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  • noun

Words related to dioon

any cycad of the genus Dioon

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101 presents a diagram of a section of a Dioon edule ovule at the stage of pollination, where the principal features are well represented.
the two varieties of Dioon edule there are a number of disjunct colonies
Dioon edule and its two varieties, edule and angustifolium, are
of Dioon by the complete absence of spines on the leaflet margins.
Dioon is a genus of about 10 species distributed mostly in Mexico,
It appears that Dioon was formerly much more widespread,
other species of Mexican cycads: Dioon edule (Vovides, 1990),
Similar pattern has been observed in Dioon edule (Vovides,
In Dioon, very few arbuscular mycorrhizal fungi (AMF) were observed
In the native habitat of Dioon edule, available phosphorus is 4.
callus formation by Dioon edule (Zamiaceae) seedling roots in vitro.
reproduction of three cycad genera (Cycas, Dioon, and Zamia).
The provisional classification presented is based on a cladistic analysis; and the present authors think that, although certain aspects could be modified by the addition of new information, others - such as the recognition of Cycadaceae with Cycas, Stangeriaceae with Stangeria and Bowenia, and the Zamiaceae with two major clades (the Encephalartoideae, containing Dioon, Encephalartos, Lepidozamia, and Macrozamia; and the Zamiodeae, containing Ceratozamia, Chigua, Microcycas, and Zamia) - would remain unchanged.
The second, suggested by Crane (1988), is based on a cladogram similar to one outlined by Stevenson (1990b) and differs only in the placement of Dioon, which appears as a sister taxon to the rest of the Zamiaceae.
Reviewing the chromosome data for Zamia, Moretti (1990a) points out that the karyotype diversity found in some species parallels the wide variability in phenotypic characters in the genus compared with the low phenotypic variability in the stable karyotypes of Ceratozamia 2n = 16 (12 M + 2 sm + 2 T) and Dioon 2n = 18 (8 M + 8 sm + 2 T).