Seed Endophytes and Their Roles in Host Plant Stress Resistance

Mao, Wenqin; Wu, Yuanshuang; Li, Fang; Tang, Wei‐Guo; Gong, Wei; Han, Xue; White, James F.; Ji, Xiuling; Li, Haiyan

doi:10.1007/s42729-023-01279-3

Cited by 10 publications

(3 citation statements)

References 99 publications

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“…The close connection between the seed-borne bacteria and the seed causes a specific co-evolutionary effect, and the bacteria that mutually benefit from the seed also continue due to the vertical transmission of the seed-borne bacteria [ 35 ]. Studies have shown that the bacteria carried by seeds can not only be transmitted across generations by vertical transmission, but can also be transmitted through vascular bundles from parent plants into seeds [ 36 ].…”

Section: Discussionmentioning

confidence: 99%

Diversity and Biological Characteristics of Seed-Borne Bacteria of Achnatherum splendens

Yang,

Xie,

Chen

et al. 2024

Microorganisms

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As a high-quality plant resource for ecological restoration, Achnatherum splendens has strong adaptability and wide distribution. It is a constructive species of alkaline grassland in Northwest China. The close relationship between seed-borne bacteria and seeds causes a specific co-evolutionary effect which can enhance the tolerance of plants under various stresses. In this study, 272 bacterial isolates were isolated from the seeds of Achnatherum splendens in 6 different provinces of China. In total, 41 dominant strains were identified, and their motility, biofilm formation ability and antibiotic resistance were analyzed. The results showed that the bacteria of Achnatherum splendens belonged to 3 phyla and 14 genera, of which Firmicutes was the dominant phylum and Bacillus was the dominant genus. The motility and biofilm formation ability of the isolated strains were studied. It was found that there were six strains with a moving diameter greater than 8 cm. There were 16 strains with strong biofilm formation ability, among which Bacillus with biofilm formation ability was the most common, accounting for 37.5%. The analysis of antibiotic resistance showed that sulfonamides had stronger antibacterial ability to strains. Correlation analysis showed that the resistance of strains to aminoglycosides (kanamycin, amikacin, and gentamicin) was significantly positively correlated with their biofilm formation ability. This study provides fungal resources for improving the tolerance of plants under different stresses. In addition, this is the first report on the biological characteristics of bacteria in Achnatherum splendens.

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Section: Discussionmentioning

confidence: 99%

Diversity and Biological Characteristics of Seed-Borne Bacteria of Achnatherum splendens

Yang,

Xie,

Chen

et al. 2024

Microorganisms

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“…Elucidating the role of bacteria in this kind of environmental context could help contribute to the development of sustainable agricultural practices promoting ecosystem resilience, mitigating the impacts of climate change, and addressing the economic losses associated with desertification in the Mediterranean basin. Harnessing the capabilities of these bacteria through their application as biofertilizers offers a promising approach to enhancing crop productivity and ensuring food security in arid and semi-arid regions, where the impacts of salinity and drought stress on agriculture are particularly pronounced [8,[50][51][52].…”

Section: Discussionmentioning

confidence: 99%

Rhizosphere Bacterial Isolation from Indigenous Plants in Arid and Semi-Arid Algerian Soils: Implications for Plant Growth Enhancement

Novello,

Bona,

Toumatia

et al. 2023

Processes

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The Mediterranean area is one of the geographic zones most affected by land degradation and desertification and these conditions appear to be even more exacerbated by climate change. Based on this idea, this work aimed to isolate, identify, characterize, and select bacterial strains able to tolerate salinity and drought, which could possibly be used in agriculture as plant biofertilizers. The sampling of rhizosphere soil was performed in two Algerian regions, Ghardaïa and Djelfa (arid and semi-arid zones, respectively) in six provinces, targeting fourteen native plant species, known for their therapeutic use. A total of 288 bacterial strains were isolated, identified, and characterized for their growth at different temperatures and salt tolerance. Based on these capabilities, 95 isolates were selected. These strains underwent further evaluation for their plant-beneficial traits, including siderophore synthesis, auxin production, and phosphate solubilization. Additionally, we assessed their impact on tomato, cucumber, and sorghum seed germination. In a final screening step, nine bacterial strains were tested for their potential plant growth-promoting activity on tomato plants grown in semi-controlled conditions. Our results demonstrated that three strains (Bacillus simplex AH24, Microbacterium arborescens PU10, and Microbacterium paludicola AEA23) showed plant growth promotion activities on tomato.

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“…Plant endophytes mainly refer to fungi and bacteria that are symbiotic or parasitic in healthy plants 1 . They do not cause apparent lesions in plant tissues 2 , 3 , can synthesize substances needed for plant growth 4 , induce disease resistance in host plants 5 , and enhance plant resistance to environmental stress 6 . Some endophytes can be isolated from plant tissues undergoing rigorous surface disinfection.…”

Section: Introductionmentioning

confidence: 99%

High-throughput sequencing-based analysis of the composition and diversity of the endophyte community in roots of Stellera chamaejasme

Zhang,

Li,

Yin

et al. 2024

Sci Rep

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Stellera chamaejasme (S. chamaejasme) is an important medicinal plant with heat-clearing, detoxifying, swelling and anti-inflammatory effects. At the same time, it is also one of the iconic plants of natural grassland degradation in northwest China, playing a key role in the invasion process. Plant endophytes live in healthy plant tissues and can synthesize substances needed for plant growth, induce disease resistance in host plants, and enhance plant resistance to environmental stress. Therefore, studying the root endophytes of S. chamaejasme is of great significance for mining beneficial microbial resources and biological prevention and control of S. chamaejasme. This study used Illumina MiSeq high-throughput sequencing technology to analyze the composition and diversity of endophytes in the roots of S. chamaejasme in different alpine grasslands (BGC, NMC and XGYZ) in Tibet. Research results show that the main phylum of endophytic fungi in the roots of S. chamaejasme in different regions is Ascomycota, and the main phyla of endophytic bacteria are Actinobacteria, Proteobacteria and Firmicutes (Bacteroidota). Overall, the endophyte diversity of the NMC samples was significantly higher than that of the other two sample sites. Principal coordinate analysis (PCoA) and permutational multivariate analysis of variance (PERMANOVA) results showed significant differences in the composition of endophytic bacterial and fungal communities among BGC, NMC and XGYZ samples. Co-occurrence network analysis of endophytes showed that there were positive correlations between fungi and some negative correlations between bacteria, and the co-occurrence network of bacteria was more complex than that of fungi. In short, this study provides a vital reference for further exploring and utilizing the endophyte resources of S. chamaejasme and an in-depth understanding of the ecological functions of S. chamaejasme endophytes.

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Seed Endophytes and Their Roles in Host Plant Stress Resistance

Cited by 10 publications

References 99 publications

Diversity and Biological Characteristics of Seed-Borne Bacteria of Achnatherum splendens

Diversity and Biological Characteristics of Seed-Borne Bacteria of Achnatherum splendens

Rhizosphere Bacterial Isolation from Indigenous Plants in Arid and Semi-Arid Algerian Soils: Implications for Plant Growth Enhancement

High-throughput sequencing-based analysis of the composition and diversity of the endophyte community in roots of Stellera chamaejasme

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