Biology:Chloridoideae
| Chloridoideae | |
|---|---|
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| Finger millet (Eleusine coracana) in Nepal | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Clade: | Commelinids |
| Order: | Poales |
| Family: | Poaceae |
| Clade: | PACMAD clade |
| Subfamily: | Chloridoideae Kunth ex Beilschm. |
| Tribes | |
Chloridoideae is one of the largest subfamilies of grasses, with roughly 150 genera and 1,600 species, mainly found in arid tropical or subtropical grasslands. Within the PACMAD clade, their sister group is the Danthonioideae.[1] The subfamily includes widespread weeds such as Bermuda grass (Cynodon dactylon) or goosegrass (Eleusine indica), but also millet species grown in some tropical regions, namely finger millet (Eleusine coracana) and teff (Eragrostis tef).
With the exception of some species in Ellisochloa and Eleusine indica, most of the subfamily's species use the C4 photosynthetic pathway. The first evolutionary transition from C3 to C4 photosynthesis in the grasses probably occurred in this subfamily, around 32 to 25 million years ago in the Oligocene.[2]
Phylogeny
Relationships of tribes in the Chloridoideae according to a 2017 phylogenetic classification, also showing the Danthonioideae as sister group:[3]
| Chloridoideae |
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The following genera have not been assigned to a tribe:[3]
- Gossweilerochloa
- Indopoa
- Lepturopetium
- Myriostachya
- Pogonochloa
- Pseudozoysia
- Silentvalleya
References
- ↑ Soreng, Robert J.; Peterson, Paul M.; Romschenko, Konstantin; Davidse, Gerrit; Zuloaga, Fernando O.; Judziewicz, Emmet J.; Filgueiras, Tarciso S.; Davis, Jerrold I. et al. (2015). "A worldwide phylogenetic classification of the Poaceae (Gramineae)". Journal of Systematics and Evolution 53 (2): 117–137. doi:10.1111/jse.12150. ISSN 1674-4918.
- ↑ Christin, Pascal-Antoine; Besnard, Guillaume; Samaritani, Emanuela; Duvall, Melvin R.; Hodkinson, Trevor R.; Savolainen, Vincent; Salamin, Nicolas (2008). "Oligocene CO2 Decline Promoted C4 Photosynthesis in Grasses". Current Biology 18 (1): 37–43. doi:10.1016/j.cub.2007.11.058. ISSN 0960-9822. PMID 18160293.
- ↑ 3.0 3.1 Soreng, Robert J.; Peterson, Paul M.; Romaschenko, Konstantin; Davidse, Gerrit; Teisher, Jordan K.; Clark, Lynn G.; Barberá, Patricia; Gillespie, Lynn J. et al. (2017). "A worldwide phylogenetic classification of the Poaceae (Gramineae) II: An update and a comparison of two 2015 classifications". Journal of Systematics and Evolution 55 (4): 259–290. doi:10.1111/jse.12262. ISSN 16744918.
Grasses (Poaceae or Gramineae) | |||||||||||
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| Uses |
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Wikidata ☰ Q133804 entry
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