Radiographic image analysis of Anacardium othonianum Rizz (anacardiaceae) achenes subjected to desiccation
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Universidade Estadual de Maringá
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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 we re evaluated by X-ray test together with vigor, electrical conductivity and emergence tests. Achenes with different water conten ts were exposed to an X- ray machine at 18 kV for 11 s and were thereafter su bmitted to emergence tests. The images were analyzed, and the achenes were classified base d on internal morphology as completely full, malformed, or empty. These results were compared to those from the emer gence tests. The statistica l design was a complete randomized factorial (5 x 3). Desiccati on to 4% (w.b.) did not damage or modify the internal structures. X- ray 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.
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