Microscopic Aspects of Silicon-Mediated Rice Resistance to Leaf Scald

Silicon-Mediated Resistance in a Susceptible Rice Variety to the Rice Leaf Folder, Cnaphalocrocis medinalis Guenée (Lepidoptera: Pyralidae)

The rice leaf folder, Cnaphalocrocis medinalis (Guenée), is one of the most destructive rice pests in Asian countries. Rice varieties resistant to the rice leaf folder are generally characterized by high silicon content. In this study, silicon amendment, at 0.16 and 0.32 g Si/kg soil, enhanced resistance of a susceptible rice variety to the rice leaf folder. Silicon addition to rice plants at b...

Epidemiology of Leaf Scald in the Moreton District of Queensland

The incidence and geographic distribution of leaf scald (Xanthomonas albilineans (Ashby) Dowson) in the Moreton district between 1951 and 1975 is described. Most of the infection has been in 471. Increase in incidence of the disease appears to be favoured by periods of high rainfall followed by dry weather. A survey was made, at monthly intervals from January to June 1975, to try to determine l...

The role of silicon in enhancing resistance to bacterial blight of hydroponic- and soil-cultured rice

Here we report for the first time that bacterial blight of rice can be alleviated by silicon (Si) added. In both inoculated and uninoculated plants, shoot dry weight was significantly higher in the +Si plants than in the -Si plants. A soil-cultured trial showed that disease severity was 24.3% lower in the Si-amended plants than in the non-Si-amended plants. Plants that were switched from -Si to...

Molecular mechanism of Pb1-mediated panicle blast resistance in rice

Background In Japan, an average of 22 billion yen is spent annually for agrochemicals in order to control rice damage caused by the blast disease. Thus, blast resistance is one of the most important targets of rice breeding. Several blast resistance genes have been identified so far. However, many of them are effective against particular races of blast fungi only and the resistance against the ...

Macro and Microscopic Aspects