Question
Asked 14 May 2017
Ritesh Ghosh
Ritesh Ghosh

Antioxidant enzyme activity and plant immunity

Normally, elevated ROS protects plants from microbial pathogens through HR response. I observed increased antioxidant enzyme activity (SOD, CAT, APX) in Arabidopsis plants which are resistant to a necrotrophic fungal pathogen. Is there any evidence where the elevated activity of antioxidant enzymes confers resistance against microbial pathogens? Many thanks in advance.
necrotrophs
Biotic Stress

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Laith Al-Ani
University of Science Malaysia
77
You ara welcome
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All Answers (24)

Mafatlal M. Kher
Ariel University
Several reactive oxygen species (ROS) are continuously produced in plants as byproducts of aerobic metabolism. Depending on the nature of the ROS species, some are highly toxic and rapidly detoxified by various cellular enzymatic and nonenzymatic mechanisms. 
Yes, elevated activity of antioxidant enzymes confers against the microbial pathogen. I suggest please check other parameters like ascorbate and glutathione , as well as tocopherol, flavonoids, alkaloids, and carotenoids and proline. 
Some supporting literature
http://www.annualreviews.org/doi/full/10.1146/annurev.arplant.55.031903.141701?url_ver=Z39.88-2003&rfr_id=ori%3Arid%3Acrossref.org&rfr_dat=cr_pub%3Dpubmed&
http://www.cell.com/trends/plant-science/fulltext/S1360-1385(04)00204-3?_returnURL=http%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS1360138504002043%3Fshowall%3Dtrue
http://www.cell.com/trends/plant-science/fulltext/S1360-1385(11)00055-0?_returnURL=http%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS1360138511000550%3Fshowall%3Dtrue
http://www.cell.com/trends/plant-science/fulltext/S1360-1385(02)02312-9?_returnURL=http%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS1360138502023129%3Fshowall%3Dtrue 
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Millton Lima Neto
São Paulo State University
ROS can act as messengers to abiotic stress responses in plants. You can easily finde good reviews regarding this issue
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Laith Al-Ani
University of Science Malaysia
Hi Ritesh
You can find several references on attachment 1
https://ucanr.edu/datastoreFiles/234-2263.pdf
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Laith Al-Ani
University of Science Malaysia
2
https://link.springer.com/article/10.1007/s10535-005-0048-z
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Laith Al-Ani
University of Science Malaysia
3
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0165454
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Laith Al-Ani
University of Science Malaysia
4
https://www.hindawi.com/journals/bmri/2016/9851095/
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Laith Al-Ani
University of Science Malaysia
5
https://www.mdpi.com/1422-0067/14/12/24008/pdf
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Laith Al-Ani
University of Science Malaysia
6
https://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202011000300002
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Laith Al-Ani
University of Science Malaysia
7
https://journal.ashspublications.org/content/136/4/247.full
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Laith Al-Ani
University of Science Malaysia
8
https://journal.ashspublications.org/content/137/2/80.full
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Laith Al-Ani
University of Science Malaysia
9
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3571416/
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Laith Al-Ani
University of Science Malaysia
10
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5082799/
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Laith Al-Ani
University of Science Malaysia
11
https://books.google.com/books?isbn=9400756283
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Laith Al-Ani
University of Science Malaysia
12
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4807390/
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Laith Al-Ani
University of Science Malaysia
13
https://www.tandfonline.com/doi/full/10.1080/03235408.2016.1180924?src=recsys
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Laith Al-Ani
University of Science Malaysia
14
https://books.google.com/books?isbn=9811003882
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Laith Al-Ani
University of Science Malaysia
15
https://www.sciencedirect.com/science/article/pii/S0005272812000734
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Laith Al-Ani
University of Science Malaysia
16
https://www.ias.csic.es/janc/sci_papers/physiolmolecplantpathol_61_325_02.pdf
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Laith Al-Ani
University of Science Malaysia
17
https://www.jipb.net/tupian/2008/1/3/152606.pdf
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Laith Al-Ani
University of Science Malaysia
18
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=17&cad=rja&uact=8&ved=0ahUKEwjEo9y3ppHUAhXI6RQKHZ06AEQ4ChAWCEAwBg&url=http%3A%2F%2Fmic.microbiologyresearch.org%2Fcontent%2Fjournal%2Fmicro%2F10.1099%2Fmic.0.019869-0%3Fcrawler%3Dtrue%26mimetype%3Dapplication%2Fpdf&usg=AFQjCNE3HkpNhhHDDMYec9csJUl0tcTqGg&sig2=ONU0xntbQ3tTDPOtOqyK7w
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Laith Al-Ani
University of Science Malaysia
19
https://academic.oup.com/jxb/article-pdf/56/422/3223/2246779/eri319.pdf
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Laith Al-Ani
University of Science Malaysia
20
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Ritesh Ghosh
Imperial College London
Thanks a lot 
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Laith Al-Ani
University of Science Malaysia
77
You ara welcome
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