Results 21 to 30 of about 5,096 (214)

New fossil records of Ceratozamia (Zamiaceae, Cycadales) from the European Oligocene and lower Miocene

open access: yesActa Palaeobotanica, 2014
New compression leaf material of Ceratozamia (Zamiaceae) has been recognised in the European Cenozoic. A leaflet of Ceratozamia floersheimensis (Engelhardt) Kvaček was recovered among unidentified material from the Oligocene of Trbovlje, former Trifail ...
Kvaček Zlatko
doaj   +1 more source

EST analysis in Ginkgo biloba: an assessment of conserved developmental regulators and gymnosperm specific genes [PDF]

open access: yes, 2005
Background: Ginkgo biloba L. is the only surviving member of one of the oldest living seed plant groups with medicinal, spiritual and horticultural importance worldwide.
Brenner, E. D.   +10 more
core   +1 more source

Ginkgo biloba’s footprint of dynamic Pleistocene history dates back only 390,000 years ago [PDF]

open access: yes, 2018
Background: At the end of the Pliocene and the beginning of Pleistocene glaciation and deglaciation cycles Ginkgo biloba went extinct all over the world, and only few populations remained in China in relict areas serving as sanctuary for Tertiary relict ...
Fu, Cheng-Xin   +7 more
core   +1 more source

The complete chloroplast genome of Microcycas calocoma (Miq.) A. DC. (Zamiaceae, Cycadales) and evolution in Cycadales [PDF]

open access: yesPeerJ, 2020
Cycadales is an extant group of seed plants occurring in subtropical and tropical regions comprising putatively three families and 10 genera. At least one complete plastid genome sequence has been reported for all of the 10 genera except Microcycas ...
Aimee Caye G. Chang   +7 more
doaj   +2 more sources

Eobowenia gen. nov. from the early Cretaceous of Patagonia: indication for an early divergence of Bowenia? [PDF]

open access: yes, 2017
Background: Even if they are considered the quintessential "living fossils", the fossil record of the extant genera of the Cycadales is quite poor, and only extends as far back as the Cenozoic.
Coiro, Mario, Pott, Christian
core   +2 more sources

Characterization of the complete chloroplast genome of Cycas hongheensis (Cycadaceae), an endemic species in the red river region of China

open access: yesMitochondrial DNA. Part B. Resources, 2021
In this study, we determined the complete chloroplast genome of Cycas hongheensis (Cycadaceae), one of the first-class protected plants in China. The chloroplast genome is 162,048 bp in length with 133 genes, including 87 protein-coding genes, eight ...
Li-Xin Wu, Yue-Hua Wang, Xun Gong
doaj   +1 more source

Zamia inermis, the more threatened cycad of Mexico [PDF]

open access: yes, 2017
Zamia inermis (Zamiaceae) es una cícada rara, endémica y actualmente listada en Peligro Crítico de Extinción. De la misma, sólo se conoce una población compuesta de tres subpoblaciones, que se encuentra distribuido en tan sólo 2,5 km2 de pastizales y ...
Iglesias Andreu, Lourdes Georgina   +3 more
core   +2 more sources

On the armored scales, genus Aulacaspis Cockerell (Hemiptera: Diaspididae), of Korea [PDF]

open access: yes, 2013
Aulacaspis difficilis (Cockerell) and Aulacaspis latissima (Cockerell), occurring on Elaeagnus glabra Thunb. and Distylium racemosum Siebold and Zucc. (Elaeagnaceae), are newly recorded in the Korean fauna of armored scales (Hemiptera: Diaspididae).
Suh, Soo-Jung
core   +2 more sources

Carbohydrates, pollinators, and cycads [PDF]

open access: yesCommunicative & Integrative Biology, 2015
Cycad biology, ecology, and horticulture decisions are not supported by adequate research, and experiments in cycad physiology in particular have been deficient. Our recent report on free sugar content in a range of cycad taxa and tissues sets the stage for developing continued carbohydrate research. Growth and development of cycad pollen, mediation of
Marler, Thomas E, Lindström, Anders J
openaire   +2 more sources

Climate Predictions Accelerate Decline for Threatened Macrozamia Cycads from Queensland, Australia

open access: yesBiology, 2012
Changes in the potential habitat of five allopatric species of threatened Macrozamia cycads under scenarios of increased ambient temperature were examined.
Paul I. Forster, Melinda J. Laidlaw
doaj   +1 more source

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