Marilyn O. Quimado

• PhD
• University of the Philippines Los Baños

Two new species of Syzygium (Myrtaceae), S. omissum Mansibang & Fernando and S. parvipomum Fernando & Mansibang from the ultramafic forests of Surigao del Norte, Mindanao Island, Philippines, are formally described. The subgeneric placement of the species is discussed, and an identification key for species of the subgenus Perikion with an axillary...

A review of the Philippine species of Kania Schltr. (Myrtaceae, Kanieae) is presented, including the description of a new species, Kania allochroa Fernando & Peter G.Wilson. Tristania microphylla Quisumb & Merr. (Kania microphylla (Quisumb. & Merr.) Peter G.Wilson) and Photinia urdanetensis Elmer (= Kania urdanetensis (Elmer) Peter G.Wilson) are le...

The rising demand for critical metals presents a major economic opportunity for mineral-rich countries. For a sustainable transition to a low-carbon future, it is essential to minimise impacts of mineral resource development to the environment, ecosystems, and societies of these nations. Although there has been considerable progress in the social a...

We aimed to assess the species richness of the microbial communities in copper mine tailings that have been spontaneously colonised by plants. We characterised the bacterial (16S rRNA, or 16S) and fungal (ITS) sequences from samples taken from a single bench of an undisturbed mature tailings storage facility (TSF1) and samples from a reference site...

To examine the potential applications of hyperaccumulator plants in the Philippines, we reviewed current data on the extent of metal hyperaccumulation in native species and partitioning of metals within the plant tissue. Twenty-eight species had reported tissue concentrations above the hyperaccumulator threshold, 11 species were endemic to the Phil...

p>The native metallophytes species are the optimum choice to restore degraded areas on ultramafic soil. However, a limited restorative floristic survey on the wooded grassland of Mindoro Occidental had been reported. Four 20 m x 20 m plots were established to rapidly assess the plant diversity of a wooded grassland on ultramafic soil in Sta. Cruz,...

Calophyllum soulattri Burm. f. (1768) is an evergreen tree native to Southeast Asia, Australia, and the Solomon Islands. It is known for its medicinal uses and has been utilized in traditional folk medicine. However, genomic resources for this species are still unavailable. In this study, we sequenced and assembled the first complete chloroplast ge...

Conservation priority is essential to minimize biodiversity loss as it ensures that conservation action focuses on the species at the greatest risk of extinction and on the sites that are most important for their protection. The study presents the initial assessment of collected Philippine threatened species during the botanical exploration in sele...

Eucalyptus deglupta x pellita is among the best-performing Eucalyptus in many field trials in the country. Aside from growth performance evaluation, assessing the generational genetic potentials through DNA analysis is crucial as inbreeding is known to occur among Eucalyptus and to ensure that high genetic diversity is maintained for the next selec...

Previous studies on the embryo structure of legumes species had resulted in the division of the Fabaceae family into two great subfamilies based on embryo axis curvature. Research on seed morphology and anatomy adds to the knowledge of taxonomy, evolution and ecology. This study determined the seed developmental anatomy, pod and seed morphology as...

Due to extensive mining activities, strip vegetation and soil contamination with heavy metals have become common. One of the approaches to ecological restoration is phytostabilization, which uses plants to stabilize and reduce the mobility of heavy metals in the soil. In this study, six species of grasses-namely, Alloteropsis semialata (R.Br.) Hitc...

Perez KLDJ, Quimado MO, Maldia MLSJ, Tinio CE, Hernandez JO, Combalicer MS. 2021. Effects of copper on the leaf morpho-anatomy of Rhizophora mucronata: Implications for mangrove ecosystem restoration. Biodiversitas 22: 2058-2065. Mangrove is one of the important yet threatened ecosystems in the Philippines. One of the reported causes of its destruc...

Pterocarpus indicus, commonly known as narra, is one of the native leguminous trees in the Philippines that has occupied wide geographic distribution resulting in variability of its morphological and structural characteristics. In this study, the morphological and leaf anatomical features of four P. indicus variants (smooth narra – SN, short prickl...

The genus Brackenridgea (Ochnaceae) in the Philippines is revised. Recent field surveys have provided new locality records and ecological and morphological data to distinguish the three Philippine taxa; all are recognised at species level. The new combination, Brackenridgea mindanaensis (Merr.) Fernando is made. Two names are lectotypified and a se...

