Greater chemical signaling in root exudates enhances soil mutualistic associations in invasive plants compared to natives

Yu, Hu; He, Yingying; Zhang, Wen; Chen, Li; Zhang, Junli; Zhang, Xuebin; Dawson, Wayne; Ding, Jianqing

doi:10.1111/nph.18289

Cited by 39 publications

(53 citation statements)

References 74 publications

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“…Generally, the allelopathic substances can directly affect the functions of specific microbe to alter soil nutrients. For example, the quercetin and strigolactones, two chemical signals in the root of exotic species, can stimulate the growth and root colonization of AMF to enhance its ability to absorb soil nutrients ( Yu et al., 2022 ). But it is also possible that root exudates and allelopathic substances alter soil nutrients and then affect the functions of microbes.…”

Section: Discussionmentioning

confidence: 99%

The effects of allelochemicals from root exudates of Flaveria bidentis on two Bacillus species

Sun

Han

et al. 2022

Front. Plant Sci.

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To determine the allelopathic effects of root exudates from Flaveria bidentis on function of Bacillus, pot experiment was used to collect root exudates from living plants and test its allelopathic effects on function of Bacillus frigoritolerans and Bacillus megaterium, which were two dominant bacteria in the rhizosphere soil of F. bidentis. To obtain the allelopathic substances, the root exudates were successively extracted by N-hexane, dichloromethane, ethyl acetate, and N-butanol, and their allelopathic effects were tested. The results showed that B. frigoritolerans and B. megaterium considerably increased the concentration of available phosphorus and nitrogen, respectively, when the soil was treated with different concentrations of root exudates. Among the four organic solvent extracts, dichloromethane extracts significantly increased the abundances of B. frigoritolerans and B. megaterium and promoted their nitrogen-fixing and phosphate-solubilizing abilities. Phenol was detected in dichloromethane extracts by gas chromatograph-mass spectrometer (GC-MS). Meanwhile, phenol promoted the ability to fix nitrogen of B. megaterium and its growth by increasing the soil available nitrogen concentration, but phenol promoted the ability to solubilize phosphate of B. frigoritolerans only in 0.1mg/mL concentration. Therefore, phenol was an allelochemicals in the root exudates of F. bidentis that affects the growth and activities of B. megaterium.

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Section: Discussionmentioning

confidence: 99%

The effects of allelochemicals from root exudates of Flaveria bidentis on two Bacillus species

Sun

Han

et al. 2022

Front. Plant Sci.

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“…I find that I discover new papers mostly when I review manuscripts. One I reviewed recently for New Phytologist that I really liked was Yu et al (2022Yu et al ( , pp. 1140Yu et al ( -1153, published in this issue of New Phytologist.…”

Section: Why Did You Decide To Pursue a Career In Research?mentioning

confidence: 99%

“…One I reviewed recently for New Phytologist that I really liked was Yu et al . (2022, pp. 1140–1153), published in this issue of New Phytologist .…”

Section: What Are Your Favourite New Phytologist Papers Of Recent Yea...mentioning

confidence: 99%

Ylva Lekberg

2022

New Phytologist

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“…In this issue of New Phytologist , Yu et al . (2022, pp. 1140–1153) ‘Greater chemical signaling in root exudates enhances soil mutualistic associations in invasive plants compared to natives’ show that interactions with arbuscular mycorrhizal (AM) fungi are more beneficial for exotic invasive species than related native species.…”

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confidence: 99%

New support for the Enhanced Mutualism Hypothesis for invasion

Lekberg

Callaway

2022

New Phytologist

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Why are so many exotic plant species more abundant and have greater impacts in their nonnative than native ranges? Hypotheses that address this vexing question generally focus on variation in the intensity of negative interactions, such as escaping consumers or outcompeting natives in nonnative ranges (Jeschke, 2014). But in addition to these, some invasive species have shown a remarkable ability to capitalize on generalist mutualists in their nonnative ranges (Traveset & Richardson, 2014), and in some cases procure more or better mutualists than in their native ranges. This latter phenomenon was formalized as the Enhanced Mutualism Hypothesis (EMH; Reinhart & Callaway, 2004, 2006. In this issue of New Phytologist, Yu et al. (2022, pp. 1140-1153) 'Greater chemical signaling in root exudates enhances soil mutualistic associations in invasive plants compared to natives' show that interactions with arbuscular mycorrhizal (AM) fungi are more beneficial for exotic invasive species than related native species. This provides some of the most convincing support of the EMH to date. With an elegant set of experiments, Yu et al. show that: (1) exotic plant species invest more in producing and sending chemical signals to AM fungi than do native plants; (2) signals produced by nonnative plants are more effective at recruiting AM fungi to exotic plant roots than signals produced by native species, and most importantly; (3) recruiting more AM fungi corresponds with greater plant growth. Exotic invasive plant species out-perform natives in many ways (Inderjit et al., 2021), but if and how mutualism is involved in this superior performance remains an ecological frontier.

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Greater chemical signaling in root exudates enhances soil mutualistic associations in invasive plants compared to natives

Cited by 39 publications

References 74 publications

The effects of allelochemicals from root exudates of Flaveria bidentis on two Bacillus species

The effects of allelochemicals from root exudates of Flaveria bidentis on two Bacillus species

Ylva Lekberg

New support for the Enhanced Mutualism Hypothesis for invasion

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