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Revista Brasileira de Sementes

Print version ISSN 0101-3122

Abstract

MENEZES, Nilson Lemos de; CICERO, Sílvio Moure; VILLELA, Francisco Amaral  and  BORTOLOTTO, Rafael Pivotto. Using X rays to evaluate fissures in rice seeds dried artificially. Rev. bras. sementes [online]. 2012, vol.34, n.1, pp. 70-77. ISSN 0101-3122.  http://dx.doi.org/10.1590/S0101-31222012000100009.

The objective of the present study was to evaluate the efficiency of X-rays in identifying fissures in artificially dried rice seeds and the relationship between damage and seed performance in the germination test. Irrigated rice seeds of the IRGA 417 and IRGA 420 cultivars were harvested with 23.3 and 24.5% water content respectively and submitted to stationary drying treatments at 32, 38, 44 and 50 °C. X-rays were taken of subsamples of 100 seeds for each treatment, using an MX-20 X-ray equipment. The X-rayed seeds were classified from 1 to 3, where 1 corresponded to seeds without fissures, 2 to seeds with non-severe fissures and 3 to seeds with severe fissures. The same X-rayed seeds were planted and on the seventh day the seedlings (normal or abnormal) and dead seeds were photographed and evaluated to verify any relationship between the fissures and physiological potential. Higher drying temperature increased the percentage of fissures in the two cultivars, which can adversely affect their germination. Seeds with fissures can be identified using X-rays.

Keywords : Oryza sativa L; image analysis; seed quality; X-ray images; germination.

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