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68 results for “leaf type”
Biomass totals and root biomass (partitioned by percent of total leaf area) for species, tissue type, and functional group for the Arctic LTER experimental 1981 mesic acidic tussock tundra (MAT81) for the 2000 and 2015 harvests, Toolik Field Station, Alaska.
Whole plant biomass totals and root biomass (partitioned by percent of total leaf area) for species, tissue type, and functional group for the Arctic LTER experimental 1981 mesic acidic tussock tundra (MAT81) for the 2000 and 2015 harvests. Because most of the root biomass could not be identified to species in either 2000 or 2015, the calculation of root biomass and element content for roots not identified to species was estimated by the proportion of those species’ contributions to total leaf area. Specific Leaf Area (SLA = leaf area per gram leaf, centimeter squared per gram) values were available from several previous harvests of this experiment; in the present study, we used measurements from the 1995 harvest (Shaver et al. 2001).
Text-fig. 2. Ferns, Ginkgo, and taxodioid conifers. a: Filicalean fern type 1. UAPC-ALTA S sn. b, c: Filicalean fern type 2. b: Overview of specimen, UAPC-ALTA S 59515. c: Detail of (b) to show pinnule shape. d: Azolla primaeva, small plant fragments and rhizoids, BBM-PAL-P000002. e: Metasequoia occidentalis twig with leafy branchlets, BBM- PAL-P000003. f: Ginkgo biloba leaf showing dichotomous venation, GSC 7567. g: Taxodioid branches with flared shoot apices that may represent small cones, UAPC-ALTA S 25090. h: Metasequoia occidentalis branchlet showing opposite leaves, UAPC-ALTA S 59495. i: Taxodioid branchlet showing variation, BBM-PAL-P000004. j: Taxodioid pollen cone, BBM-PAL-P000045. k: Metasequoia seed cone, BBM-PAL-P000005 A. l: cf. Chamaecyparis, BBM-PAL-P000006. Scale bars: a–c, f–l = 1 cm, d = 0.5 cm, e = 2 cm. in The Early Eocene Flora Of Horsefly, British Columbia, Canada And Its Phytogeographic Significance
Text-fig. 2. Ferns, Ginkgo, and taxodioid conifers. a: Filicalean fern type 1. UAPC-ALTA S sn. b, c: Filicalean fern type 2. b: Overview of specimen, UAPC-ALTA S 59515. c: Detail of (b) to show pinnule shape. d: Azolla primaeva, small plant fragments and rhizoids, BBM-PAL-P000002. e: Metasequoia occidentalis twig with leafy branchlets, BBM- PAL-P000003. f: Ginkgo biloba leaf showing dichotomous venation, GSC 7567. g: Taxodioid branches with flared shoot apices that may represent small cones, UAPC-ALTA S 25090. h: Metasequoia occidentalis branchlet showing opposite leaves, UAPC-ALTA S 59495. i: Taxodioid branchlet showing variation, BBM-PAL-P000004. j: Taxodioid pollen cone, BBM-PAL-P000045. k: Metasequoia seed cone, BBM-PAL-P000005 A. l: cf. Chamaecyparis, BBM-PAL-P000006. Scale bars: a–c, f–l = 1 cm, d = 0.5 cm, e = 2 cm.
Text-fig. 4. Monocots. a, b: Large monocot leaf part and counterpart, UAPC-ALTA S 17955A, B. a: Wide leaf showing entire margin at left. b: Counterpart showing dark wide midrib, and and secondaries parallel to one another, arising at low acute angle. c–e: Monocot leaf with parallel venation. c: Overview of elongate monocot leaf with parallel veins horizontal and linear to oval structures and smaller leaf fragment of same type lacking them (at lower right), UAPC-ALTA S 59491. d: Higher magnification of the smaller fragment with weak cross veins. e: Higher magnification of larger specimen with linear to oval structures between parallel veins. f, g: Monocot leaf with parallel venation. Fig. (f) shows higher magnification and (g) shows overview, BBM-PAL-P000009. Scale bars: a, b = 5 cm, c = 4 cm, d–f = 1 cm, g = 2 cm. in The Early Eocene Flora Of Horsefly, British Columbia, Canada And Its Phytogeographic Significance
Text-fig. 4. Monocots. a, b: Large monocot leaf part and counterpart, UAPC-ALTA S 17955A, B. a: Wide leaf showing entire margin at left. b: Counterpart showing dark wide midrib, and and secondaries parallel to one another, arising at low acute angle. c–e: Monocot leaf with parallel venation. c: Overview of elongate monocot leaf with parallel veins horizontal and linear to oval structures and smaller leaf fragment of same type lacking them (at lower right), UAPC-ALTA S 59491. d: Higher magnification of the smaller fragment with weak cross veins. e: Higher magnification of larger specimen with linear to oval structures between parallel veins. f, g: Monocot leaf with parallel venation. Fig. (f) shows higher magnification and (g) shows overview, BBM-PAL-P000009. Scale bars: a, b = 5 cm, c = 4 cm, d–f = 1 cm, g = 2 cm.
