An Endophyte of Achnatherum inebrians, an Intoxicating Grass of Northwest China

Bruehl, G. W.; Kaiser, W. J.; Klein, R.

doi:10.2307/3760590

Cited by 26 publications

(15 citation statements)

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“…Except for A. sibiricum , only two species, A. inebrians (Hance) Keng ex Tzvelev and A. robustum (Vasey) Barkworth, are reported to be infected by Neotyphodium endophytes. Both are notorious for their narcotic effects on livestock, and hence are known as ‘drunken horse grass’ and ‘sleepy grass’, respectively [36]–[37]. In contrast to A. inebrians and A. robustum , A. sibiricum has no obvious herbivore deterrence according to local records and our own observations.…”

Section: Introductionmentioning

confidence: 74%

Endophyte-Mediated Effects on the Growth and Physiology of Achnatherum sibiricum Are Conditional on Both N and P Availability

Xia¹,

Ren

Han³

et al. 2012

PLoS ONE

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The interaction of endophyte–grass associations are conditional on nitrogen (N) availability, but the reported responses of these associations to N are inconsistent. We hypothesized that this inconsistency is caused, at least in part, by phosphorus (P) availability. In this experiment, we compared the performance of endophyte-infected (EI) and endophyte-free (EF) Achnatherum sibiricum subjected to four treatments comprising a factorial combination of two levels of N (N+ vs. N−, i.e. N supply vs. N deficiency) and two levels of P (P+ vs. P−, i.e. P supply vs. P deficiency) availability. The results showed that A. sibiricum–Neotyphodium associations were conditional on both N and P availability, but more conditional on N than P. Under N+P− conditions, endophyte infection significantly improved acid phosphatase activity of EI plants, such that the biomass of EI plants was not affected by P deficiency (i.e. similar growth to N+P+ conditions), and resulted in more biomass in EI than EF plants. Under N−P+ conditions, biomass of both EI and EF decreased compared with N+P+; however, EI biomass decreased slowly by decreasing leaf N concentration more rapidly but allocating higher fractions of N to photosynthetic machinery compared with EF plants. This change of N allocation not only improved photosynthetic ability of EI plants but also significantly increased their biomass. Under N−P− conditions, EI plants allocated higher fractions of N to photosynthesis and had greater P concentrations in roots, but there was no significant difference in biomass between EI and EF plants. Our results support the hypothesis that endophyte–grass interactions are dependent on both N and P availability. However, we did not find a clear cost of endophyte infection in A. sibiricum.

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Section: Introductionmentioning

confidence: 74%

Endophyte-Mediated Effects on the Growth and Physiology of Achnatherum sibiricum Are Conditional on Both N and P Availability

Xia¹,

Ren

Han³

et al. 2012

PLoS ONE

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“…To date, only two species, Achnatherum inebrians (Hance) Keng ex Tzvelev and Achnatherum robustum (Vasey) Barkworth, are reported to be infected by Neotyphodium endophytes. Both are notorious for the narcotic effects on livestock, and hence, known as "drunken horse grasses" and "sleepy grass", respectively (Petroski et al 1992;Bruehl et al 1994). In contrast to A. inebrians and A. robustum, A. sibiricum has no obvious herbivore deterrence according to local records and our own observations.…”

Section: Introductionmentioning

confidence: 94%

Benefits of a symbiotic association with endophytic fungi are subject to water and nutrient availability in Achnatherum sibiricum

et al. 2011

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Symbiotic relationships with microbes may influence how plants respond to environmental change. Here, we investigated how fungal endophyte infection affected the growth of a native grass under altered water and nutrient availability. In a two-month field experiment, we compared the performance of endophyte-infected (EI) and endophyte-free (EF) Achnatherum sibiricum subjected to four treatments comprised of a factorial combination of two levels of water availability and two levels of fertilization. The greatest benefits of endophyte infection occurred in the well-watered fertilized treatment. With reduced water and/or nutrient availability, the benefits declined. EI plants subjected to drought and fertilization had higher root:shoot ratios and allocated more nitrogen to photosynthetic machinery and thus had a higher net photosynthetic rate than EF counterparts. In the wellwatered unfertilized treatment, EF plants allocated more nutrients to photosynthetic machinery, while EI plants allocated more resources to defense. Thus EI plants were superior to EF plants in terms of nutrient conservation. In the drought unfertilized treatment, no significant difference occurred between EI and EF plants. Our results support the idea that the endophytegrass interactions are dependent on available resources. However, we did not find a clear cost of endophyte infection. For A. sibiricum, fertilizer addition resulted in greater benefits of the symbiosis for plant growth, but this advantage decreased under drought.

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“…Recent evidence has suggested that systemic endophytes can be notable modulators of alpine grassland ecosystems in the Qinghai-Tibet Plateau (Bruehl et al, 1994;Kang et al, 2009;Zhang et al, 2012). Plant growth in the area is limited by two main factors related to the climate: low temperatures and short growing season (Ren et al, 2010a(Ren et al, ,2010bLi et al, 2013).…”

Section: Introductionmentioning

confidence: 98%

Does endophyte symbiosis resist allelopathic effects of an invasive plant in degraded grassland?

Bao

Saikkonen

Wang³

et al. 2015

Fungal Ecology

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An Endophyte of Achnatherum inebrians, an Intoxicating Grass of Northwest China

Cited by 26 publications

References 0 publications

Endophyte-Mediated Effects on the Growth and Physiology of Achnatherum sibiricum Are Conditional on Both N and P Availability

Endophyte-Mediated Effects on the Growth and Physiology of Achnatherum sibiricum Are Conditional on Both N and P Availability

Benefits of a symbiotic association with endophytic fungi are subject to water and nutrient availability in Achnatherum sibiricum

Does endophyte symbiosis resist allelopathic effects of an invasive plant in degraded grassland?

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