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Yoneyama K, Bennett T. Whispers in the dark: Signals regulating underground plant-plant interactions. CURRENT OPINION IN PLANT BIOLOGY 2024; 77:102456. [PMID: 37741801 DOI: 10.1016/j.pbi.2023.102456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 08/22/2023] [Accepted: 08/28/2023] [Indexed: 09/25/2023]
Abstract
Plants are able to actively detect and respond to the presence in neighboring plants, in order to optimize their physiology to promote survival and reproduction despite the presence of competing organisms. A key but still poorly understood mechanism for neighbor detection is through the perception of root exudates. In this review, we explore recent findings on the role of root exudates in plant-plant interactions, focusing both on general interactions and also the highly specialized example of root parasite-host plant interactions.
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Affiliation(s)
- Kaori Yoneyama
- Research and Development Bureau, Saitama University, Japan.
| | - Tom Bennett
- School of Biology, Faculty of Biological Sciences, University of Leeds, UK
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2
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Leso M, Kokla A, Feng M, Melnyk CW. Pectin modifications promote haustoria development in the parasitic plant Phtheirospermum japonicum. PLANT PHYSIOLOGY 2023; 194:229-242. [PMID: 37311199 PMCID: PMC10762509 DOI: 10.1093/plphys/kiad343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 05/12/2023] [Accepted: 05/13/2023] [Indexed: 06/15/2023]
Abstract
Parasitic plants are globally prevalent pathogens with important ecological functions but also potentially devastating agricultural consequences. Common to all parasites is the formation of the haustorium which requires parasite organ development and tissue invasion into the host. Both processes involve cell wall modifications. Here, we investigated a role for pectins during haustorium development in the facultative parasitic plant Phtheirospermum japonicum. Using transcriptomics data from infected Arabidopsis (Arabidopsis thaliana) and rice (Oryza sativa), we identified genes for multiple P. japonicum pectin methylesterases (PMEs) and their inhibitors (PMEIs) whose expression was upregulated by haustoria formation. Changes in PME and PMEI expression were associated with tissue-specific modifications in pectin methylesterification. While de-methylesterified pectins were present in outer haustorial cells, highly methylesterified pectins were present in inner vascular tissues, including the xylem bridge that connects parasite to host. Specifically blocking xylem bridge formation in the haustoria inhibited several PME and PMEI genes from activating. Similarly, inhibiting PME activity using chemicals or by overexpressing PMEI genes delayed haustoria development. Our results suggest a dynamic and tissue-specific regulation of pectin contributes to haustoria initiation and to the establishment of xylem connections between parasite and host.
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Affiliation(s)
- Martina Leso
- Department of Plant Biology, Linnean Center for Plant Biology, Swedish University of Agricultural Sciences, Almas allé 5, 756 51 Uppsala, Sweden
| | - Anna Kokla
- Department of Plant Biology, Linnean Center for Plant Biology, Swedish University of Agricultural Sciences, Almas allé 5, 756 51 Uppsala, Sweden
| | - Ming Feng
- Department of Plant Biology, Linnean Center for Plant Biology, Swedish University of Agricultural Sciences, Almas allé 5, 756 51 Uppsala, Sweden
| | - Charles W Melnyk
- Department of Plant Biology, Linnean Center for Plant Biology, Swedish University of Agricultural Sciences, Almas allé 5, 756 51 Uppsala, Sweden
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3
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Cui S, Inaba S, Suzaki T, Yoshida S. Developing for nutrient uptake: Induced organogenesis in parasitic plants and root nodule symbiosis. CURRENT OPINION IN PLANT BIOLOGY 2023; 76:102473. [PMID: 37826989 DOI: 10.1016/j.pbi.2023.102473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 07/26/2023] [Accepted: 09/09/2023] [Indexed: 10/14/2023]
Abstract
Plants have evolved diverse strategies to meet their nutritional needs. Parasitic plants employ haustoria, specialized structures that facilitate invasion of host plants and nutrient acquisition. Legumes have adapted to nitrogen-limited conditions by developing nodules that accommodate nitrogen-fixing rhizobia. The formation of both haustoria and nodules is induced by signals originating from the interacting organisms, namely host plants and rhizobial bacteria, respectively. Emerging studies showed that both organogenesis crucially involves plant hormones such as auxin, cytokinins, and ethylene and also integrate nutrient availability, particularly nitrogen. In this review, we discuss recent advances on hormonal and environmental control of haustoria and nodules development with side-by-side comparison. These underscore the remarkable plasticity of plant organogenesis.
