Vol. 103, No. 2 (Jun 2020)
The mangrove forest along the Sabang River in Puerto Princesa, Palawan, Philippines is composed of 47.55 ha of century-old mangrove trees that have served as a habitat to its diverse flora and fauna. It has been a breeding site to different species of plants, fish, mammals, reptiles, birds, and other endangered wildlife. The mangroves are part of the Puerto Princesa Subterranean River National Park (PPSRNP) which has been declared as a Protected Area (PA) by the International Union for the Conservation of Nature (IUCN). It is considered one of the most important biodiversity conservation areas in the Philippines. As part of the local efforts to preserve the pristine condition of this ecosystem, mangrove seedlings have been grown approximately 150 meters from the beach, which will later on be transplanted into the deeper mangrove forest.
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Articles
Cryopreservation of ‛Laguna Tall’ Coconut (Cocos nucifera Linn.) Mature Zygotic Embryos
J. Kumaunang, O. P. Damasco and C. M. Protacio
‘Laguna Tall’ coconut (Cocos nucifera L.) zygotic embryos were successfully cryopreserved through cryoprotection using pretreatment-desiccation or vitrification, rapid freezing in liquid nitrogen, rapid thawing at 40°C for 2 min, and recovery and growth of frozen embryos in coconut germination medium. Pretreatment in 0.5 M sucrose for 1 d followed by 24 h desiccation in silica gel gave the highest recovery and complete germination (47%) of cryopreserved embryos. This was followed by 24 h desiccation alone (43%), 3 d sucrose pretreatment + 24 h desiccation (33%), and the least recovery from vitrification using PVS4 solution (13%). Embryo reinvigoration as a post thawing treatment and addit...
‘Laguna Tall’ coconut (Cocos nucifera L.) zygotic embryos were successfully cryopreserved through cryoprotection using pretreatment-desiccation or vitrification, rapid freezing in liquid nitrogen, rapid thawing at 40°C for 2 min, and recovery and growth of frozen embryos in coconut germination medium. Pretreatment in 0.5 M sucrose for 1 d followed by 24 h desiccation in silica gel gave the highest recovery and complete germination (47%) of cryopreserved embryos. This was followed by 24 h desi...
Vegetative Growth and Nutrient Use Efficiency of Tissue-Cultured ‛Saba’ Banana (Musa) Plantlets in Response to Fertigroe® N, P, and K Nanofertilizers
Domingo E. Angeles, Job Jonas C. Ruzgal, Graciela L. Caballero and Alvin P. Crodua
The study determined the effect of using FertiGroe® Nano N (18-0-0), Nano P (0-18-0), and Nano K (0-0-38) nanofertilizers on the growth and nutrient use efficiency of tissue-cultured ‛Saba’ banana (Musa ABB) plantlets. For 7 wk, conventional fertilizers (CF) and FertiGroe® nanofertilizers (NF) were applied to the plantlets at graduated level of the recommended rate (RR). Vegetative growth was monitored weekly. At the end of the experiment, samples were collected for dry matter partitioning and leaf tissue analysis. Fertilizer treatment significantly improved pseudostem growth and dry matter production of ‛Saba’ banana plantlets. Plantlets applied with neither conventional fertilizer (CF) ...
The study determined the effect of using FertiGroe® Nano N (18-0-0), Nano P (0-18-0), and Nano K (0-0-38) nanofertilizers on the growth and nutrient use efficiency of tissue-cultured ‛Saba’ banana (Musa ABB) plantlets. For 7 wk, conventional fertilizers (CF) and FertiGroe® nanofertilizers (NF) were applied to the plantlets at graduated level of the recommended rate (RR). Vegetative growth was monitored weekly. At the end of the experiment, samples were collected for dry matter partitioning an...
Phenotypic Characterization of Selected Traits in ‛Saba’ Banana (Musa balbisiana), Chico (Manilkara zapota) and Pummelo (Citrus maxima) for Crop Improvement
Pablito M. Magdalita and Alangelico O. San Pascual
Phenotypic characteristics of ‛Saba’ banana, chico and pummelo were assessed for variability, clustering patterns and character association of 67 saba clones, 71 chico and 73 pummelo genotypes collected mainly from Luzon. Characters were analyzed for agglomerative clustering and correlation analyses. Five clusters for saba, chico and pummelo genotypes were arbitrarily formed a highly branched dendrogram for each species was generated. In ‛Saba’, 22 grouped in Clusters 1, 24, 18, 1 and 2 in Clusters II, III, IV and V, respectively. In chico, 67 genotypes clustered in Cluster I, while 1 each belongs to Clusters II, III, IV and V. In pummelo, 37, 4, 29, 2 and 1 genotypes grouped, respectivel...
Phenotypic characteristics of ‛Saba’ banana, chico and pummelo were assessed for variability, clustering patterns and character association of 67 saba clones, 71 chico and 73 pummelo genotypes collected mainly from Luzon. Characters were analyzed for agglomerative clustering and correlation analyses. Five clusters for saba, chico and pummelo genotypes were arbitrarily formed a highly branched dendrogram for each species was generated. In ‛Saba’, 22 grouped in Clusters 1, 24, 18, 1 and 2 in Cl...
Total Flavonoid, Total Phenolic Content and Antioxidant Activity of Erechtites valerianifolia Herb Extracts
A. R. Puspaningtyas, E. N. Sholikhah, P. Astuti and S. Riyanto
Erechtites valerianifolia (Link ex Wolf.) Less. ex DC. or "Jonggolan" (Indonesian name), a member of the family Asteraceae, was collected from Meru Betiri Forest, Indonesia. This study investigated the antioxidant activity of E. valerianifolia and its total phenolic and total flavonoid content. Methanol, ethyl acetate, dichloromethane, and hexane extracts of E. valerianifolia herbs were tested using 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radicals scavenging assay. Antioxidant activity was expressed in IC50 values of the n-hexane, dichlormethane, ethyl acetate and methanol extracts (367.8000 ppm, 139.5200 ppm, 911.0540 ppm, and 401.9530 ppm, respectively) with the best antioxidant activ...
Erechtites valerianifolia (Link ex Wolf.) Less. ex DC. or "Jonggolan" (Indonesian name), a member of the family Asteraceae, was collected from Meru Betiri Forest, Indonesia. This study investigated the antioxidant activity of E. valerianifolia and its total phenolic and total flavonoid content. Methanol, ethyl acetate, dichloromethane, and hexane extracts of E. valerianifolia herbs were tested using 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radicals scavenging assay. Antioxidant activity was ...
Consumer Purchasing Behavior for Fresh Soursop (Annona muricata L.): Evidence from Metro Manila and CALABARZON, Philippines
Dormita R. Del Carmen, Elda B. Esguerra and Arjay A. Gerance
A survey of urban and peri-urban consumers in major market centers and residential estates in Metro Manila and CALABARZON in the Philippines was conducted to determine their purchasing behavior for fresh soursop as influenced by demographic characteristics and preferences. Household income, education and household size were strongly correlated with consumer preference on soursop attributes. As household income increased, consumers tended to look for more desirable attributes which can be classified into search (size, color, peel thickness) and experience (taste, juiciness and pulp texture). Education had a similar influence but to a lesser extent. Consumer household size and fruit size al...
A survey of urban and peri-urban consumers in major market centers and residential estates in Metro Manila and CALABARZON in the Philippines was conducted to determine their purchasing behavior for fresh soursop as influenced by demographic characteristics and preferences. Household income, education and household size were strongly correlated with consumer preference on soursop attributes. As household income increased, consumers tended to look for more desirable attributes which can be clas...
