scholarly journals Do Phaseolus vulgaris Development Stages Influence the Total Rhizospheric Bacterial and the Phytate Utilising Community?

Author(s):  
R. T. Maougal ◽  
M. Kechid ◽  
K. Baziz ◽  
A. Djekoun

Background: The occupation of soil by plants is known to induce changes in the soil chemical and physical properties by shoot decomposition and root growth and secretion. Methods: In this study we investigate the degree to which the total and the phytate mineralising rhizospheric communities bacteria are affected by the growth of six Recombinant Inbred Lines (RILs) of common bean (Phaseolus vulgaris). The six RILs tested were contrasted on adaptation to P (phosphorus)-deficiency from sensitive to tolerant. Rhizosphere samples were taken three times during the plant developmental stage and the changes in the density and the phytase activity of those communities relative to the P content were studied. Bacterial community was followed by culturing and measuring total community DNA of soil to allow a cultivation- independent analysis, by amplification of the 16S rRNA gene using real time PCR. Result: Our results showed that successional moves in the rhizosphere bacterial density as plant mature confirmed that plants select their own rhizosphere community. Moves of the bacterial community in the rhizosphere were more pronounced in mature common bean and phytase enzymatic activity confirmed the ability of this plant to mobilise a functional bacterial community when the bean needs high quantities of phosphorus. This study demonstrates that common bean selects a microbial community and its density change in response to plant growth.

2005 ◽  
Vol 162 (3) ◽  
pp. 309-315 ◽  
Author(s):  
Moez Jebara ◽  
Mohamed Elarbi Aouani ◽  
Hélène Payre ◽  
Jean-Jacques Drevon

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9423
Author(s):  
Aarón Barraza ◽  
Juan Carlos Vizuet-de-Rueda ◽  
Raúl Alvarez-Venegas

The common bean (Phaseolus vulgaris L.) is the most important grain legume in the human diet with an essential role in sustainable agriculture mostly based on the symbiotic relationship established between this legume and rhizobia, a group of bacteria capable of fixing atmospheric nitrogen in the roots nodules. Moreover, root-associated bacteria play an important role in crop growth, yield, and quality of crop products. This is particularly true for legume crops forming symbiotic relationships with rhizobia, for fixation of atmospheric N2. The main objective of this work is to assess the substrate and genotype effect in the common bean (Phaseolus vulgaris L.) root bacterial community structure. To achieve this goal, we applied next-generation sequencing coupled with bacterial diversity analysis. The analysis of the bacterial community structures between common bean roots showed marked differences between substrate types regardless of the genotype. Also, we were able to find several phyla conforming to the bacterial community structure of the common bean roots, mainly composed by Proteobacteria, Actinobacteria, Bacteroidetes, Acidobacteria, and Firmicutes. Therefore, we determined that the substrate type was the main factor that influenced the bacterial community structure of the common bean roots, regardless of the genotype, following a substrate-dependent pattern. These guide us to develop efficient and sustainable strategies for crop field management based on the soil characteristics and the bacterial community that it harbors.


2016 ◽  
Vol 7 (1) ◽  
pp. 41
Author(s):  
Luis A. Gómez ◽  
Vincent Vadez ◽  
Germán Hernández ◽  
Tamara Sánchez ◽  
Vidalina Toscano

Ten common bean genotypes (Jamapa, APN18, Carioca, Río Tibají, Porrillo, Pot 51, Bat 271, Bolita 42, Calima y CC25-9N) were grown in an intensively aereated nutritive solution with 5 weekly doses of phosphorus (0; 62,5; 125; 187,5 and 1875 mM/plant) and 2 mM of N in the form of KNO3. The objective was to evaluatefoliar biomass and its P content, as well as, to calculate the P Use Efficiency (PUE) parameter based on these and relate them with the concentration levels with which plants were nourished. The optimum requirement level obtained fromboth biomass and PUE criteria ranged between 62,5 - 187,5 mM/plant/week; this supported differences for P nutrition within the genera. Pot 51 showed the lowest requirement and Carioca the highest for optimum yielding; but Bat 271 exhibited the highest efficiency index even at a suboptimum level. Among these genotypes, CC25-9N showed the lowest efficiency and Porrillo showed no variation for this parameter. It may be concluded that the highest efficiency point coincided in 80 % of the cases with the maximum biomass production point.


2013 ◽  
Vol 13 (1) ◽  
pp. 26 ◽  
Author(s):  
Rosaura Aparicio-Fabre ◽  
Gabriel Guillén ◽  
Montserrat Loredo ◽  
Jesús Arellano ◽  
Oswaldo Valdés-López ◽  
...  

Symbiosis ◽  
2009 ◽  
Vol 47 (3) ◽  
pp. 141-149 ◽  
Author(s):  
Saber Kouas ◽  
Julien Louche ◽  
Ahmed Debez ◽  
Claude Plassard ◽  
Jean Jacques Drevon ◽  
...  

Genome ◽  
2003 ◽  
Vol 46 (2) ◽  
pp. 259-267 ◽  
Author(s):  
Aaron D Beattie ◽  
Tom E Michaels ◽  
K Peter Pauls

Recovery of superior individuals from a cross based solely on the phenotypic characteristics of single-plant selections is inefficient because some traits, like yield, have low heritabilities, or because it is difficult to create the correct conditions for selection, as with disease resistance. In contrast, molecular markers are highly heritable and unaffected by environmental conditions. The objective of this study was to investigate the potential of molecular markers to identify superior lines in a breeding population by examining relationships between genetic distances (GDs) and phenotypic data for eight agronomic and architectural traits (branch angle, height, hypocotyl diameter, lodging, maturity, upper pods, pods per plant, and yield) obtained from three locations over a two-year period. From an elite common bean (Phaseolus vulgaris L.) cross, 110 recombinant inbred lines (RILs) and the two parents were screened with 116 random amplified polymorphic DNA (RAPD) markers. Pairwise GD values were calculated between each line and a selected "target" (the parent 'OAC Speedvale') using the Jaccard method and correlated to the trait data. The correlations were low and non-significant for all traits, except for branch angle (r = 0.30), maturity (r = –0.25), and pods per plant (r = 0.35). The lines were also grouped according to their cluster-based GD from the target parent using UPGMA cluster analysis. Trait data of lines within groups were combined and correlated to cluster-based GD. Correlation values were large and significant for all traits. Additionally, one-half of the top 10 yielding lines and nearly one-third of the best phenotypically ranked lines were present within the 13% of lines clustered nearest the target. A selection method using marker-based cluster analysis (MBCA) is suggested to assist phenotypic selection by directing a breeder's attention to a subsample of the population containing a high proportion of superior lines.Key words: genetic distance, recombinant inbred lines, RAPD.


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