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EFFECT OF PLANT PHYSIOLOGY AGE ON INDUCED SYSTEMIC RESISTANCE IN TOMATO AGENT ROOT KNOT NEMATODES BY CHEMICAL INDUCERS | ||
| The Iraqi Journal of Agricultural Science | ||
| Article 1, Volume 46, Issue 2, 2015, Pages 236-245 | ||
| Authors | ||
| Dh. L. E. Al-Sandooq; F. A. Abdul Al-Fattah | ||
| Abstract | ||
| This study was conducted to examin the effect of plant age on induction of resistance by, β-aminobutyric acid (BABA), Acibenzolar-S-methyl (BION), in tomato against root knot nematodes, Meloidogyne spp. by various application methods. The resistance was manifested by reduced root penetration of second stage juveniles (j2) and lowered root knot gall index(gi) of treated plants. BABA treatment at plant age of 2-4 true leaves was significantly superior at the concentration of 40 mM for 4h by less number,76 j2 penetrating roots compared with 549 j2 in the roots of treated control plants. At 6-7 true leaves, 50 mM for one hour significantly outperformed with, 33.3 j2 compared with the 527.7 j2 in control plants. at the age of 2-4 true leaves treated with 40 mM for 4h recorded 5.3gi compared to the control 10 gi. The age of 6-7 true leaves with a concentration of 50 mM for one hour recorded of 2 gi compared with the control which recorded 9 gi. Increased plant resistance to nematodes was more apparent as the concentration of BABA was increased. BION was significantly better in inducing resistance to the nematodes at 50 mgL-1 for 3h when 2-4 true leaves age plants were treated as indicated, 117 j2 penetrated roots compared with 459.2 j2 in control plants. at 6-7 true leaves with 50 mgL-1 for 3h caused significantly less, 62.3 j2 penetrated the roots compared with 551.5 j2 in control. However, no significant difference was observed in the gi for the 2-4 true leaves treatments. the concentration of 50 mgL-1 for 12 h recorded, 6.3 gi compared with gi 10 in the control. At the age of 6-7 true leaves, the concentration of 50 mgL-1 for 3 h significantly increased the gi to 2. 7 compared with 8.5 gi in the control. | ||
| Keywords | ||
| Meloidogyne spp; Induced systemic resistance; BABA; Bion | ||
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