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10 results for “Ferns & Allies”
FIGURE 8 in Mycosphaerellaceous fungi and new species of Venustosynnema and Zasmidium on ferns and fern allies in Taiwan
FIGURE 8. Zasmidium dicranopteridis (from holotype, TNM). a. Conidiophores on external hyphae. b. Conidiophore apex with a percurrent extension, with intercalary and terminal conidiogenous cells and a conidium still attached. c. Conidia. Scale bars: a = 20 µm, b, c = 10 µm.
FIGURE 6. Pseudocercospora pteridophytophila. a. Host with leaf spots. b in Mycosphaerellaceous fungi and new species of Venustosynnema and Zasmidium on ferns and fern allies in Taiwan
FIGURE 6. Pseudocercospora pteridophytophila. a. Host with leaf spots. b. Single leaf spot with epiphyllous fascicles of conidiophores. c. Hypophyllous fascicle of conidiophores arising through a stoma (R. Kirschner 3756). d. Transversal leaf section showing internal hyphae and an epiphyllous fascicle of conidiophores arising from an intraepidermal stroma (R. Kirschner 3602). e. Conidiophores (R. Kirschner 3756). f. Conidia (R. Kirschner 3602). Scale bars: c, e = 10 µm, d, f = 20 µm.
FIGURE 7 in Mycosphaerellaceous fungi and new species of Venustosynnema and Zasmidium on ferns and fern allies in Taiwan
FIGURE 7. Vennustosynnema reniformisporum (from holotype, TNM). a. Host with dead stems and leaves. b. Synnema. c. Apices of conidiophores in the center of a synnema. d. Conidiogenous cell. e. Conidia. Scale bars = 30 µm.
FIGURE 5 in Mycosphaerellaceous fungi and new species of Venustosynnema and Zasmidium on ferns and fern allies in Taiwan
FIGURE 5. Pseudocercospora cyatheae (R. Kirschner 3808). a Host with leaf spots. b. Conidiophores with numerous percurrent extensions arising through a stoma. c. Conidia. Scale bars: b, c = 10 µm.
FIGURE 4 in Mycosphaerellaceous fungi and new species of Venustosynnema and Zasmidium on ferns and fern allies in Taiwan
FIGURE 4. Pseudocercospora athyrii (R. Kirschner 3943). a. Host with leaf spots. b. Epiphyllous conidiophores: stroma with young fascicle of conidiophores erumpent through epidermis (left) and part of a comparatively older fascicle (right). c, d. Hypophyllous conidiophores. c. Conidiophores arising from stoma. d. Conidiophores arising from external hyphae. e. Conidia. Scale bars: b–d = 10 µm, e = 20 µm.
FIGURE 3. Mycosphaerella gleicheniae, microscopic details. a–b. Sections through ascomata rupturing the upper epidermis. a in Mycosphaerellaceous fungi and new species of Venustosynnema and Zasmidium on ferns and fern allies in Taiwan
FIGURE 3. Mycosphaerella gleicheniae, microscopic details. a–b. Sections through ascomata rupturing the upper epidermis. a. Typical ascoma wall (R. Kirschner 3613). b. Ascoma being atypical by basal stroma-like cells probably surrounding a vascular bundle (R. Kirschner 3945). c, d. Fresh asci and ascospores (R. Kirschner 3613). e. Ascospores germinating after 1 day on malt extract agar (R. Kirschner 3613). Scale bars: a, b, e = 40 µm, c, d = 10 µm.
FIGURE 2. a–d. Mycosphaerella gleicheniae and Zasmidium dicranopteridis. a–c in Mycosphaerellaceous fungi and new species of Venustosynnema and Zasmidium on ferns and fern allies in Taiwan
FIGURE 2. a–d. Mycosphaerella gleicheniae and Zasmidium dicranopteridis. a–c. Mycosphaerella gleicheniae, habitus of fresh collections. a. Host with leaf spots (R. Kirschner 3981). b. Leaf spot with ascomata (R. Kirschner 3613). c. Transversal leaf section showing two ascomata with asci stained with cotton blue (R. Kirschner 3613). d. Cultures of M. gleicheniae (left, 44 days old) and Z. dicranopteridis (right, 53 days old) on malt extract agar in 9 cm Petri dishes (collection numbers on Petri dishes). Scale bars: b = 7 mm, c = 80 µm.
FIGURE 1 in Mycosphaerellaceous fungi and new species of Venustosynnema and Zasmidium on ferns and fern allies in Taiwan
FIGURE 1. Unrooted Maximum Likelihood tree showing estimated relationships among mycosphaerellaceous species on ferns and other plants based on 5.8S-ITS rDNA sequences (GenBank accession numbers given behind the species names). Bootstrap above 50% (1,000 replicates) are indicated below the nodes. Arrows indicate the positions of Mycosphaerella gleicheniae and Zasmidium dicranopteridis from the same host.
How fern and fern allies respond to heterogeneous habitat
The Yuanjiang dry-hot valley features hot and dry climate, low vegetation and soil degradation. It had lush vegetation in the past, but has become degraded in recent decades. Understanding the interrelationship between species and the habitat is necessary to explain this change. In this study, a link between fern and fern allies - a group that is hypersensitive to environmental factors and their circumstances is constructed. Intensive transects and plots were designed to be proxies for extant fern and fern allies, and their habitats. Fifty years of meteorological records of precipitation and temperature along altitude and river running direction (latitudinal) were employed. Alpha and beta diversity are used to access diversity. Species_estimated, Singletons, Uniques, ACE, ICE, and Chao2, which associate to abundance and rarity, are subscribed to the correlation between fern and fern allies, and their ecosystem. Eight species, <i>Selaginella pseudopaleifera, Aleuritopteris squamosa, Adiantum malesianum, Pteris vittata, Davallia trichomanoides, Sinephropteris delavayi, Selaginella jugorum, </i>and<i> Lygodium japonicum </i>are used as indicators of a typical xeric and sun-drying habitat. The results indicate (1) accompanied by dramatically shrinking habitats, fern and fern allies are in very low diversity and abundance, whereas the rarity is relatively high; (2) for fern and fern allies, environmental factors are positive when altitude goes up; and (3) eight indicator species are latitudinally correlated with fern and fern allies along the river running direction.
How fern and fern allies respond to heterogeneous habitat
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