TY - JOUR
T1 - Influence of phylloplane colonizing biocontrol agents on the black spot of rose caused by Diplocarpon rosae
AU - Karthikeyan, Muthusamy
AU - Bhaskaran, Ramanujam
AU - Mathiyazhagan, Subramanian
AU - Velazhahan, Rethinasamy
PY - 2007/12
Y1 - 2007/12
N2 - An attempt was made to study the biocontrol efficacy of antagonistic microorganisms in phylloplane of rose cv. Edward to manage the black spot (Diplocarpon rosae) disease. Eight antagonistic microorganisms were tested in vivo against the black spot pathogen. Among these, Trichoderma viride and Pseudomonas fluorescens pf1 reduces the mycelial growth significantly. These two biocontrol agents were evaluated for their ability to induce defense-related enzymes and chemicals in plants. Increased activity of phenylalanine ammonia lyase (PAL), peroxidase (PO), polyphenoloxidase (PPO) and total phenolics were recorded in all the biocontrol agents treated leaves. P. fluorescens Pf1 recorded early and increased synthesis of the entire defense-related enzymes and total phenol within 6 days. The application of biocontrol agents induced the defense-related enzymes involved in phenyl propanoid pathway in addition to direct antagonism, which collectively contribute for enhanced resistance against invasion of Diplocarpon rosae in rose.
AB - An attempt was made to study the biocontrol efficacy of antagonistic microorganisms in phylloplane of rose cv. Edward to manage the black spot (Diplocarpon rosae) disease. Eight antagonistic microorganisms were tested in vivo against the black spot pathogen. Among these, Trichoderma viride and Pseudomonas fluorescens pf1 reduces the mycelial growth significantly. These two biocontrol agents were evaluated for their ability to induce defense-related enzymes and chemicals in plants. Increased activity of phenylalanine ammonia lyase (PAL), peroxidase (PO), polyphenoloxidase (PPO) and total phenolics were recorded in all the biocontrol agents treated leaves. P. fluorescens Pf1 recorded early and increased synthesis of the entire defense-related enzymes and total phenol within 6 days. The application of biocontrol agents induced the defense-related enzymes involved in phenyl propanoid pathway in addition to direct antagonism, which collectively contribute for enhanced resistance against invasion of Diplocarpon rosae in rose.
KW - Biocontrol
KW - Black spot
KW - Phylloplane
KW - Rose
UR - http://www.scopus.com/inward/record.url?scp=35948964797&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=35948964797&partnerID=8YFLogxK
U2 - 10.1080/17429140701701071
DO - 10.1080/17429140701701071
M3 - Article
AN - SCOPUS:35948964797
SN - 1742-9145
VL - 2
SP - 225
EP - 231
JO - Journal of Plant Interactions
JF - Journal of Plant Interactions
IS - 4
ER -