Effects of Endophytic Fungi on Growth and Development of Host Hordeum bogdanii under Different Temperatures
In order to investigate the effects of endophytic fungi on growth and physiological characteris-tics of Hordeum bogdanii under different temperatures,this experiment was carried out focusing on H.bogdanii from Wensu County,Xinjiang.The changes of plant height,tiller number,malondialdehyde(MDA)content,proline content,and activities of catalase(CAT)and peroxidase(POD)in H.bogdanii plants with endophyt-ic fungi(E+)and without endophytic fungi(E-)were studied after 3,7 and 14 days of 10,15 ℃ and 20 ℃ treatments.The results showed that the plant height and tiller number of E+plants were significantly higher than those of E-plants at 10℃ and 15 ℃.After 3 and 7 days of different treatments,the POD activity of E+plants continuously increased with temperature decreasing and was significantly higher than that of E-plants at 10 ℃.The CAT activity of E+plants was higher than that of E-plants under the three temperature treat-ments,and reached significant level at 15 ℃.Under 10 ℃ and 15 ℃ treatments,the MDA content of E+plants was lower than that of E-plants,while the proline content was higher than that of E-plants,which reached significant level at 15℃ and 10℃,respectively.In summary,the endophytic fungi of H.bogdanii could enhance the adaptability of host to different temperature environment by increasing the activities of antioxi-dant enzymes,promoting the accumulation of osmotic adjustment substances and reducing membrane damage.
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