Results 31 to 40 of about 5,096 (214)

Characterization of the complete chloroplast genome of endangered Cycads Zamia fischeri Miq. ex Lem

Mitochondrial DNA. Part B. Resources, 2018
The whole chloroplast (cp) genome sequence of Zamia fischeri has been characterized. The cp genome length was 164,767 bp in length, with a GC content of 39.7%, containing a large single copy (LSC) of 90,226 bp, a small single copy (SSC) of 23,223 bp, and
Jin-Yan Lei, Damien Daniel Hinsinger, Guo-Feng Jiang   +2 more
doaj   +1 more source

G-fibers and Florin ring-like structures in Dioon (Zamiaceae)

Botan‪ical Sciences, 2016
Cuticle information and epidermal characters have great potential in systematic studies.  However, micromorphology and anatomical studies on cycads are relatively scarce in comparison to similar studies on other gymnosperms.
Andrew P. Vovides, Sonia Galicia
doaj   +1 more source

Hydrophobia of gymnosperms: myth or reality? A global analysis [PDF]

, 2014
According to the classical textbooks, the gymnosperms are the only seed plants without aquatic species. Recently, however, a set of virtually complete compilations on gymnosperms has been published, enabling a new evaluation of the putative hydrophobia ...
Ashraf, Bond, Bowe, Briand, Burger, Chaw, Cook, Cronk, Debreczy, Del Tredici, Eckenwalder, Enright, Ewers, Falcon-Lang, Farjon, Farjon, Feild, Godfrey, Hogarth, Jackson, Jackson, Jaffré, Jones, Kozlowski, Kramer, Laubenfels, McCoy, Morat, Muhammad, Parent, Ran, Raymond, Reed, Sculthorpe, Shearer, Soltis, Sperry, Sperry, Stebbins, Steenis, Stoffel, Tiner, Tomlinson, Vanderpoorten, Vartapetian, Williams, Yamamoto, Zhao   +47 more
core   +2 more sources

The Cycad Genus Cycas May Have Diversified From Indochina and Occupied Its Current Ranges Through Vicariance and Dispersal Events

Frontiers in Ecology and Evolution, 2020
Biogeographically, cycads were once widely distributed but the extant cycads are restricted to tropical and subtropical regions. They originated ∼ 300 Ma and re-diversified recently around 12 Ma, with the genus Cycas being the most rapidly diversified ...
Ledile T. Mankga, Kowiyou Yessoufou, Thendo Mugwena, Munyaradzi Chitakira   +3 more
doaj   +1 more source

Green Plants in the Red: A Baseline Global Assessment for the IUCN Sampled Red List Index for Plants [PDF]

, 2015
Plants provide fundamental support systems for life on Earth and are the basis for all terrestrial ecosystems; a decline in plant diversity will be detrimental to all other groups of organisms including humans. Decline in plant diversity has been hard to
Albuquerque, S, Aletrari, E, Andrews, AK, Atchison, G, Bachman, SP, Baloch, E, Barlozzini, B, Brummitt, NA, Brunazzi, A, Carretero, J, Celesti, M, Chadburn, H, Cianfoni, E, Cockel, C, Coldwell, V, Concetti, B, Contu, S, Crook, V, Donaldson, JS, Dyson, P, Farjon, A, Gardiner, L, Ghanim, N, Greene, H, Griffiths-Lee, J, Groom, A, Harker, R, Hilton-Taylor, C, Hopkins, D, Khela, S, Lakeman-Fraser, P, Lindon, H, Lockwood, H, Loftus, C, Lombrici, D, Lopez-Poveda, L, Lutz, M, Lyon, J, Malcolm-Tompkins, P, McGregor, K, Meagher, TR, Moat, JF, Moreno, L, Murray, L, Nazar, K, Nic Lughadha, EM, Power, E, Quiton Tuijtelaars, M, Salter, R, Segrott, R, Thacker, H, Thomas, LJ, Tingvoll, S, Watkinson, G, Wojtaszekova, K   +54 more
core   +1 more source

Perspectives on Endosymbiosis in Coralloid Roots: Association of Cycads and Cyanobacteria

Frontiers in Microbiology, 2019
Past endosymbiotic events allowed photosynthetic organisms to flourish and evolve in terrestrial areas. The precursor of chloroplasts was an ancient photosynthetic cyanobacterium.
Aimee Caye G. Chang, Aimee Caye G. Chang, Aimee Caye G. Chang, Tao Chen, Nan Li, Jun Duan   +5 more
doaj   +1 more source

Does Size Matter? Atmospheric CO2 May Be a Stronger Driver of Stomatal Closing Rate Than Stomatal Size in Taxa That Diversified under Low CO2 [PDF]

, 2016
One strategy for plants to optimize stomatal function is to open and close their stomata quickly in response to environmental signals. It is generally assumed that small stomata can alter aperture faster than large stomata.
Aasamaa, Badr, Bergman, Berner, Biffin, Biffin, Biffin, Bradbeer, Bremer, Brown, Caird, Cowan, Cowan, Crane, Crisp, Daley, Dawson, Drake, Edwards, Eyles, Franks, Franks, Franks, Hammer, Haworth, Hetherington, Hirano, Jacobs, Jones, Jones, Jud, Katul, Kellogg, Lawson, Lawson, McElwain, McElwain, McElwain, Monda, Montañez, Nagalingum, Paape, Parlange, Parsons, Pearson, Phipps, Piperno, Prasad, R Core Team, Raschke, Robinson, Royer, Ruddiman, Sager, Schneider, Strömberg, Tabor, Treutlein, Vico, Weyers, Whitelock, Wikström, Wolfe, Wong   +63 more
core   +4 more sources

Cycads from the Triassic of Antarctica: Permineralized Cycad Leaves [PDF]

International Journal of Plant Sciences, 2007
Permineralized cycad petioles and/or rachides with associated pinnae are described from two Triassic localities in the Queen Alexandria Range, central Transantarctic Mountains, Antarctica. Petiole‐rachides display an inverted‐omega‐shaped arrangement of vascular bundles typical of most genera of extant Cycadales and exarch primary xylem that link them ...
Hermsen, Elizabeth, Taylor, Thomas N., Taylor, Edith L., Stevenson, Dennis W.   +3 more
openaire   +2 more sources

The Sustainable Development Goals Report 2017 [PDF]

, 2017
The Sustainable Development Goals Report 2017 reviews progress made towards the 17 Goals in the second year of implementation of the 2030 Agenda for Sustainable Development. The reportis based on the latest available data.

core   +1 more source

Cycad-Weevil Pollination Symbiosis Is Characterized by Rapidly Evolving and Highly Specific Plant-Insect Chemical Communication

Frontiers in Plant Science, 2021
Coevolution between plants and insects is thought to be responsible for generating biodiversity. Extensive research has focused largely on antagonistic herbivorous relationships, but mutualistic pollination systems also likely contribute to ...
Shayla Salzman, Shayla Salzman, Damon Crook, Michael Calonje, Dennis W. Stevenson, Naomi E. Pierce, Robin Hopkins   +6 more
doaj   +1 more source