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Citation for Study 19921

Citation title: "Not only in the temperate zone: independent gametophytes of two vittarioid ferns (Pteridaceae, Polypodiales) in East Asian subtropics".

Study name: "Not only in the temperate zone: independent gametophytes of two vittarioid ferns (Pteridaceae, Polypodiales) in East Asian subtropics".

This study is part of submission 19921 (Status: Published).

Citation

Kuo L., Chen C., Shinohara W., Ebihara A., Hiroshi K., Hirotoshi S., Huang Y., & Chiou W. 2017. Not only in the temperate zone: independent gametophytes of two vittarioid ferns (Pteridaceae, Polypodiales) in East Asian subtropics. Journal of Plant Research, 130: 407-416.

Authors

• Kuo L. (submitter)
• Chen C. +886912275401
• Shinohara W. +81-75-753-4145
• Ebihara A.
• Hiroshi K.
• Hirotoshi S.
• Huang Y.
• Chiou W.

Abstract

Independent gametophyte ferns are unique among vascular plants because they are sporophyteless and reproduce asexually to maintain their populations in the gametophyte generation. Such ferns had been primarily discovered in temperate zone, and usually hypothesized with (sub)tropical origins and subsequent extinction of sporophyte due to climate change during glaciations. Presumably, independent fern gametophytes are unlikely to be distributed in tropics and subtropics because of relatively stable climates which are less affected by glaciations. Nonetheless, the current study presents cases of two independent gametophytes fern species in subtropic East Asia. In this study, we applied plastid DNA sequences (trnL-LF and matK + ndhF + chlL datasets) and comprehensive sampling (~80 %) of congeneric species for molecular identification and divergence time estimation of these independent fern gametophytes. The two independent gametophyte ferns were found belonging to genus Haplopteris (vittarioids, Pteridaceae) and no genetic identical sporophyte species in East Asia. For one species, divergence times between its populations imply recent oversea dispersal(s) by spores occurred during Pleistocene. By examining their ex situ and in situ fertility, prezygotic sterility was found in these two Haplopteris, in which gametangia were not or very seldom observed, and this prezygotic sterility might attribute to their lacks of functional sporophytes. Our field observation and survey on their habitats suggest microhabitat conditions might attribute to this prezygotic sterility. These findings point to consideration of whether recent climate change during the Pleistocene glaciation resulted in ecophysiological maladaptation of non-temperate independent gametophyte ferns. In addition, we provided a new definition to classify fern gametophyte independences at the population level. We expect that continued investigations into tropical and subtropical fern gametophyte floras will further illustrate the biogeographic significance of non-temperate fern gametophyte independence.

Keywords

East Asia; fern, Haplopteris; independent gametophyte; subtropics; vittarioid.

