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50 results for “Velloziaceae”
Vellozioid roots allow for habitat specialisation among rock- and soil-dwelling Velloziaceae in campos rupestres
<p>1. Plant growth on harsh substrates (habitat specialisation) requires specific traits to cope with stressful conditions. 2. We tested whether traits related to nutrient acquisition (root colonisation by fungal symbionts, and plant morphological and physiological specialisations), and nutrient use (leaf nitrogen (N) and phosphorus (P) concentrations and N- and P-remobilisation efficiency), were related to habitat specialisation for 27 species of Velloziaceae growing either in soil or on rocks in extremely P-impoverished <i>campos rupestres</i> habitats. If habitat specialisation were to drive trait sorting, then we expect traits to differ between those substrates. 3. Both soil and rock-dwelling species presented a very low proportion of root length colonised by arbuscular mycorrhizal and dark septate fungi. However, rhizosheaths were only observed in soil-dwelling species, and vellozioid roots, a specialisation that allows for mining P and dissolving quartzite rock, were mostly found in rock-dwelling species. We did not observe differences in nutrient-use traits between rock- and soil-dwelling species. 4. Roots specialisations are strongly correlated with microhabitats, and the presence of vellozioid roots seems to mediate bare rock specialisation. There is an overall P limitation of plant productivity both on rock and in soil of <i>campos rupestres</i>, which does not drive the sorting of traits related to aboveground nutrient use and symbiotic P acquisition. Therefore, nutrient impoverishment is indeed a very strong environmental filter in <i>campos rupestres </i>as a whole, but habitat specialisation plays an important role in the spatial distribution of Velloziaceae between contrasting substrates.</p>
Vellozioid roots allow for habitat specialisation among rock- and soil-dwelling Velloziaceae in campos rupestres
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FIGURES 41–51. Xerophytavorus furcillatus gen.n in New leafhopper genera and species (Hemiptera: Cicadellidae) which feed on Velloziaceae from Southern Africa, with a discussion of their trophobiosis
FIGURES 41–51. Xerophytavorus furcillatus gen.n. & sp.n., female. 41, sternite 7; 42, valvula 3; 43–47, valvula 1; 43, image of sculpturing at narrow apex; 44, image of whole structure and valvifer; 45, image of sculpturing at wide apex; 46, line drawing of sculpture medially; 47, line drawing of sculpture at apex; 48–51, valvula 2; 48, image of whole structure; 49, line drawing of serration medially; 50, line drawing of serration at apex; 51, image of serration at apex.
FIGURES 77–87. Xerophytacolus claviverpus gen.n in New leafhopper genera and species (Hemiptera: Cicadellidae) which feed on Velloziaceae from Southern Africa, with a discussion of their trophobiosis
FIGURES 77–87. Xerophytacolus claviverpus gen.n. & sp.n., male. 77, tegmina; 78, pygofer, dorsal view; 79, anterior abdominal apodeme, dorsal view; 80, posterior abdominal apodeme, dorsal view; 81, plate and valve, ventral view; 82, style; 83, pygofer, lateral view; 84, process at pygofer lobe apex, lateral view; 85, aedeagus, dorsal view; 86, aedeagus, lateral view; 87, connective.
FIGURES 1–7. Xerophytavorus gen.n in New leafhopper genera and species (Hemiptera: Cicadellidae) which feed on Velloziaceae from Southern Africa, with a discussion of their trophobiosis
FIGURES 1–7. Xerophytavorus gen.n.. 1, 2, Xerophytavorus furcillatus gen.n. & sp.n., Specimen from Malawi; 1, male; 2, female; 3–7, Xerophytavorus rastrullus gen.n. & sp.n.; 3, female, Pretoria, collected 1970; 4, female, Dome Kloof, Magaliesberg; 5, nymph, Koppie Alleen; 6, male, face; 7, female, Swawelpoort.
FIGURES 28–40. Xerophytavorus furcillatus gen.n in New leafhopper genera and species (Hemiptera: Cicadellidae) which feed on Velloziaceae from Southern Africa, with a discussion of their trophobiosis
FIGURES 28–40. Xerophytavorus furcillatus gen.n. & sp.n., male. Head and pronotum, 28, dorsal view; 29, face; 30, lateral view; 31, tegmina; 32, foretibia setation; 33, dorsal view, distal right metafemur; 34, style; 35, pygofer, dorsal view; 36, pygofer, lateral view; 37, plate and valve, ventral view; 38, aedeagus and connective, dorsal view; 39, aedeagus and connective, lateroventral view; 40, process and apical macrosetae cluster on pygofer, medial view.
