From Wikipedia, the free encyclopedia
Genus of hornworts
Leiosporoceros dussii
is the only species in the
hornwort
genus
Leiosporoceros
. The species is placed in a separate family, order, and
class
for being "
genetically
and
morphologically
distinct from all other hornwort lineages."
[3]
Cladistic
analysis of genetic data supports a position at the very base of the hornwort clade.
[4]
Physical characteristics that distinguish the group include unusually small
spores
that are
monolete
and unornamented. Additionally, there are unique strands of
Nostoc
(
cyanobacteria
) that grow inside the plant parallel with its direction of growth. Unlike other hornworts with symbiotic cyanobacteria that enters through mucilage clefts, the mucilage clefts in Leiosporoceros is only present in young plants and then closes permanently once the cyanobacterial colonies have been established. Also
mycorrhiza
and
pyrenoids
are absent.
[5]
[6]
Male plants have been found in Panama.
[2]
References
[
edit
]
- ^
a
b
Hassel de Menendez, Gabriela G. (1986). "
Leiosporoceros
Hassel n. gen. and Leiosporocerotaceae n. fam. of Anthocerotopsida".
Journal of Bryology
.
14
: 255?259.
doi
:
10.1179/jbr.1986.14.2.255
.
- ^
a
b
Hassel de Menendez, Gabriela G. (1988). "A proposal for a new classification of the genera within the Anthocerotophyta".
Journal of the Hattori Botanical Laboratory
.
64
: 71?86.
- ^
Duff, R. Joel; Juan Carlos Villarreal; D. Christine Cargill; Karen S. Renzaglia (2007). "Progress and challenges toward a phylogeny and classification of the hornworts".
The Bryologist
.
110
(2): 214?243.
doi
:
10.1639/0007-2745(2007)110[214:PACTDA]2.0.CO;2
.
- ^
Leebens-Mack, James H.; Barker, Michael S.; Carpenter, Eric J.; Deyholos, Michael K.; Gitzendanner, Matthew A.; Graham, Sean W.; Grosse, Ivo; Li, Zheng; Melkonian, Michael; Mirarab, Siavash; Porsch, Martin; Quint, Marcel; Rensing, Stefan A.; Soltis, Douglas E.; Soltis, Pamela S. (October 2019).
"One thousand plant transcriptomes and the phylogenomics of green plants"
.
Nature
.
574
(7780): 679?685.
doi
:
10.1038/s41586-019-1693-2
.
ISSN
1476-4687
.
PMC
6872490
.
PMID
31645766
.
- ^
Villarreal, Juan Carlos; Renner, Susanne S. (2012).
"Hornwort pyrenoids, carbon-concentrating structures, evolved and were lost at least five times during the last 100 million years"
.
Proceedings of the National Academy of Sciences of the United States of America
.
109
(46): 18873?18878.
Bibcode
:
2012PNAS..10918873V
.
doi
:
10.1073/pnas.1213498109
.
PMC
3503201
.
PMID
23115334
.
- ^
Advances in understanding of mycorrhizal-like associations in bryophytes
|
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Leiosporoceros dussii
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Leiosporoceros
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Leiosporocerotaceae
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Leiosporocerotales
| |
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Leiosporocerotopsida
| |
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Anthoceros dussii
| |
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