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Affiliation(s)
- Songkui Cui
- Department of Economic Plants and Biotechnology, Yunnan Key Laboratory for Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Shoko Inaba
- Nara Institute of Science and Technology, Graduate School of Science and Technology, Ikoma, Nara, Japan
| | - Takuya Suzaki
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan; Tsukuba Plant-Innovation Research Center, University of Tsukuba, Tsukuba, Ibaraki, Japan.
| | - Satoko Yoshida
- Nara Institute of Science and Technology, Graduate School of Science and Technology, Ikoma, Nara, Japan.
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Kirschner GK, Xiao TT, Jamil M, Al-Babili S, Lube V, Blilou I. A roadmap of haustorium morphogenesis in parasitic plants. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:7034-7044. [PMID: 37486862 PMCID: PMC10752351 DOI: 10.1093/jxb/erad284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 07/23/2023] [Indexed: 07/26/2023]
Abstract
Parasitic plants invade their host through their invasive organ, the haustorium. This organ connects to the vasculature of the host roots and hijacks water and nutrients. Although parasitism has evolved independently in plants, haustoria formation follows a similar mechanism throughout different plant species, highlighting the developmental plasticity of plant tissues. Here, we compare three types of haustoria formed by the root and shoot in the plant parasites Striga and Cuscuta. We discuss mechanisms underlying the interactions with their hosts and how different approaches have contributed to major understanding of haustoria formation and host invasion. We also illustrate the role of auxin and cytokinin in controlling this process.
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Affiliation(s)
- Gwendolyn K Kirschner
- BESE Division, Plant Cell and Developmental Biology, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia
| | - Ting Ting Xiao
- BESE Division, Plant Cell and Developmental Biology, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia
| | - Muhammad Jamil
- BESE Division, The BioActives Lab, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia
| | - Salim Al-Babili
- BESE Division, The BioActives Lab, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia
| | - Vinicius Lube
- BESE Division, Plant Cell and Developmental Biology, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia
| | - Ikram Blilou
- BESE Division, Plant Cell and Developmental Biology, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia
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Aguilar-Venegas M, Quintana-Rodríguez E, Aguilar-Hernández V, López-García CM, Conejo-Dávila E, Brito-Argáez L, Loyola-Vargas VM, Vega-Arreguín J, Orona-Tamayo D. Protein Profiling of Psittacanthus calyculatus during Mesquite Infection. PLANTS (BASEL, SWITZERLAND) 2023; 12:464. [PMID: 36771550 PMCID: PMC9920738 DOI: 10.3390/plants12030464] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/13/2023] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
Psittacanthus calyculatus is a hemiparasite mistletoe that represents an ecological problem due to the impacts caused to various tree species of ecological and commercial interest. Although the life cycle for the Psittacanthus genus is well established in the literature, the development stages and molecular mechanism implicated in P. calyculatus host infection are poorly understood. In this study, we used a manageable infestation of P. laevigata with P. calyculatus to clearly trace the infection, which allowed us to describe five phenological infective stages of mistletoe on host tree branches: mature seed (T1), holdfast formation (T2), haustorium activation (T3), haustorium penetration (T4), and haustorium connection (T5) with the host tree. Proteomic analyses revealed proteins with a different accumulation and cellular processes in infective stages. Activities of the cell wall-degrading enzymes cellulase and β-1,4-glucosidase were primarily active in haustorium development (T3), while xylanase, endo-glucanase, and peptidase were highly active in the haustorium penetration (T4) and xylem connection (T5). Patterns of auxins and cytokinin showed spatial concentrations in infective stages and moreover were involved in haustorium development. These results are the first evidence of proteins, cell wall-degrading enzymes, and phytohormones that are involved in early infection for the Psittacanthus genus, and thus represent a general infection mechanism for other mistletoe species. These results could help to understand the molecular dialogue in the establishment of P. calyculatus parasitism.
