Article
Microbiology
Yongkang Deng, Yuan Gao, Chenxi Li, Junzhen Zhang, Xiaowen Fan, Nianxi Zhao, Yubao Gao, Anzhi Ren
Summary: The study analyzed the metabolites of Achnatherum sibiricum infected with two species of fungal endophytes, Epichloe gansuensis (Eg) and Epichloe sibirica (Es), using GC-MS analysis. The results showed that the metabolic profiles of Eg and Es were generally similar, with only six differential metabolites detected. The infection of Epichloe indirectly led to an increase in soluble sugars and metabolites related to defense mechanisms in A. sibiricum. Furthermore, there was a significant positive correlation in the metabolite contents between the endophyte and the host.
Article
Plant Sciences
Xinjian Shi, Tianzi Qin, Yaobing Qu, Junzhen Zhang, Guang Hao, Nianxi Zhao, Yubao Gao, Anzhi Ren
Summary: Epichloe endophytes can enhance host grasses' resistance to pathogenic fungi by increasing photosynthesis, scavenging reactive oxygen species, and regulating gene expression related to disease resistance. Endophyte infection also induces the accumulation of jasmonic acid, ethylene, and pipecolic acid, strengthening the host's defense response to pathogens.
Article
Microbiology
Rui Zhong, Daniel A. Bastias, Xingxu Zhang, Chunjie Li, Zhibiao Nan
Summary: This study demonstrated the positive effects of Epichloe endophyte on the growth and drought tolerance of Achnatherum inebrians by promoting photosynthetic rate and biomass accumulation.
Article
Agronomy
Xuelian Cui, Xingxu Zhang, Lielie Shi, Michael John Christensen, Zhibiao Nan, Chao Xia
Summary: This study explored the effects of an Epichloe endophyte on growth and physiology parameters of drunken horse grass under different soil water contents, and examined the possible transgenerational effects on these indicators. The endophyte increased aboveground biomass and chlorophyll content, as well as photosynthetic parameters. It also promoted abscisic acid and indolE-3-acetic acid content but decreased cytokinin content. The nitrogen and phosphorus content of Epichloe-infected plants was higher, but the endophyte decreased C:N and C:P ratios under drought conditions. Transgenerational effects were present, indicating that plants from seeds in dry sites are more competitive under water deficiency conditions.
Article
Microbiology
Xuelian Cui, Wen He, Michael John. Christensen, Jinfeng Yue, Fanbin Zeng, Xingxu Zhang, Zhibiao Nan, Chao Xia
Summary: The study found that ABA can enhance plant drought tolerance by promoting plant growth, stomatal conductance, and photosynthetic rate, while Epichloe endophytes may enhance plant drought tolerance by modulating the action of ABA.
Article
Agronomy
Junzhen Zhang, Xinhe Yu, Yaobing Qu, Xinjian Shi, Luoyang He, Xianqin Wei, Lei Chen, Nianxi Zhao, Anzhi Ren
Summary: This study investigates the effects of nitrogen deposition and pathogen infection on the competitive ability of endophyte-infected (EI) and endophyte-free (EF) plants. The results show that EI plants have a stronger competitive advantage than EF plants under low nitrogen conditions, but this advantage decreases with increasing nitrogen supply. However, when high nitrogen and pathogens are present, pathogen inoculation can reverse the adverse effects of high nitrogen on the competitive advantage of EI plants. Additionally, endophytic fungi not only reduce disease in EI plants but also in neighboring EF plants. The presence of endophytic fungi also alters the host plant's response to nitrogen, with EF plants showing increased disease with increasing leaf nitrogen content while EI plants do not change.
Article
Multidisciplinary Sciences
Bowen Liu, Yawen Ju, Chao Xia, Rui Zhong, Michael J. Christensen, Xingxu Zhang, Zhibiao Nan
Summary: This study examined the impact of Epichloe fungal endophyte on microbial communities and leaf metabolites in Achnatherum inebrians. The presence of Epichloe increased the diversity of bacteria and fungi, and influenced the location of colonization within and on the leaves.
