Physical quality of seeds of Moquiniastrum polymorphum

Abstract

This study aimed to analyze the physical properties of the seeds of Moquiniastrum polymorphum when processed by mini-SAS, X-ray and seed blower systems. The seeds were purchased from Seeds Caiçara, located in Penápolis-SP. After purchase, the seed lot was characterized by standard tests. In the X-ray test the seeds were classified according to their internal morphology as filled, unfilled or malformed. The seed blower was set at six opening settings, resulting in light and heavy fractions. The evaluations were performed by weighing the seeds that remained in the blower (heavy fraction) and by the amount of filled seeds indicated by the X-ray test. The germination tests were composed of four replicates of 50 seeds. The mini-SAS was used for external evaluation. It was concluded that the combined use of the seed blower and the X-ray test was efficient for the evaluation and determination of the physical quality of the seeds of M. polymorphum. The seed blower at opening settings 5 resulted in the best lot quality. The external parameters were not able to qualitatively evaluate the seeds of M. polymorphum.

Parameters based on X-ray images to assess the physical and physiological quality of Leucaena leucocephala seeds

“…Therefore, low moisture content of the seeds used in the X-ray test is important to obtain radiographs with greater detailing of the internal structures of the seed. In studies conducted with X-ray analysis of seeds of Moquiniastrum polymorphum (Faria et al, 2018), Anacardium othonianum (Silva et al, 2017), Senna multijuga (Marchi;Gomes Junior, 2017), Terminalia argentea (Gomes et al, 2014), and Crotalaria juncea (Arruda et al, 2016), it was possible to visualize seed parts with moisture contents from 8% to 12%. Other factors related to seed constitution may also affect the detailing of internal structures on the radiograph that is generated (Arruda et al, 2016).…”

ASSESSMENT OF THE PHYSICAL AND PHYSIOLOGICAL QUALITY OF Piptadenia gonoacantha SEEDS (MART.) J. F. MACBR. USING IMAGE ANALYSIS

“…As observed by the automated physical analysis, the lots with higher values of tissue density, fi lling, and solidity, presented higher germination and vigor. Similarly, the direct relation between tissue density and / or fi lling with the physiological quality of seeds has already been observed both in forest species such as L. leucocephala (Medeiros et al, 2018), M. polymorphum (Faria et al, 2019) and M. oleifera (Noronha et al, 2019), and in other agricultural species such as tomato ( Borges et al, 2019) and Jatropha curcas (Medeiros et al, 2020).…”

“…Studies with radiographic images of seeds and automated analysis of seedlings have been shown to be effi cient in identifying and determining several physical and physiological descriptors in seeds of forest species, such as Terminalia argentea (Gomes et al, 2014), Platypodium elegans (Gomes et al, 2016), Moringa oleifera (Noronha et al, 2018), Leucaena leucocephala (Medeiros et al, 2018;Medeiros et al, 2019), Moquiniastrum polymorphum (Faria et al, 2019) and others. Seed viability is not compromised when subjected to X-ray analysis, due to the low radiation intensity to which the seeds are exposed.…”

Análise morfométrica e por técnica de raios–X do fruto e semente, e avaliação das características físico-químicas, microbiológicas e morfológicas das farinhas de Hymenaea stigonocarpa Mart. Ex Hayne

“…Foi possível observar detalhes das estruturas internas das sementes avaliadas, como o embrião Figura 1 prancha (A), os cotilédones Figura 1 prancha (B). Pode-se observar que todas as radiografias das sementes apresentam-se cheias, tornando as imagens com maior nitidez, isso se deve a densidade dos tecidos internos que de acordo com Faria et al (2018), impede a transposição da corrente de raios -X incidido, bem como, possibilita a identificação de danos que podem ocorrer e inviabilizar a germinação como na Figura 1 prancha (C), fratura em um dos cotilédones.…”

“…O uso da técnica com raios -X em sementes de H. stigonocarpa apresenta grande interesse para projetos de reintrodução desta espécie nos ambientes de Cerrado, visto que, o uso dos frutos deste domínio em alimentos vem ganhando apreço pela sociedade que procura por alimentos funcionais mais saudáveis, com isso, o processo de seleção de sementes torna-se necessário evitando assim o uso de sementes com deformações e mal preenchidas inviabilizando a produção em larga escala de plantio. Faria et al (2018), avaliando imagens radiográficas das sementes de M. polymorphum encontraram tempo ideal de 16 segundos e configuração energética dos raios -X em 26 kV. No estudo realizado por Masetto et al (2007), os pesquisadores avaliaram as sementes de E. pleurantha onde obtiveram imagens com nitidez em 60 segundos e 50 kV.…”