Effects of panicle temperature, root temperature and nitrogen status on spiklets sterility in rice. (2004)

Gunawardena, T.A Fukai. S

2004

This CRC report presents the results of the project undertaken to investigate the effects of panicle temperature, root temperature and nitrogen status on spiklet sterility in rice. The project undertook three experiments in naturally-lit, temperature-controlled glasshouses on the St Lucia campus of The University of Queensland. The project concluded that the application of N reduced engorged pollen number per anther as a result of competition among tillers. It also stated that results expressed that the detrimental effect of low temperature during microspore development that leads to spikelet sterility, acts mainly through reduced pollen engorgement efficiency. It is also stated that the greatest damage happens from exposure of the panicle to low temperature. Low temperatures for both panicles and roots appeared to have an additive effect in inducing spikelet sterility, while exposure of foliage to low temperature had no effect.