3 research outputs found
Medicago truncatula and Glycine max: Different Drought Tolerance and Similar Local Response of the Root Nodule Proteome
Legume crops present important agronomical
and environmental advantages
mainly due to their capacity to reduce atmospheric N<sub>2</sub> to
ammonium via symbiotic nitrogen fixation (SNF). This process is very
sensitive to abiotic stresses such as drought, but the mechanism underlying
this response is not fully understood. The goal of the current work
is to compare the drought response of two legumes with high economic
impact and research importance, Medicago truncatula and Glycine max, by characterizing
their root nodule proteomes. Our results show that, although M. truncatula exhibits lower water potential values
under drought conditions compared to G. max, SNF declined analogously in the two legumes. Both of their nodule
proteomes are very similar, and comparable down-regulation responses
in the diverse protein functional groups were identified (mainly proteins
related to the metabolism of carbon, nitrogen, and sulfur). We suggest
lipoxygenases and protein turnover as newly recognized players in
SNF regulation. Partial drought conditions applied to a split-root
system resulted in the local down-regulation of the entire proteome
of drought-stressed nodules in both legumes. The high degree of similarity
between both legume proteomes suggests that the vast amount of research
conducted on M. truncatula could be
applied to economically important legume crops, such as soybean
Medicago truncatula and Glycine max: Different Drought Tolerance and Similar Local Response of the Root Nodule Proteome
Legume crops present important agronomical
and environmental advantages
mainly due to their capacity to reduce atmospheric N<sub>2</sub> to
ammonium via symbiotic nitrogen fixation (SNF). This process is very
sensitive to abiotic stresses such as drought, but the mechanism underlying
this response is not fully understood. The goal of the current work
is to compare the drought response of two legumes with high economic
impact and research importance, Medicago truncatula and Glycine max, by characterizing
their root nodule proteomes. Our results show that, although M. truncatula exhibits lower water potential values
under drought conditions compared to G. max, SNF declined analogously in the two legumes. Both of their nodule
proteomes are very similar, and comparable down-regulation responses
in the diverse protein functional groups were identified (mainly proteins
related to the metabolism of carbon, nitrogen, and sulfur). We suggest
lipoxygenases and protein turnover as newly recognized players in
SNF regulation. Partial drought conditions applied to a split-root
system resulted in the local down-regulation of the entire proteome
of drought-stressed nodules in both legumes. The high degree of similarity
between both legume proteomes suggests that the vast amount of research
conducted on M. truncatula could be
applied to economically important legume crops, such as soybean
Medicago truncatula and Glycine max: Different Drought Tolerance and Similar Local Response of the Root Nodule Proteome
Legume crops present important agronomical
and environmental advantages
mainly due to their capacity to reduce atmospheric N<sub>2</sub> to
ammonium via symbiotic nitrogen fixation (SNF). This process is very
sensitive to abiotic stresses such as drought, but the mechanism underlying
this response is not fully understood. The goal of the current work
is to compare the drought response of two legumes with high economic
impact and research importance, Medicago truncatula and Glycine max, by characterizing
their root nodule proteomes. Our results show that, although M. truncatula exhibits lower water potential values
under drought conditions compared to G. max, SNF declined analogously in the two legumes. Both of their nodule
proteomes are very similar, and comparable down-regulation responses
in the diverse protein functional groups were identified (mainly proteins
related to the metabolism of carbon, nitrogen, and sulfur). We suggest
lipoxygenases and protein turnover as newly recognized players in
SNF regulation. Partial drought conditions applied to a split-root
system resulted in the local down-regulation of the entire proteome
of drought-stressed nodules in both legumes. The high degree of similarity
between both legume proteomes suggests that the vast amount of research
conducted on M. truncatula could be
applied to economically important legume crops, such as soybean