Results 21 to 30 of about 2,072 (192)

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

Convergent Patterns of Karyotype Evolution Underlying Karyotype Uniformity in Conifers. [PDF]

Adv Sci (Weinh)
The remarkable karyotype uniformity observed in gymnosperms has long posed an evolutionary puzzle. This study proposes a model of karyotype evolution in gymnosperms, highlighting the rarity of both polyploidy and dysploidy as key factors underlying this uniformity.
Zhang RG, Liu H, Shang HY, Shu H, Liu DT, Yang H, Jia KH, Wang XQ, Sun WB, Zhao W, Ma Y.   +10 more
europepmc   +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

Mauritius since the last glacial:environmental and climatic reconstruction of the last 38 000 years from Kanaka Crater [PDF]

, 2011
A 10 m long peat core from the Kanaka Crater (20° 25′ S, 57° 31′ E), located at 560 m elevation in Mauritius, was analyzed for microfossils. Eight radiocarbon ages show the pollen record reflects environmental and climatic change of the last ca.
Baider, Barker, Biber, Bonnefille, Burney, Camoin, Cheke, Coetzee, Cruz, Diamond, Faegri, Gasse, Gasse, Grimm, Grimm, Hannah, Hedberg, Hedberg, Hemp, Hemp, Hoelzmann, Hooghiemstra, Johnson, Kröpelin, Kutzbach, Lambeck, Lorence, Marchant, McDougall, Mumbi, Pokras, Reimer, Rouillard, Ruddiman, Safford, Saji, Straka, Street-Perrot, Stuiver, van Zinderen, Vaughan, Vaughan, Whittaker, Yokoyama, Zinke   +44 more
core   +2 more sources

The Root-Nodules of the Cycadaceae

Annals of Botany, 1915
exaly   +3 more sources