Text-fig. A2. a: Ulmus carpinifolia GLED., 1773 syn. of Ulmus minor MILL., 1768, (herbarium E00824885). b: Ulmus carpinifolia GLED., 1773 syn. of Ulmus minor MILL., 1768, (herbarium E00824885). c: Ulmus carpinifolia GLED., 1773 syn. of Ulmus minor MILL., 1768, (herbarium E00824885 detail of (a)). d, e: Ulmus elliptica K.KOCH, 1849 (herbarium E00034393). f, g: Ulmus lancifolia ROXB., 1814, nom. inval. (herbarium NMNH03413489). h: Ulmus lancifolia ROXB., 1814, nom. inval. (herbarium NMNH03413488). Asterisks indicate different types of asymmetric leaf base. Scale bars 50 mm (a, d, e, f), 10 mm (b, c, g, h). in The Late Early Pleistocene Flora Of Oriolo, Faenza (Italy): Assembly Of The Modern Forest Biome
Text-fig. A2. a: Ulmus carpinifolia GLED., 1773 syn. of Ulmus minor MILL., 1768, (herbarium E00824885). b: Ulmus carpinifolia GLED., 1773 syn. of Ulmus minor MILL., 1768, (herbarium E00824885). c: Ulmus carpinifolia GLED., 1773 syn. of Ulmus minor MILL., 1768, (herbarium E00824885 detail of (a)). d, e: Ulmus elliptica K.KOCH, 1849 (herbarium E00034393). f, g: Ulmus lancifolia ROXB., 1814, nom. inval. (herbarium NMNH03413489). h: Ulmus lancifolia ROXB., 1814, nom. inval. (herbarium NMNH03413488). Asterisks indicate different types of asymmetric leaf base. Scale bars 50 mm (a, d, e, f), 10 mm (b, c, g, h).
LT-Brazil: A database of leaf traits across biomes and vegetation types in Brazil
<p><span>Motivation: Leaf traits represent an important component of plant functional strategies, and those related to carbon fixation and nutrient acquisition form the leaf economics spectrum. However, observations of functional leaf traits are underrepresented in tropical regions in comparison with those in temperate areas. Brazil, a country with continental scale and vast biodiversity is a timely example, where many biomes are impacted by human activities and climate change. However, leaf traits relevant to understand vegetation responses to these impacts remain poorly quantified for many species found in the country. We compiled an extensive data set of four functional leaf traits for native woody species occurring in the Brazilian territory. In addition to trait observations, sampling dates and geo-references were compiled and climatic parameters and soil properties of each sampling site were extracted from several databases.</span></p> <p><span>Main types of variables contained: The LT-Brazil data set contains 3479, 1216, 775, and 775 clean observations of leaf mass per area, leaf nitrogen (N) concentration per unit mass, leaf phosphorus (P) concentration per unit mass, and leaf N : P ratio, respectively, from native woody species, encompassing information of biome, vegetation, taxonomic data, geographical coordinates, climatic parameters, as well as soil properties.</span></p> <p><span>Spatial location and grain: We compiled trait observations from 223 sites under native vegetation distributed in all main biomes (i.e., Amazônia, Caatinga, Cerrado, Mata Atlântica, Pampa, and Pantanal) across the Brazilian territory.</span></p> <p><span>Time period and grain: The data represent information published and/or sampled during the last 25 years.</span></p> <p><span>Major taxa and level of measurement: Our compilation was focused on trait data observed for native woody species, excluding monocots, palm trees, herbs, and hemiparasitic plants. Thus, 108, 478, and 1321 botanical families, genera, and species were included, covering <em>c.</em> 9% of the woody angiosperm flora of Brazil.</span></p> <p>Software format: Data are provided as comma-separated value (.csv) files.</p>
LT-Brazil: A database of leaf traits across biomes and vegetation types in Brazil
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Figure 4. Regression between senescence leaf N in Foliar resorption of nitrogen and phosphorus in Alcea apterocarpa (Malvaceae) in different habitats types
Figure 4. Regression between senescence leaf N/P ratio and RE and RP of A. apterocarpa.
