CONGRESO
LXV CONGRESSO NACIONAL DE BOTÂNICA
BOTÁNICA
XXXIV ERBOT - Encontro Regional de Botânicos MG, BA, ES 18 A 24 DE OUTUBRO DE 2014 - SALVADOR - BAHIA - BRASIL
Latinoamericano de
Botânica na América Latina: conhecimento, interação e difusão
PHYLOGEOGRAPHIC STUDY OF THE PANTROPICAL
MANGROVE PLANT ACROSTICHUM AUREUM
(PTERIDACEAE)
AUTOR(ES):Takeru Yamakawa;Koji Takayama;Nazre Saleh;Yoshimi
Shinmura;Alison Wee Kim Shan;Takeshi Asakawa;OrlexBaylen
Yllano;SeverinoGarengoSalmo III;Erwin Riyanto Ardli;Nguyen Xuan
Tung;NorhaslindaBinti
Malekal;Onrizal;SankararamasubramanianHalasya;Meenakshisundaram;Sar
awood Sungkaew;Bayu Adjie;KhinKhin Soe;Edward L. Webb;Shigeyuki
Baba;Tadashi Kajita;
INSTITUIÇÃO:
Chiba University -The University of Tokyo -Universiti Putra Malaysia
National University of Singapore -Adventist University of the Philippines
Universiti Malaysia Sabah -Jenderal Soedirman University
Hanoi National University of Education -Ateneo de Manila University
Universitas Sumatera Utara -M.S. Swaminathan Research Foundation
Kasetsart University -Bali Botanic Garden, Indonesia
University of Yangon -University of Ryukyus
Mangrove forest is a unique ecosystem distributed across tropical to
subtropical coasts of the world. Although the range of mangrove distribution
is pantropical, most of its component plant species exclusively distribute
Either in IWP (Indo-West Pacific Ocean region) or AEP (Atlantic-East Pacific
region) region. This bivalent pattern of distribution is not only common
feature is mangrove plants but Also for other sea-dispersal plants, so that
outside researchers thought que the African Continent and East Pacific
region might have Prevented migration by sea-dispersal between IWP and
AEP. This idea may consistent with the presence of an exception in
mangrove plants, Acrostichum aureum L. mangrove fern This has
pantropical distribution, Which May Be Caused by wind dispersal of its
spores. However, two closely related specie, A. speciosum Willd. and A.
danaefolium Langsd. & Fisch., Distribute only in IWP or AEP
respectivamente, even though They also have wind dispersal of spores. To
clarify how A. aureum Achieved pantropical distribution, and how the other
two species do not, we Performed phylogeographic study. Collecting
samples of the three species from 28 Populations of 16 countries world
wide, we Studied nucleotide sequences of intergenic spacer region of an
chloroplast DNA, trnW - trnP haplotype and its distribution over the
distribution range. We used Ceratopteris thalictroides to an outgroup. Our
Analyses detected four haplotypes, two of Them distributed only in IWP,
one only in AEP and the other one in Both IWP and AEP. The presence of
the same haplotype in Both IWP and AEP may Suggests the historical
migration between the two regions. Phylogenetic tree and haplotype
network Suggested the two haplotypes of the IWP Were derived ones,
Which Suggests que the expansion of distribution might happen from AEP to
IWP, Which may also suggest speciation might happen between A.
danaefolium and A. aureum in AEP, then between A. aureum and A.
CONGRESO
LXV CONGRESSO NACIONAL DE BOTÂNICA
BOTÁNICA
XXXIV ERBOT - Encontro Regional de Botânicos MG, BA, ES 18 A 24 DE OUTUBRO DE 2014 - SALVADOR - BAHIA - BRASIL
Latinoamericano de
Botânica na América Latina: conhecimento, interação e difusão
speciosum in IWP. The presence of common haplotypes among different
species in Both IWP and AEP may suggest the cause of introgression or
linage sorting. Although we used limited length of molecular marker, the
results Suggested Clearly the haplotype distribute very wide range, but the
others exclusively distribute only in ESL or the IWP like the other sea plants
dispersal. Perhaps, wind dispersal of spores may historically Contribute to
the formation of distribution range, but not to contemporary gene flow.