克服休眠的方法会影响秋葵种子的生理品质吗?

IF 0.8 Q3 AGRICULTURE, MULTIDISCIPLINARY Pesquisa Agropecuaria Tropical Pub Date : 2023-01-01 DOI:10.1590/1983-40632023v5375797
Igor Souza Stochi, Martha Freire da Silva, Cleverton Timóteo de Assunção, Victor Hugo Borsuk Damião
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引用次数: 0

摘要

秋葵种子被皮造成的生理休眠是秋葵生产的主要障碍之一。虽然已经提出了几种克服被皮休眠的方法,但对它们对种子生理品质的影响知之甚少。因此,本研究旨在验证克服休眠方法的有效性(控制-不处理;预浸泡-种子在30℃的水中浸泡6小时;热疗-在60℃的水中浸泡3分钟;干热-烤箱在70ºC, 5分钟;热冲击—在30℃的水中浸泡30分钟,然后在5℃的水中浸泡24小时;沙蚀作用(种子与沙粒摩擦20 min),并分析其对秋葵种子生理品质的影响。处理后,获得种子外种皮图像,测定种子含水率、首次萌发数、发芽率、出苗率、萌发速度指数和幼苗长度。预浸泡、热疗法和热休克的处理可以去除chalaza区域的细胞层,允许更大的吸水性,并显示出有效克服休眠,而不影响种子的生理品质。另一方面,干热处理会影响秋葵种子的活力。
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Do methods for overcoming dormancy affect the physiological quality of okra seeds?
ABSTRACT One of the main obstacles in the okra production is the physical dormancy imposed by the tegument of the seeds. Although several methods for overcoming tegumentary dormancy have been proposed, little is known about their effect on the physiological quality of seeds. Thus, this study aimed to verify the effectiveness of methods for overcoming dormancy (control - no treatment; pre-soaking - seed soaking in water at 30 ºC, for 6 h; thermotherapy - immersion in water at 60 ºC, for 3 min; dry heat - oven at 70 ºC, for 5 min; thermal shock - immersion in water at 30 ºC, for 30 min, followed by 5 ºC, for 24 h; and sand scarification - friction between seeds and sand for 20 min), as well as to analyze their impacts on the physiological quality of okra seed lots. After the treatments were applied, images of the outer seed coat were obtained and the moisture content of the seeds, first germination count, germination, emergence, germination speed index and seedling length were measured. The treatments of pre-soaking, thermotherapy and thermal shock remove cell layers in the chalaza region, allowing a greater water absorption and showing to be efficient in overcoming dormancy, without affecting the physiological quality of the seeds. On the other hand, the dry heat treatment can affect the vigor of okra seeds.
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来源期刊
Pesquisa Agropecuaria Tropical
Pesquisa Agropecuaria Tropical AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
1.40
自引率
20.00%
发文量
26
审稿时长
20 weeks
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