中国(竹思)簩竹属(Schizostachyum Nees)的研究及其它

对国产(竹思)(竹劳)竹属(Schizostachyum Nees)进行了系统整理。对属的范围进行了修订,认为本属应包括乔草竹属(Dendrochloa Parkinson),薄竹属(Leptocanna Chia et H.L.Fung),长穗竹属(Teinostachyum Munro)和李海竹属(Neohouzeaua A.Camus),并首次建立了本属的属下分类系统。此外,对二种竹子起了新名:甲竹(Bambusa austro-sinensis Xia)和毛环单竹(B.yunnanensis Xia);作了4个新组合,即Schizostachyum coradatum(Wen et Dai)Xia, S.dumetorum(Hance)Munro var.xinwuense(Wen et J. Y Chin)Xia, Bambusa glaucescens glaucescens(Willd)Sieb. ex Munro var.annulata(W.T.Lin et Z.J.Feng)Xia和B.glaucescens (Willd)Sieb.ex Munro var.pubivagina(W.T....     

斑苦竹学名的订正

作者研究了斑苦竹后认为, 当斑苦竹组合到青篱竹属Arundinaria 时, 其合法双名应为Arundinaria oleosa (Wen)C.S.Chao et G.Y.Yang。而Arundinaria chinensis C.S.Chao et G.Y.Yang 和Acidosasa lentiginosa W.T.Lin et Z.J.Feng 为斑苦竹的新异名。     

永安竹类植物及其区系研究

经调查,永安天然分布的竹类植物有11属63种(含变种、变型),属种分别占中国总数的28.2%和11.4%,占全省的64.7%和48.8%。其中红舌唐竹、湖南箬竹、毛箨茶秆竹、黄槽毛竹等4种为福建省竹类分布新记录。经类群分析表明,永安竹类植物以单轴散生和复轴混生类型为主,具明显的由丛生竹向散生竹过渡特性,是散生竹类和混生竹类的分布中心。区系地理分析表明,永安竹类植物有5个分布区类型(含亚型),其中东亚成分占首位。     

竹亚科单枝竹属芸香竹花枝和花特征补充描述

繁殖器官在竹类植物的分类学研究中具有重要意义,研究组在广西马山县观察到竹亚科单枝竹属芸香竹正在开花,该文根据观察到的开花状况和采集到的标本解剖观察结果,对其花枝和繁殖器官特征做了详细的中文及拉丁文补充描述。经对比芸香竹与属内已知繁殖器官结构的单枝竹和小花单枝竹的繁殖器官,3个竹种有相同的繁殖器官结构特征,但在小花数目和大小等方面具有差异。繁殖器官比较表明该属竹种的繁殖器官对喀斯特地貌环境有特殊的适应性,也支持依据营养器官差异划分为3个独立竹种。     

Maclurochloa trangdinhensis (Poaceae: Bambusoideae), a new species from northern Vietnam

A clambering bamboo endemic to northern Vietnam is shown to represent a new species, M. trangdinhensis H.N.Nguyen & V.T.Tran (Gramineae: Bambusoideae‐Bambusinae), which is described and illustrated. It is similar to M. tonkinensis in general appearance, but differs by being covered with appressed white hairs, and by auricles lacking or forming a low rim only, smaller leaf blade 20–24 × 2.3–2.5 cm, and smaller glumes 6–7 × 4.0–4.5 mm. A key to all species of the genus is included.     

