Chapter 16 C4 Photosynthesis Origins in the Monocots: A Review and Reanalysis

Roalson, Eric H.

doi:10.1007/978-90-481-9407-0_16

Cited by 5 publications

(4 citation statements)

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“…Members of Cleomaceae are the closest C4 relatives to the model plant Arabidopsis. This important photosynthetic pathway increases photosynthetic efficiency under certain conditions and impacts angiosperm diversification, biogeography, and community assembly (Brown & al., 2005(Brown & al., , 2011Roalson, 2007Roalson, , 2008Roalson, , 2011Roalson, , 2012Christin & al., 2008;Besnard & al., 2009;. Gynandropsis gynandra is the beststudied C4 species in Cleomaceae, although additional C4 and C3-C4 intermediate species exist (Marshall & al., 2007;Voznesenskaya & al., 2007;Koteyeva & al., 2011).…”

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confidence: 99%

Resolved phylogeny of Cleomaceae based on all three genomes

Patchell

Roalson

Hall

2014

TAXON

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Cleomaceae is a small pantropical family that is emerging as a promising system to investigate C4 photosynthesis, floral evolution, and comparative genomics. However, our understanding of these phenomena is hindered by a lack of a strong phylogenetic hypothesis, despite a number of previous studies. We reconstructed the phylogeny of the family using data from all three genomes, including three cpDNA (ndhF, matK, ycf1), one mtDNA (rps3), and one nrDNA (ITS) regions. Analyses strongly supported 15 clades: (1) Clade 1, which includes two Old World species, Cleome khorassanica and C. turkmena; (2) Cleome s.str., which includes the type C. ornithopodioides and Old World species; (3) Droserifolia, corresponding to three Old World species, C. droserifolia, C. fimbriata, C. quinquenervia; (4) Polanisia, equivalent to this New World genus; (5) Angustifolia, which includes four Old World species; (6) North American cleomoids, which includes four genera, Cleomella, Peritoma, Oxystylis, and Wislizenia; (7) Australian, which includes Old world species and worldwide weed Arivela viscosa; (8) Gynandropsis, equivalent to this monotypic genus; (9) Clade 6, which includes Old World species of Cleome and Dipterygium; (10) Dactylaena, corresponding to this genus and Physostemon; (11) African, which includes species distributed in Old World; (12) Andean, which includes Podandrogyne and tropical New World species of Cleome; (13) Melidiscus, which includes New World tropical species; (14) Cleoserrata, which includes New World tropical species; and (15) Tarenaya, a large New World clade. Major relationships amongst the clades are strongly supported for the first time, including North American cleomoids sister to all remaining Cleomaceae. While five genera are confirmed or newly identified here to be non‐monophyletic (Cleome, Cleomella, Hemiscola, Peritoma, Tarenaya), six are supported (Cleoserrata, Dactylaena, Melidiscus, Physostemon, Podandrogyne, Polanisia). Thus, there are many taxonomic and evolutionary implications to our revised phylogenetic hypothesis.

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Section: Discussionmentioning

confidence: 99%

Resolved phylogeny of Cleomaceae based on all three genomes

Patchell

Roalson

Hall

2014

TAXON

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“…However, despite extensive studies, the evolutionary history of the C 4 trait is still hotly debated in some clades, including the grass family (Poaceae), which is the most important C 4 family, containing about 60% of all C 4 species ( Sage, 2004 ) and many C 4 crops such as maize, sorghum, or sugarcane. Consequently, the reconstruction of photosynthetic transitions in grasses is problematic and has led to contrasting results according to species sampling and reconstruction methods, ranging from a predominance of C 4 gains over C 4 to C 3 reversals ( Giussani et al, 2001 ;Christin et al, 2008 ;Roalson, in press) to a very small number of C 4 origins followed by many losses ( Duvall et al, 2003 ;Edwards and Still, 2008 ). The phylogenetic information available for grasses is constantly increasing and shows that many C 4 clades are separated by C 3 clades ( Giussani et al, 2001 ;Duvall et al, 2003 ;Christin et al, 2008 ;Vicentini et al, 2008 ;Ibrahim et al, 2009 ).…”

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“…The phylogenetic information available for grasses is constantly increasing and shows that many C 4 clades are separated by C 3 clades ( Giussani et al, 2001 ;Duvall et al, 2003 ;Christin et al, 2008 ;Vicentini et al, 2008 ;Ibrahim et al, 2009 ). Consequently, the reconstruction of photosynthetic transitions in grasses is problematic and has led to contrasting results according to species sampling and reconstruction methods, ranging from a predominance of C 4 gains over C 4 to C 3 reversals ( Giussani et al, 2001 ;Christin et al, 2008 ;Roalson, in press) to a very small number of C 4 origins followed by many losses ( Duvall et al, 2003 ;Edwards and Still, 2008 ). Some other studies concluded to a complex history of multiple C 4 appearances, followed by C 4 to C 3 reversals and secondary C 4 reacquisitions ( Vicentini et al, 2008 ;Bouchenak-Khelladi et al, 2009 ).…”

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Two independent C₄ origins in Aristidoideae (Poaceae) revealed by the recruitment of distinct phosphoenolpyruvate carboxylase genes

Christin

Besnard

2009

American J of Botany

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Determining the number of evolutions of an adaptive novelty is primordial to understand its evolutionary significance. C(4) photosynthesis, an adaptation to low CO(2) atmospheric concentration and high temperature, evolved multiple times, but the number of convergent evolutions is still debated. In Poaceae phylogeny, numerous C(4) groups are separated by C(3) taxa, but whether these correspond to independent C(4) origins or a few C(4) evolutions followed by reversals is controversial. The Aristidoideae subfamily is formed by two C(4) genera, Aristida and Stipagrostis, separated by the C(3) genus Sartidia. In the current study, we investigated the evolutionary history of genes encoding phosphoenolpyruvate carboxylases (PEPC) to shed light on the photosynthetic transitions that occurred in Aristidoideae. We identified six distinct PEPC gene lineages that appeared through several rounds of gene duplications before or early during grass diversification. The gene lineage encoding the C(4) PEPC of Stipagrostis differs from those of the other C(4) grasses, including Aristida. These distinct origins of C(4) PEPC genes from these two Aristidoideae genera unequivocally indicate that they integrated the C(4) pathway independently. This highlights the importance of candidate-gene studies when inferring the evolutionary history of a character such as C(4) photosynthesis, one of the greatest evolutionary successes in plant history.

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“…In future work it might be useful to compare various phylogenetic approaches. An alternative to the estimated rates approach used here might be an actual tally of inferred transitions, using stochastic mapping ( Bollback, 2006 ; for implementation in grasses see Roalson, 2011 ) or parsimony reconstruction. Another might be to simply compare the fit of a suite of character evolution models and choose the best-fit model with likelihood scores.…”

Section: Discussionmentioning

confidence: 99%