A5009554767- Botany and Geology in Latin America and Caribbean
- Botany, Ecology, and Taxonomy Studies
- Plant Diversity and Evolution
- Invertebrate Taxonomy and Ecology
- Plant and Fungal Species Descriptions
- Scarabaeidae Beetle Taxonomy and Biogeography
- Fern and Epiphyte Biology
- Research on scale insects
- Plant Pathogens and Fungal Diseases
- Plant and animal studies
- Plant and soil sciences
- Species Distribution and Climate Change
- Environmental and Cultural Studies in Latin America and Beyond
- Cocoa and Sweet Potato Agronomy
- Ginger and Zingiberaceae research
- Agriculture and Farm Safety
- Ethnobotanical and Medicinal Plants Studies
- Plant responses to elevated CO2
- Ecology and Vegetation Dynamics Studies
- Chromosomal and Genetic Variations
- Plant Physiology and Cultivation Studies
- Lepidoptera: Biology and Taxonomy
- Biological Control of Invasive Species
- Genetic diversity and population structure
- Greenhouse Technology and Climate Control
International Union for Conservation of Nature
2025
Chonburi Hospital
2015-2024
Thongsook College
2021
National Tropical Botanical Garden
2004-2017
University of Guam
2009-2012
New York Botanical Garden
2010
Fairchild Tropical Botanic Garden
2009-2010
Cycads represent one of the most ancient lineages living seed plants. Identifying genomic features uniquely shared by cycads and other extant plants, but not non-seed-producing may shed light on origin key innovations, as well early diversification Here, we report 10.5-Gb reference genome Cycas panzhihuaensis, complemented transcriptomes 339 cycad species. Nuclear plastid phylogenomic analyses strongly suggest that Ginkgo form a clade sister to all gymnosperms, in contrast mitochondrial...
Abstract The islands of the Ryukyu archipelago in Japan are biologically diverse, supporting numerous plant and animal taxa found nowhere else. One most iconic plants is Cycas revoluta Thunb., only cycad native to Japan. At this moment, community researchers concerned about impacts caused by recent invasion aulacaspis scale ( Aulacaspis yasumatsui Takagi) into wild populations C. Amami‐Oshima Okinawa‐jima. Within last three decades, cycad‐specific has been inadvertently transported outside...
ABSTRACT The evolution of the latitudinal diversity gradient (LDG), characterized by a peak in toward tropics, has captured significant attention evolutionary biology and ecology. However, inverse LDG (i‐LDG) mechanism, wherein species richness increases poles, remains inadequately explored. Cycads are among one oldest lineages extant seed plants have undergone extensive diversification tropics. Intriguingly, cycad abundance exhibits an i‐LDG pattern, underlying causes for this phenomenon...
The literature covering the biology, invasion chronology, host plant responses, and control efforts of armored scale Aulacaspis yasumatsui Takagi (Hempitera: Diaspididae) is reviewed. small size this cycad pest complex surface morphology organs combine to make visual detection every cryptic infestation difficult or impossible achieve. international movement Cycas revoluta Thunb. nursery plants presence C. industries in so many countries have enabled wreak havoc on horticulture trade over...
Ocean currents play a significant role in driving the long-distance dispersal (LDD), spatial distribution and phylogeographic patterns of many organisms. Integrating analyses mechanistic ocean current modelling can provide novel insights into evolutionary history terrestrial littoral species but has been rarely applied this context. We focused on group Cycas that have buoyant seeds occupy coastal habitats. By integrating evidence from simulations whole plastomic data, we examined circulation...
Guam’s cycad known as Cycas micronesica has been threatened by a coalition of invasive herbivore species, and the armored scale Aulacaspis yasumatsui emerged primary threat. This lethal pest invaded Guam in 2003, Species Survival Council International Union for Conservation Nature (IUCN) began publishing recommendations addressing protection population 2005. Sustained epidemic mortality caused addition C. to United States Endangered Act 2015. The need establish sustainable biological control...
The genus Cycas is reviewed for India.Eight species are treated, one of them published the first time (Cycas indica).The placed within an infrageneric classification previously outlined.Distributions all taxa mapped, and a key to provided.
Two major lineages of beetles inhabit cycad cones in the New World: weevils (Curculionoidea) subtribe Allocorynina, including genera Notorhopalotria Tang and O’Brien, Parallocorynus Voss, Protocorynus O’Brien Rhopalotria Chevrolat, family Erotylidae, genus Pharaxonotha Reitter. Analysis 16S ribosomal RNA (rRNA) mitochondrial gene as well cladistic analysis morphological characters indicate four radiations, with a probable origin on Dioon Lindl. comparatively recent host shifts onto Zamia L....
Conservation agencies charged with care of threatened plant species should be governed by the concepts that conservation actions do no harm. Adaptive management research progresses in imperfect situations due to incomplete knowledge. Interpreting new experimental or observational evidence for inclusion plans first consider big picture identifying collateral quandaries before scaling up approach large-scale implementation. We discuss a case study Cycas micronesica activities on island Guam....
