Volume 46, Issue 3
September 1957, pages 149-228
pp 149-154 September 1957
pp 155-169 September 1957
The changes taking place on the population of fungi internally borne in rice seeds during storage over relative humidity levels of approximately 10, 25, 50, 75, 90 and 100% were studied. Over 10, 25, and 50% relative humidity levels there was a decrease in moisture content, but there was no deterioration in germinability within the period studied.
During storage over relative humidity levels of 75, 90 and 100% there was deterioration in germinability of seeds following increase in their moisture content.
No moulds could be isolated from the seeds stored over 75 and 90% relative humidity even after they had lost their vaibility during the course of the tests. Moulds were, however, isolated from seeds which had lost their viability during the storage over 100% R.H. level.
Deterioration in germinability was followed by decrease and disappearance of the normal internally borne fungi and this was followed by colonisation of the rice grain by principallypenicillia in the case of seeds stored over water (i.e., over 100% R.H.).
It is concluded that mould activity has no direct relation to the inactivation of embryo in rice seeds in storage under wet and humid conditions.
pp 170-228 September 1957