A5004442686- Plant Diversity and Evolution
- Plant and animal studies
- Botany, Ecology, and Taxonomy Studies
- Fern and Epiphyte Biology
- Plant Taxonomy and Phylogenetics
- Plant Reproductive Biology
- Geology and Paleoclimatology Research
- Ecology and Vegetation Dynamics Studies
- Plant biochemistry and biosynthesis
- Botanical Research and Applications
- Plant Molecular Biology Research
- Plant Parasitism and Resistance
- Botany and Plant Ecology Studies
- Plant Pathogens and Fungal Diseases
- Plant and Fungal Species Descriptions
- Plant Micronutrient Interactions and Effects
- Genomics and Phylogenetic Studies
- Clay minerals and soil interactions
- Leaf Properties and Growth Measurement
- Silicon Effects in Agriculture
- Seed Germination and Physiology
- Aluminum toxicity and tolerance in plants and animals
- Growth and nutrition in plants
- Geochemistry and Elemental Analysis
- Date Palm Research Studies
Royal Botanic Gardens, Kew
2011-2022
University of New England
2013-2020
ABSTRACT An important goal of the angiosperm systematics community has been to develop a shared approach molecular data collection, such that phylogenomic sets from different focal clades can be combined for meta-studies across entire group. Although significant progress made through efforts as DNA barcoding, transcriptome sequencing, and whole-plastid current lacks cost efficient methodology collecting nuclear all angiosperms. Here, we leverage genomic resources 43 species enrichment probes...
Reproductive units (RUs) of Trithuria , the sole genus early‐divergent angiosperm family Hydatellaceae, are compared with flowers their close relatives in Cabombaceae (Nymphaeales). RUs combine features and inflorescences. They differ from typical possessing an “inside‐out” morphology, carpels surrounding stamens; furthermore, develop centrifugally, contrast to centripetal or simultaneous development flowers. could be interpreted as pseudanthia two more cymose partial inflorescences enclosed...
The ultrastructure of the pollen tubes and unusual multicellular stigmatic hairs Trithuria, sole genus Hydatellaceae, are described in context comparative studies transmitting tissue other early-divergent angiosperms. Scanning transmission electron microscopy immunocytochemistry used to study structure composition both mature immature hair cells pollen-tube growth Trithuria. Trithuria possesses a dry-type stigma. Pollen grow within cell walls long hairs. Immunocytochemistry results suggest...
Plants combine both chemical and structural means to appear colorful. We now have an extensive understanding of the metabolic pathways used by flowering plants synthesize pigments, but mechanisms remain obscure whereby cells produce microscopic structures sufficiently regular interfere with light create optical effect. Here, we transgenic approaches in a novel model system, Hibiscus trionum, analyses cuticle, lines different species Hibiscus, investigate formation semi-ordered diffraction...
The small aquatic family Hydatellaceae was recently assigned to the early‐divergent angiosperm order Nymphaeales. Pollen morphology is described using both SEM and LM for all 12 species of Hydatellaceae, TEM one (T. submersa). These observations are compared with pollen data from other two families Nymphaeales, Nymphaeaceae Cabombaceae, including original genera Cabombaceae. No significant interspecific variation in occurs though perennial (Trithuria inconspicua T. filamentosa), which could...
Species of Araceae accumulate calcium oxalate in the form characteristically grooved needle-shaped raphide crystals and multi-crystal druses. This study focuses on distribution development raphides druses during leaf growth ten species Amorphophallus (Araceae) order to determine crystal macropatterns underlying ultrastructural features associated with formation unusual groove. Transmission electron microscopy (TEM), scanning (SEM) both bright-field polarized-light were used a range...
Bromeliaceae possess several features of pollen and anther wall development that are plesiomorphic for Poales, consistent with their putatively basal or near‐basal placement in this order. For example, successive microsporogenesis the monocotyledonous type formation both occur commonly other a few notable exceptions, notably simultaneous Rapateaceae. The intermediate tapetum was probably derived secondarily from secretory type, which occurs most Poales except Typhaceae.
