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Sterile-fertile leaf dimorphy and evolution of soral types in Polybotrya (Dryopteridaceae)

The neotropical fern genus Polybotrya has strongly dimorphic sterile and fertile leaves (trophophylls and sporophylls). Sterile-fertile leaf dimorphy involves an ensemble of characteristics and not merely a single feature of the leaf. The reduction of green tissue is the most conspicuous aspect of d... Full description

Journal Title: Systematic botany 1987, Vol.12 (4), p.617-628
Main Author: Moran, R.C
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: Alma/SFX Local Collection
Publisher: Kent, OH: American Society of Plant Taxonomists
ID: ISSN: 0363-6445
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recordid: cdi_crossref_primary_10_2307_2418896
title: Sterile-fertile leaf dimorphy and evolution of soral types in Polybotrya (Dryopteridaceae)
format: Article
creator:
  • Moran, R.C
subjects:
  • ANALISIS DE TEJIDOS
  • ANALYSE DE TISSUS
  • ANATOMIA DE LA PLANTA
  • ANATOMIE VEGETALE
  • Biological and medical sciences
  • Biological taxonomies
  • CITOLOGIA
  • COSTA RICA
  • CYTOLOGIE
  • CYTOLOGY
  • DIFERENCIACION
  • DIFFERENCIATION
  • DIFFERENTIATION
  • ECUADOR
  • EQUATEUR
  • ESTERILIDAD
  • Evolution
  • Ferns
  • FERTILIDAD
  • FERTILITE
  • FERTILITY
  • FILOGENIA
  • Fundamental and applied biological sciences. Psychology
  • GENERA
  • GENRE
  • INFERTILITE
  • INFERTILITY
  • INFLORESCENCE
  • INFLORESCENCES
  • INFLORESCENCIAS
  • Leaves
  • PEROU
  • PERU
  • Petioles
  • PHYLLOTAXY
  • PHYLOGENIE
  • PHYLOGENY
  • PLANT ANATOMY
  • Plant cytology, morphology, systematics, chorology and evolution
  • Plant fertility
  • Plants
  • PTERIDOPHYTA
  • Sporangia
  • TAXONOMIA
  • TAXONOMIE
  • TAXONOMY
  • TISSUE ANALYSIS
  • VENEZUELA
ispartof: Systematic botany, 1987, Vol.12 (4), p.617-628
description: The neotropical fern genus Polybotrya has strongly dimorphic sterile and fertile leaves (trophophylls and sporophylls). Sterile-fertile leaf dimorphy involves an ensemble of characteristics and not merely a single feature of the leaf. The reduction of green tissue is the most conspicuous aspect of dimorphy, but differences also occur in seasonality, duration, orientation, placement, size, color, texture, and venation. The sori of Polybotrya were previously described as acrostichoid, but three types of sori occur in the genus: botryoid, coenosoric, and a new type here termed "amphiacrostichoid." Botryoid sori, which are round and discrete, are considered primitive on the basis of outgroup comparison with other dryopteroid ferns. Coenosoric sori, which are oblong to linear, probably evolved from the botryoid type by basipetal fusion of the sori. Amphiacrostichoid sori developed from a coenosoric ancestor by the expansion of the margins of the receptacle beyond the original adaxial surface. As a result, the receptacle assumed its own adaxial surface and sporangia appeared on both surfaces of the leaf. Coenosoric and amphiacrostichoid sori contain diplodesmic veins that develop from the normal veins of the sterile leaf.
language: eng
source: Alma/SFX Local Collection
identifier: ISSN: 0363-6445
fulltext: fulltext
issn:
  • 0363-6445
  • 1548-2324
url: Link


