scholarly journals Endophytes from African Rice (Oryza glaberrima L.) Efficiently Colonize Asian Rice (Oryza sativa L.) Stimulating the Activity of Its Antioxidant Enzymes and Increasing the Content of Nitrogen, Carbon, and Chlorophyll

2021 ◽  
Vol 9 (8) ◽  
pp. 1714
Author(s):  
Carmen Bianco ◽  
Anna Andreozzi ◽  
Silvia Romano ◽  
Camilla Fagorzi ◽  
Lisa Cangioli ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Antioxidant Enzymes ◽  
Nitrogenase Activity ◽  
Oryza Sativa L ◽  
Tropical Region ◽  
Oryza Glaberrima ◽  
Bacterial Endophytes ◽  
African Rice ◽  
Asian Rice ◽  
Temperate Climates

Bacterial endophytes support the adaptation of host plants to harsh environments. In this study, culturable bacterial endophytes were isolated from the African rice Oryza glaberrima L., which is well-adapted to grow with poor external inputs in the tropical region of Mali. Among these, six N-fixer strains were used to inoculate O. glaberrima RAM133 and the Asian rice O. sativa L. cv. Baldo, selected for growth in temperate climates. The colonization efficiency and the N-fixing activity were evaluated and compared for the two rice varieties. Oryza sativa-inoculated plants showed a fairly good colonization efficiency and nitrogenase activity. The inoculation of Oryza sativa with the strains Klebsiella pasteurii BDA134-6 and Phytobacter diazotrophicus BDA59-3 led to the highest nitrogenase activity. In addition, the inoculation of ‘Baldo’ plants with the strain P. diazotrophicus BDA59-3 led to a significant increase in nitrogen, carbon and chlorophyll content. Finally, ‘Baldo’ plants inoculated with Kl. pasteurii BDA134-6 showed the induction of antioxidant enzymes activity and the maintenance of nitrogen-fixation under salt stress as compared to the unstressed controls. As these endophytes efficiently colonize high-yielding crop varieties grown in cold temperate climates, they become good candidates to promote their growth under unfavorable conditions.

scholarly journals Robustness and Strategies of Adaptation among Farmer Varieties of African Rice (Oryza glaberrima) and Asian Rice (Oryza sativa) across West Africa

PLoS ONE ◽  
2013 ◽  
Vol 8 (3) ◽  
pp. e34801 ◽  
Author(s):  
Alfred Mokuwa ◽  
Edwin Nuijten ◽  
Florent Okry ◽  
Béla Teeken ◽  
Harro Maat ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
West Africa ◽  
Oryza Glaberrima ◽  
African Rice ◽  
Asian Rice

scholarly journals Isolation and Characterization of Root-Associated Bacterial Endophytes and Their Biocontrol Potential against Major Fungal Phytopathogens of Rice (Oryza sativa L.)

Pathogens ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 172
Author(s):  
Maqsood Ahmed Khaskheli ◽  
Lijuan Wu ◽  
Guoqing Chen ◽  
Long Chen ◽  
Sajid Hussain ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Fungal Pathogens ◽  
Oryza Sativa L ◽  
Defense Responses ◽  
Growth And Yield ◽  
Bacterial Endophytes ◽  
16S Rrna Sequence ◽  
Resistance Response ◽  
Isolation And Characterization ◽  
Fungal Phytopathogens

Rice (Oryza sativa L.) is a major cereal food crop worldwide, and its growth and yield are affected by several fungal phytopathogens, including Magnaporthe oryzae, Fusarium graminearum, F. moniliforme, and Rhizoctonia solani. In the present study, we have isolated and characterized root-associated bacterial endophytes that have antifungal activities against rice fungal phytopathogens. A total of 122 root-associated bacterial endophytes, belonging to six genera (Bacillus, Fictibacillus, Lysinibacillus, Paenibacillus, Cupriavidus, and Microbacterium) and 22 species were isolated from three rice cultivars. Furthermore, the 16S rRNA sequence-based phylogeny results revealed that Bacillus was the most dominant bacterial genera, and that there were 15 different species among the isolates. Moreover, 71 root-associated endophytes showed antagonistic effects against four major fungal phytopathogens, including M. oryzae, F. graminearum, F. moniliforme, and R. solani. Additionally, the biochemical, physiological, and PCR amplification results of the antibiotic-related genes further supported the endophytes as potential biocontrolling agents against the rice fungal pathogens. Consequently, the findings in this study suggested that the isolated bacterial endophytes might have beneficial roles in rice defense responses, including several bioactive compound syntheses. The outcomes of this study advocate the use of natural endophytes as an alternative strategy towards the rice resistance response.

