Florinia E. Merca

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Two strains of Chlorella vulgaris Beijerinck isolated from two different sites in Laguna de Bay, Philippines, were studied for their resistance and ability to remove four metal ions, i.e., Cu2+, Cr6+, Pb2+, and Cd2+ added separately in BG-11 growth medium. The growth of the two strains was severely inhibited at 2 mg.L−1 of Cu2+, 5 mg.L−1 of Cr6+, 8 mg.L−1(More)
BACKGROUND AND AIMS In recent years, Cyperus rotundus has become a problem weed in lowland rice (Oryza sativa) grown in rotation with vegetables in the Philippines. As the growth of C. rotundus is commonly suppressed by prolonged flooding, the ability of the weed to grow vigorously in flooded as well as upland conditions suggests that adapted ecotypes occur(More)
Crop productivity is largely affected by abiotic factors such as flooding and by biotic factors such as weeds. Although flooding after direct seeding of rice helps suppress weeds, it also can adversely affects germination and growth of rice, resulting in poor crop establishment. Barnyard grasses (Echinochloa spp.) are among the most widespread weeds(More)
BACKGROUND AND AIMS Purple nutsedge (Cyperus rotundus L.) is a major weed of upland crops and vegetables. Recently, a flood-tolerant ecotype evolved as a serious weed in lowland rice. This study attempted to establish the putative growth and physiological features that led to this shift in adaptation. METHODOLOGY Tubers of upland C. rotundus (ULCR) and(More)
The broad application and variety of uses of lectins show the need to isolate lectins from local and cheap sources since lectins are very expensive. One of the possible local sources of lectin is the seed of horseradish or malunggay (Moringa pterygosperma syn. Moringa oleifera). In this study, lectin was extracted from mature horseradish seeds with(More)
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