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ASSESSMENT AND TOLERANCE OF MILLET PLANT SEEDLINGS UNDER PROLONGED WATERLOGGING FOLLOWING EXOGENOUS EXPOSURE TO ETHYLENE.

₦ 3,000.00
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ABSTRACT

 

Waterlogging is detrimental to plants primarily due to restricted gas exchange underwater, which leads to an energy and carbohydrate deficit thereby drastically reducing the growth and survival of terrestrial plants. The study investigated the growth of Pennisetum glaucum (Maiwa and Gero millet) and Eleusine coracona (Tamba millet) in prolonged waterlogging condition. The survival of the plants when exposed to exogenous ethylene before and after waterlogging was evaluated as the main objective. Completely randomised block design was the experimental layout with four treatments and six replicates in ethylene treated plants while both the positive and negative control were four replicates each. Parameters analysed were morphological appearance where positive control plants were significantly higher than test plants(p<0.05), anatomical features of root cross section where enhanced aerenchyma cells were seen and microbial and physico-chemical analysis of the soil. After five weeks of waterlogging, the morphological changes recorded in test plants were chlorotic leaves, wilting and death. After termination of waterlogging maiwa and gero were able to show some recoverability by initiating spike formation while tamba could not recover from the flooding stress.