Article
Plant Sciences
Yaobing Qu, Tianzi Qin, Xinjian Shi, Jing Chen, Hui Liu, Nianxi Zhao, Yubao Gao, Anzhi Ren
Summary: This study investigates the role of soil microbes in the growth and competitive ability of grasses infected with aboveground endophytic fungi. The results show that soil microbial inoculation is detrimental to the growth of the grass, but the presence of the endophytic fungi mitigates this inhibitory effect. When the grass is planted with another species, there is a significant interaction between the endophytic fungi and soil microbes on interspecific competition. The improvement of competitive ability by the endophytic fungi depends on the diversity of soil microbes.
JOURNAL OF PLANT ECOLOGY
(2023)
Article
Plant Sciences
Yaobing Qu, Tianzi Qin, Junzhen Zhang, Yongkang Deng, Xinhe Yu, Xianqin Wei, Nianxi Zhao, Yubao Gao, Anzhi Ren
Summary: This experiment investigated the effects of endophytes on the diversity effects of the host plant community biomass. The results showed that endophyte infection significantly increased belowground biomass and the abundance of Cleistogenes squarrosa, as well as the community diversity of the 4-species mixtures. Endophyte infection may contribute to the positive relationship between species diversity and productivity.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Biotechnology & Applied Microbiology
Xinjian Shi, Tianzi Qin, Yaobing Qu, Junzhen Zhang, Guang Hao, Yangyang Zhao, Zhichao Zhang, Nianxi Zhao, Anzhi Ren
Summary: Epichloe endophytes improve the resistance of host grasses to pathogenic fungi by activating plant hormone signaling pathways and promoting the accumulation of antimicrobial substances.
BIOLOGICAL CONTROL
(2022)
Article
Microbiology
Manuella Nobrega Dourado, Paulo Marques Pierry, Oseias Rodrigues Feitosa-Junior, Guillermo Uceda-Campos, Deibs Barbosa, Paulo A. Zaini, Abhaya M. Dandekar, Aline Maria da Silva, Welington Luiz Araujo
Summary: This study analyzed the physiological and molecular aspects of M. mesophilicum SR1.6/6 and X. fastidiosa 9a5c in co-culture. The results showed that M. mesophilicum inhibits the growth of X. fastidiosa by nutrient competition and enzymatic degradation of its cell wall.
Article
Agronomy
Meiling Song, Yuqin Wang, Hongsheng Wang, Gensheng Bao, Xiuzhang Li
Summary: Endophytes have an impact on litter decomposition of host plants, and different grass-endophyte symbioses exhibit different decomposition rates. Our study results will enhance the understanding of the role of endophytes in ecological processes of grasslands.
Article
Agronomy
Wenpeng Hou, Jianfeng Wang, Michael J. Christensen, Jie Liu, Yongqiang Zhang, Yinglong Liu, Chen Cheng
Summary: The study showed that E. gansuensis enhances the tolerance of A. inebrians to low N stress by increasing the content of certain organic acids, fatty acids, sugars, and amino acids in leaves and roots, representing a reprogramming of amino acid metabolic pathways to adapt to different nitrogen concentrations.
Article
Microbiology
Yue Zhu, Shibo Zhu, Fang Zhang, Zhenrui Zhao, Michael J. J. Christensen, Zhibiao Nan, Xingxu Zhang
Summary: This study investigated the effects of the presence of Epichloe endophyte on photosynthesis in Achnatherum inebrians under pathogen infection. The results showed that the presence of Epichloe endophyte increased the photosynthetic rate and up-regulated genes involved in photosynthesis.
Correction
Agronomy
Rui Zhong, Chao Xia, Yawen Ju, Xingxu Zhang, Tingyu Duan, Zhibiao Nan, Chunjie Li
Summary: There are errors in the spelling of some Latin names in this paper.