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Molecular Mechanisms of Plant-Rhizosphere Communication

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Plant Sciences".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 7871

Special Issue Editors


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Guest Editor
Plant Physiology Unit, Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
Interests: plant's responses to abiotic stresses (nutrient deficiencies, water deficiency and salt stress); interaction among nutrients in plants and the impact of multiple nutrients stress on plant growth and metabolism; effect of belowground plant-microbe interactions on plant nutritional status
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Guest Editor
Universita degli Studi di Udine, Dipartimento di Scienze Agroalimentari, Udine, Italy
Interests: plant nutrition; interactions among different N-forms and other nutrients, role of natural effectors (e.g. humic substances) on plant nutrition, plant-soil-microbe interactions at the rhizosphere, plant response to abiotic stresses, trans-generational stress memory in plants

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Guest Editor
Department of Agricultural, Forest and Food Science, University of Torino, Largo Braccini 2, I-10095 Grugliasco, Italy

Special Issue Information

Dear Colleagues,

Plants are in constant communication with their environment and a multitude of diverse organisms. Their growth is finely controlled by regulatory signals perceived by roots, which are then translated into local and systemic physiological responses involving the activation of both specific and partially overlapping metabolic networks. The rhizosphere in particular, is a complex and multifaceted dynamic environment consisting of an integrated network of plant roots, soil and microorganisms. In the rhizosphere, plant roots exert a variety of biological functions by actively affecting the structure and abundance of rhizosphere communities and the plant-plant relationships through the release of ions and molecules via root exudation. Interaction of plants with rhizosphere microorganisms and neighboring plants is of paramount importance for their capacity to acquire nutrients, especially when they are poorly available for root uptake. Therefore, molecular signals influencing these interactions and root cells receptors that perceive their information have a great relevance for sustainable plant ecosystem productivity.

This Special Issue aims to collect scientific contributions (in the form of reviews or original articles) that can gain more insight into the molecular signals that allow plants to communicate with the rhizosphere to get nutritional and health benefits. main sub-topics of this issue include:

- Molecular signals and receptors controlling plant-rhizosphere communication

- Modes of signal perception and transduction by roots

- Nutrient-hormone signaling and crosstalk in the rhizosphere and in the plant

- Rhizosphere factors influencing plant-nutrient sensing

- Plant interactions with rhizosphere microorganisms

- Plant-plant interactions

- Cutting-edge technologies for studying plant-rhizosphere interactions

- Rhizosphere engineering: natural and synthetic plant-microbe interactions

Dr. Michela Schiavon
Dr. Laura Zanin
Dr. Veronica Santoro
Guest Editors

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Published Papers (2 papers)

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Research

19 pages, 2999 KiB  
Article
Metallothionein1A Regulates Rhizobial Infection and Nodulation in Phaseolus vulgaris
by Citlali Fonseca-García, Claudia Marina López-García, Ronal Pacheco, Elisabeth Armada, Noreide Nava, Rocío Pérez-Aguilar, Jorge Solis-Miranda and Carmen Quinto
Int. J. Mol. Sci. 2022, 23(3), 1491; https://doi.org/10.3390/ijms23031491 - 27 Jan 2022
Cited by 3 | Viewed by 2641
Abstract
Metallothioneins (MTs) constitute a heterogeneous family of ubiquitous metal ion-binding proteins. In plants, MTs participate in the regulation of cell growth and proliferation, protection against heavy metal stress, oxidative stress responses, and responses to pathogen attack. Despite their wide variety of functions, the [...] Read more.
Metallothioneins (MTs) constitute a heterogeneous family of ubiquitous metal ion-binding proteins. In plants, MTs participate in the regulation of cell growth and proliferation, protection against heavy metal stress, oxidative stress responses, and responses to pathogen attack. Despite their wide variety of functions, the role of MTs in symbiotic associations, specifically nodule-fabacean symbiosis, is poorly understood. Here, we analyzed the role of the PvMT1A gene in Phaseolus vulgaris-Rhizobium tropici symbiosis using bioinformatics and reverse genetics approaches. Using in silico analysis, we identified six genes encoding MTs in P. vulgaris, which were clustered into three of the four classes described in plants. PvMT1A transcript levels were significantly higher in roots inoculated with R. tropici at 7 and 30 days post inoculation (dpi) than in non-inoculated roots. Functional analysis showed that downregulating PvMT1A by RNA interference (RNAi) reduced the number of infection events at 7 and 10 dpi and the number of nodules at 14 and 21 dpi. In addition, nodule development was negatively affected in PvMT1A:RNAi transgenic roots, and these nodules displayed a reduced nitrogen fixation rate at 21 dpi. These results strongly suggest that PvMT1A plays an important role in the infection process and nodule development in P. vulgaris during rhizobial symbiosis. Full article
(This article belongs to the Special Issue Molecular Mechanisms of Plant-Rhizosphere Communication)
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17 pages, 2446 KiB  
Article
Dynamics of Bacterial Community Structure in the Rhizosphere and Root Nodule of Soybean: Impacts of Growth Stages and Varieties
by Soo-In Sohn, Jae-Hyung Ahn, Subramani Pandian, Young-Ju Oh, Eun-Kyoung Shin, Hyeon-Jung Kang, Woo-Suk Cho, Youn-Sung Cho and Kong-Sik Shin
Int. J. Mol. Sci. 2021, 22(11), 5577; https://doi.org/10.3390/ijms22115577 - 25 May 2021
Cited by 17 | Viewed by 4048
Abstract
Bacterial communities in rhizosphere and root nodules have significant contributions to the growth and productivity of the soybean (Glycine max (L.) Merr.). In this report, we analyzed the physiological properties and dynamics of bacterial community structure in rhizosphere and root nodules at [...] Read more.
Bacterial communities in rhizosphere and root nodules have significant contributions to the growth and productivity of the soybean (Glycine max (L.) Merr.). In this report, we analyzed the physiological properties and dynamics of bacterial community structure in rhizosphere and root nodules at different growth stages using BioLog EcoPlate and high-throughput sequencing technology, respectively. The BioLog assay found that the metabolic capability of rhizosphere is in increasing trend in the growth of soybeans as compared to the bulk soil. As a result of the Illumina sequencing analysis, the microbial community structure of rhizosphere and root nodules was found to be influenced by the variety and growth stage of the soybean. At the phylum level, Actinobacteria were the most abundant in rhizosphere at all growth stages, followed by Alphaproteobacteria and Acidobacteria, and the phylum Bacteroidetes showed the greatest change. But, in the root nodules Alphaproteobacteria were dominant. The results of the OTU analysis exhibited the dominance of Bradyrhizobium during the entire stage of growth, but the ratio of non-rhizobial bacteria showed an increasing trend as the soybean growth progressed. These findings revealed that bacterial community in the rhizosphere and root nodules changed according to both the variety and growth stages of soybean in the field. Full article
(This article belongs to the Special Issue Molecular Mechanisms of Plant-Rhizosphere Communication)
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