Aquatic bacterial diversity: Magnitude, dynamics, and controlling factors

Shafi, Sana; Kamili, Azra N.; Shah, Manzoor Ahmad; Parray, Javid A.; Bandh, Suhaib A.

doi:10.1016/j.micpath.2017.01.016

Cited by 26 publications

(16 citation statements)

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“…This indicated that the particular reproductive units of A. marina, different in the developmental biology from seeds, host microorganisms with the potential of vertical transimission by mangrove plants, suggesting their crucial ecological role for mangrove establishment. These phyla were found to be abundantly present also in other plant tissues (Truyens et al, 2015) and were reported as dominant in soil and acquatic ecosystems (Fierer et al, 2012;Shafi et al, 2017). Furthermore, several genera in our endophyte collection (e.g.…”

Section: Discussionsupporting

confidence: 51%

Bacterial endophytes of mangrove propagules elicit early establishment of the natural host and promote growth of cereal crops under salt stress

Soldan

Mapelli

Crotti

et al. 2019

Microbiological Research

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Mangroves, dominating tropical intertidal zones and estuaries, are among the most salt tolerant plants, and propagate through reproductive units called propagules. Similarly to other plants' seeds, propagules may harbor beneficial bacteria. Our hypothesis was that mangroves, being able to grow into seawater, should harbor bacteria able to interact with the host and to exert positive effects under salt stress, which could be exploited to improve crop production. Therefore, we isolated bacterial endophytes from mangrove propagules with the aim to test whether these bacteria have a beneficial potential on their natural host and on different crops like barley and rice, cultivated under salt stress. The 172 bacterial isolates obtained were screened for plant growth promotion (PGP) activities in vitro, and the 12 most promising isolates were tested on barley under non-axenic conditions and salt stress. Gordonia terrae KMP456-M40 was the best performing isolate, increasing ear weight by 65%. Basing on the in vivo PGP activity and the root colonization ability, investigated by fluorescence in situ hybridization and confocal microscopy, three strains were additionally tested on mangrove propagule germination and on rice growth. The most effective strain was again G. terrae KMP456-M40, which enhanced the root length of mangrove seedlings and the biomass of salt-stressed rice under axenic conditions up to 65% and 62%, respectively. We demonstrated that propagules, the reproductive units of mangroves, host beneficial bacteria that enhance the potential of mangrove seedlings establishment and confer salt tolerance to cereal crops.

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Section: Discussionsupporting

confidence: 51%

Bacterial endophytes of mangrove propagules elicit early establishment of the natural host and promote growth of cereal crops under salt stress

Soldan

Mapelli

Crotti

et al. 2019

Microbiological Research

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“…These harsh conditions alter the hydrology and structure of the lake and may affect the microbial community composition and biogeochemical functions (Liu et al., ; Rose et al., ; Wasserstrom et al., ). Since alpine lakes have been reported to be early indicators of environmental change, the function of microorganisms in the related processes has attracted new research interest (Shafi, Kamili, Shah, Parray, & Bandh, ). Microorganisms are rich in genetic diversity and an essential part of aquatic ecosystems and play important roles in global biogeochemical cycles (Newton, Jones, Eiler, Mcmahon, & Bertilsson, ).…”

Section: Introductionmentioning

confidence: 99%

Microbial community composition in alpine lake sediments from the Hengduan Mountains

et al. 2019

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Microbial communities in sediments play an important role in alpine lake ecosystems. However, the microbial diversity and community composition of alpine lake sediments from the Hengduan Mountains remain largely unknown. Therefore, based on the Illumina MiSeq platform, high‐throughput sequencing analysis of the 16S rRNA gene was performed on 15 alpine lake sediments collected at different locations in the Hengduan Mountains. The abundance‐based coverage estimate (ACE), Chao1, and Shannon indices indicated that the microbial abundance and diversity of these sediments were high. There are some differences in the composition of microbial communities among sediments. However, in general, Proteobacteria accounted for the largest proportion of all sediments (22.3%–67.6%) and was the dominant phylum. Followed by Bacteroidetes, Acidobacteria, Chloroflexi, and Planctomycetes. In addition, the operational taxonomic unit (OTU) interactions network had modular structures and suggested more cooperation than competition in the microbial community. Besides, we also found that temperature has a significant contribution to the sample–environment relationship. This study revealed the diversity and composition of microbial communities in alpine lake sediments from the Hengduan Mountains, and describe the correlation between microbial community structure and different environmental variables.

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“…Numerous abiotic and biotic factors (e.g., temperature, oxygen, pH, conductivity, water transparency, organic matter concentration, biodegradable nutrients, water current, Bacteriophages , Zooplanktons, Chlorophyll a (Chla) content are the factors affecting microbial communities in aquatic habitat (Beier et al, 2008;Lliro et al, 2014;Hayden and Beman, 2016). It is very essential to identify and characterize bacterial community to get the information about the ecological niches of bacteria in freshwater bodies (Shafi et al, 2017) and Namita Paudel Adhikari , Subash Adhikari and Ganesh Paudel Janapriya Journal of Interdisciplinary Studies (Jjis), volume VIII, 2019 202 assess the impact of anthropogenic activities (Wang et al, 2017) as well as the status of pollutants in water bodies (Unno et al, 2012). Due to the short generation time, bacteria can rapidly respond to the small change in environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Bacterial Diversity in Aquatic Ecosystems over the Central Himalayas, Nepal: Progress and Future Perspectives

Adhikari

Paudel

2019

Janapriya J. Interdisciplinary Stud.

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Nepal hosts a large area of freshwater aquatic ecosystem including glacier associated system like glacier-fed streams and lakes as well as stream fed lowland lakes. Bacteriological studies are very important in aquatic ecosystems as bacteria are the major participants in biogeochemical cycles and food web structures. This study reviewed available literature in bacteriological studies of aquatic ecosystems in the Central Himalayas, Nepal and revealed that such studies are very limited. Thus, we conclude that future research works need to proceed through the latest molecular methods with high throughput technique using multiple environmental factors in the aquatic ecosystem.

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Aquatic bacterial diversity: Magnitude, dynamics, and controlling factors

Cited by 26 publications

References 100 publications

Bacterial endophytes of mangrove propagules elicit early establishment of the natural host and promote growth of cereal crops under salt stress

Bacterial endophytes of mangrove propagules elicit early establishment of the natural host and promote growth of cereal crops under salt stress

Microbial community composition in alpine lake sediments from the Hengduan Mountains

Bacterial Diversity in Aquatic Ecosystems over the Central Himalayas, Nepal: Progress and Future Perspectives

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