Details
| Original language | English |
|---|---|
| Pages (from-to) | 718-761 |
| Number of pages | 44 |
| Journal | TAXON |
| Volume | 73 |
| Issue number | 3 |
| Publication status | Published - 25 Jun 2024 |
Abstract
Commonly considered bispecific, Acorus is one of the most phylogenetically isolated angiosperm genera that forms the order Acorales sister to the rest of the monocots. The Acorus calamus group is widely distributed in the Holarctic regions of Eurasia and America and has strong medicinal and other practical uses since prehistoric times. Earlier studies interpreted native diploids and invasive triploids occurring in North America as two species that differed in morphology and distribution ranges. In contrast, diploids, triploids, and tetraploids occurring in Eurasia are commonly interpreted as one species because they reportedly cannot be distinguished in collections. We resolve the controversy over taxonomic concepts between Eurasia and America and provide the first detailed multidisciplinary account of Acorus in temperate Asia. We used plastid and nuclear markers, leaf anatomy, seed micromorphology, pollen stainability, flow cytometry, and direct chromosome counts. Diploids and tetraploids show stable molecular and micromorphological differences. Triploids are their sterile hybrids, with the plastid genome inherited from the diploid parent. Diploids of America and Asia tend to differ in leaf characters. Coadaptative coexistence with pollinating beetles Platamartus jakowlewi and Sibirhelus corpulentus (Kateretidae) is conserved between diploids and tetraploids and over a distance of 4700 km between Japan and Western Siberia. Diploids are self-compatible and can set seeds in the absence of kateretid beetles. Tetraploids are self-incompatible and/or cannot set seeds in the absence of Platamartus and Sibirhelus. Diploids (A. americanus) and tetraploids (A. verus) are two biological species; the former has two subspecies. Acorus calamus should be restricted to triploids; it apparently first evolved in temperate Asia. Diploids mostly occur in much cooler climates than triploids and tetraploids. Accessions of A. verus and A. calamus from tropical Asia are apparently derived from ancient introductions. Our data provide a new framework for the pharmacological use of Acorus.
Keywords
- coadaptation, cryptic species, evolution, hybridization, Kateretidae, monocots, morphology, pollination, polyploidy, sweet flag
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Ecology, Evolution, Behavior and Systematics
- Agricultural and Biological Sciences(all)
- Plant Science
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In: TAXON, Vol. 73, No. 3, 25.06.2024, p. 718-761.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Diploids and tetraploids of Acorus (Acoraceae) in temperate Asia are pseudocryptic species with clear differences in micromorphology, DNA sequences and distribution patterns, but shared pollination biology
AU - Sokoloff, Dmitry D.
AU - Degtjareva, Galina V.
AU - Skaptsov, Mikhail V.
AU - Vislobokov, Nikolay A.
AU - Kirejtshuk, Alexander G.
AU - Sennikov, Alexander N.
AU - Severova, Elena E.
AU - Chepinoga, Victor V.
AU - Samigullin, Tahir H.
AU - Valiejo-Roman, Carmen M.
AU - Smirnov, Sergey V.
AU - Shmakov, Alexander I.
AU - Marchuk, Elena A.
AU - Remizowa, Margarita V.
N1 - Publisher Copyright: © 2024 International Association for Plant Taxonomy.
PY - 2024/6/25
Y1 - 2024/6/25
N2 - Commonly considered bispecific, Acorus is one of the most phylogenetically isolated angiosperm genera that forms the order Acorales sister to the rest of the monocots. The Acorus calamus group is widely distributed in the Holarctic regions of Eurasia and America and has strong medicinal and other practical uses since prehistoric times. Earlier studies interpreted native diploids and invasive triploids occurring in North America as two species that differed in morphology and distribution ranges. In contrast, diploids, triploids, and tetraploids occurring in Eurasia are commonly interpreted as one species because they reportedly cannot be distinguished in collections. We resolve the controversy over taxonomic concepts between Eurasia and America and provide the first detailed multidisciplinary account of Acorus in temperate Asia. We used plastid and nuclear markers, leaf anatomy, seed micromorphology, pollen stainability, flow cytometry, and direct chromosome counts. Diploids and tetraploids show stable molecular and micromorphological differences. Triploids are their sterile hybrids, with the plastid genome inherited from the diploid parent. Diploids of America and Asia tend to differ in leaf characters. Coadaptative coexistence with pollinating beetles Platamartus jakowlewi and Sibirhelus corpulentus (Kateretidae) is conserved between diploids and tetraploids and over a distance of 4700 km between Japan and Western Siberia. Diploids are self-compatible and can set seeds in the absence of kateretid beetles. Tetraploids are self-incompatible and/or cannot set seeds in the absence of Platamartus and Sibirhelus. Diploids (A. americanus) and tetraploids (A. verus) are two biological species; the former has two subspecies. Acorus calamus should be restricted to triploids; it apparently first evolved in temperate Asia. Diploids mostly occur in much cooler climates than triploids and tetraploids. Accessions of A. verus and A. calamus from tropical Asia are apparently derived from ancient introductions. Our data provide a new framework for the pharmacological use of Acorus.
AB - Commonly considered bispecific, Acorus is one of the most phylogenetically isolated angiosperm genera that forms the order Acorales sister to the rest of the monocots. The Acorus calamus group is widely distributed in the Holarctic regions of Eurasia and America and has strong medicinal and other practical uses since prehistoric times. Earlier studies interpreted native diploids and invasive triploids occurring in North America as two species that differed in morphology and distribution ranges. In contrast, diploids, triploids, and tetraploids occurring in Eurasia are commonly interpreted as one species because they reportedly cannot be distinguished in collections. We resolve the controversy over taxonomic concepts between Eurasia and America and provide the first detailed multidisciplinary account of Acorus in temperate Asia. We used plastid and nuclear markers, leaf anatomy, seed micromorphology, pollen stainability, flow cytometry, and direct chromosome counts. Diploids and tetraploids show stable molecular and micromorphological differences. Triploids are their sterile hybrids, with the plastid genome inherited from the diploid parent. Diploids of America and Asia tend to differ in leaf characters. Coadaptative coexistence with pollinating beetles Platamartus jakowlewi and Sibirhelus corpulentus (Kateretidae) is conserved between diploids and tetraploids and over a distance of 4700 km between Japan and Western Siberia. Diploids are self-compatible and can set seeds in the absence of kateretid beetles. Tetraploids are self-incompatible and/or cannot set seeds in the absence of Platamartus and Sibirhelus. Diploids (A. americanus) and tetraploids (A. verus) are two biological species; the former has two subspecies. Acorus calamus should be restricted to triploids; it apparently first evolved in temperate Asia. Diploids mostly occur in much cooler climates than triploids and tetraploids. Accessions of A. verus and A. calamus from tropical Asia are apparently derived from ancient introductions. Our data provide a new framework for the pharmacological use of Acorus.
KW - coadaptation
KW - cryptic species
KW - evolution
KW - hybridization
KW - Kateretidae
KW - monocots
KW - morphology
KW - pollination
KW - polyploidy
KW - sweet flag
UR - http://www.scopus.com/inward/record.url?scp=85191027689&partnerID=8YFLogxK
U2 - 10.1002/tax.13173
DO - 10.1002/tax.13173
M3 - Article
AN - SCOPUS:85191027689
VL - 73
SP - 718
EP - 761
JO - TAXON
JF - TAXON
SN - 0040-0262
IS - 3
ER -