Thunbergia grandiflora Roxb. (Acanthaceae) or “skyflower” is an exotic species that was reported to be aggressively spreading out of control in the tropical and subtropical ecosystems. This study assessed the invasive characteristics of the species by analyzing its growth characteristics on varying shading intensity and soil series, as well as anat...

Metallophytes are group of plants that can thrive on metal-rich substrate. These plants have potential in various green technologies. However, it is a must to first identify plants that can absorb heavy metals and tolerate the high concentration in their tissues. This study assessed the ability of plants thriving in a Cu-Au mined areas to uptake co...

Mount Makiling Forest Reserve is a mature secondary tropical forest. It is a protected and key biodiversity area, with an extremely high biodiversity conservation priority. Within the three-year observation period (mid 2016 to early 2019) varying phenological patterns across mother trees within and among species was observed. This resulted to diffe...

Morpho-anatomical functional traits of native tree species are deemed important in forest restoration. Although much is known about morpho-anatomical traits of many terrestrial plants, such traits in Philippine native trees remain unclear. In this study, the stem and leaf morpho-anatomy of W. candollei S. Vidal was investigated to provide insights...

Statement of the Problem: In the Philippines, industrial tree plantations have the largest share to the country’s current total log production. G. arborea and F. moluccana (= Paraserianthes falcataria) are two commercially important plantation species in the northern and southern regions of the Philippines, respectively. But, often, the quantity an...

Forest restoration uses native species because of their abilities to restore degraded forest ecological integrity to its original state. However, there has been very little information on the use of native species in restoration in the Philippines. One species that has potential in forest restoration is Tectona philippinensis which is a critically...

Tectona philippinensis Benth. & Hook.f. is one of only three species in the genus Tectona (Lamiaceae) restricted to the Asian tropics. It is endemic to Ilin Island and to Batangas Province on Luzon Island, Philippines and is regarded as a critically endangered species. While role of xerophytic characteristics of plants are very important for their...

This study covers the vegetation composition and diversity in two heavy metal sites with distinct climatic and edaphic environments in the Philippines, Zambales, and Surigao del Norte in the northern and southern regions, respectively, Tree density and basal area were higher in Zambales than in Surigao del Norte. Species diversity, however, was hig...

Botanical exploration on ultramafic sites in Palawan, Surigao and Zambales has resulted in the discovery of a new hypernickelophore species (nickel (Ni) concentration >1%) of Phyllanthus (Phyllanthaceae). This paper reports in detail the Ni uptake of populations of P. erythrotrichus in Candelaria, Masinloc and Santa Cruz, Zambales, and confirms the...

A new, nickel-hyperaccumulating species of Rinorea (Violaceae), Rinorea niccolifera Fernando, from Luzon Island, Philippines, is described and illustrated. This species is most similar to the widespread Rinorea bengalensis by its fasciculate inflorescences and smooth subglobose fruits with 3 seeds, but it differs by its glabrous ovary with shorter...

A new, nickel-hyperaccumulating species of Rinorea (Violaceae), Rinorea niccolifera Fernando, from Luzon Island, Philippines, is described and illustrated. This species is most similar to the widespread Rinorea bengalensis by its fasciculate inflorescences and smooth subglobose fruits with 3 seeds, but it differs by its glabrous ovary with shorter...

Uptake of nickel and three other heavy metals (copper, cobalt, and chromium) was examined in 33 species of the common and rare native vascular plants growing in an ultramafic area currently subjected to mining in Zambales Province, Luzon, Philippines. Leaf tissue samples were initially screened in the field using filter paper impregnated with dimet...

DNA methylation was analyzed in Acacia mangium Willd. buds collected from in vitro and field growing shoots from the same clone and its juvenile offspring. Shoot tips from in vitro microshoots showed higher levels of DNA methylation for juvenile (23.4%) than for mature (21.8%) plant material, irrespective of their morphology. Likewise, under the sa...

Histological examinations of cotyledon- and leaf-derived callus cultures of mungbean (Vigna radiata {L.} Wilczek), pole sitao (V. unguiculata {L.} Walp. var. sesquipedalis {L.} Koern., and mothbean (V. aconitifolia Jacq. Marechal) initiated using MS-B5 medium with three different auxins were done to determine the origin and development of embryogen...