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titleSterile-fertile leaf dimorphy and evolution of soral types in Polybotrya (Dryopteridaceae)
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descriptionThe neotropical fern genus Polybotrya has strongly dimorphic sterile and fertile leaves (trophophylls and sporophylls). Sterile-fertile leaf dimorphy involves an ensemble of characteristics and not merely a single feature of the leaf. The reduction of green tissue is the most conspicuous aspect of dimorphy, but differences also occur in seasonality, duration, orientation, placement, size, color, texture, and venation. The sori of Polybotrya were previously described as acrostichoid, but three types of sori occur in the genus: botryoid, coenosoric, and a new type here termed "amphiacrostichoid." Botryoid sori, which are round and discrete, are considered primitive on the basis of outgroup comparison with other dryopteroid ferns. Coenosoric sori, which are oblong to linear, probably evolved from the botryoid type by basipetal fusion of the sori. Amphiacrostichoid sori developed from a coenosoric ancestor by the expansion of the margins of the receptacle beyond the original adaxial surface. As a result, the receptacle assumed its own adaxial surface and sporangia appeared on both surfaces of the leaf. Coenosoric and amphiacrostichoid sori contain diplodesmic veins that develop from the normal veins of the sterile leaf.
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languageeng
publisherKent, OH: American Society of Plant Taxonomists
subjectANALISIS DE TEJIDOS ; ANALYSE DE TISSUS ; ANATOMIA DE LA PLANTA ; ANATOMIE VEGETALE ; Biological and medical sciences ; Biological taxonomies ; CITOLOGIA ; COSTA RICA ; CYTOLOGIE ; CYTOLOGY ; DIFERENCIACION ; DIFFERENCIATION ; DIFFERENTIATION ; ECUADOR ; EQUATEUR ; ESTERILIDAD ; Evolution ; Ferns ; FERTILIDAD ; FERTILITE ; FERTILITY ; FILOGENIA ; Fundamental and applied biological sciences. Psychology ; GENERA ; GENRE ; INFERTILITE ; INFERTILITY ; INFLORESCENCE ; INFLORESCENCES ; INFLORESCENCIAS ; Leaves ; PEROU ; PERU ; Petioles ; PHYLLOTAXY ; PHYLOGENIE ; PHYLOGENY ; PLANT ANATOMY ; Plant cytology, morphology, systematics, chorology and evolution ; Plant fertility ; Plants ; PTERIDOPHYTA ; Sporangia ; TAXONOMIA ; TAXONOMIE ; TAXONOMY ; TISSUE ANALYSIS ; VENEZUELA
ispartofSystematic botany, 1987, Vol.12 (4), p.617-628
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0Sterile-fertile leaf dimorphy and evolution of soral types in Polybotrya (Dryopteridaceae)
1Systematic botany
descriptionThe neotropical fern genus Polybotrya has strongly dimorphic sterile and fertile leaves (trophophylls and sporophylls). Sterile-fertile leaf dimorphy involves an ensemble of characteristics and not merely a single feature of the leaf. The reduction of green tissue is the most conspicuous aspect of dimorphy, but differences also occur in seasonality, duration, orientation, placement, size, color, texture, and venation. The sori of Polybotrya were previously described as acrostichoid, but three types of sori occur in the genus: botryoid, coenosoric, and a new type here termed "amphiacrostichoid." Botryoid sori, which are round and discrete, are considered primitive on the basis of outgroup comparison with other dryopteroid ferns. Coenosoric sori, which are oblong to linear, probably evolved from the botryoid type by basipetal fusion of the sori. Amphiacrostichoid sori developed from a coenosoric ancestor by the expansion of the margins of the receptacle beyond the original adaxial surface. As a result, the receptacle assumed its own adaxial surface and sporangia appeared on both surfaces of the leaf. Coenosoric and amphiacrostichoid sori contain diplodesmic veins that develop from the normal veins of the sterile leaf.
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0ANALISIS DE TEJIDOS
1ANALYSE DE TISSUS
2ANATOMIA DE LA PLANTA
3ANATOMIE VEGETALE
4Biological and medical sciences
5Biological taxonomies
6CITOLOGIA
7COSTA RICA
8CYTOLOGIE
9CYTOLOGY
10DIFERENCIACION
11DIFFERENCIATION
12DIFFERENTIATION
13ECUADOR
14EQUATEUR
15ESTERILIDAD
16Evolution
17Ferns
18FERTILIDAD
19FERTILITE
20FERTILITY
21FILOGENIA
22Fundamental and applied biological sciences. Psychology
23GENERA
24GENRE
25INFERTILITE
26INFERTILITY
27INFLORESCENCE
28INFLORESCENCES
29INFLORESCENCIAS
30Leaves
31PEROU
32PERU
33Petioles
34PHYLLOTAXY
35PHYLOGENIE
36PHYLOGENY
37PLANT ANATOMY
38Plant cytology, morphology, systematics, chorology and evolution
39Plant fertility
40Plants
41PTERIDOPHYTA
42Sporangia
43TAXONOMIA
44TAXONOMIE
45TAXONOMY
46TISSUE ANALYSIS
47VENEZUELA
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titleSterile-fertile leaf dimorphy and evolution of soral types in Polybotrya (Dryopteridaceae)
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0ANALISIS DE TEJIDOS
1ANALYSE DE TISSUS
2ANATOMIA DE LA PLANTA
3ANATOMIE VEGETALE
4Biological and medical sciences
5Biological taxonomies
6CITOLOGIA
7COSTA RICA
8CYTOLOGIE
9CYTOLOGY
10DIFERENCIACION
11DIFFERENCIATION
12DIFFERENTIATION
13ECUADOR
14EQUATEUR
15ESTERILIDAD
16Evolution
17Ferns
18FERTILIDAD
19FERTILITE
20FERTILITY
21FILOGENIA
22Fundamental and applied biological sciences. Psychology
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24GENRE
25INFERTILITE
26INFERTILITY
27INFLORESCENCE
28INFLORESCENCES
29INFLORESCENCIAS
30Leaves
31PEROU
32PERU
33Petioles
34PHYLLOTAXY
35PHYLOGENIE
36PHYLOGENY
37PLANT ANATOMY
38Plant cytology, morphology, systematics, chorology and evolution
39Plant fertility
40Plants
41PTERIDOPHYTA
42Sporangia
43TAXONOMIA
44TAXONOMIE
45TAXONOMY
46TISSUE ANALYSIS
47VENEZUELA
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abstractThe neotropical fern genus Polybotrya has strongly dimorphic sterile and fertile leaves (trophophylls and sporophylls). Sterile-fertile leaf dimorphy involves an ensemble of characteristics and not merely a single feature of the leaf. The reduction of green tissue is the most conspicuous aspect of dimorphy, but differences also occur in seasonality, duration, orientation, placement, size, color, texture, and venation. The sori of Polybotrya were previously described as acrostichoid, but three types of sori occur in the genus: botryoid, coenosoric, and a new type here termed "amphiacrostichoid." Botryoid sori, which are round and discrete, are considered primitive on the basis of outgroup comparison with other dryopteroid ferns. Coenosoric sori, which are oblong to linear, probably evolved from the botryoid type by basipetal fusion of the sori. Amphiacrostichoid sori developed from a coenosoric ancestor by the expansion of the margins of the receptacle beyond the original adaxial surface. As a result, the receptacle assumed its own adaxial surface and sporangia appeared on both surfaces of the leaf. Coenosoric and amphiacrostichoid sori contain diplodesmic veins that develop from the normal veins of the sterile leaf.
copKent, OH
pubAmerican Society of Plant Taxonomists
doi10.2307/2418896