Root placement patterns in allelopathic plant–plant interactions

Wang, Chao-Yong; Li, Leilei; Meiners, Scott J.; Kong, Chui‐Hua

doi:10.1111/nph.18552

Cited by 26 publications

(21 citation statements)

References 66 publications

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“…Common examples of allelopathic disturbances are that allelopathic and invasive plants release chemicals to inhibit the growth of weeds and native plants [ 21 , 24 , 25 , 26 ]. Meanwhile, a recent study also demonstrated that allelochemicals mediated root placement patterns in interspecific interactions [ 27 ]. For facilitation, the nitrogen fixation and phosphorus mobilization of legumes modifies the root morphogenesis of other plants, thereby achieving interspecific facilitation in traditional intercropping systems [ 28 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Response of Cucumis sativus to Neighbors in a Species-Specific Manner

Zhang

Yan

2022

Plants

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Plants exhibit various behaviors of growth and allocation that play an important role in plant performance and social interaction as they grow together. However, it is unclear how Cucumis sativus plants respond to different neighbors. Here, we performed 5 neighbor combinations with C. sativus as the focal species. The selected materials of C. sativus responded to neighbors and exhibited different behavior strategies in a species-specific manner. All competition treatments reduced the growth of C. sativus seedlings to a certain extent, but only the Eruca sativa neighbor treatment reached a significant level in total root length and shoot biomass. Compared with growing under solitary conditions, focal plants avoided, tended to and did not change their allocation to their nearby plants. The larger the biomass of their neighbors, the stronger the inhibition of the focal plants. In addition, no significant correlations between growth and allocation variables were found, suggesting that growth and allocation are two important aspects of C. sativus behavioral strategies. Our findings provide reference and support for agricultural production of C. sativus, but further research and practice are still needed.

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Section: Introductionmentioning

confidence: 99%

Response of Cucumis sativus to Neighbors in a Species-Specific Manner

Zhang

Yan

2022

Plants

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“…Plants can adjust biomass allocation and root traits as well as root placement patterns in response to different neighbors associated with various soil types 5,36,42 . In the current study, rice had different responses to penoxsulam‐resistant and ‐susceptible barnyardgrass.…”

Section: Discussionmentioning

confidence: 64%

Penoxsulam‐resistant barnyardgrass‐mediated rhizosphere microbial communities affect the growth of rice

Zhao

Kong

2023

Pest Management Science

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BACKGROUND The incidence of herbicide‐resistant barnyardgrass is escalating in paddy fields, yet the interactions between resistant weeds and rice are largely unknown. The microbiota of herbicide‐resistant barnyardgrass rhizosphere soil is critical for both barnyardgrass and rice fitness. RESULTS Rice has different biomass allocation and root traits in the presence of penoxsulam‐resistant versus penoxsulam‐susceptible barnyardgrass or in their conditioned soil. Compared to susceptible barnyardgrass, resistant barnyardgrass led to an allelopathic increase in rice root, shoot, and whole‐plant biomasses. Resistant barnyardgrass recruited distinct core and unique microbes in rhizosphere soil compared to susceptible barnyardgrass. In particular, resistant barnyardgrass assembled more Proteobacteria and Ascomycota to enhance plant stress tolerance. Furthermore, the root exudates from resistant and susceptible barnyardgrass were responsible for the assembly and establishment of the root microbial structure. Importantly, (−)‐loliolide and jasmonic acid in root exudates were correlated with the core microbes in the rhizosphere soil. CONCLUSION The interference of barnyardgrass with rice can be mediated by rhizosphere microbial communities. Biotype‐specific variation in the ability to generate soil microbial communities appears to ameliorate the negative consequences for rice growth, providing an intriguing possibility for modulation of the rhizosphere microbiota to increase crop productivity and sustainability. © 2023 Society of Chemical Industry.

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“…Effective strategies involve plant–plant chemical signaling through the release of compounds that trigger defensive responses in neighboring plants (Wilkinson et al ., 2019; Zhang et al ., 2020; Karban, 2021). Recent studies have shown that neighbor‐induced allelochemical response can be driven by the root‐secreted signal (−)‐loliolide (Kong et al ., 2018; Li et al ., 2020; Wang et al ., 2023). In this study, (−)‐loliolide upregulated the expression of defensive metabolite biosynthesis genes and activated defense‐related signaling pathways, inducing the production of defensive metabolites against herbivores, pathogens, and competitors in several plant species.…”

Section: Discussionmentioning

confidence: 99%

“…Recent studies have shown that the root‐secreted carotenoid metabolite, (−)‐loliolide, functions as a general soilborne signal for neighbor detection that induced an allelochemical response in wheat and rice exposed to many competing species (Kong et al ., 2018; Li et al ., 2020; Wang et al ., 2023). (−)‐Loliolide also acted as an endogenous inducer of herbivore resistance in tomato and Arabidopsis aboveground (Murata et al ., 2019).…”

Section: Introductionmentioning

confidence: 99%

(−)‐Loliolide is a general signal of plant stress that activates jasmonate‐related responses

Lou

et al. 2022

New Phytologist

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Summary The production of defensive metabolites in plants can be induced by signaling chemicals released by neighboring plants. Induction is mainly known from volatile aboveground signals, with belowground signals and their underlying mechanisms largely unknown. We demonstrate that (−)‐loliolide triggers defensive metabolite responses to competitors, herbivores, and pathogens in seven plant species. We further explore the transcriptional responses of defensive pathways to verify the signaling role of (−)‐loliolide in wheat and rice models with well‐known defensive metabolites and gene systems. In response to biotic and abiotic stressors, (−)‐loliolide is produced and secreted by roots. This, in turn, induces the production of defensive compounds including phenolic acids, flavonoids, terpenoids, alkaloids, benzoxazinoids, and cyanogenic glycosides, regardless of plant species. (−)‐Loliolide also triggers the expression of defense‐related genes, accompanied by an increase in the concentration of jasmonic acid and hydrogen peroxide (H2O2). Transcriptome profiling and inhibitor incubation indicate that (−)‐loliolide‐induced defense responses are regulated through pathways mediated by jasmonic acid, H2O2, and Ca 2+. These findings argue that (−)‐loliolide functions as a common belowground signal mediating chemical defense in plants. Such perception‐dependent plant chemical defenses will yield critical insights into belowground signaling interactions.

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Root placement patterns in allelopathic plant–plant interactions

Cited by 26 publications

References 66 publications

Response of Cucumis sativus to Neighbors in a Species-Specific Manner

Response of Cucumis sativus to Neighbors in a Species-Specific Manner

Penoxsulam‐resistant barnyardgrass‐mediated rhizosphere microbial communities affect the growth of rice

(−)‐Loliolide is a general signal of plant stress that activates jasmonate‐related responses

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