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Affiliation(s)
- Montserrat Aguilar-Venegas
- Ciencias Agrogenómicas, Escuela Nacional de Estudios Superiores, Unidad León, UNAM, León CP 37684, Guanajuato, Mexico
| | | | - Víctor Aguilar-Hernández
- Unidad de Bioquímica y Biología Molecular de Plantas, CICY, A.C., Mérida CP 97205, Yucatán, Mexico
| | | | - Efraín Conejo-Dávila
- Unidad Profesional Interdisciplinaria de Ingeniería Campus Guanajuato, Instituto Politécnico Nacional, Silao de la Victoria CP 36275, Guanajuato, Mexico
| | - Ligia Brito-Argáez
- Unidad de Bioquímica y Biología Molecular de Plantas, CICY, A.C., Mérida CP 97205, Yucatán, Mexico
| | - Víctor M. Loyola-Vargas
- Unidad de Bioquímica y Biología Molecular de Plantas, CICY, A.C., Mérida CP 97205, Yucatán, Mexico
| | - Julio Vega-Arreguín
- Ciencias Agrogenómicas, Escuela Nacional de Estudios Superiores, Unidad León, UNAM, León CP 37684, Guanajuato, Mexico
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Aoki N, Cui S, Ito C, Kumaishi K, Kobori S, Ichihashi Y, Yoshida S. Phenolic signals for prehaustorium formation in Striga hermonthica. FRONTIERS IN PLANT SCIENCE 2022; 13:1077996. [PMID: 36561443 PMCID: PMC9767415 DOI: 10.3389/fpls.2022.1077996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Accepted: 11/16/2022] [Indexed: 06/17/2023]
Abstract
Striga hermonthica is a root parasitic plant that causes considerable crop yield losses. To parasitize host plants, parasitic plants develop a specialized organ called the haustorium that functions in host invasion and nutrient absorption. The initiation of a prehaustorium, the primitive haustorium structure before host invasion, requires the perception of host-derived compounds, collectively called haustorium-inducing factors (HIFs). HIFs comprise quinones, phenolics, flavonoids and cytokinins for S. hermonthica; however, the signaling pathways from various HIFs leading to prehaustorium formation remain largely uncharacterized. It has been proposed that quinones serve as direct signaling molecules for prehaustorium induction and phenolic compounds originating from the host cell wall are the oxidative precursors, but the overlap and distinction of their downstream signaling remain unknown. Here we show that quinone and phenolic-triggered prehaustorium induction in S. hermonthica occurs through partially divergent signaling pathways. We found that ASBr, an inhibitor of acetosyringone in virulence gene induction in the soil bacterium Agrobacterium, compromised prehaustorium formation in S. hermonthica. In addition, LGR-991, a competitive inhibitor of cytokinin receptors, inhibited phenolic-triggered but not quinone-triggered prehaustorium formation, demonstrating divergent signaling pathways of phenolics and quinones for prehaustorium formation. Comparisons of genome-wide transcriptional activation in response to either phenolic or quinone-type HIFs revealed markedly distinct gene expression patterns specifically at the early initiation stage. While quinone DMBQ triggered rapid and massive transcriptional changes in genes at early stages, only limited numbers of genes were induced by phenolic syringic acid. The number of genes that are commonly upregulated by DMBQ and syringic acid is gradually increased, and many genes involved in oxidoreduction and cell wall modification are upregulated at the later stages by both HIFs. Our results show kinetic and signaling differences in quinone and phenolic HIFs, providing useful insights for understanding how parasitic plants interpret different host signals for successful parasitism.
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Affiliation(s)
- Natsumi Aoki
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
| | - Songkui Cui
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
- Department of Economic Plants and Biotechnology, Yunnan Key Laboratory for Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Chiharu Ito
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
| | - Kie Kumaishi
- RIKEN BioResource Research Center, Tsukuba, Japan
| | | | | | - Satoko Yoshida
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
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