By organism › Green plants › Isoetaceae › Isoetes asiatica

Observationobservedoriginal resultmeasured

Claim · model-written summary

Basal and lateral meristems form a continuous single meristem.

Taxon: Isoetes asiatica and Isoetes japonicaIsoetes asiaticaIsoetes japonicat0
Outcome: single meristeme0

Verbatim

t0
“Isoetes asiatica and Isoetes japonica”
✓ located verbatim in the source · title, characters 39–76

e0
“The basal (root‐producing) meristem of the rhizomorph is continuous with the lateral meristem, and both comprise a single meristem.”
✓ located verbatim in the source · abstract, characters 172–303

Title

Basal Meristem and Root Development in Isoetes asiatica and Isoetes japonica

Sun‐Young Yi; Masahiro Kato International Journal of Plant Sciences 2001. doi:10.1086/322942

Other claims from this paper (5)

Observationobservedoriginal resultmeasured

Claim · model-written summary

Basal meristem has organogenetic and thickening attributes.

Taxon: Isoetes asiatica and Isoetes japonicaIsoetes asiaticaIsoetes japonicat0
Outcome: both organogenetic and thickening meristem attributese0

Verbatim

t0
“Isoetes asiatica and Isoetes japonica”
✓ located verbatim in the source · title, characters 39–76

e0
“The basal meristem with a layer of thin initials has both organogenetic and thickening meristem attributes.”
✓ located verbatim in the source · abstract, characters 304–411

Title

Basal Meristem and Root Development in Isoetes asiatica and Isoetes japonica

Sun‐Young Yi; Masahiro Kato International Journal of Plant Sciences 2001. doi:10.1086/322942

Other claims from this paper (5)

Observationobservedoriginal resultmeasured

Claim · model-written summary

Root primordia arise from young derivatives arranged in radial files and have a three-layered apical meristem.

Taxon: Isoetes asiatica and Isoetes japonicaIsoetes asiaticaIsoetes japonicat0
Outcome: root primordiae0

Verbatim

t0
“Isoetes asiatica and Isoetes japonica”
✓ located verbatim in the source · title, characters 39–76

e0
“The root primordia develop from young derivative cells organized in three to four radial fines, and their main body is composed of a three‐layered apical meristem.”
✓ located verbatim in the source · abstract, characters 550–713

Title

Basal Meristem and Root Development in Isoetes asiatica and Isoetes japonica

Sun‐Young Yi; Masahiro Kato International Journal of Plant Sciences 2001. doi:10.1086/322942

Other claims from this paper (5)

Observation Basal and lateral meristems form a continuous single meristem.
Observation Basal meristem has organogenetic and thickening attributes.
Observation Primordia produce derivatives, procambium and root cap but lack cortex and epidermis.
Observation Primordia shift toward the corm surface before becoming roots.
Observation The comparison does not support interpreting the roots as leaf homologues.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Primordia produce derivatives, procambium and root cap but lack cortex and epidermis.

Taxon: Isoetes asiatica and Isoetes japonicaIsoetes asiaticaIsoetes japonicat0
Outcome: primordiae0

Verbatim

t0
“Isoetes asiatica and Isoetes japonica”
✓ located verbatim in the source · title, characters 39–76

e0
“The primordia, unlike the roots, produce a small number of derivative cells as well as a procambium and future root cap, and they do not form a cortex and epidermis.”
✓ located verbatim in the source · abstract, characters 714–879

Title

Basal Meristem and Root Development in Isoetes asiatica and Isoetes japonica

Sun‐Young Yi; Masahiro Kato International Journal of Plant Sciences 2001. doi:10.1086/322942

Other claims from this paper (5)

Observationobservedoriginal resultmeasured

Claim · model-written summary

Primordia shift toward the corm surface before becoming roots.

Taxon: Isoetes asiatica and Isoetes japonicaIsoetes asiaticaIsoetes japonicat0
Outcome: primordia are shifted closer to the corm surfacee0

Verbatim

t0
“Isoetes asiatica and Isoetes japonica”
✓ located verbatim in the source · title, characters 39–76

e0
“Prior to developing into roots, the primordia are shifted closer to the corm surface through further development of cortical tissues from the basal meristem and sloughing of surface cells.”
✓ located verbatim in the source · abstract, characters 880–1068

Title

Basal Meristem and Root Development in Isoetes asiatica and Isoetes japonica

Sun‐Young Yi; Masahiro Kato International Journal of Plant Sciences 2001. doi:10.1086/322942

Other claims from this paper (5)

Observationauthor interpretationoriginal resultmeasured

Claim · model-written summary

The comparison does not support interpreting the roots as leaf homologues.

