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Agriculture
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Advanced Research of Crop Plant Interactions with Bacteria and Fungi
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Advanced Research of Crop Plant Interactions with Bacteria and Fungi

A special issue of Agriculture (ISSN 2077-0472). This special issue belongs to the section "Crop Protection, Diseases, Pests and Weeds".

Deadline for manuscript submissions: closed (20 July 2022) | Viewed by 18316

Special Issue Editors

Dr. Beatrice Berger

E-Mail Website
Guest Editor
Julius Kühn Institut (JKI) - Federal Research Centre for Cultivated Plants, Insitute for Plant Protection in Field Crops and Grasslands, Messeweg 11/12, 38104 Braunschweig, Germany
Interests: plant environmental stress physiology and plant defense; plant–microbe and plant–pathogen interaction; plant protection
Special Issues, Collections and Topics in MDPI journals
Dr. Matthias Becker

E-Mail Website
Guest Editor
Julius Kühn Institut (JKI) - Federal Research Centre for Cultivated Plants, Institute for National and International Plant Health, Messeweg 11/12, 38104 Braunschweig, Germany
Interests: plant–microbe and bacterial–fungal interactions; sustainable agriculture

Special Issue Information

Dear Colleagues,

A complex community of bacteria and fungi affects crop production in the field. Gaining knowledge on the interaction of plants with microorganisms is pivotal to optimize plant cultivation, including aspects of food quality, food safety, and integrated plant protection. This accounts not only for mutualists (often endophytes) and pathogens but also for commensals that may compete for niches in the plant rhizosphere and/or phyllosphere. From the first contact with bacteria or fungi, plants respond with a cascade of reactions eliciting substantial changes in their metabolism depending on the nature of the interaction (pathogenic or beneficial), but often the mechanisms of action are rarely known in detail. Next to rating plant growth and performance by physiological and morphological parameters, looking at plant responses with through a microscopic view and on a molecular level helps to determine the impact of microorganisms.

This Special Issue is intended to provide an insight into plant–microbe interactions presenting new results (in the form of scientific research articles, short communications, and reviews) on phenotypic, molecular, and metabolite level changes of crop plants during the interaction with symbionts and pathogens. We also welcome contributions describing innovative technical approaches for detecting microbial and plant-derived signals or metabolites that help deciphering the microbial impact on plants.

Dr. Beatrice Berger
Dr. Matthias Becker
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Agriculture is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • plant–bacteria interaction
  • plant–fungi interaction
  • plant signaling networks
  • plant secondary metabolites
  • agricultural and horticultural crop production
  • plant growth promotion
  • stress tolerance
  • integrated pest and pathogen management

Published Papers (5 papers)

