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Related Concept Videos

Microbe-Plant Interactions01:09

Microbe-Plant Interactions

Microbe-plant interactions represent a dynamic spectrum of associations shaped by intricate chemical signaling. These interactions can be neutral, beneficial, or detrimental, and profoundly influence plant physiology, growth, and ecosystem function. The plant microbiome, comprising bacteria, fungi, archaea, protists, and viruses, plays a pivotal role in mediating these effects through surface colonization, internal colonization, or systemic symbiosis.Mutualistic associations, particularly with...
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Production of Organic Acids

Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...
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Microorganisms play a crucial role in agriculture and the food industry, contributing to soil fertility, crop protection, and food production. Their functions range from nitrogen fixation and biopesticide production to fermentation and food preservation, making them indispensable to sustainable farming and food safety.Role in AgricultureNitrogen-fixing bacteria, such as Rhizobium (symbiotic) and Azotobacter (free-living), convert atmospheric nitrogen into ammonia through biological nitrogen...
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Environmental Applications of Microorganisms

Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
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Mutualism is a symbiotic interaction in which all participating organisms benefit. These relationships can be obligate or facultative and are fundamental to ecosystem functions across diverse biological systems.Plant–Fungi MutualismOne well-known example is the association between plant roots and mycorrhizal fungi, such as Rhizophagus species. The fungal hyphae penetrate the root hairs and the epidermis, forming an extensive hyphal network that establishes a symbiotic association. Through this...
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Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.

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Related Experiment Video

Updated: May 21, 2026

Production of Arbuscular Mycorrhizal (AM) Fungal Inoculum and Phenotypic Evaluation of Rice and AM Symbiosis Under Saline Conditions
07:43

Production of Arbuscular Mycorrhizal (AM) Fungal Inoculum and Phenotypic Evaluation of Rice and AM Symbiosis Under Saline Conditions

Published on: March 14, 2025

Artificial Humic Acid Derived from Microorganisms Promotes Root Growth of Rice Seedlings by Mediating Microbial

Fuhui Yu1, Bowen Fan2, Hongyu Li1

  • 1College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing 163319, China.

Journal of Agricultural and Food Chemistry
|May 19, 2026
PubMed
Summary

Microbial-derived artificial humic acid (AHA) significantly boosted rice seedling root growth and biomass. This novel LPRS-AHA also enhanced soil enzyme activities and beneficial microbial communities, supporting its use in agriculture.

Keywords:
LP-AHALPRS-AHARS-AHAmicrobial communityrice seedling roots

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Published on: March 11, 2020

Area of Science:

  • Agricultural Science
  • Soil Science
  • Microbiology

Background:

  • Artificial humic acid (AHA) is known to benefit soil and crops.
  • The specific impact of novel microbial-derived AHAs on plant root development and soil microbial communities requires further investigation.

Purpose of the Study:

  • To evaluate the effects of different sources of AHA, including a novel straw-fed microbial AHA (LPRS-AHA), on rice seedling root growth and soil microbial communities.
  • To elucidate the potential mechanisms behind LPRS-AHA's effects on plant-microbe interactions.

Main Methods:

  • An indoor study was conducted using rice seedlings.
  • Three types of AHA were tested: plant-derived, pure microbe-derived, and straw-fed microbial AHA (LPRS-AHA).
  • Measurements included root morphology, biomass, soil enzyme activities, and soil microbial community composition.

Main Results:

  • LPRS-AHA demonstrated the most significant positive effects on rice seedling growth.
  • Compared to the control (CK), LPRS-AHA significantly increased root length, surface area, volume, tip number, branches, and both root and shoot dry biomass.
  • LPRS-AHA enhanced soil enzyme activities (N-acetyl-β-d-glucosaminidase, alkaline phosphatase, l-leucine aminopeptidase) and reshaped the microbial community, enriching beneficial taxa like Pseudomonadota and Pseudomonas.

Conclusions:

  • Microbial-derived LPRS-AHA is a promising agent for enhancing rice seedling root growth and biomass.
  • LPRS-AHA improves soil health by increasing enzyme activities and fostering beneficial microbial communities, suggesting intensified plant-microbe interactions.
  • This study provides foundational evidence for developing microbial-derived AHA for agricultural applications, particularly in rice cultivation.