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|Title: ||Mesorhizobium ciceri LMS-1 expressing an exogenous 1-aminocyclopropane-1-carboxylate (ACC) deaminase increases its nodulation abilities and chickpea plant resistance to soil constraints|
|Authors: ||Nascimento, Francisco|
|Keywords: ||1-aminocyclopropane-1-carboxylate deaminase|
|Issue Date: ||2012|
|Publisher: ||The Society for Applied Microbiology|
|Citation: ||Nascimento, F.,Brigido, C., Glick, B., Oliveira, S., Alho, L. (2012) Mesorhizobium ciceri LMS-1 expressing an exogenous
1-aminocyclopropane-1-carboxylate (ACC) deaminase
increases its nodulation abilities and chickpea plant
resistance to soil constraints. Letters in Applied Microbiology 55, 15–21.|
|Abstract: ||Aims: Our goal was to understand the symbiotic behaviour of a Mesorhizobium
strain expressing an exogenous 1-aminocyclopropane-1-carboxylate (ACC)
deaminase, which was used as an inoculant of chickpea (Cicer arietinum) plants
growing in soil.
Methods and Results: Mesorhizobium ciceri LMS-1 (pRKACC) was tested for
its plant growth promotion abilities on two chickpea cultivars (ELMO and
CHK3226) growing in nonsterilized soil that displayed biotic and abiotic constraints
to plant growth. When compared to its wild-type form, the M. ciceri
LMS-1 (pRKACC) strain showed an increased nodulation performance of c.
125 and 180% and increased nodule weight of c. 45 and 147% in chickpea cultivars
ELMO and CHK3226, respectively. Mesorhizobium ciceri LMS-1
(pRKACC) was also able to augment the total biomass of both chickpea plant
cultivars by c. 45% and to reduce chickpea root rot disease susceptibility.
Conclusions: The results obtained indicate that the production of ACC deaminase
under free living conditions by Mesorhizobium strains increases the nodulation,
plant growth abilities and biocontrol potential of these strains.
Significance and Impact of the Study: This is the first study regarding the use
of a transformed rhizobial strain expressing an exogenous ACC deaminase in
different plant cultivars growing in soil. Hence, obtaining Mesorhizobium
strains with high ACC deaminase activity is a matter of extreme importance
for the development of inoculants for field applications.|
|Appears in Collections:||MED - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica|
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