Taxon: Isoetes asiatica and Isoetes japonicaIsoetes asiaticaIsoetes japonicat0
Outcome: interpretation of the roots as leaf homologuese0

Verbatim

t0
“Isoetes asiatica and Isoetes japonica”
✓ located verbatim in the source · title, characters 39–76

e0
“The comparison seems not to support the interpretation of the roots as leaf homologues.”
✓ located verbatim in the source · abstract, characters 1418–1505

Title

Basal Meristem and Root Development in Isoetes asiatica and Isoetes japonica

Sun‐Young Yi; Masahiro Kato International Journal of Plant Sciences 2001. doi:10.1086/322942

Other claims from this paper (5)

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

I. asiatica with 22 chromosomes formed 11 bivalents.

Taxon: I. asiaticaIsoetes asiaticae0
Outcome: bivalentse0
Value: 11e0

Verbatim

t0
“Isoetes”
✓ located verbatim in the source · title, characters 35–42

e0
“I. asiatica with 2 n = 22, 11 bivalents were detected”
✓ located verbatim in the source · abstract, characters 472–525

Title

Biosystematic studies on the genus Isoetes (Isoetaceae) in Japan. II. Meiotic behavior and REPRODUCTIVE MODE OF EACH CYTOTYPE

Masayuki Takamiya; Mitsuru Watanabe; Kanji Ono American Journal of Botany 1996. doi:10.1002/j.1537-2197.1996.tb13915.x

Other claims from this paper (11)

Observation Hexaploid I. japonica formed 33 bivalents.
Observation Octaploid I. japonica formed 44 bivalents.
Observation Tetraploid I. sinensis formed 22 bivalents.
Observation Hexaploid I. sinensis formed 33 bivalents.
Mechanism Regular meiosis and normal spores suggest sexual reproduction in these cytotypes.
Observation Aneuploid I. japonica formed 43 bivalents and one univalent.
Observation Aneuploid I. sinensis formed 32 bivalents and one univalent.
Observation Both aneuploid cytotypes had nearly regular meiosis and normal-appearing microspores.
Observation Heptaploid I. japonica had 22 bivalents, 33 univalents and irregular meiotic divisions.
Mechanism The heptaploid was inferred to be a sterile hybrid of hexaploid and octaploid I. japonica.
Mechanism Allopolyploidy was inferred to be a significant speciation mechanism in Isoetes.

Observationobservedoriginal resultmeasured

Claim · model-written summary

I. asiatica with 2n = 22 had 11 bivalents.

Taxon: I. asiaticaIsoetes asiaticae0
Outcome: bivalentse0
Value: 11e0

Verbatim

e0
“At diakinesis and/or metaphase I of microspore mother cells in I. asiatica with 2n = 22, 11 bivalents were detected”
✓ located verbatim in the source · abstract, characters 406–521

Title

Biosystematic Studies on the Genus Isoetes (Isoetaceae) in Japan. II. Meiotic Behavior and Reproductive Mode of Each Cytotype

Masayuki Takamiya; Mitsuru Watanabe; Kanji Ono American Journal of Botany 1996. doi:10.2307/2446115

Other claims from this paper (11)

Observation Hexaploid I. japonica formed 33 bivalents.
Observation Octaploid I. japonica formed 44 bivalents.
Observation Tetraploid I. sinensis formed 22 bivalents.
Observation Hexaploid I. sinensis formed 33 bivalents.
Mechanism The regularly meiotic Isoetes cytotypes were inferred to reproduce sexually.
Observation Aneuploid I. japonica formed 43 bivalents and one univalent.
Observation Aneuploid I. sinensis formed 32 bivalents and one univalent.
Observation Meiosis of both aneuploid cytotypes was nearly regular and yielded normal appearing microspores.
Observation Heptaploid I. japonica had 22 bivalents and 33 univalents and irregular meiosis.
Observation The heptaploid I. japonica was inferred to be a sterile hybrid with genomic formula AABBCDE.
Mechanism Allopolyploidy was proposed as a significant Isoetes speciation mechanism.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Isoetes asiatica spermatozoids had nearly the same general structure as those of Isoetes japonica but were smaller.

Taxon: Isoetes asiaticaIsoetes asiaticae0
Organ / stage: spermatozoide0
Outcome: general structure of the spermatozoide0
Direction: smallere0
Comparator: Isoetes japonicae0

Verbatim

e0
“The general structure of the spermatozoid of Isoetes asiatica is almost the same as that of Isoetes japonica, but the former is somewhat the smaller”
✓ located verbatim in the source · abstract, characters 3–151

Title

Studies in the Cytology of Pteridophyta

Akira Yuasa Shokubutsugaku Zasshi 1941. doi:10.15281/jplantres1887.55.112

Other claims from this paper (7)

Observationobservedoriginal resultmeasured

Claim · model-written summary

Most Isoetes asiatica spermatozoids bore eight cilia on one side of the cilia-bearing portion, with two directed forward and six backward.

Taxon: Isoetes asiaticaIsoetes asiaticae0
Organ / stage: spermatozoide0
Outcome: bears eight cilia in most cases on one side of the surface of the cilia-bearing portion. Two cilia out of eight go forwards, while the remaining six go rearwardse0
Value: eight ciliae0

Not reportedDirection

Verbatim

e0
“The spermatozoid of Isoetes asiatica bears eight cilia in most cases on one side of the surface of the cilia-bearing portion. Two cilia out of eight go forwards, while the remaining six go rearwards”
✓ located verbatim in the source · abstract, characters 155–353

Title

Studies in the Cytology of Pteridophyta

Akira Yuasa Shokubutsugaku Zasshi 1941. doi:10.15281/jplantres1887.55.112

Other claims from this paper (7)

Isoetes asiatica 16 claims

16 claims