Male Cone Evolution in Conifers : Not All That Simple

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2014
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Schulz, Christian
Klaus, Kristina Vanessa
Knopf, Patrick
Mundry, Marcus
Stützel, Thomas
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American Journal of Plant Sciences. 2014, 5(18), pp. 2842-2857. ISSN 2158-2742. eISSN 2158-2750. Available under: doi: 10.4236/ajps.2014.518300
Zusammenfassung

Despite the simple structure of male conifer cones, there is an enormous variability in cone properties observed upon more careful examination. The diversity ranges from simple cones to compound cones. Moreover, cones can be distinguished according to different spatial distributions on the tree. Simple cones are distributed either as solitary cones or as fascicular or clustered aggregations, while compound cones only exhibit fascicular or clustered aggregations. Here, we demonstrate that these different spatial distribution patterns correlate with distinct leaf types and variable branching frequencies. Furthermore, we provide new insights into the evolution of the sporangiophore, particularly in Taxaceae. Two notably important and fast-evolving characters of conifers are the number of sporangia per sporangiophore and the number of sporangiophores per cone. We demonstrate, across many species and types of cones, how these characters are able to adjust according to the optimal amount of pollen.

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Fachgebiet (DDC)
570 Biowissenschaften, Biologie
Schlagwörter
Pollen Cone, Phylogeny, Gymnosperms, Compound Cone, Microsporophyll
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Zitieren
ISO 690SCHULZ, Christian, Kristina Vanessa KLAUS, Patrick KNOPF, Marcus MUNDRY, Veit DÖRKEN, Thomas STÜTZEL, 2014. Male Cone Evolution in Conifers : Not All That Simple. In: American Journal of Plant Sciences. 2014, 5(18), pp. 2842-2857. ISSN 2158-2742. eISSN 2158-2750. Available under: doi: 10.4236/ajps.2014.518300
BibTex
@article{Schulz2014Evolu-38950,
  year={2014},
  doi={10.4236/ajps.2014.518300},
  title={Male Cone Evolution in Conifers : Not All That Simple},
  number={18},
  volume={5},
  issn={2158-2742},
  journal={American Journal of Plant Sciences},
  pages={2842--2857},
  author={Schulz, Christian and Klaus, Kristina Vanessa and Knopf, Patrick and Mundry, Marcus and Dörken, Veit and Stützel, Thomas}
}
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