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Vertical distribution of microbial communities under the canopy of two legume bushes in the Tehuacán Desert, Mexico
Year:
2008
Source of publication :
European Journal of Soil Biology
Authors :
Mayzlish-Gati, Einav
;
.
Volume :
44
Co-Authors:
Rodríguez-Zaragoza, S., Lab. de Microbiología, Unidad de Biología Tecnología y Prototipos, Facultad de Estudios Superiores Iztacala, Ave. los Barrios #1, Los Reyes Iztacala, Tlalnepantla, Estado de Mexico 54090, Mexico
González-Ruíz, T., Lab. de Microbiología, Unidad de Biología Tecnología y Prototipos, Facultad de Estudios Superiores Iztacala, Ave. los Barrios #1, Los Reyes Iztacala, Tlalnepantla, Estado de Mexico 54090, Mexico
González-Lozano, E., Lab. de Microbiología, Unidad de Biología Tecnología y Prototipos, Facultad de Estudios Superiores Iztacala, Ave. los Barrios #1, Los Reyes Iztacala, Tlalnepantla, Estado de Mexico 54090, Mexico
Lozada-Rojas, A., Lab. de Microbiología, Unidad de Biología Tecnología y Prototipos, Facultad de Estudios Superiores Iztacala, Ave. los Barrios #1, Los Reyes Iztacala, Tlalnepantla, Estado de Mexico 54090, Mexico
Mayzlish-Gati, E., The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
Steinberger, Y., The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
Facilitators :
From page:
373
To page:
380
(
Total pages:
8
)
Abstract:
Prosopis laevigata and Parkinsonia praecox are the most abundant perennial shrubs in the Tehuacán Desert, forming 'islands of fertility' that dominate the alluvial terraces. Both species exhibit very similar phenology, with the timing of litter foliage being the only difference between them. P. praecox litter occurs shortly after the rains, while P. laevigata maintains its leaves until the next wet season. As degradable organic matter (OM) is one of the leading factors determining soil biota composition and activity, because of the OM provided by littering, we expected that the vertical distribution of the microbial community in the vicinity of the root zone of P. praecox would be higher in comparison to P. laevigata. One soil sampling was performed; during the rainy season in August, soil samples were collected from a 0-50-cm depth at 10-cm intervals, in the vicinity of the root canopy of four individual plants of each species and the interspaces between them. Soil moisture, organic matter, and counts of bacteria and fungi under shrubs were found to decrease from the upper to deeper layers. Respiratory activity was higher in the deeper layers (p < 0.01) in all three sampling sites. Total bacterial, fungal, and heterotrophic diazotrophs were found to be significantly (p < 0.001) more numerous under shrubs than in the interspace soil. No nitrogen-fixing bacteria were isolated from interplant soils in comparison to the soil samples collected beneath the shrubs. Heterotrophic diazotrophs significantly (p < 0.01) reduced more acetylene under P. praecox (29.0 nmol/g soil) than under P. laevigata (20.1 nmol/g soil). Although the microbial numbers were unaffected by differences in plant phenology, greater nitrogenase activity under P. praecox may influence nitrogen distribution in this arid environment. Due to the fact that only one sampling was undertaken, this study elucidates the differences in the microbial community between the two shrubs, but the dynamics in the above community could not be shown. © 2008 Elsevier Masson SAS. All rights reserved.
Note:
Related Files :
Fertility islands
fungi
Heterotrophic diazotrophs
Parkinsonia praecox
Prosopis
Soil microbial communities
Show More
Related Content
More details
DOI :
10.1016/j.ejsobi.2008.05.003
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
30976
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:58
Scientific Publication
Vertical distribution of microbial communities under the canopy of two legume bushes in the Tehuacán Desert, Mexico
44
Rodríguez-Zaragoza, S., Lab. de Microbiología, Unidad de Biología Tecnología y Prototipos, Facultad de Estudios Superiores Iztacala, Ave. los Barrios #1, Los Reyes Iztacala, Tlalnepantla, Estado de Mexico 54090, Mexico
González-Ruíz, T., Lab. de Microbiología, Unidad de Biología Tecnología y Prototipos, Facultad de Estudios Superiores Iztacala, Ave. los Barrios #1, Los Reyes Iztacala, Tlalnepantla, Estado de Mexico 54090, Mexico
González-Lozano, E., Lab. de Microbiología, Unidad de Biología Tecnología y Prototipos, Facultad de Estudios Superiores Iztacala, Ave. los Barrios #1, Los Reyes Iztacala, Tlalnepantla, Estado de Mexico 54090, Mexico
Lozada-Rojas, A., Lab. de Microbiología, Unidad de Biología Tecnología y Prototipos, Facultad de Estudios Superiores Iztacala, Ave. los Barrios #1, Los Reyes Iztacala, Tlalnepantla, Estado de Mexico 54090, Mexico
Mayzlish-Gati, E., The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
Steinberger, Y., The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
Vertical distribution of microbial communities under the canopy of two legume bushes in the Tehuacán Desert, Mexico
Prosopis laevigata and Parkinsonia praecox are the most abundant perennial shrubs in the Tehuacán Desert, forming 'islands of fertility' that dominate the alluvial terraces. Both species exhibit very similar phenology, with the timing of litter foliage being the only difference between them. P. praecox litter occurs shortly after the rains, while P. laevigata maintains its leaves until the next wet season. As degradable organic matter (OM) is one of the leading factors determining soil biota composition and activity, because of the OM provided by littering, we expected that the vertical distribution of the microbial community in the vicinity of the root zone of P. praecox would be higher in comparison to P. laevigata. One soil sampling was performed; during the rainy season in August, soil samples were collected from a 0-50-cm depth at 10-cm intervals, in the vicinity of the root canopy of four individual plants of each species and the interspaces between them. Soil moisture, organic matter, and counts of bacteria and fungi under shrubs were found to decrease from the upper to deeper layers. Respiratory activity was higher in the deeper layers (p < 0.01) in all three sampling sites. Total bacterial, fungal, and heterotrophic diazotrophs were found to be significantly (p < 0.001) more numerous under shrubs than in the interspace soil. No nitrogen-fixing bacteria were isolated from interplant soils in comparison to the soil samples collected beneath the shrubs. Heterotrophic diazotrophs significantly (p < 0.01) reduced more acetylene under P. praecox (29.0 nmol/g soil) than under P. laevigata (20.1 nmol/g soil). Although the microbial numbers were unaffected by differences in plant phenology, greater nitrogenase activity under P. praecox may influence nitrogen distribution in this arid environment. Due to the fact that only one sampling was undertaken, this study elucidates the differences in the microbial community between the two shrubs, but the dynamics in the above community could not be shown. © 2008 Elsevier Masson SAS. All rights reserved.
Scientific Publication
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