Plant Pathol J > Volume 26(4); 2010 > Article
The Plant Pathology Journal 2010;26(4):402-408.
DOI: https://doi.org/10.5423/PPJ.2010.26.4.402    Published online December 31, 2010.
NMMP1, a Matrix Metalloprotease in Nicotiana benthamiana Has a Role in Protection against Bacterial Infection
So Ra Kang, Sang Keun Oh, Jong Joo Kim, Do Il Choi, Kwang Hyun Baek
Abstract
Plant matrix metalloproteases (MMPs) are a family of apoplastic metalloproteases closely related to human matrilysins. Up-regulation of Nicotiana benthamiana matrix metalloprotease 1 (NMMP1) expression by treatment with pathogens, ethephon and aging indicates that the gene is related to plant defense and the aging process through ethylene signaling. NMMP1 expression was higher than in normal growth leaves following infection with an incompatible pathogen Pseudomonas syringae pv. tomato T1 or a compatible pathogen P. syringae pv. tabaci and in aged leaves. Transient overexpression of NMMP1 in N. benthamiana leaves lowered the growth of P. syringae pv. tabaci. However, NMMP1-silenced leaves showed increased growth of P. syringae pv. tabaci. These data strongly suggest that NMMP1 in N. benthamiana is a defense related gene, which is positively regulated by ethylene.
Key Words: Defense, matrix metalloprotease, overexpression, pathogen, virus-induced gene silencing, VIGS
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