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Updated: Aug 17, 2026

Repeatable Stair-step Assay to Access the Allelopathic Potential of Weedy Rice (Oryza sativa ssp.)
Published on: January 28, 2020
[Stress-resistance of weedy rice Luolijing (Oryza sativa)]
Liuqing Yu1, A Martin Mortimer, Songnan Xuan
1State Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China. liuqyu53@yahoo.com.cn
Abstract:
Weedy rice Luolijing (Oryza sativa) is generated in Dandong, Liaoning Province of Northeast China. Its plant height is taller than normal planted rice varieties, and its caryopsis is medium or long in size, which dropped easily after matured. The color of the caryopsis shell is straw-like or yellow alternated with black-gray. The spikelet is with or without awns, and the length of the awns is 2-12 cm. The 1000 caryopsis weight is 23.5 g, and the hull is nacarat. The seed germination rate at 13-38 degrees C is > 88%. Under 2.5-10 cm water flooding, the plant dry weight reduced 50%-69%. At seedling stage, Luolijing had a stronger resistance capability against barnyardgrass (Echinochloa crusgalli var. mitis) than an alellopathic rice I-kung-pao, which meant that Luolijing had no allelopathic function. The Luolijing had a tolerance to 0.5% saline-alkaline solution.
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