Figure 3. Regression between green leaf N in Foliar resorption of nitrogen and phosphorus in Alcea apterocarpa (Malvaceae) in different habitats types
Figure 3. Regression between green leaf N/P ratio and RE and RP of A. apterocarpa.
Mercury accumulation in leaves of different plant types – the significance of tissue age and specific leaf area
<p></p><p>Mercury, Hg, is one of the most problematic metals from an environmental perspective. To assess the problems caused by Hg in the environment it is crucial to understand the processes of Hg biogeochemistry, but the exchange of Hg between the atmosphere and vegetation is not sufficiently well characterised. We explored the mercury concentration, [Hg], in foliage from a diverse set of plant types, locations and sampling periods to study whether there is a continuous accumulation of Hg in leaves/needles over time. Measurements of [Hg] were made in deciduous and conifer trees in Gothenburg, Sweden (Botanical Garden and city area) as well as of evergreen trees in Rwanda. In addition, data for wheat from an ozone experiment conducted at Östad, Sweden, were included. Conifer data were quantitatively compared with literature data. In every case where older foliage was directly compared with younger, [Hg] was higher in older tissue. Covering the range of current year up to four-year old needles, there was no sign of Hg saturation in conifer needles with age. Thus, over time scales of approximately one month to several years, the Hg uptake in foliage from the atmosphere always dominated over Hg evasion. Rwandan broadleaved trees had generally older leaves due to lack of seasonal abscission and higher [Hg] than Swedish broadleaved trees. The significance of atmospheric Hg uptake in plants was shown in a wheat experiment where charcoal filtrated air lead to significantly lower leaf [Hg]. To search for general patterns, the accumulation rates of Hg in the diverse set of tree species in the Gothenburg area were related to the specific leaf area (SLA). Leaf area based [Hg] was strongly negatively and non-linearly correlated with SLA, while mass-based [Hg] had a somewhat weaker positive relationship with SLA (both relationships with p < 0.001). An elaborated understanding of the relationship behind [Hg] and SLA would support large-scale modelling of Hg uptake by vegetation and Hg circulation in general. </p><p></p>
Morphology, anatomy and photosynthesis data for two leaf types of Ficus pumila
<p class="MsoNormal"><span>Plants that display heteroblasty possess conspicuous variations in leaf morphology between their juvenile and adult phases, with certain species retaining juvenile-like leaves even in adulthood. Nevertheless, the ecological advantages of maintaining two or more distinct leaf types in heteroblastic plants at the adult stage remain unclear. The aim of this study is to examine the adaptive significance of heteroblastic leaves sampled from branches with divergent functions (sterile and fertile branches) of mature <em>Ficus pumila</em> individuals by comparing their morphological, anatomical, and physiological characteristics. Leaves on sterile branches (LSs) exhibited a significantly larger specific leaf area, thinner palisade and spongy tissues, lower chlorophyll contents, and lower light saturation points than leaves on fertile branches (LFs). These results demonstrate that LSs are better adapted to low light environments, while LFs are well equipped to take advantages of high light conditions. However, both LFs and LSs have a low light compensation point with no significant difference between them, indicating that they start to accumulate photosynthetic products under same light conditions. Interestingly, significant higher net photosynthetic rate was detected in LFs, showing they have higher photosynthetic capacity. Furthermore, LFs produced significant more nutrients compared to LSs, which may associate to their ability of accumulating more photosynthetic products under full light conditions and higher photosynthetic capacity. Overall, we observed a pattern of divergence in morphological features of leaves on two functional branches. Anatomical and physiological features indicate that LFs have an advantage in varied light conditions, providing amounts of photosynthetic products to support the sexual reproduction, while LSs adapt to low light environments. Our findings provide evidence that heteroblasty facilitates <em>F. pumila</em> to utilize varying light environments, likely associated with its growth form as a climbing plant. This strategy allows the plant to allocate resources more effectively and optimize its overall fitness.</span></p>
Impact of Mulberry Leaf on Type 2 Diabetes
ClinicalTrials.gov study NCT00795704. IPD Sharing: Not stated. Countries: 1. Publications: 5.
Mercury accumulation in leaves of different plant types – the significance of tissue age and specific leaf area
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Morphology, anatomy and photosynthesis data for two leaf types of Ficus pumila
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Interactive effects of leaf pathogens and plant mycorrhizal type on plant diversity–productivity relationships
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A compilation of canopy leaf inclination angle measurements across plant species and biome types
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Distribution. Endemic to S India (Kolar district, Karnataka), known only from type locality. Previously also on nearby Therahalli, where now absent. in Family Hipposideridae (Old World Leaf-nosed Bats)
Distribution. Endemic to S India (Kolar district, Karnataka), known only from type locality. Previously also on nearby Therahalli, where now absent.
haozhima95/Global_mapping_forest_leaf_type: Global biogeography of leaf habits and leaf types.
