Chen Yaqi, Su Kaiqi, Li Chunjie, White James F
State Key Laboratory of Grassland Agro-Ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, Gansu Tech Innovation Center of Western China Grassland Industry, Center for Grassland Microbiome, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China.
State Key Laboratory of Grassland Agro-Ecosystems, National Demonstration Center for Experimental Grassland Science Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China.
Microorganisms. 2021 Oct 20;9(11):2183. doi: 10.3390/microorganisms9112183.
the cool-season grass (drunken horse grass) is an important species in the northwest grasslands of China. This grass engages in a symbiotic relationship with endophytes, which affect host plants by increasing growth, repelling herbivores, and increasing tolerance to stressful environments.
in this work, we evaluated the interaction effects of the endophyte on various dormancy-breaking treatments on A. seeds from six different locations. We used both endophyte-infected plants and noninfected plants and applied four dormancy-breaking methods to test germination.
our results showed that the germination rate of endophytic seeds from the Xiahe site (with highest altitude) was significantly higher than that from other sites when water soaking was applied ( < 0.05). Endophytic seeds had a greater germination rate, and soluble sugar, indole acetic acid (IAA), and gibberellin (GA) contents, under any condition. There was a significant interaction among the method, endophyte status, and origin regarding germination ( < 0.001); particularly, the effects of warm water soaking and endophyte infection on the germination of seeds from the Xiahe site was significant ( < 0.05).
the infection of endophyte is able to increase the content of soluble sugar, IAA, and GA, and stimulate the seed germination of A. .
冷季型草（醉马草）是中国西北草原的重要物种。这种草与内生菌存在共生关系，内生菌通过促进生长、驱避食草动物和增强对逆境环境的耐受性来影响宿主植物。
在本研究中，我们评估了内生菌对来自六个不同地点的A.种子的各种打破休眠处理的相互作用效果。我们使用了内生菌感染的植物和未感染的植物，并应用四种打破休眠的方法来测试发芽情况。
我们的结果表明，当采用水浸处理时，来自海拔最高的夏河地点的内生菌种子的发芽率显著高于其他地点（<0.05）。在任何条件下，内生菌种子都具有更高的发芽率以及可溶性糖、吲哚乙酸（IAA）和赤霉素（GA）含量。在发芽方面，处理方法、内生菌状态和种子来源之间存在显著的相互作用（<0.001）；特别是，温水浸泡和内生菌感染对夏河地点种子发芽的影响显著（<0.05）。
内生菌的感染能够增加可溶性糖、IAA和GA的含量，并促进A.种子的发芽。
