Abstract:
To explore the effects of boring by Lixus ochraceus on the seed germination characteristics of the short-lived plant Malcolmia scorpioides. Seed produced from the rhizomes of bored group and unbored group was used to study the characteristics of seed germination under different temperature and drought stress. The results showed that different temperatures had no significant effect on the seed germination rate of Malcolmia scorpioides. after the boring, but high temperature and low temperature conditions inhibited the seed germination rate of Malcolmia scorpioides. The temperature threshold of seed germination of Malcolmia scorpioides was reduced after boring by L. ochraceus. But at the same time, the suboptimal temperature range of the seeds was widened, and the seed germination rate was accelerated. Drought stress delayed seed germination of Malcolmia scorpioides, while being bored by L. ochraceus enhanced the drought resistance of seeds of Malcolmia scorpioides, showing higher germination rate.