Evidence for an ancient whole genome duplication in the cycad lineage. [PDF]
PLoS ONE, 2017 Contrary to the many whole genome duplication events recorded for angiosperms (flowering plants), whole genome duplications in gymnosperms (non-flowering seed plants) seem to be much rarer.
Danielle Roodt +5 more
doaj +10 more sources
Phylogenomics and coalescent analyses resolve extant seed plant relationships. [PDF]
PLoS ONE, 2013 The extant seed plants include more than 260,000 species that belong to five main lineages: angiosperms, conifers, cycads, Ginkgo, and gnetophytes. Despite tremendous effort using molecular data, phylogenetic relationships among these five lineages ...
Zhenxiang Xi +2 more
doaj +7 more sources
Phylogenomic Inference Suggests Differential Deep Time Phylogenetic Signals from Nuclear and Organellar Genomes in Gymnosperms [PDF]
PlantsThe living gymnosperms include about 1200 species in five major groups: cycads, ginkgo, gnetophytes, Pinaceae (conifers I), and cupressophytes (conifers II).
Yu-En Lin +3 more
doaj +2 more sources
Free Sugar Profile in Cycads [PDF]
Frontiers in Plant Science, 2014 The sugars fructose, glucose, maltose, and sucrose were quantified in seven tissues of Zamia muricata Willd. to determine their distribution throughout various organs of a model cycad species, and in lateral structural roots of 18 cycad species to ...
Thomas Edward Marler, Anders eLindstrom
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The Systematics and Evolution of Gymnosperms with an Emphasis on a Few Problematic Taxa [PDF]
PlantsGymnosperms originated in the Middle Devonian and have experienced a long evolutionary history with pulses of speciation and extinction, which resulted in the four morphologically distinct extant groups, i.e., cycads, Ginkgo, conifers and gnetophytes ...
Yong Yang, Zhi Yang, David Kay Ferguson
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Luthrodes pandava Larvae Can Distinguish Cycas Leaf Quality in Cafeteria Experiments [PDF]
InsectsCycads are being endangered by several anthropogenic threats, and invasions of non-native herbivores are among those threats. Various country invasions by the cycad blue butterfly Luthrodes pandava have threatened the local horticulture cycad trade and ...
Thomas E. Marler
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Assessing the extinction risk of Veracruz cycads [PDF]
Cambridge Prisms: ExtinctionCycads, an ancient lineage, face a higher threat of extinction than any other plant group. To address this urgent issue, a more comprehensive method for assessing extinction threat, the Conservation and Prioritization Index (CPI), is proposed and tested ...
Jorge Antonio Gómez Díaz
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Disparity of cycad leaves dispels the living fossil metaphor [PDF]
Communications BiologyThe living fossil metaphor is tightly linked with the cycads. This group of gymnosperms is supposed to be characterised by long-term morphological stasis, particularly after their peak of diversity and disparity in the Jurassic.
Mario Coiro, Leyla Jean Seyfullah
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Retracing origins of exceptional cycads in botanical collections to increase conservation value
Plants People Planet, 2021 Natalie Eva Iwanycki Ahlstrand +1 more
exaly +2 more sources
Chemical ecology of symbioses in cycads, an ancient plant lineage [PDF]
New PhytologistShayla Salzman +2 more
exaly +2 more sources