FIGURES 113–122. Xerophytacolus tubuverpus gen.n in New leafhopper genera and species (Hemiptera: Cicadellidae) which feed on Velloziaceae from Southern Africa, with a discussion of their trophobiosis
FIGURES 113–122. Xerophytacolus tubuverpus gen.n. & sp.n., female. 113, sternite 7; 114, valvula, 3; 115–118, valvula 1; 115, image of sculpture at apex; 116, image of whole structure; 117, line drawing of sculpture at apex; 118, line drawing of sculpture medially; 119–122, valvula 2; 119, line drawing of serration medially; 120, line drawing of serration at apex; 121, image of serration at apex; 122, image of whole structure.
FIGURES 64–76. Xerophytavorus rastrullus gen.n in New leafhopper genera and species (Hemiptera: Cicadellidae) which feed on Velloziaceae from Southern Africa, with a discussion of their trophobiosis
FIGURES 64–76. Xerophytavorus rastrullus gen.n. & sp.n., female. 64, tegmina; 65, hind wing; 66, valvula 3; 67, sternite 7; 68–71, valvula 1; 68, image of whole structure and valvifer; 69, image of sculpturing at apex; 70, line drawing of sculpture medially; 71, line drawing of sculpture at apex; 72–76, valvula 2; 72, image of whole structure, apex distorted; 73, image of sclerotized medial section; 74, image of serration at apex; 75, line drawing of serration at apex; 76, line drawing of serration medially.
FIGURES 98–112. Xerophytacolus tubuverpus gen.n in New leafhopper genera and species (Hemiptera: Cicadellidae) which feed on Velloziaceae from Southern Africa, with a discussion of their trophobiosis
FIGURES 98–112. Xerophytacolus tubuverpus gen.n. & sp.n., male. 98, head, dorsal view; 99, face; 100, head, lateral view; 101, tegmina; 102, hind wing; 103, anterior abdominal apodeme, anterior view; 104, posterior abdominal apodeme, anterior view; 105, pygofer, dorsal view; 106, plate and valve, ventral view; 107, pygofer, lateral view; 108, apical pygofer process, medial view; 109, aedeagus, dorsal view; 110, aedeagus, lateral view; 111, connective; 112, style.
FIGURES 52–63. Xerophytavorus rastrullus gen.n in New leafhopper genera and species (Hemiptera: Cicadellidae) which feed on Velloziaceae from Southern Africa, with a discussion of their trophobiosis
FIGURES 52–63. Xerophytavorus rastrullus gen.n. & sp.n., male. 52, tegmina; 53, foretibia setation; 54, aedeagus and connective, dorsal view; 55, anterior and posterior abdominal apodemes, anterior view; 56, posterior abdominal apodeme, dorsal view; 57, anterior abdominal apodeme, dorsal view; 58, pygofer, dorsally; 59, pygofer, lateral view; 60, process and apical macrosetae cluster on pygofer, ventral view; 61, plate and valve, ventral view; 62, aedeagus, lateral view; 63, style.
FIGURES 22–27 in New leafhopper genera and species (Hemiptera: Cicadellidae) which feed on Velloziaceae from Southern Africa, with a discussion of their trophobiosis
FIGURES 22–27. Images of Xerophyta species, host plants of Xerophytavorus gen.n. and Xerophytacolus gen.n. species. 22, 23, Xerophyta sp. in grassland at Malolotja Nature Reserve, Swaziland; 24, approx. 1 m tall plant in Chimanimani Nature Reserve, Zimbabwe; 25, hairy-leaved Xerophyta sp. in The Downs, Orrie Baragwanath Pass, South Africa; 26, up to 2 m tall plant near Lydenburg, South Africa; 27, habitat at Faerie Glen Nature Reserve, Pretoria, where most trophobiosis observations were made.
FIGURES 88–97. Xerophytacolus claviverpus gen.n in New leafhopper genera and species (Hemiptera: Cicadellidae) which feed on Velloziaceae from Southern Africa, with a discussion of their trophobiosis
FIGURES 88–97. Xerophytacolus claviverpus gen.n. & sp.n., female. 88, sternite 7; 89, valvula, 3; 90–93, valvula 1; 90, whole structure; 91, image of sculpture at apex; 92, line drawing of sculpture medially; 93, line drawing of sculpture at apex; 94–97, valvula 2; 94, whole structure; 95, image of serration at apex; 96, line drawing of serration at apex; 97, line drawing of serration medially.
