Radiographic image analysis of Anacardium othonianum Rizz submetidos a secagem

Studies evaluating the internal morphology and seed quality of native species are essential for successful conservation programs. Our aim was to verify the efficiency of X-ray imagery in evaluating cashew-tree-of-the-cerrado (Anacardium othonianum Rizz.) achene viability after desiccation. The achen...

Full description

Saved in:
Bibliographic Details
Published in:Acta scientiarum. Agronomy Vol. 39; no. 2; p. 235
Main Authors: da Silva, Lilian Abadia, Sales, Juliana de Fatima, Neves, Jose Maria Gomes, dos Santos, Heloisa Oliveira, Silva, Glicelia Pereira
Format: Journal Article
Language:Spanish
Published: Universidade Estadual de Maringa 01-04-2017
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Studies evaluating the internal morphology and seed quality of native species are essential for successful conservation programs. Our aim was to verify the efficiency of X-ray imagery in evaluating cashew-tree-of-the-cerrado (Anacardium othonianum Rizz.) achene viability after desiccation. The achenes were collected at 12% water content (w.b.) and dried in silica gel until they reached 10, 8, 6, and 4% (w.b.). The fruit morphology and the quality of the seeds were evaluated by X-ray test together with vigor, electrical conductivity and emergence tests. Achenes with different water contents were exposed to an Xray machine at 18 kV for 11 s and were thereafter submitted to emergence tests. The images were analyzed, and the achenes were classified based on internal morphology as completely full, malformed, or empty. These results were compared to those from the emergence tests. The statistical design was a complete randomized factorial (5 x 3). Desiccation to 4% (w.b.) did not damage or modify the internal structures. Xray was efficient in evaluating the internal morphology and detecting achene quality, making it possible to remove empty and abnormal fruit and form vigorous seed lots, reducing the cost of storage and bedding plant production for this native species. Keywords: X-Ray, fruit tree, cerrado, desiccation, internal morphology. Estudos referentes a avaliacao da morfologia interna e da qualidade de sementes de especies nativas sao de fundamental importancia para o sucesso dos programas de conservacao. Objetivou-se com este estudo verificar a eficiencia do teste com raios X na avaliacao da viabilidade de aquenios de caju-dearvore-do -cerrado (Anacardium othonianum Rizz.) submetidos a secagem. Para tal, aquenios de A. othonianum Rizz foram coletados com 12% (b.u.) e submetidos a secagem em silica gel ate a obtencao dos teores de agua de 10, 8, 6 e 4% (b.u.). Os frutos foram avaliados quanto a morfologia interna e qualidade fisica pelo teste de raios X, e o vigor das sementes pelos testes de germinacao, condutividade eletrica e emergencia de plantulas. Para a obtencao das imagens radiograficas, aquenios com diferentes teores de agua foram expostos a radiacao em um aparelho de raios X digital "Faxitron HP", MX-20 a intensidade de 18 kV por 11 segundos, e posteriormente foram submetidos ao teste de emergencia. As imagens radiograficas foram analisadas e os aquenios classificados de acordo com a morfologia interna em tres categorias: Cheios, mal formados e vazios. O delineamento estatistico utilizado foi o inteiramente casualizado em esquema fatorial (5 x 3). A secagem dos frutos ate 4% (b.u.) nao danificou ou alterou as estruturas internas dos aquenios. O teste de raios X e eficiente na avaliacao da morfologia interna e na deteccao da qualidade de aquenios de A. othonianum Rizz, possibilitando a separacao de aquenios vazios ou com anormalidades embrionarias e permite a formacao de lotes de sementes mais vigorosas, reduzindo os custos tanto de armazenamento quanto os programas de producao de mudas desta especie nativa. Palavras-chave: raios X, frutos, cerrado, secagem, morfologia interna.
ISSN:1679-9275
DOI:10.4025/actasciagron.v39i2.32484