Os04g0201900

The rice Os04g0201900 was reported as OslecRK in 2013 by researchers from China.

Annotated Information

Figure 2. Silencing of OslecRK in rice leads to depression of the germination rate..

Gene Symbol

• Os04g0201900 <=> OslecRK,lecRK

Function

• The rice OslecRK gene encodes rice lectin receptor-like kinase, which can contribute to both seed germination and plant innate immunity.
• OslecRK is a component of the innate immune system in plants
• Knocking down the OslecRK gene depresses the expression of a–amylase genes, reducing seed viability and thereby decreasing the rate of seed germination. Moreover, it also inhibits the expression of defense genes, and so reduces the resistance of rice plants to fungal and bacterial pathogens as well as herbivorous insects.
• The dual effects of OslecRK may be indicative of progressive adaptive evolution in rice.

Phenotypic analysis

• To study the function of OslecRK in plants, RNA interference (RNAi) knockdown experiments were performed in rice.
• The seeds of the RNAi lines had low germination rates in 3-day germination tests, ranging from 23.3 to 43.3%. This is appreciably lower than the rate of 83.3% observed for wild-type (WT) seeds (Figure 2a). However, there were no statistically significant phenotypic differences between the RNAi line and the WT during the later vegetative and reproductive periods.
• The germination rate of the homozygotic RNAi strain Ri2–10 (Ri) (Figure 2b) was monitored over three successive generations, confirming that its low rate of germination was due to the suppression of OslecRK expression (Figure 2c).
• This clearly demonstrates that OslecRK influences the rate of seed germination.

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Labs working on this gene

• State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan 430072, China