Benefits of a fungal endophyte in Leymus chinensis depend more on water than on nutrient availability
Benefits of a fungal endophyte in Leymus chinensis depend more on water than on nutrient availability
复制标题
羊草内生真菌的益处更多地取决于水而不是养分可用性
DOI：
10.1016/j.envexpbot.2013.11.019
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发表时间：
2014-12
影响因子：
5.7
通讯作者：
Yubao Gao
中科院分区：
文献类型：
--
作者：
Lianjie Wu;Yong Zhou;Xia Li;Yubao Gao
Symbiotic relationships with microbes may influence how plants respond to environmental change. In this study, we tested the hypothesis that symbiosis with the endophyte promoted drought tolerance of the native grass and hypothesized the drought tolerance was affected by nutrient availability. In the greenhouse experiment we compared the performance of endophyte-infected (EI) and endophyte-free (EF)Leymus chinensis, a dominant species native to the Inner Mongolia steppe, under altered water and nutrient availability. The results showed that the benefits of the endophyte to the host depended on water availability. Under well-watered conditions, total biomass was not affected by endophyte infection. Under drought stress conditions, however, EI had significantly more total biomass than EF plants. In contrast to expectations, the beneficial effect of endophyte infection was less dependent on fertilizer supply. In the well-watered treatment, there were no significant differences in total biomass between EI and EF plants regardless of fertilizer levels, and their differences occurred only in biomass allocation. Under drought conditions, EI produced significantly more biomass than EF plants regardless of fertilizer levels. Endophyte infection tended to reduce leaf nitrogen (N) concentration of host leaves but made the host allocate significantly higher fractions of N to photosynthetic machinery, and thus EI plants had higher photosynthetic N use efficiency and shoot biomass than did EF plants when fertilizer was limited. Our results support the idea that the endophyte–grass interactions are dependent on available resources – but in this case they depended more on water than on nutrient availability.
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影响因子：
2.7
作者：
Poorter, H;Evans, JR
通讯作者：
Evans, JR
DOI：
10.1201/9781351070324-8
发表时间：
1994
期刊：
--
影响因子：
--
作者：
J. Porter
通讯作者：
J. Porter
影响因子：
4.4
作者：
Yong Y. Tan;M. J. Spiering;Vicki Scott;G. Lane;M. Christensen;J. Schmid
通讯作者：
Yong Y. Tan;M. J. Spiering;Vicki Scott;G. Lane;M. Christensen;J. Schmid
DOI：
10.1111/j.1469-8137.2012.04140.x
发表时间：
2012-07
期刊：
The New phytologist
影响因子：
--
作者：
S. Saari;S. Faeth
通讯作者：
S. Saari;S. Faeth
DOI：
10.1080/00288233.2004.9513603
发表时间：
2004-09-01
影响因子：
1.8
作者：
Crush, JR;Popay, AJ;Waller, J
通讯作者：
Waller, J