Related Experiment Video
Updated: Oct 17, 2025
05:37
Author Spotlight: Enhancing Rhizobacteria Colonization on Plant Roots for Improved Microbial Fertilizer Efficiency
Published on: March 1, 2024
1.1K
The moss traits that rule cyanobacterial colonization.
Xin Liu1,2,3, Kathrin Rousk2,3
1CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China.
Annals of Botany
|October 10, 2021
Summary
Moss traits like hydration rate and leaf structure significantly influence nitrogen fixation by cyanobacteria in high-latitude ecosystems. Understanding these factors improves predictions of nitrogen cycling in these environments.
Area of Science:
- Ecology
- Microbiology
- Botany
Background:
- Cyanobacteria associated with mosses are crucial nitrogen sources in pristine, high-latitude ecosystems.
- Interspecific variation in nitrogen (N2) fixation activity among moss species is not well understood.
- Identifying moss traits that influence cyanobacterial colonization is key to understanding N2 fixation.
Purpose of the Study:
- To identify specific moss traits that determine cyanobacterial colonization.
- To correlate these traits with N2 fixation activity in different moss species.
Main Methods:
- Studied four moss species with varying N2 fixation activity.
- Assessed cyanobacterial abundance and activity.
- Correlated N2 fixation with moss morphological, chemical, and water-balance traits.
Main Results:
- Moss hydration rate was a pivotal trait, explaining significant variation in N2 fixation and cyanobacterial colonization.
- Smaller leaves and higher leaf frequency correlated with greater cyanobacterial abundance.
- High phenol concentration inhibited N2 fixation but not colonization.
Conclusions:
- Interspecific variations in moss traits are primary drivers of differences in cyanobacterial colonization and N2 fixation activity.
- Identified key traits can improve predictions of N2 fixation based on moss morphology.
- Environmental factors also influence these traits, leading to intraspecific variation.
Related Concept Videos
01:30Bacterial Phylum Cyanobacteria
170
Cyanobacteria are a diverse group of oxygenic, phototrophic bacteria that played a pivotal role in converting Earth’s atmosphere from anoxic to oxygen-rich billions of years ago. They exhibit remarkable morphological diversity, ranging from unicellular forms to filamentous types, with cell sizes varying between 0.5 μm and 100 μm. Cyanobacteria are classified into five groups: Chroococcales (unicellular, dividing by binary fission), Pleurocapsales (unicellular, dividing by...
170
01:19Other Algae
135
The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...
135
01:28Anoxygenic Phototrophic Bacteria
279
Anoxygenic phototrophic bacteria are a diverse group of microorganisms that perform photosynthesis without producing oxygen. They primarily include purple sulfur bacteria, purple nonsulfur bacteria, green sulfur bacteria, and green nonsulfur bacteria. These bacteria are classified into the Gammaproteobacteria, Alphaproteobacteria, Betaproteobacteria, Chlorobi, and Chloroflexi lineages, each with distinct physiological and ecological adaptations.Purple sulfur bacteria belong to the...
279
01:23Red Algae
355
Red algae, also known as rhodophytes, are primarily found in marine environments, though some species inhabit freshwater and terrestrial ecosystems. These organisms exist in both unicellular and multicellular forms, with some multicellular varieties reaching macroscopic sizes.As phototrophic organisms, red algae contain chlorophyll a; however, their chloroplasts lack chlorophyll b. Instead, they possess phycobiliproteins, which serve as major light-harvesting pigments, similar to those found in...
355
01:21Green Algae
281
Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
281
01:30Bacterial Phylum Actinobacteria
194
Coryneform bacteria are gram-positive, aerobic, nonmotile rods that exhibit irregular, club-shaped, or V-shaped arrangements. Their V-shape results from snapping division, where the inner cell wall layer forms the cross-wall, while the outer layer remains intact until it ruptures on one side, causing the daughter cells to bend away.The primary genera are Corynebacterium and Arthrobacter. Corynebacterium includes diverse species, ranging from saprophytes to pathogens like Corynebacterium...
194