Volume 31 No. 1 January – June 2009

Florence Lasalita-Zapico1 and Violeta N. Villegas2 ABSTRACT Morphological analysis was undertaken to assess the degree of genetic relatedness and to characterize selected papaya (Carica papaya L.) inbreds and hybrids. Transmission of phenotypic traits from inbred parents to hybrid progeny followed the Mendelian pattern (complete dominance). The clustering mechanism separated the papaya genotypes into two groups. …

Morphological characterization of selected papaya (Carica papaya L.) inbreds and hybrids Read More »

Ian A. Navarrete1,2, Salfe O. Macalde1 and Victor B. Asio1 ABSTRACT The influence of aggregates and rhizosphere on nutrient availability of degraded tropical soils is not yet well understood. The study evaluated differences in the nutrient characteristics between rhizosphere and non-rhizosphere soils, aggregated and homogenized soil samples, and inner and outer portions of aggregates. Soil …

Nutrient characteristics of aggregates and rhizosphere of a degraded upland soil: Implication for soil fertility evaluation Read More »

Ivy M. Modina1, Candelario L. Calibo2 and Lucia M. Borines3 ABSTRACT Chitosan has been reported to have antimicrobial property to some pathogen species as well as an elicitor of resistance in plants, particularly Systemic Acquired Resistance (SAR). A bioassay of chitosan against Xanthomonas oryzae pv oryzae (Xoo) was conducted to determine its antimicrobial property against …

Antimicrobial property of chitosan and induction of systemic acquired resistance for the control of rice bacterial blight caused by Xanthomonas oryzae pv. oryzae (Swings et al.) Read More »

Suparna Mandal Biswas1, Nasrin Begam1, Sunanda Chanda1 and Lalit Kumar2 ABSTRACT Potent biopesticides with strong antimicrobial activity as well growth inhibitory activity has been isolated and purified from the Ethyl Acetate Fraction (TrEAF) of tamarind leaves. Chromatographic analyses (TLC, UV, MS, NMR, and IR) indicated the presence of putative caffeic acid derivative in Tamarind leaves. …

Allelochemicals from the leaves of Tamarindus indica L. Read More »

Dewoowoogen P. Baclayon1 and Toshiyuki Matsui2 ABSTRACT Quality deterioration in broccoli is associated with rapid loss of sucrose after harvest. Hence, this study was conducted to investigate the influence of exogenous application of 10% (w/v) sucrose to broccoli heads during storage at 20⁰C on the activity and gene expression of sucrose synthase. The level of …

Carbohydrate status of sucrose-fed broccoli head during storage and the activity and gene expression of sucrose synthase Read More »

Teodoro C. Mendoza ABSTRACT Producing liquid biofuel for cars to address the declining oil supply requires the same resources or inputs (land, water, initial energy or oil, fertilizer and machineries) as in producing food for humans. As early as the 1980’s, all the prime lands in the world are already used for agri-and-aquaculture (1970s for …

Food security implications of biofuel production Read More »