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Research

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15 pages, 2779 KiB  
Article
Identification and Expression Profiling of TGA Transcription Factor Genes in Sugarcane Reveals the Roles in Response to Sporisorium scitamineum Infection
by Zhengying Luo, Xin Hu, Zhuandi Wu, Xinlong Liu, Caiwen Wu and Qianchun Zeng
Agriculture 2022, 12(10), 1644; https://0-doi-org.brum.beds.ac.uk/10.3390/agriculture12101644 - 08 Oct 2022
Cited by 3 | Viewed by 1545
Abstract
TGA transcription factor (TF) family genes play a major role in the regulation of plant growth and development as well as in the defense against pathogen attack. Little is known about the TGA family genes and their functions in sugarcane. Here, a total [...] Read more.
TGA transcription factor (TF) family genes play a major role in the regulation of plant growth and development as well as in the defense against pathogen attack. Little is known about the TGA family genes and their functions in sugarcane. Here, a total of 16 TGA members were identified in the sugarcane genome by bioinformatic approaches. All members exhibited similar conserved motifs and contained a bZIP domain and a DOG1 domain, except for ShTGA15/16. Phylogenetic analysis demonstrated that 16 ShTGA family genes could be divided into eight clades, and evolved differently from Arabidopsis TGAs. All ShTGA family genes suffered a purifying selection during evolution. A wide range of cis-regulatory elements were found in the promoter of ShTGA genes including hormone regulatory elements, adversity response elements, light responsive elements, and growth and development regulatory elements. Most ShTGA expressions were increased in bud growth and developmental processes except for ShTGA10/11. It is worth noting that the expression of ShTGA13 was decreased after sugarcane was infected with Sporisorium scitamineum, and it was highly expressed in the resistant variety compared to the susceptible variety. Adding IAA, GA3 and SA restored the expression of ShTGA13, suggesting an association with plant hormone regulatory pathways. Our study provides a framework for further functional studies of important ShTGA genes in development and stress response, and uncovered a previously unrecognized role of ShTGA13 in regulating resistance against S. scitamineum. Full article
(This article belongs to the Special Issue Advanced Research of Crop Plant Interactions with Bacteria and Fungi)
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13 pages, 1230 KiB  
Article
Pseudomonas syringae Infection Modifies Chlorophyll Fluorescence in Nicotiana tabacum
by Magdalena Tomaszewska-Sowa, Norbert Keutgen, Tomáš Lošák, Anna Figas and Anna J. Keutgen
Agriculture 2022, 12(9), 1504; https://0-doi-org.brum.beds.ac.uk/10.3390/agriculture12091504 - 19 Sep 2022
Viewed by 1691
Abstract
The system Nicotiana tabacum L.—Pseudomonas syringae VAN HALL pv. tomato (Pto) DC3000 was investigated at a low inoculation level (c. 5 × 105 colony-forming units (CFU) mL–1) such as it occurs in the field. The aim of this study [...] Read more.
The system Nicotiana tabacum L.—Pseudomonas syringae VAN HALL pv. tomato (Pto) DC3000 was investigated at a low inoculation level (c. 5 × 105 colony-forming units (CFU) mL–1) such as it occurs in the field. The aim of this study was to test the hypothesis that N. tabacum, a non-host of Pto DC3000, improved the PSII efficiency in inoculated leaves compared with control detached leaves. Visible symptoms at the infected area were not detected within 14 days. Chlorophyll (Chl) a fluorescence was measured 6–7 days after inoculation of detached leaves. Compared with the control, the actual photochemical quantum yield of photosystem (PS) II was higher in the inoculated leaves at the expense of the fraction of heat dissipated by photo-inactivated non-functional centers. In addition, the fraction of open PSII reaction centers (RCs) was higher in inoculated leaves. Maximum fluorescence in the dark-adapted detached inoculated leaves, as a measure of the absorbed energy, was lower than in control leaves. The lower capacity to absorb energy in combination with a higher fraction of open PSII RCs is interpreted as an acclimation to limit over-excitation and to reduce heat dissipation. This should limit the production of reactive oxygen species and reduce the probability of a hypersensitive response (HR), which represents an expensive cell-death program for the plant. Full article
(This article belongs to the Special Issue Advanced Research of Crop Plant Interactions with Bacteria and Fungi)
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14 pages, 5663 KiB  
Article
Phylogeny and Pathogenicity of Phytophthora Species Associated with Artichoke Crown and Root Rot and Description of Phytophthora marrasii sp. nov.
by Carlo Bregant, Giovanni Rossetto, Antonio Deidda, Lucia Maddau, Antonio Franceschini, Giorgio Ionta, Alessandro Raiola, Lucio Montecchio and Benedetto T. Linaldeddu
Agriculture 2021, 11(9), 873; https://0-doi-org.brum.beds.ac.uk/10.3390/agriculture11090873 - 12 Sep 2021
Cited by 3 | Viewed by 4802
Abstract
Field surveys conducted on nine farms over a 2-year period showed the widespread presence of Phytophthora-related diseases on globe artichoke plants in the main growing area in Sardinia (Italy). Characteristic symptoms included wilting and necrosis of the outermost leaves and dark brown [...] Read more.
Field surveys conducted on nine farms over a 2-year period showed the widespread presence of Phytophthora-related diseases on globe artichoke plants in the main growing area in Sardinia (Italy). Characteristic symptoms included wilting and necrosis of the outermost leaves and dark brown discoloration of stem tissues, as well as root rot. A total of 18 Phytophthora colonies belonging to three species were isolated and characterized. Based on morphological features and ITS sequence data, Phytophthora isolates were identified as P. crassamura (eight isolates) and P. cactorum (four isolates). Six isolates could not be assigned to any formally described species of Phytophthora and are therefore described here as Phytophthora marrasii sp. nov. The ITS phylogeny places P. marrasii in a terminal clade basal to the sister taxa (P. foliorum, P. hibernalis, P. lateralis, and P. ramorum) of the clade 8c. In particular, P. marrasii is phylogenetically related to P. foliorum, a species from which it differs in 62 nucleotides in the ITS region. At the same time, it can easily be distinguished morphologically from P. foliorum mainly because of the low minimum temperature for growth, the bigger and persistent non-papillate sporangia, and smaller oogonia. Pathogenicity tests confirmed that all three Phytophthora species are pathogenic on globe artichokes, which represent a new host for these pathogens. Full article
(This article belongs to the Special Issue Advanced Research of Crop Plant Interactions with Bacteria and Fungi)
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15 pages, 3400 KiB  
Article
Microbial Interactions and Roles in Soil Fertility in Seasonal Freeze-Thaw Periods under Different Straw Returning Strategies
by Mengqi Sun, Baoyu Chen, Hongjun Wang, Nan Wang, Taigang Ma, Yingshun Cui, Tianhao Luan, Seongjun Chun, Chunguang Liu and Lichun Wang
Agriculture 2021, 11(8), 779; https://0-doi-org.brum.beds.ac.uk/10.3390/agriculture11080779 - 15 Aug 2021
Cited by 9 | Viewed by 3473
Abstract
With the increase of world food demand, the intensity of cultivated land use also increased. To improve soil nutrient concentrations and crop yield, several straw returning techniques have been developed. Studies have shown that straw returning is beneficial to soil, but few studies [...] Read more.
With the increase of world food demand, the intensity of cultivated land use also increased. To improve soil nutrient concentrations and crop yield, several straw returning techniques have been developed. Studies have shown that straw returning is beneficial to soil, but few studies have focused on the relationship between microbes and fertility in seasonal freeze-thaw periods. A two-year cropland experiment was set up that comprised three different straw return strategies, namely covering tillage with straw return for two years (CS), rotary tillage and straw return for two years (RS), rotary covering tillage with straw return (first year covering and the second year rotary tillage) (CRS), and conventional tillage with no straw return (CK). Illumina Miseq high throughput sequencing of 16S rRNA was applied to assess bacteria community structure. The relationship between bacteria community structure and changes in soil fertility induced by different straw incorporating during seasonal trends was studied. Our results showed that soil bacterial communities varied significantly during the soil seasonal freeze-thaw period in the northwest of Jilin province, China, and were influenced, to some extent, by the different straw returning procedures. Multidimensional analysis revealed that total phosphorus (TP), available nitrogen (AN), and total nitrogen (TN) were the major drivers of bacterial community structure. The co-occurrence network was divided into several modules. Notably, the major bacterial modules varied significantly in different sampling periods and different treatments. These results suggested that specific bacterial groups could contribute to soil fertility in relation to environmental fluctuations. Some bacterial groups (e.g., Pyrinomonadales, Rhizobiales, Sphingomonadales, and Xanthomonadales, in order level) were directly linked with specific environmental factors, indicating the key roles of these groups in soil fertility. In summary, the soil bacterial communities varied significantly during the freeze-thaw period and might play important roles in the degradation of straw. Thus, the straw return could enhance soil fertility. Full article
(This article belongs to the Special Issue Advanced Research of Crop Plant Interactions with Bacteria and Fungi)
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Review

