Related Experiment Video
Updated: May 29, 2026
11:16
A Hydroponic Co-cultivation System for Simultaneous and Systematic Analysis of Plant/Microbe Molecular Interactions and Signaling
Published on: July 22, 2017
Interaction of endophytic microbes with legumes
S S Dudeja1, Rupa Giri, Ranjana Saini
1Department of Microbiology, CCS Haryana Agricultural University, Hisar, India. ssdudeja@gmail.com
Journal of Basic Microbiology
|September 29, 2011
Summary
Plant endophytes, including bacteria and fungi, enhance growth by aiding nutrient acquisition and defense. While their benefits are clear, the precise mechanisms of interaction and mutual benefit require further investigation.
Area of Science:
- Microbial Ecology
- Plant-Microbe Interactions
- Plant Physiology
Background:
- Bacterial and fungal endophytes reside within plant tissues, with populations varying widely.
- These microbes are known to enhance plant establishment and growth, particularly under stress.
- Endophytes employ diverse mechanisms, including nutrient mobilization, pathogen inhibition, and phytohormone production.
Purpose of the Study:
- To explore the multifaceted roles of endophytes in promoting plant growth.
- To investigate the mechanisms by which endophytes establish and interact within host plants.
- To clarify the mutualistic benefits and ecological dynamics between plants and endophytic microbes.
Main Methods:
- Review of existing literature on endophytic microbes in various plant tissues.
- Analysis of reported mechanisms for plant growth promotion by endophytes.
- Discussion of factors influencing endophyte population density and host specificity.
Main Results:
- Endophytes facilitate nutrient uptake (nitrogen fixation, phosphate solubilization), deter pathogens, and produce plant growth hormones.
- Mechanisms include siderophore production, enhanced systemic resistance, and ethylene level regulation via ACC deaminase.
- Endophyte establishment requires host compatibility and colonization without triggering pathogen recognition.
Conclusions:
- Endophytes offer significant benefits to plants through various physiological and protective mechanisms.
- The precise molecular signaling, colonization processes, and extent of mutual benefits remain incompletely understood.
- Further research is needed to elucidate the complex interactions within planta and the ecological significance of endophyte communities.
Related Concept Videos
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...
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.
01:26Microbial Interactions: Cooperation
Microbial cooperation involves beneficial interactions in which different species work together for individual or mutual advantage. These interactions can profoundly influence ecological dynamics and evolutionary processes, and they are essential to many pathogenic and symbiotic relationships.Nematode–Bacteria CooperationA striking example is the relationship between the Gram-negative bacterium Xenorhabdus nematophila and the parasitic nematode Steinernema carpocapsae. Juvenile nematodes...
01:25Microbial Interactions: Mutualism
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...
01:22Microbial Interactions: Parasitism
Parasitism is a form of microbial interaction in which parasitic microbes exploit a host organism for nutrients and shelter, often at the host's expense. Unlike mutualistic relationships, where both organisms benefit, parasitism benefits only the parasite and harms the host.Classification of ParasitesMicrobial parasites are broadly classified based on their location relative to the host.Ectoparasites remain on the host’s surface, such as the skin or outer tissues, drawing nutrients...
02:40Epiphytes, Parasites, and Carnivores
Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the biosynthesis of the...