvested seeds. The influence of temperature, gibberellin and light/dark on dormancy break of safflower seeds during storage were investigated. In a completely randomized design, freshly harvested seeds or stored for 100 and 200 days (paper bag, 20 °C/ 60% UR) were treated with GA3 (0 and 100 µM), at 4, 10 and 25 °C, in the presence and absence of light, during the germination test. Seeds were evaluated for germination percentage, germination speed and seedling survival after 21 days. The temperature of 10 °C, in combination with GA3 (0/100 µM), or light/dark, provided the highest seed germination results, for freshly-harvested seeds and stored seeds. Collectively, these observations indicate that dormancy was not affected by gibberellic acid (100 µM GA3) and the germination results at 21 days were significantly higher, in relation to the use of GA3, under light or dark. Recently harvested seeds could efficiently germinate at 10 °C in the dark, while seeds dry-stored at 20 °C had decreased germination percentages.

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“…Safflower is grown in dry and irrigated areas in the United States, India, Kazakhstan, the Middle East and Africa, and is considered a drought‐tolerant species. The crop is highly valuable and is cultivated in several countries because of its many uses, including medicinal, ornamental and food, and cosmetic uses (Oba, 2017).…”

Section: Introductionmentioning

confidence: 99%

Oil Quality and Yield of Different Carthamus tinctorius Cultivars: Promising Oilseeds for Biodiesel in Semi‐Arid Regions

Silva

Filho

Costa

et al. 2021

J Americ Oil Chem Soc

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In this study, seed productivity and oil content of three safflower genotypes (IMAMT 1750, IMAMT 946 and IMAMT 894) cultivated in the Brazilian semi‐arid region were evaluated to identify which genotype has the best in‐field performance. The acidity and saponification index were evaluated, as well as the efficiency of lipid extraction through thermal analysis, aiming to estimate the species' potential for biofuel production in semi‐arid regions. Field cultivation under semi‐arid conditions lasted for ~75 days and no herbivory were observed on the plants. The IMAMT 894 genotype presented higher seed yield than the other genotypes, IMAMT 1750 presented 34% oil, and IMAMT 946 and IMAMT 894 presented 32% oil with efficient extraction in the Soxhlet system and high oil content and quality; higher than traditionally used crops such as soybean and cotton. The IMAMT 894 genotype showed higher seed productivity, but all three genotypes presented good oil yield and quality for biodiesel production. Oil extraction in the Soxhlet system was efficient since the thermogravimetric analysis showed no oil in the residual biomass after oil extraction.

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Dormancy of safflower seeds: effect of storage and cold stratification

Cited by 6 publications

References 16 publications

Artificial drying of safflower seeds at different air temperatures: effect on the physiological potential of freshly harvested and stored seeds

Artificial drying of safflower seeds at different air temperatures: effect on the physiological potential of freshly harvested and stored seeds

Regulation of dormancy break and germination of safflower seeds: the role of GA3, light and cold temperatures

Oil Quality and Yield of Different Carthamus tinctorius Cultivars: Promising Oilseeds for Biodiesel in Semi‐Arid Regions

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