Related Experiment Video
Updated: Jul 12, 2026
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
Beggiatoa: occurrence in the rice rhizosphere
Science (New York, N.Y.)
|December 1, 1972
Summary
Rice root tips possess catalase-like activity, promoting the growth of Beggiatoa bacteria. This bacterium oxidizes toxic hydrogen sulfide in paddy soil, suggesting a beneficial relationship with rice plants.
Area of Science:
- Microbial ecology
- Plant-microbe interactions
- Soil science
Background:
- Paddy soils contain toxic hydrogen sulfide, harmful to rice plants.
- Beggiatoa bacteria are known to oxidize hydrogen sulfide.
- Rice root tips exhibit catalase-like activity.
Purpose of the Study:
- To investigate the association between rice root catalase-like activity and the presence of Beggiatoa.
- To explore the potential role of Beggiatoa in mitigating hydrogen sulfide toxicity in rice.
Main Methods:
- Isolation of Beggiatoa from rice field soil.
- Observation of catalase-like activity around rice root tips.
Main Results:
- Beggiatoa was successfully isolated from rice field soil.
- Catalase-like activity was detected surrounding rice root tips.
- The presence of Beggiatoa appears to be favored by this activity.
Conclusions:
- Rice root catalase-like activity supports Beggiatoa colonization.
- Beggiatoa may play a crucial role in detoxifying hydrogen sulfide for rice in paddy environments.
- A mutually beneficial interaction between rice and Beggiatoa is proposed.
Related Concept Videos
02:11The Roles of Bacteria and Fungi in Plant Nutrition
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.
01:09Microbe-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...
00:46Bioremediation
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
01:29Soil Microbial Ecology
Soil microbial ecology is defined by highly diverse, spatially structured communities that drive nutrient cycling, organic matter turnover, and overall ecosystem stability. Although a gram of soil can contain thousands of bacterial and archaeal taxa, the ecological processes they mediate are even more crucial for sustaining terrestrial life.Microhabitats and NichesSoil is a heterogeneous mixture of minerals, organic matter, water, and air. Microbes inhabit distinct microhabitats formed by...
01:22Inorganic Nitrogen Assimilation
Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme nitrate reductase...
01:27Microbial Leaching
Microbial leaching, also known as bioleaching, is an environmentally favorable method for extracting metals from low-grade ores using specific microorganisms. This biotechnological approach is particularly valuable for mining operations targeting copper, gold, and uranium, where traditional extraction methods may be economically or environmentally impractical.Copper Leaching and Microbial CatalysisIn copper bioleaching, crushed ore is arranged into heaps and irrigated with a dilute sulfuric...