This unique study
evaluates the effects of Ralstoniasolanacearum (Rs) induced biotic stress in
two cultivars, Zingiberofficinale (ginger) and Lycopersiconesculentum (tomato). They were grown in pots and hydroponic systems
with controls; to induce biotic stress, about 8×104 colony forming units of Rs suspension was injected into the healthy test plants.
Upon induction of Rs stress, highly significant (p<0.01) biochemical changes (%) were noticed
in respect to controls: carbohydrate content was generally high in both plants;
while they showed decreased starch and protein contents; phenolics showed a swing
of decrease or increase between pot and hydroponic systems; and all plants in general
showed higher (3-6 fold) proline content upon induction of biotic stress.
Regarding oxidative stress isozymes (OSE), superoxide dismutase (EC22.214.171.124) isozymes were normally 3, but treated hydroponics had
4 with comparable relative mobility values; peroxidase (EC126.96.36.199) isozymes
were generally 2, except for treated hydroponic tomato. Briefly, Rs induced biotic
stress caused wilt symptoms in ginger, but did not affect tomato though its
biochemical and OSE patterns especially in those grown as hydroponics were elicited
to significantly higher levels.
Cite this paper
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