The Difference in Sterility due to High Temperatures during the Flowering Period among Japonica-Rice Varieties

Lower-Than-Expected Floret Sterility of Rice under Extremely Hot Conditions in a Flood-Irrigated Field in New South Wales, Australia

“…In this way, long basal dehiscence stabilizes pollination (Matsui and Kagata, 2003) even under high temperatures (Matsui et al, 2005). Since insufficient pollination was the main cause of HTIFS in previous studies (Satake and Yoshida, 1978;Matsui et al, 2001), we thought that the cultivar might have been heat tolerant (Matsui et al, 2007).…”

“…In past studies of high-temperature-induced floret sterility in controlled environments, the main cause of sterility was poor pollination (Matsui et al, 2001), especially in intolerant cultivars (Satake and Yoshida, 1978). The main cause of HTIFS in field conditions in China was poor pollination (Tian et al, 2010).…”

“…Air temperatures over 35ºC induce rice floret sterility both in controlled-environment experiments (Satake and Yoshida, 1978;Kim et al, 1996;Matsui et al, 2001;Jagadish et al, 2007) and in the field (Osada et al, 1973;Tian et al, 2010). Some crop scientists therefore project that global warming will make high-temperature-induced floret sterility (HTIFS) an important problem Nakagawa et al, 2004).…”

Climate Change and Population Growth in Timor Leste: Implications for Food Security

“…Jagadish et al (2007) observed that exposure of rice at peak anthesis to 34°C for 1 h at about 1100 h caused sterility, while exposure of rice spikelets to [35°C for 5 days at anthesis induced complete sterility (Satake and Yoshida 1978). In rice, genotypic variation in spikelet sterility at high temperature has been observed in a number of studies (Satake and Yoshida 1978;Matsui et al 2001;Prasad et al 2006), attributed to differences in the temperature threshold required to induce sterility (Nakagawa et al 2002). High temperatures around flowering have been shown to decrease flower number and seed set in peanuts (Prasad et al 2000(Prasad et al , 2001(Prasad et al , 2003Kakani et al 2002).…”

Stability of Rice Pollination in The Field Under Hot And Dry Conditions in The Riverina Region of New South Wales, Australia

“…High temperatures (above 35ºC) at the time of anthesis impede the swelling of pollen grains in the locules (Matsui et al, 2000) that is the driving force for anther dehiscence (Matsui et al, 1999a, b), and this can result in indehiscence of the anther and defective pollen release (Matsui et al, 2000). The resulting poor pollination is the main cause of the floret sterility observed at these temperatures (Satake and Yoshida, 1978;Matsui et al, 2001), especially for heat-susceptible cultivars (Satake and Yoshida, 1978). Matsui et al (2005) showed that the tolerance to heatinduced spikelet sterility of rice cultivars is closely related to the length of dehiscence at the basal part of thecae.…”