External links

• DOI: 10.1007/s10265-016-0897-x

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S19921
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref26648,
  	 author = {Li-Yaung  Kuo and Cheng-Wei  Chen and Wataru  Shinohara and Atsushi  Ebihara and Kudoh  Hiroshi and Sato  Hirotoshi  and Yao-Moan  Huang and Wen-Liang  Chiou},
  	 title = {Not only in the temperate zone: independent gametophytes of two vittarioid ferns (Pteridaceae, Polypodiales) in East Asian subtropics},
  	 year = {2017},
  	 keywords = {East Asia; fern, Haplopteris; independent gametophyte; subtropics; vittarioid.},
  	 doi = {10.1007/s10265-016-0897-x},
  	 url = {http://},
  	 pmid = {},
  	 journal = {Journal of Plant Research},
  	 volume = {130},
  	 number = {},
  	 pages = {407--416},
  	 abstract = {Independent gametophyte ferns are unique among vascular plants because they are sporophyteless and
  reproduce asexually to maintain their populations in the gametophyte generation. Such ferns had been
  primarily discovered in temperate zone, and usually hypothesized with (sub)tropical origins and subsequent
  extinction of sporophyte due to climate change during glaciations. Presumably, independent fern
  gametophytes are unlikely to be distributed in tropics and subtropics because of relatively stable climates
  which are less affected by glaciations. Nonetheless, the current study presents cases of two independent
  gametophytes fern species in subtropic East Asia. In this study, we applied plastid DNA sequences (trnL-LF
  and matK + ndhF + chlL datasets) and comprehensive sampling (~80 %) of congeneric species for
  molecular identification and divergence time estimation of these independent fern gametophytes. The two
  independent gametophyte ferns were found belonging to genus Haplopteris (vittarioids, Pteridaceae) and
  no genetic identical sporophyte species in East Asia. For one species, divergence times between its
  populations imply recent oversea dispersal(s) by spores occurred during Pleistocene. By examining their ex
  situ and in situ fertility, prezygotic sterility was found in these two Haplopteris, in which gametangia were
  not or very seldom observed, and this prezygotic sterility might attribute to their lacks of functional
  sporophytes. Our field observation and survey on their habitats suggest microhabitat conditions might
  attribute to this prezygotic sterility. These findings point to consideration of whether recent climate change
  during the Pleistocene glaciation resulted in ecophysiological maladaptation of non-temperate independent
  gametophyte ferns. In addition, we provided a new definition to classify fern gametophyte independences
  at the population level. We expect that continued investigations into tropical and subtropical fern
  gametophyte floras will further illustrate the biogeographic significance of non-temperate fern gametophyte
  independence.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 26648
  AU  - Kuo,Li-Yaung 
  AU  - Chen,Cheng-Wei 
  AU  - Shinohara,Wataru 
  AU  - Ebihara,Atsushi 
  AU  - Hiroshi,Kudoh 
  AU  - Hirotoshi ,Sato 
  AU  - Huang,Yao-Moan 
  AU  - Chiou,Wen-Liang 
  T1  - Not only in the temperate zone: independent gametophytes of two vittarioid ferns (Pteridaceae, Polypodiales) in East Asian subtropics
  PY  - 2017
  KW  - East Asia; fern
  KW  - Haplopteris; independent gametophyte; subtropics; vittarioid.
  UR  - http://dx.doi.org/10.1007/s10265-016-0897-x
  N2  - Independent gametophyte ferns are unique among vascular plants because they are sporophyteless and
  reproduce asexually to maintain their populations in the gametophyte generation. Such ferns had been
  primarily discovered in temperate zone, and usually hypothesized with (sub)tropical origins and subsequent
  extinction of sporophyte due to climate change during glaciations. Presumably, independent fern
  gametophytes are unlikely to be distributed in tropics and subtropics because of relatively stable climates
  which are less affected by glaciations. Nonetheless, the current study presents cases of two independent
  gametophytes fern species in subtropic East Asia. In this study, we applied plastid DNA sequences (trnL-LF
  and matK + ndhF + chlL datasets) and comprehensive sampling (~80 %) of congeneric species for
  molecular identification and divergence time estimation of these independent fern gametophytes. The two
  independent gametophyte ferns were found belonging to genus Haplopteris (vittarioids, Pteridaceae) and
  no genetic identical sporophyte species in East Asia. For one species, divergence times between its
  populations imply recent oversea dispersal(s) by spores occurred during Pleistocene. By examining their ex
  situ and in situ fertility, prezygotic sterility was found in these two Haplopteris, in which gametangia were
  not or very seldom observed, and this prezygotic sterility might attribute to their lacks of functional
  sporophytes. Our field observation and survey on their habitats suggest microhabitat conditions might
  attribute to this prezygotic sterility. These findings point to consideration of whether recent climate change
  during the Pleistocene glaciation resulted in ecophysiological maladaptation of non-temperate independent
  gametophyte ferns. In addition, we provided a new definition to classify fern gametophyte independences
  at the population level. We expect that continued investigations into tropical and subtropical fern
  gametophyte floras will further illustrate the biogeographic significance of non-temperate fern gametophyte
  independence.
  L3  - 10.1007/s10265-016-0897-x
  JF  - Journal of Plant Research
  VL  - 130
  IS  - 
  SP  - 407
  EP  - 416
  ER  -