Mapping global exploration of proportion of deciduous and evergreen trees
FIGURE. Thalictrum atriplex in the wild (Kangding county in western Sichuan, China, the type locality). A. Habitat. B. Habit. C. Roots. D. Portion of stem. E. Leaf (left: adaxial side; right: abaxial side). F. Leaflet (adaxial side). G. Portion of inflorescence. H. Flower. I. Sepal (left: adaxial side; right: abaxial side). J. Stamens. K. Carpels. L. Aggregate fruits (immature). M. Achenes (immature). Photographed by Y.P. Zeng. in Thalictrum spiristylum (Ranunculaceae), described from northwestern Yunnan, China, is merged with T. atriplex
FIGURE. Thalictrum atriplex in the wild (Kangding county in western Sichuan, China, the type locality). A. Habitat. B. Habit. C. Roots. D. Portion of stem. E. Leaf (left: adaxial side; right: abaxial side). F. Leaflet (adaxial side). G. Portion of inflorescence. H. Flower. I. Sepal (left: adaxial side; right: abaxial side). J. Stamens. K. Carpels. L. Aggregate fruits (immature). M. Achenes (immature). Photographed by Y.P. Zeng.
FIGURE. Drosera tomentosa (a–d): a, rosette; b, rosette and base of inflorescences of D. tomentosa var. glabrata (Serra do Cipó, MG); c, inflorescence of the "type morphotype" of D. tomentosa (Chapada Diamantina, BA); d, inflorescence with open flower of the "glabrate morphotype" of D. tomentosa, side view (Diamantina, MG). Drosera villosa (e, f): e, habit; f, flower (Parque Estadual da Serra Negra da Mantiqueira, MG). Drosera viridis (g–i): g, rosettes of D. viridis (bottom) and D. communis (single plant, top; Imbituva, PR); h, leaf, detail (Piraquara, PR); i, flower (Balsa Nova, PR). Photo credits: a, b, d–f by PMG; c by FR; g–i by Carlos Rohrbacher. in A synopsis of the genus Drosera (Droseraceae) in Brazil
FIGURE. Drosera tomentosa (a–d): a, rosette; b, rosette and base of inflorescences of D. tomentosa var. glabrata (Serra do Cipó, MG); c, inflorescence of the "type morphotype" of D. tomentosa (Chapada Diamantina, BA); d, inflorescence with open flower of the "glabrate morphotype" of D. tomentosa, side view (Diamantina, MG). Drosera villosa (e, f): e, habit; f, flower (Parque Estadual da Serra Negra da Mantiqueira, MG). Drosera viridis (g–i): g, rosettes of D. viridis (bottom) and D. communis (single plant, top; Imbituva, PR); h, leaf, detail (Piraquara, PR); i, flower (Balsa Nova, PR). Photo credits: a, b, d–f by PMG; c by FR; g–i by Carlos Rohrbacher.
FIGURE. Drosera hirtella (a–i): a, b, c, habit of the "type morphotype"; d, habit of the "western morphotype"; e, rosette of the "type morphotype"; f, emerging inflorescence, highlighting the red scape with red eglandular trichomes characteristic of the species; g, fertile individuals of D. hirtella (left plant, with inflorescence emerging to the bottom) and D. lutescens (right plant, with inflorescence emerging to the top left) growing under shaded conditions side by side, highlighting the morphological differences between the two species regarding leaf shape and scape and indumentum color; h, i, flower. a–c, f and h at Serra do Cipó, MG; d and h at Chapada dos Veadeiros, GO; e at Diamantina, MG; g at Cristalina, GO. Photo credits: all by PMG. in A synopsis of the genus Drosera (Droseraceae) in Brazil
FIGURE. Drosera hirtella (a–i): a, b, c, habit of the "type morphotype"; d, habit of the "western morphotype"; e, rosette of the "type morphotype"; f, emerging inflorescence, highlighting the red scape with red eglandular trichomes characteristic of the species; g, fertile individuals of D. hirtella (left plant, with inflorescence emerging to the bottom) and D. lutescens (right plant, with inflorescence emerging to the top left) growing under shaded conditions side by side, highlighting the morphological differences between the two species regarding leaf shape and scape and indumentum color; h, i, flower. a–c, f and h at Serra do Cipó, MG; d and h at Chapada dos Veadeiros, GO; e at Diamantina, MG; g at Cristalina, GO. Photo credits: all by PMG.
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Annotated Behaviour and Observability Dataset (ABODe)
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