The germination power of orchids (Orchidaceae family) seems to betoo weak due lack of albumen. The study carried out with various treatments including pollination time and GA3 for breaking dormancy and increasing seed germination of orchids. The effect of pollination time (8 periods from January to August) and gibberellic acid (0, 500, 1000 and 1500 mg L-1) were studied on germination of Phalae...

The center of diversity of Argentinean orchids is in the northeast region of the country. Chromosome numbers and karyotype features of 43 species belonging to 28 genera are presented here. Five chromosome records are the first ones at the genus level; these taxa are Aspidogyne kuckzinskii (2n = 42), Eurystyles actinosophila (2n = 56), Skeptrostachys paraguayensis (2n = 46), Stigmatosema polyade...

Orchids are members of the family Orchidaceae, one of the largest families of flowering plants. There are an estimated 20,000 to 25,000 orchid species, which occupy wide ranges of ecological habitats and exhibit highly specialized morphological, structural, and physiological characteristics (Dressler, 1990). In particular, the most spectacular evolution is shown in reproductive biology. The pro...

UNLABELLED PREMISE OF THE STUDY To investigate fungal species identity and diversity in mycorrhizal fungi of order Sebacinales, we developed phylogenetic markers. These new markers will enable future studies investigating species delineation and phylogenetic relationships of the fungal symbionts and facilitate investigations into evolutionary interactions among Sebacina species and their orc...

Five new records of terrestrial and lithophytic orchid species were gathered from Penang Hill, Pulau Pinang, Malaysia namely Bulbophyllum depressum, Goodyera pusilla, Peristylus monticola, Podochilus microphyllus, and Zeuxine gracilis. Checklist of each species is provided and their distribution in Penang Hill is discussed.

Orchids have attracted much attention from researchers, because of their richness species and great ornamental medicinal value. Jiangxi Province, which is located in southeastern China ringed on three sides by mountains, contains many nature reserves harbors large number orchids. Here, we conducted field surveys orchids 35 Jiangxi, using sampling lines plots. We also analyzed the relationship b...

American Journal of Botany 100(12): 1–10, 2013 ; http://www.amjbot.org/ © 2013 Botanical Society of America The establishment and survival of epiphytic orchids depend on factors such as the environmental conditions of the forest that sustain them and, perhaps most importantly, on the presence of appropriate fungi. Because orchid seeds are minute and contain few stored reserves, colonization of ...

Australia is rich in orchid flora with over 1000 native species currently recorded. A significant proportion of Australia’s terrestrial orchids are critically endangered, endangered or threatened. Threats to many orchid species include habitat destruction, degradation and fragmentation from increased urbanisation, overgrazing, altered fire regimes and unfortunately, excessive collecting by orch...