The inductive responses of the antioxidant enzymes by salt stress in the rice (Oryza sativa L.)

2001 ◽  
Vol 158 (6) ◽  
pp. 737-745 ◽  
Author(s):  
Dong Hee Lee ◽  
Young Sang Kim ◽  
Chin Bum Lee
Keyword(s):  
Oryza Sativa ◽  
Antioxidant Enzymes ◽  
Salt Stress ◽  
Oryza Sativa L

scholarly journals Sequence Variants Linked to Key Traits in Interspecific Crosses between African and Asian Rice

Plants ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1653
Author(s):  
Hayba Badro ◽  
Marie-Noelle Ndjiondjop ◽  
Agnelo Furtado ◽  
Robert Henry
Keyword(s):  
Association Analysis ◽  
Agronomic Traits ◽  
Heading Date ◽  
Sucrose Metabolism ◽  
Interspecific Crosses ◽  
Oryza Glaberrima ◽  
Gene Pools ◽  
Synonymous Snps ◽  
African Rice ◽  
Asian Rice

Asian and African rice gene pools vary in many traits that are important in rice breeding. The genetic basis of these differences was evaluated by analysis of important agronomic traits in crosses between African and Asian rice. Trait-associated variants (TAVs) influencing three quantitative agronomic traits, heading date (Hd), tiller number at maturity (T), and 1000 grain weight (TGW), were identified by association analysis of crosses between Asian and African rice. Populations were developed by crossing WAB56-104 (Oryza sativa) and CG14 (Oryza glaberrima). DNA from plants with extremely high or low values for these phenotypes was bulked and sequenced. The reference genome of O. sativa cv Nipponbare was used in general association analysis and candidate gene analysis. A total of 5152 non-synonymous single nucleotide polymorphisms (SNPs) across 3564 genes distinguished the low and the high bulks for Hd, T, and TGW traits; 611 non-synonymous SNPs across 447 genes were found in KEGG pathways. Six non-synonymous SNPs were found in the sequences of LOC107275952, LOC4334529, LOC4326177, LOC107275432, LOC4335790, and LOC107275425 genes associated with Hd, T, and TGW traits. These genes were involved in: abscisic-acid biosynthesis, carotenoid biosynthesis, starch and sucrose metabolism, and cytokinin biosynthesis. Analysis of 24 candidate genes associated with Hd, T, and TGW traits showed seven non-synonymous variations in the sequence of Hd3a and Ehd2 from the Hd genes (not in a KEGG pathway), D10 and D53 from the T genes (strigolactones biosynthetic pathway), and Gn1a and GIF1 from the TGW genes (cytokinin biosynthetic and starch and sucrose metabolism pathways). This study identified significant differences in allele frequencies supported by high sequence depth in analysis of bulks displaying high and low values for these key traits. These trait-associated variants are likely to be useful in rice improvement.

scholarly journals Determination of genetic variability of Asian rice (Oryza sativa L.) varieties using microsatellite markers

2009 ◽  
Vol 8 (21) ◽  
pp. 5641-5651 ◽  
Author(s):  
H Pervaiz Zahida ◽  
A Rabbani Malik ◽  
R Pearce Stephen ◽  
A Malik Salman
Keyword(s):  
Oryza Sativa ◽  
Genetic Variability ◽  
Microsatellite Markers ◽  
Oryza Sativa L ◽  
Asian Rice

Selenium ameliorates arsenic induced oxidative stress through modulation of antioxidant enzymes and thiols in rice (Oryza sativa L.)

Ecotoxicology ◽  
2014 ◽  
Vol 23 (7) ◽  
pp. 1153-1163 ◽  
Author(s):  
Amit Kumar ◽  
Rana Pratap Singh ◽  
Pradyumna Kumar Singh ◽  
Surabhi Awasthi ◽  
Debasis Chakrabarty ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Oryza Sativa ◽  
Antioxidant Enzymes ◽  
Oryza Sativa L
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