In the sedge subfamily Mapanioideae there are considerable discrepancies between standard trimerous monocot floral architecture expected and complex inflorescence morphologies seen. Decades of debate about whether basic reproductive units single flowers or pseudanthia have not resolved question. This paper evaluates current knowledge Mapaniid structures presents an ontogenetic study genus Lepironia with first protein expression maps for family, localizing products APETALA1/FRUITFULL-like...
This paper presents the first record of silica deposits in tissues Haemodoraceae and adds new records tapetal raphides this family. Within order Commelinales, is present leaves three families (Hanguanacaeae, Commelinaceae), but entirely absent from other two (Pontederiaceae Philydraceae). Presence or absence characteristic cell inclusions may have systematic potential commelinid monocotyledons, although existing topology indicates de novo gains losses individual families. Silica sand was...
Floral anatomy is described in eight species (representing five genera) of Pontederiaceae, and floral ontogeny Pontederia cordata. The results are assessed the context recent phylogenetic work on which indicates that unilocular ovary condition has been achieved by two different, non-homologous routes Pontederiaceae: via loss interlocular septa Heteranthera Hydrothrix, pseudomonomery Pontederia, a single fertile carpel. Absence septal nectaries evolved more than once at least Heterantha...
Botanical, historical, and archaeological collections have been the source of extraordinarily long-lived seeds, which used to revive extinct genotypes or species. The longest-lived example a viable seed known age is date palm, Phoenix dactylifera L., an estimated 2000-year-old was germinated in 2005. Seed longevity important for agriculture biodiversity conservation, understanding basis extraordinary seeds from botanical could help improve banking technology. In this work, we studied...
The PhyloCode is used to classify taxa based on their relation a most recent common ancestor as recovered from phylogenetic analysis. We examined the first specimen of Cintractiella (Ustilaginomycotina) collected Australia and determined its systematic relationship other Fungi. Three ribosomal DNA loci were analysed both with without constraint phylogenomic hypothesis Ustilaginomycotina. did not share orders smut fungi. define Cintractiellales, monogeneric order four species Cintractiella,...
Summary Helicoidally arranged layers of cellulose microfibrils in plant cell walls can produce strong and vivid coloration a wide range species. Despite its significance, the morphogenesis walls, whether reflective or not, is not fully understood. Here we show that by optically monitoring reflectance Pollia japonica fruits during development directly map structural changes wall on scale tens nanometres. Visible‐light spectra from individual living cells were measured throughout fruit...
Summary The rattan genus Korthalsia Blume (Arecaceae: Calamoideae: Calameae) is widespread in the Malesian region. Among 28 accepted species are 10 that form intimate associations with ants. ants inhabit conspicuous ocreas produced by these species, using them as domatia to care for their young and aphids. As a foundation future work, we present here taxonomic treatment of myrmecophilous based on extensive research pursued both herbarium field. In addition, conduct detailed morphological...
Okra (Abelmoschus esculentus) and tomatoes (Lycopersicum esculentum) were grown in saline (3.0 dS m -1 NaCl) non-saline soil irrigated with (2.4 or water to determine the response of stomatal density morphology salinity.Stomata (stomata number per unit leaf area) for tomato on was reduced by 33% (12 mm -2 ) compared those soils (18 ); this reduction more severe adaxial surface where low.Similar reductions observed water.Stomata size significantly about 20% both types salinity, thus...
The stigma of Caesalpinia pulcherrima is crateriform. crater continues as a slit-like canal through the style and into ovary. Both are lined by several layers fusiform thin-walled cells which continuous in two narrow regions Postanthesis before pollination, middle lamella lining stigmatic stylar transmitting tissue undergoes dissolution. This occurs progression down with separating partially or wholly from neighbours. Dissolution initiated at intercellular junctions where wall fibrils loosen...