RESPONSES OF THREE VESICULAR - ARBUSCULAR MYCORRHIZAL FUNGI AT FOUR SOIL TEMPERATURES AND THEIR EFFECTS ON COTTON GROWTH.

摘要: SUMMARY The effects of four soil temperatures on growth Stoneville 213 cotton (Gossypium hirsutum L.) and root colonization by three vesicular–arbuscular mycorrhizal fungi were tested in temperature tanks the glasshouse. Growth responses fresh dry weights shoots plant height linear for noninoculated plants, but nonlinear plants with Glomus intraradices Schenck & Smith, ambisporum Smith Schenck, or Gigaspora margarita Becker Hall at 18, 24, 30 36 °C. Total length positively correlated increased as increased. However, total was not significantly changed nonmycorrhizal plants. At 18 °C, shoot improved mycorrhizas actually suppressed endophytes. 30, stimulated growth. Shoot maximum °C G. intraradicvs inoculated ambisporutn. Percent endophytes less than 10% ranged from 57 to 80% 24 higher. All had leaf tissue concentrations P, Cu, Zn, Mn greatest ambisporum. The generally equally well slightly more effective a symbiont either margarita.