Results 21 to 30 of about 2,040 (179)

Fresh and Dry Weight Relations Are Predictors of Cycas micronesica Seed Age

Horticulturae, 2020
Cycas micronesica is a foundation species in several Micronesian islands and its seeds have been a historical source of starch for the island residents.
Thomas E. Marler, Christopher A. Shaw
doaj   +1 more source

Discovery of a new sub-population, mapping and updated Red List assessment of the Endangered Cycas beddomei Dyer (Cycadales: Cycadaceae)

Journal of Threatened Taxa, 2015
A new sub-population of Cycas beddomei Dyer (Cycadaceae), hitherto believed to be endemic to the Seshachalam Hills (Tirupati-Kadapa Hills) of Andhra Pradesh is discovered from Velikonda Hills (Nellore-Kadapa districts) of Andhra Pradesh.
B. Ravi Prasad Rao, M. Chennakesavulu Naik, S. Salamma, M. V. Suresh Babu   +3 more
doaj   +3 more sources

New insights into Mesozoic cycad evolution: an exploration of anatomically preserved Cycadaceae seeds from the Jurassic Oxford Clay biota [PDF]

PeerJ, 2017
Most knowledge concerning Mesozoic Era floras has come from compression fossils. This has been augmented in the last 20 years by rarer permineralized material showing cellular preservation.
Alan R.T. Spencer, Russell J. Garwood, Andrew R. Rees, Robert J. Raine, Gar W. Rothwell, Neville T.J. Hollingworth, Jason Hilton   +6 more
doaj   +2 more sources

Toxoplasmocidal and Cytotoxic Activities Guided Isolation and Characterization of an Undescribed Bioflavonoid-di-C-glucoside from Cycas rumphii Miq. Cultivated in Egypt

Plants, 2022
Toxoplasmosis and cancer are serious worldwide diseases, and the available drugs cause serious side effects. Investigation for new alternative therapies from natural sources is now an increasing concern.
Hosam M. El-Seadawy, Kamilia A. Abo El-Seoud, Mona El-Aasr, Haytham O. Tawfik, Amany E. Ragab   +4 more
doaj   +1 more source

Analysis of the extranucleolar ribonucleoprotein particles of Cycas revoluta Thunb. (Cycadaceae) and Ceratozamia mexicana Brongn. (Zamiaceae)

Botan‪ical Sciences, 2022
Background: Nuclear ribonucleoprotein particles play a key role in RNA processing and in the gene expression pathway. Interchromatin granules (GICs) involved in the metabolism of pre-messenger RNA (pre-mRNA) were described in Allium cepa and ...
Lourdes-Teresa Agredano-Moreno, María de Lourdes Segura-Valdez, Jaime Jiménez-Ramírez, Luis-Felipe Jiménez-García   +3 more
doaj   +1 more source

Cycas circinalis Queen Sago, Sago Palm

EDIS, 2007
This document provides a detailed overview of the queen sago (Cycas circinalis), a palm-like shrub known for its slow growth and ornamental appeal. It describes the plant’s physical characteristics, including its dark brown trunk, feathery leaves, and ...
Edward Gilman
doaj   +1 more source

Fighting their last stand? A global analysis of the distribution and conservation status of gymnosperms [PDF]

, 2015
Aim: Gymnosperms are often described as a marginal and threatened group, members of which tend to be out-competed by angiosperms and which therefore preferentially persist at higher latitudes and elevations.
Bigras, Bond, Bowe, Brodribb, Carlquist, Cernusak, Chaw, Coiffard, Collen, Connor, Coomes, Coomes, Davies, Debreczy, Eckenwalder, eFloras, Enright, Ewers, Farjon, Farjon, Farjon, Feuerer, Fridley, Friedman, Gerstner, Gibson, Hastie, Henschel, Hill, Hillebrand, IUCN, Jablonski, Jenkins, Jones, Kozlowski, Kramer, Kreft, Leslie, Lomolino, Lusk, McCain, McCoy, Meyer, Mittelbach, Motomura, Mutke, Pimm, Purvis, Pärtel, R Core Team, Ran, Robinson, Rohde, Roskov, Rumeu, Rybicki, Safi, SAS Institute Inc, Sax, Soltis, Soltis, Sperry, Sperry, Stoffel, Takhtajan, Tang, Tredici, Visser, Wang, Willert, Willert, Williams, Wood, Wood, Wood, Wright, Zhao   +76 more
core   +2 more sources

Optimizing efficient PCR‐amplifiable DNA extraction from herbarium specimens

Applications in Plant Sciences, Volume 11, Issue 3, May-June 2023., 2023
Abstract Premise The objective of this study was to optimize an existing DNA extraction protocol for recalcitrant plant taxa to obtain high‐quality DNA from preserved herbarium tissue suitable for downstream PCR applications. Methods and Results Leaf tissue from 30 diverse plant species was obtained from the U.S. National Arboretum Herbarium.
Fred E. Gouker, Yonghong Guo, Harlan T. Svoboda, Margaret R. Pooler   +3 more
wiley   +1 more source

Fewer chromosomes, more co‐occurring species within plant lineages: A likely effect of local survival and colonization

American Journal of Botany, Volume 110, Issue 4, April 2023., 2023
Abstract Premise Plant lineages differ markedly in species richness globally, regionally, and locally. Differences in whole‐genome characteristics (WGCs) such as monoploid chromosome number, genome size, and ploidy level may explain differences in global species richness through speciation or global extinction. However, it is unknown whether WGCs drive
Igor V. Bartish, Salomé Bonnefoi, Abdelkader Aïnouche, Helge Bruelheide, Mark Bartish, Andreas Prinzing   +5 more
wiley   +1 more source

Does Phytogeography Change with Shifts in Geopolitics? The Curious Case of Cycads in the United States

Diversity, 2020
The United States is currently home to five native cycad species. We provide a discussion on these five cycad species to illuminate how evolutionary and geopolitical processes influence phytogeography and published checklists of threatened plants.
Benjamin E. Deloso, Ulysses F. Ferreras, Thomas E. Marler   +2 more
doaj   +1 more source