Quaternary climate and environment oscillations have profoundly shaped the population dynamic history geographic distributions of current plants. However, how endangered rare tree species respond to climatic environmental fluctuations in subtropical regions China East Asia still needs elucidation. In this study, we collected 36 natural populations an Magnolia sprengeri Pamp. determine demograph...

Background and aims – Pollination systems often reflect adaptations to specific groups of pollinators, these morphological specialisations have been important in the diversification angiosperms. Here, we study evolution capitulum pollination system pantropical genus Parkia, which comprises 35 species trees distributed largely forests South Central America, Africa, Madagascar, Indo-Pacific. The ...

Abstract— Previous phylogenetic analysis of ITS nrDNA sequence data for Arctotidinae species resolved a strongly supported clade containing all but one the showy annual Arctotis (informally designated Annual Clade). In present study, relationships in Clade were investigated by Bayesian inference and maximum parsimony analyses cpDNA ( trnT-trnL-trnF trnH-psbA ) (ITS) data. The phylogenies notabl...

In Synechocystis 6803 the psbA gene, encoding the Dl polypeptide of the Photosystem II reaction center, belongs to a multigene family with three copies (1). The nucleotide sequence of psbA-1 has been reported (2). We have cloned and seguenced a seconcl psbA gene, psbA-2. front Svnechocvstis 6803. The second copy of psbA i s contained within a 2.1 Kb genomic Hind III fragment. The psbA-2 open re...

Nhằm hỗ trợ bảo tồn đa dạng tài nguyên thực vật, việc phát triển định danh tên khoa học và xác mối quan hệ di truyền của các loài vật là cần thiết nên được ưu tiên hiện cho sự bền vững. Chi Melodinus phân bố rộng rãi ở vùng nhiệt đới cận đới. Do tiềm năng về dược tính chúng mà chi này đã tâm khai thác, do đó nó cung cấp một ví dụ điển hình áp dụng nghiên cứu nhằm phụ vụ công tác thác nguyên. Ng...

Gloeobacter violaceus PCC 7421 is a slow-growing cyanobacterium which lacks thylakoid membranes, but whose five-membered psbA gene family encodes three isoform variants of the PsbA (D1) reaction center protein of Photosystem II. Under standard culture conditions Gloeobacter exhibits photosystem II electron transport, but several clear modifications in the redox potential of key cofactors bound ...

Thirteen species of Friesodielsia Steenis (Annonaceae) and 11 representatives related genera were included in molecular phylogenetic analyses using up to six plastid DNA regions (psbA-trnH, trnL-trnF intergenic spacers; trnL intron; matK, ndhF, rbcL exons). The results support the recognition a new species, F. lalisae Damth., Baka & Chaowasku from Narathiwat, S Thailand, as belonging one two ma...