A study of collecting robot of conifer cone

1997 ◽  
Vol 8 (2) ◽  
pp. 125-126 ◽  
Author(s):  
Lu Huaimin ◽  
Yu Zunbo ◽  
Liu Jinhao ◽  
Ge Anhua ◽  
Yang Liping
Keyword(s):  
Conifer Cone

scholarly journals Defining the limits of flowers: the challenge of distinguishing between the evolutionary products of simple versus compound strobili

2010 ◽  
Vol 365 (1539) ◽  
pp. 397-409 ◽  
Author(s):  
Paula J. Rudall ◽  
Richard M. Bateman
Keyword(s):  
Seed Plants ◽  
Developmental Genetic ◽  
Versus Compound ◽  
Phylogenetic Reconstructions ◽  
Extant Genus ◽  
Genetic Mechanisms ◽  
Flower Evolution ◽  
Conifer Cone ◽  
Patterning Genes ◽  
Extinct Genus

Recent phylogenetic reconstructions suggest that axially condensed flower-like structures evolved iteratively in seed plants from either simple or compound strobili. The simple-strobilus model of flower evolution, widely applied to the angiosperm flower, interprets the inflorescence as a compound strobilus. The conifer cone and the gnetalean ‘flower’ are commonly interpreted as having evolved from a compound strobilus by extreme condensation and (at least in the case of male conifer cones) elimination of some structures present in the presumed ancestral compound strobilus. These two hypotheses have profoundly different implications for reconstructing the evolution of developmental genetic mechanisms in seed plants. If different flower-like structures evolved independently, there should intuitively be little commonality of patterning genes. However, reproductive units of some early-divergent angiosperms, including the extant genus Trithuria (Hydatellaceae) and the extinct genus Archaefructus (Archaefructaceae), apparently combine features considered typical of flowers and inflorescences. We re-evaluate several disparate strands of comparative data to explore whether flower-like structures could have arisen by co-option of flower-expressed patterning genes into independently evolved condensed inflorescences, or vice versa . We discuss the evolution of the inflorescence in both gymnosperms and angiosperms, emphasising the roles of heterotopy in dictating gender expression and heterochrony in permitting internodal compression.

scholarly journals X-ray Synchrotron Microtomography of a silicified Jurassic Cheirolepidiaceae (Conifer) cone: histology and morphology ofPararaucaria collinsonaesp. nov.

PeerJ ◽  
2014 ◽  
Vol 2 ◽  
pp. e624 ◽  
Author(s):  
David C. Steart ◽  
Alan R.T. Spencer ◽  
Russell J. Garwood ◽  
Jason Hilton ◽  
Martin C. Munt ◽  
...  
Keyword(s):  
X Ray ◽  
Conifer Cone ◽  
Synchrotron Microtomography

Cathaya loehrii , a misnomer for a Pliocene conifer cone

Taxon ◽  
1992 ◽  
Vol 41 (4) ◽  
pp. 721-723 ◽  
Author(s):  
Aljos Farjon
Keyword(s):  
Conifer Cone

The Ancestral Conifer Cone: What Did It Look Like? A Modern Trait-Evolution Approach

2020 ◽  
Vol 181 (9) ◽  
pp. 871-886 ◽  
Author(s):  
Julian Herting ◽  
Thomas Stützel ◽  
Kristina V. Klaus
Keyword(s):  
Trait Evolution ◽  
Conifer Cone ◽  
Evolution Approach
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