Leaflet Anatomical Diversity in Zamia (Cycadales: Zamiaceae) Shows Little Correlation with Phylogeny and Climate
Leaflet Anatomical Diversity in Zamia (Cycadales: Zamiaceae) Shows Little Correlation with Phylogeny and Climate
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扎米亚(苏铁目:扎米亚科)的传单解剖多样性与系统发育和气候几乎没有相关性
DOI:
10.1007/s12229-021-09272-0
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Specht, Chelsea D.
中科院分区:
文献类型:
--
作者:
Glos, Rosemary A.;Salzman, Shayla;Calonje, Michael;Vovides, Andrew P.;Coiro, Mario;Gandolfo, Maria Alejandra;Specht, Chelsea D.
Cycads (Cycadales) are among the most ancient lineages of extant seed-bearing plants and are the most threatened plant order on Earth, with circa 75% of the 356 accepted species endangered or threatened with extinction.Zamiais the most species-rich (81 spp.) and widely distributed cycad genus in the Americas, notable for its morphological and ecological diversity. Across the genus, there appears to be a high degree of convergence among macromorphological traits, with many characters that are useful for species identification proving uninformative for elucidating relationships among species. However, it remains unknown whether anatomical variation in leaflet structure corresponds with phylogenetic or geographic patterns, as has been investigated inDioonandCycas.Here, we present a broad comparative survey of leaflet anatomy acrossZamiaspecies with the goals of describing anatomical diversity and uncovering diagnostic characters for resolved clades. Anatomical characters were scored based on the literature and newly prepared sections of leaflets from 20Zamiaspecies plus the outgroup speciesMicrocycas calocoma.The resulting matrix covers 39Zamiaspecies representing all five major clades and spanning the geographic distribution of the genus. Anatomical characters scored from leaflet sections were mapped onto a previously published phylogeny and evaluated for their phylogenetic signal. Most anatomical characters examined are not diagnostic for clades, but newly reported mesophyll sclereids may be unique to one large lineage. Given the widespread incongruence between phylogenetic relationships and the distribution of anatomical traits, we tested the relationship between anatomical characters and environmental signals but did not uncover significant correlations between anatomy and ecology. While further work is required to elucidate the evolutionary history of anatomical characters in this genus, this research improves our understanding of micromorphological character evolution, anatomical diversity, and phylogenetic relationships within this highly threatened lineage of plants.
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影响因子:
2.4
作者:
A. Vovides;K. Norstog;Priscilla K. S. Fawcett;M. Duncan;R. Nash;D. Molsen
通讯作者:
D. Molsen
DOI:
--
发表时间:
2013
期刊:
INTERNATIONAL JOURNAL PLANT SCIENCES
影响因子:
--
作者:
M. A. Pérez‐Farrera;A. Vovides;Sergio Avendaño
通讯作者:
Sergio Avendaño
DOI:
--
发表时间:
1983
期刊:
影响因子:
--
作者:
A. Vovides
通讯作者:
A. Vovides
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
Rafael H. Acuña;Walter Marín
通讯作者:
Walter Marín
DOI:
--
发表时间:
1981
期刊:
影响因子:
--
作者:
K. Norstog
通讯作者:
K. Norstog