FIGURES 8–14. Xerophytacolus gen.n. 8–11, Xerophytacolus claviverpus gen.n in New leafhopper genera and species (Hemiptera: Cicadellidae) which feed on Velloziaceae from Southern Africa, with a discussion of their trophobiosis
FIGURES 8–14. Xerophytacolus gen.n. 8–11, Xerophytacolus claviverpus gen.n. & sp.n.; 8, male, face; 9, nymph; 10, male, The Downs, Orrie Baragwanath Pass, South Africa; 11, forewing. 12–14, Xerophytacolus tubuverpus gen.n. & sp.n., Faerie Glen, Pretoria; 12, male; 13, female; 14, nymph.
FIGURE 1. A–G in Two new remarkable species of Barbacenia (Velloziaceae) from the Brazilian Espinhaço Range in honor of Renato Mello-Silva
FIGURE 1. A–G. Barbacenia glaucescens (Menezes 1395). A. Habit. B. Leaf apex. C. Detail of leaf margin. D. Detail of the flower. E. Sepal apex. F. Petal apex. G. Corona lobes and stamens. H–R. Barbacenia mellosilvae (Pirani 5593). H. Habit. I. Leaf apex. J. Detail of the flower. K. Detail of the hypanthium, transition between the section fused to ovary and tube. L. Frontal view of the corona lobe and stamen. M. Detail of the corona lobules. N. Lateral view of the corona lobe and stamen. O. Apical portion of the style and confluent stigmatic regions. P. Sepal abaxial side. Q. Petal abaxial side. R. Immature capsule. Bar scale = 0.5 cm.
FIGURE 4 in Two new remarkable species of Barbacenia (Velloziaceae) from the Brazilian Espinhaço Range in honor of Renato Mello-Silva
FIGURE 4. Distribution of Barbacenia glaucescens (black circle) and B. mellosilvae (white circle) in the Espinhaço Range, Minas Gerais state, Brazil.
FIGURE 2. A–C. Barbacenia glaucescens. A in Two new remarkable species of Barbacenia (Velloziaceae) from the Brazilian Espinhaço Range in honor of Renato Mello-Silva
FIGURE 2. A–C. Barbacenia glaucescens. A. Population in its natural habitat. B. Habit. C. Flower in longitudinal view. D–F. Barbacenia mellosilvae. D. Population in its natural habitat. E. Flower in longitudinal view. F. Flower in top view. All photos by C.A. Ferreira-Júnior, except D by D. Zappi.
FIGURE 5 in Two new critically endangered species of Vellozia (Velloziaceae) from the Campos Rupestres of Espinhaço Range, Brazil
FIGURE 5. Vellozia formosa Mello-Silva ex Magri. A: Habit. B: Detail of the flower of the unique individual found with flowers (March, 2023). C: General view of a population occurring on sandy soil. Credit of photos A and B: R.B. Almeida. C: R.A. Magri.
FIGURE 2 in Two new critically endangered species of Vellozia (Velloziaceae) from the Campos Rupestres of Espinhaço Range, Brazil
FIGURE 2. Vellozia flavida Mello-Silva ex Magri. A: Habit. B: Detail of the fruit. C: Detail of the flower and immature fruit. Credit of photos A: R.A. Magri; B and C: R.B. Almeida.
FIGURE 4 in Two new critically endangered species of Vellozia (Velloziaceae) from the Campos Rupestres of Espinhaço Range, Brazil
FIGURE 4. Vellozia formosa Mello-Silva ex Magri. A and B: General aspect of the plant. C: apical portion of leaf blade showing the indument. D: detail of the hypanthial emergences. Illustration based on specimen R. Mello-Silva 4370 (SPF).
FIGURE 1 in Two new critically endangered species of Vellozia (Velloziaceae) from the Campos Rupestres of Espinhaço Range, Brazil
FIGURE 1. Vellozia flavida Mello-Silva ex Magri. A and B: General aspect of the plant. C: apical portion of the leaf blade. D: detail of the hypanthial emergences. Illustration based on specimen R.B. Almeida 841 (SPF).
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