Effects of Achnatherum inebrians infected with Neotyphodium endophyte on accompanying species of Stipa capillata and Poa sphondylodes

Abstract

Abstract: Drunken horse grass (Achnatherum inebrians), an intoxicating grass in native grasslands of Northwest China, often grows in conjunction with Stipa capillata and Poa sphondylodes. Competitive interactions between endophyte infected (E+) A. inebrians and endophyte free (E-) A. inebrians with S. capillata and P. sphondylodes were investigated. E+ A. inebrians had a significant inhibition effect on percentage seed germination and seedling growth (P<0.05), which declined significantly by 17.1%, 13.6%, respectively. Similarly, seedling length declined 23.2% and by 16.3%; E+ plants had significant inhibition effects on tiller heights of S. capillata and P. sphondylodes from the first week after germination (P<0.05) and on tiller numbers and total biomass (P<0.05). E- A. inebrians had no significant effects on seed germination, seedling growth, tiller height, tiller number or total biomass (P>0.05). S. capillata and P. sphondylodes had no significant effects on A. inebrians. In summary, E+ A. inebrians showed significant antagonism to S. capillata and P. sphondylodes, but E- A. inebrians had no significant effects on the other two grasses.

CLC Number:

Q948.1

HUANG Xi, LI Chun-jie, NAN Zhi-biao, YANG Song, CHAI Qing. Effects of Achnatherum inebrians infected with Neotyphodium endophyte on accompanying species of Stipa capillata and Poa sphondylodes[J]. Acta Prataculturae Sinica, 2010, 19(5): 87-93.

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