Plastid genomes (plastomes) present great potential in resolving multiscale phylogenetic relationship but few studies have focused on the influence of genetic characteristics plastid genes, such as variation and discordance, phylogeny within a lineage. Here we examine plastome Cycas L., most diverse genus among extant cycads, investigate deep relationships by sampling 47 plastomes representing all major clades from six sections.All shared consistent gene content structure with only one loss...
The extent of Chilades pandava Horsfield herbivory among 85 Cycadaceae species was determined by three evaluators in a common garden setting Thailand to identify patterns that may improve horticultural and conservation management practices. significant differences damage from this invasive lepidopteran pest ranged 8.7-fold the species. Phylogenetic sections monogeneric cycad family did not correspond relative species, country nativity also informative for purpose. We suggest Cycas L. share...
A case study is described wherein strong focus on research during the developing threats that caused elevation of Cycas micronesica from Near Threatened to Endangered status illustrates how targeted results may be used aid in conservation education. We argue devotion a portion funds addition mitigation efforts improve ultimate success.
Previous molecular dating studies revealed historical mass extinctions and recent radiations of extant cycads, but debates still exist between palaeobotanists evolutionary biologists regarding the origin evolution Cycadaceae.Using whole plastomic data, we revisited phylogeny this family found Palawan endemic Cycas clade was strongly related to all lineages from Southeast Eurasia, coinciding with a plate drift event occurring in Early Oligocene. By integrating fossil biogeographical...
Cycads are regarded as an ancient lineage of living seed plants, and hold important clues to understand the early evolutionary trends plants. The molecular phylogeny spatio-temporal diversification one species-rich genera cycads, Macrozamia, have not been well reconstructed.We analysed a transcriptome dataset 4740 single-copy nuclear genes (SCGs) 39 Macrozamia species two outgroup taxa. Based on concatenated (maximum parsimony, maximum likelihood) multispecies coalescent analyses, we first...
Ceratozamia Brongn. is one of the species-rich genera Cycadales comprising 38 species that are mainly distributed in Mexico, with a few reported from neighboring regions. Phylogenetic relationships within genus need detailed investigation based on extensive datasets and reliable systematic approaches. Therefore, we used 30 known to reconstruct phylogeny transcriptome data 3954 single-copy nuclear genes (SCGs) via coalescent concatenated approaches three comparative (nt/nt12/aa). Based all...
We made drill holes in the stems of six Cycas species and used a standard microtechnique microscopy methods to determine structural responses soft-wooded, parenchymatous (manoxylic) after 2 12 months recovery. also injected an aqueous stain one plant per transverse hydraulic pathways among discrete tissue categories. Expanding secondary decay insect larva infestations were evident some wounds months. Wounds that lacked complications had recovered as result wound periderm Large areas rotting...
Abstract Zamia amplifolia Hort. W. Bull ex Mast., Z. roezlii Linden, and wallisii A. Braun have been unnecessarily neotypified because original material exists at K or STO. oligodonta E. Calderón & D.W. Stev. is synonymized with montana Braun. lindenii Regel André considered specifically distinct from poeppigiana Mart. Eichler. The genus Chigua the new combination restrepoi (D.W. Stev.) Lindst. proposed, C. bernalli .
The genus Cycas is reviewed for Indonesia.Ten species are enumerated, two of them new (C.sundaica, C. montana).Lectotypes designated Subsection Endemicae, glauca, circinalis subsp.riuminiana var.curranii forma maritima J.Schust.The placed within an infrageneric classification previously outlined.Distribution all taxa mapped, and a key to provided.Extensions into Malaysia (C.edentata) Papua New Guinea (C.apoa, papuana, scratchleyana) discussed under the species.Previous recordings from...
Abstract Background and Aims Cycads are a key lineage to understand the early evolution of seed plants their response past environmental changes. However, tracing evolutionary trajectory cycad species is challenging when robust relationships at inter- or infrageneric level not well resolved. Methods Here, using 2901 single-copy nuclear genes, we explored gene flow within second largest genus cycads, i.e. Zamia, based on phylotranscriptomic analyses 90 % extant Zamia species. Based...
Curcuma woodii, a new species of subg. Ecomata (Zingiberaceae) from Thailand is described and illustrated here. It differs C. rhomba by the leaf blades abaxially pubescent, bracts whitish green, labellum white with orange bands at center, lateral staminodes dots apex, ovary nearly glabrous.
Zamia acuminata has remained an obscure, poorly understood species for over a century due to possibly misinterpreted or erroneous locality data on the unicate sterile type specimen, very brief protologue description, misidentification of plants from El Valle de Antón in Panama as Z. acuminata, and determinations Costa Rica fairchildiana. Recently collected material San José Province is here determined be identical single leaf holotype acuminata. We consider Rican endemic restricted western...
The literature containing which chemical elements are found in cycad leaves was reviewed to determine the range values of concentrations reported for essential and beneficial elements. We 46 358 described species had at least one element date. only genus that missing from data Microcycas. Many reports contained several macronutrients no other greater nitrogen phosphorus than means plants throughout world. Magnesium identified as macronutrient has been studied. Only 14 were represented by...