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13 pages, 784 KiB  
Review
Associations of Pantoea with Rice Plants: As Friends or Foes?
by Febri Doni, Nurul Shamsinah Mohd Suhaimi, Budi Irawan, Zulqarnain Mohamed and Muhamad Shakirin Mispan
Agriculture 2021, 11(12), 1278; https://0-doi-org.brum.beds.ac.uk/10.3390/agriculture11121278 - 16 Dec 2021
Cited by 15 | Viewed by 5196
Abstract
Pantoea species are gram-negative bacteria from the Enterobacteriaceae family, generally associated with plants, either as epiphytes or as pathogens. In the last decade, Pantoea species are being regarded as re-emerging pathogens that are the causal agents of various diseases in rice plants. Inherently, [...] Read more.
Pantoea species are gram-negative bacteria from the Enterobacteriaceae family, generally associated with plants, either as epiphytes or as pathogens. In the last decade, Pantoea species are being regarded as re-emerging pathogens that are the causal agents of various diseases in rice plants. Inherently, they are also known to be opportunistic plant symbionts having the capacity to enhance systemic resistance and increase the yield of rice plants. It is unclear how they can express both beneficial and pathogenic traits, and what factors influence and determine the outcome of a particular Pantoea–rice plant interaction. This review aims to compare the characteristics of rice plant-beneficial and pathogenic strains belonging to the Pantoea species and gain new insights, enabling distinction among the two types of plant–microbe interactions. Full article
(This article belongs to the Special Issue Advanced Research of Crop Plant Interactions with Bacteria and Fungi)
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