The environmental context of early angiosperm evolution

2011 ◽  
pp. 39-54
Author(s):  
Else Marie Friis ◽  
Peter R. Crane ◽  
Kaj Raunsgaard Pedersen
Keyword(s):  
Environmental Context ◽  
Angiosperm Evolution ◽  
Early Angiosperm ◽  
Early Angiosperm Evolution

scholarly journals Cabomba as a model for studies of early angiosperm evolution

2011 ◽  
Vol 108 (4) ◽  
pp. 589-598 ◽  
Author(s):  
Aurelie C. M. Vialette-Guiraud ◽  
Michael Alaux ◽  
Fabrice Legeai ◽  
Cedric Finet ◽  
Pierre Chambrier ◽  
...  
Keyword(s):  
Angiosperm Evolution ◽  
Early Angiosperm ◽  
Early Angiosperm Evolution

scholarly journals Prickly waterlily and rigid hornwort genomes shed light on early angiosperm evolution

Nature Plants ◽  
2020 ◽  
Vol 6 (3) ◽  
pp. 215-222 ◽  
Author(s):  
Yongzhi Yang ◽  
Pengchuan Sun ◽  
Leke Lv ◽  
Donglei Wang ◽  
Dafu Ru ◽  
...  
Keyword(s):  
Angiosperm Evolution ◽  
Early Angiosperm ◽  
Early Angiosperm Evolution ◽  
Shed Light

Summary and Implications of the Fossil Plant Record of the Potomac Group

1986 ◽  
Vol 15 ◽  
pp. 162-181
Author(s):  
Leo J. Hickey
Keyword(s):  
Flowering Plants ◽  
Fossil Plant ◽  
Complete Sample ◽  
Angiosperm Evolution ◽  
Early Angiosperm ◽  
Angiosperm Diversification ◽  
History Of ◽  
Initial Radiation ◽  
Angiosperm Pollen ◽  
Early Angiosperm Evolution

Study of the angiosperm pollen and leaf record contained in the sediments of the Potomac Group has elucidated the history of early angiosperm diversification. Although records of angiosperm pollen now extend back to the Barremian in a number of areas (see reviews by Doyle, 1977 and 1978), the Potomac sequence is significant because it provides the longest and most complete sample of data on early angiosperm evolution in a context where the pollen and megafloral records can be examined together with the sedimentology. This has provided an unparalleled opportunity for the development of insights into the ecological and adaptive aspects of the initial radiation of the flowering plants.

scholarly journals Fossil evidence for low gas exchange capacities for Early Cretaceous angiosperm leaves

Paleobiology ◽  
2011 ◽  
Vol 37 (2) ◽  
pp. 195-213 ◽  
Author(s):  
Taylor S. Feild ◽  
Garland R. Upchurch ◽  
David S. Chatelet ◽  
Timothy J. Brodribb ◽  
Kunsiri C. Grubbs ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Early Cretaceous ◽  
Leaf Gas Exchange ◽  
Exchange Capacity ◽  
Basal Angiosperm ◽  
Photosynthetic Gas Exchange ◽  
Angiosperm Evolution ◽  
Early Angiosperm ◽  
Fossil Evidence ◽  
Functional Analyses

The photosynthetic gas exchange capacities of early angiosperms remain enigmatic. Nevertheless, many hypotheses about the causes of early angiosperm success and how angiosperms influenced Mesozoic ecosystem function hinge on understanding the maximum capacity for early angiosperm metabolism. We applied structure-functional analyses of leaf veins and stomatal pore geometry to determine the hydraulic and diffusive gas exchange capacities of Early Cretaceous fossil leaves. All of the late Aptian—early Albian angiosperms measured possessed low vein density and low maximal stomatal pore area, indicating low leaf gas exchange capacities in comparison to modern ecologically dominant angiosperms. Gas exchange capacities for Early Cretaceous angiosperms were equivalent or lower than ferns and gymnosperms. Fossil leaf taxa from Aptian to Paleocene sediments previously identified as putative stem-lineages to Austrobaileyales and Chloranthales had the same gas exchange capacities and possibly leaf water relations of their living relatives. Our results provide fossil evidence for the hypothesis that high leaf gas exchange capacity is a derived feature of later angiosperm evolution. In addition, the leaf gas exchange functions of austrobaileyoid and chloranthoid fossils support the hypothesis that comparative research on the biology of living basal angiosperm lineages reveals genuine signals of Early Cretaceous angiosperm ecophysiology.

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