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Review
. 2013:2013:948258.
doi: 10.1155/2013/948258. Epub 2013 Nov 11.

Use of Frankia and actinorhizal plants for degraded lands reclamation

Nathalie Diagne  1 , Karthikeyan Arumugam  2 , Mariama Ngom  3 , Mathish Nambiar-Veetil  2 , Claudine Franche  4 , Krishna Kumar Narayanan  2 , Laurent Laplaze  5
Affiliations
Review

Use of Frankia and actinorhizal plants for degraded lands reclamation

Nathalie Diagne et al. Biomed Res Int. 2013.

Abstract

Degraded lands are defined by soils that have lost primary productivity due to abiotic or biotic stresses. Among the abiotic stresses, drought, salinity, and heavy metals are the main threats in tropical areas. These stresses affect plant growth and reduce their productivity. Nitrogen-fixing plants such as actinorhizal species that are able to grow in poor and disturbed soils are widely planted for the reclamation of such degraded lands. It has been reported that association of soil microbes especially the nitrogen-fixing bacteria Frankia with these actinorhizal plants can mitigate the adverse effects of abiotic and biotic stresses. Inoculation of actinorhizal plants with Frankia significantly improves plant growth, biomass, shoot and root N content, and survival rate after transplanting in fields. However, the success of establishment of actinorhizal plantation in degraded sites depends upon the choice of effective strains of Frankia. Studies related to the beneficial role of Frankia on the establishment of actinorhizal plants in degraded soils are scarce. In this review, we describe some examples of the use of Frankia inoculation to improve actinorhizal plant performances in harsh conditions for reclamation of degraded lands.

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Figures

Figure 1
Figure 1
Structures of Frankia bacteria H: hyphae, V: vesicle, and S: sporangia.
Figure 2
Figure 2
(a) Casuarina equisetifolia plantation in Niayes region for fixation of dunes, Senegal; (b) C. equisetifolia plantation in Magnesite mined out lands, India.
Figure 3
Figure 3
C. equisetifolia plantation in Mboro: (a) old trees are replaced by young seedlings; (b) and (c) uses of C. equisetifolia wood as firewood (b) or timber (c).
See this image and copyright information in PMC

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