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ROS mediated MAPK signaling in abiotic and biotic stress- striking similarities and differences.

Jalmi SK, Sinha AK - Front Plant Sci (2015)

Bottom Line: ROS activates a similar MAPK in different environmental stimuli, showing different downstream targets with different and specific responses.In animals and yeast, the mechanism behind the specific activation of MAPK by different concentration and species of ROS is elaborated, but in plants this aspect is still unclear.Attempts have been made to review the involvement of ROS in abiotic stress mediated MAPK signaling and how it differentiates with that of biotic stress.

View Article: PubMed Central - PubMed

Affiliation: National Institute of Plant Genome Research New Delhi, India.

ABSTRACT
Plants encounter a number of environmental stresses throughout their life cycles, most of which activate mitogen activated protein kinase (MAPK) pathway. The MAPKs show crosstalks at several points but the activation and the final response is known to be specific for particular stimuli that in-turn activates specific set of downstream targets. Interestingly, reactive oxygen species (ROS) is an important and common messenger produced in various environmental stresses and is known to activate many of the MAPKs. ROS activates a similar MAPK in different environmental stimuli, showing different downstream targets with different and specific responses. In animals and yeast, the mechanism behind the specific activation of MAPK by different concentration and species of ROS is elaborated, but in plants this aspect is still unclear. This review mainly focuses on the aspect of specificity of ROS mediated MAPK activation. Attempts have been made to review the involvement of ROS in abiotic stress mediated MAPK signaling and how it differentiates with that of biotic stress.

No MeSH data available.


Related in: MedlinePlus

Response of MAPK cascades activated by ROS in biotic and abiotic stresses. (A) MEKK1 is a common MAPKKK activated by ROS produced in both biotic and abiotic stress, activates different downstream components of MAPK cascade in Arabidopsis. (B) ROS activated OXI1 mediates two different responses by activating MPK3 and MPK6 in Arabidopsis. (C) ROS generated by biotic and abiotic stress mediates different responses through activation of MKK6 and MPK3/MPK6 in rice. Purple and green color represents biotic and abiotc stress, respectively.
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Figure 2: Response of MAPK cascades activated by ROS in biotic and abiotic stresses. (A) MEKK1 is a common MAPKKK activated by ROS produced in both biotic and abiotic stress, activates different downstream components of MAPK cascade in Arabidopsis. (B) ROS activated OXI1 mediates two different responses by activating MPK3 and MPK6 in Arabidopsis. (C) ROS generated by biotic and abiotic stress mediates different responses through activation of MKK6 and MPK3/MPK6 in rice. Purple and green color represents biotic and abiotc stress, respectively.

Mentions: Mitogen activated protein kinases are important regulators of diverse cellular processes and stress responses. As an important player they show crosstalks at several points in signaling pathways in response to abiotic and biotic stresses that include ROS signaling. It is always noted that a single MAPK cascade is involved in two or more different stress responses. Also an upstream MAPK activated by a response can activate different downstream targets (Andreasson and Ellis, 2010). ROS is a common factor produced in abiotic as well as biotic stress and there are still not enough reports to clear how ROS activated MAPKs behave differently in different stress response (Figure 2). Below are some examples of ROS mediated activation of MAPK signaling cascades in abiotic and other environmental stresses.


ROS mediated MAPK signaling in abiotic and biotic stress- striking similarities and differences.

Jalmi SK, Sinha AK - Front Plant Sci (2015)

Response of MAPK cascades activated by ROS in biotic and abiotic stresses. (A) MEKK1 is a common MAPKKK activated by ROS produced in both biotic and abiotic stress, activates different downstream components of MAPK cascade in Arabidopsis. (B) ROS activated OXI1 mediates two different responses by activating MPK3 and MPK6 in Arabidopsis. (C) ROS generated by biotic and abiotic stress mediates different responses through activation of MKK6 and MPK3/MPK6 in rice. Purple and green color represents biotic and abiotc stress, respectively.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4585162&req=5

Figure 2: Response of MAPK cascades activated by ROS in biotic and abiotic stresses. (A) MEKK1 is a common MAPKKK activated by ROS produced in both biotic and abiotic stress, activates different downstream components of MAPK cascade in Arabidopsis. (B) ROS activated OXI1 mediates two different responses by activating MPK3 and MPK6 in Arabidopsis. (C) ROS generated by biotic and abiotic stress mediates different responses through activation of MKK6 and MPK3/MPK6 in rice. Purple and green color represents biotic and abiotc stress, respectively.
Mentions: Mitogen activated protein kinases are important regulators of diverse cellular processes and stress responses. As an important player they show crosstalks at several points in signaling pathways in response to abiotic and biotic stresses that include ROS signaling. It is always noted that a single MAPK cascade is involved in two or more different stress responses. Also an upstream MAPK activated by a response can activate different downstream targets (Andreasson and Ellis, 2010). ROS is a common factor produced in abiotic as well as biotic stress and there are still not enough reports to clear how ROS activated MAPKs behave differently in different stress response (Figure 2). Below are some examples of ROS mediated activation of MAPK signaling cascades in abiotic and other environmental stresses.

Bottom Line: ROS activates a similar MAPK in different environmental stimuli, showing different downstream targets with different and specific responses.In animals and yeast, the mechanism behind the specific activation of MAPK by different concentration and species of ROS is elaborated, but in plants this aspect is still unclear.Attempts have been made to review the involvement of ROS in abiotic stress mediated MAPK signaling and how it differentiates with that of biotic stress.

View Article: PubMed Central - PubMed

Affiliation: National Institute of Plant Genome Research New Delhi, India.

ABSTRACT
Plants encounter a number of environmental stresses throughout their life cycles, most of which activate mitogen activated protein kinase (MAPK) pathway. The MAPKs show crosstalks at several points but the activation and the final response is known to be specific for particular stimuli that in-turn activates specific set of downstream targets. Interestingly, reactive oxygen species (ROS) is an important and common messenger produced in various environmental stresses and is known to activate many of the MAPKs. ROS activates a similar MAPK in different environmental stimuli, showing different downstream targets with different and specific responses. In animals and yeast, the mechanism behind the specific activation of MAPK by different concentration and species of ROS is elaborated, but in plants this aspect is still unclear. This review mainly focuses on the aspect of specificity of ROS mediated MAPK activation. Attempts have been made to review the involvement of ROS in abiotic stress mediated MAPK signaling and how it differentiates with that of biotic stress.

No MeSH data available.


Related in: MedlinePlus