Characterization of 10 KDA prolamin genes in Phyllostachys aurea (Bambusoideae, Poaceae)

Prolamin is the dominant class of seed storage protein in grasses (Poaceae). Information on the 10 kDa multigene family coding for prolamins characteristic of the bambusoid-oryzoid grasses is limited. Two genes encoding 10 kDa prolamin were cloned and sequenced in the bambusoid species Phyllostachys aurea to assess the sequence diversity of this gene family in the oryzoid-bambusoid grasses. The genes, ~417 bp in length, were 96% similar at the DNA sequence level, differing in 12 base substitutions dispersed throughout the sequence. Eight of these mutations were nonsynonymous, leading to amino acid substitutions in the coding region, and one was nonsense, producing an amber stop codon. One gene had an open reading frame (ORF) of 139 amino acids, while the other gene had a shorter ORF (106 amino acids) due to the presence of a stop codon in the coding region and, thus, represents a pseudogene. Deduced proteins showed amino acid composition similar to that of rice. The study underscores the overall conserved nature of this multigene family and reflects considerable sequence divergence at the DNA and amino acid levels between the Oryza and the Phyllostachys genes. The systematic implication of the data is discussed in light of the inconsistent placement of Oryza in the Bambusoideae or Oryzoideae.     

Micromorphological Study on Leaf Epidermis of Schizostachyum and Its Allies ( Poaceae: Bambusoideae)

Micromorphological characters of leaf epidermis of 16 published species from Schizostachy um Nees and its allies ( including Melocanna Trin. , Pseudostachyum Munro, Leptocanna Chia et H. L. Fung and Cephalostachyum Munro) were examined by both light and scanning electron microscopies. The results indicated that the papillae forms and distributional patterns on the abaxial surface were taxonomically informative at the generic level. The characters of papillae did not support Schiz ostachyum sensu lato; meanwhile, it was supported that Melocanna, Pseudostachyum and Cep halostachyum were better to be treated as separate genera respectively. Furthermore, it seemed to be more appropriate to place Leptocanna chinensis and Schizostachyum sanguineum in Cep halostachyum; and to place Cephalostachyum pergr acile and C1 virgatum in Schizostachy um .     

Use of flowering gene <Emphasis Type="Italic">FLOWERING LOCUS T</Emphasis> (<Emphasis Type="Italic">FT</Emphasis>) homologs in the phylogenetic analysis of bambusoid and early diverging grasses

A nuclear gene, FLOWERING LOCUS T (FT) homolog, was cloned from Phyllostachys meyeri as PmFT. Its putative copy number was estimated as four by Southern blot analysis, and the two copies were completely sequenced. Twenty-seven FT homolog sequences of bambusoid and early diverging grasses comprised 172-bp exons, and 357- to 785-bp introns exhibited 0-58.9% pairwise divergence with six modal levels. Parsimony analyses of the FT homologs rooted at Pharus virescens produced six equally parsimonious trees. In the strict consensus tree, five clades were resolved; they were affected by divergence of the intron region rather than exon region. The basal clade was Puelioideae, followed by Olyreae clade including Oryza sativa. Streptogyneae clade combined the Olyreae clade with terminal sister clades of the Bambuseae, i.e., pantropical bamboos and East Asiatic temperate bamboos. The global topology suggested that FT homologs are significant for resolving the tribe level. However, the phylogeny of FT homologs does not resolve monophyly in Bambusoideae because of intercalary positioning by Streptogyneae clade. We discussed the role of FT homologs in controlling the inflorescence architecture and position of Streptogyneae in the bamboo phylogeny.     

四种刚竹属植物花器官形态描述

该文根据采自华东地区的一些刚竹属植物居群中的可靠花枝标本,结合现场调查和形态解剖观察,描述和增补了白哺鸡竹、瓜水竹、谷雨竹、云和哺鸡竹的花序、假小穗和花部形态特征,并提供了显示花枝外貌和花器官主要特征的照片。瓜水竹的花序呈头序,小花较短,应属于水竹组;而其余3种的花序呈穗状,小花较长,应归隶刚竹组。所有的凭证标本均保存于安徽省广德县林业科学研究所竹类标本室中。     

A New Species of Bambusoideae from Guizhou

One new species of the genus lndocalamus (Bambusoideae) is describedfrom China . It is lndocalamus chishuiensis Y. L. Yang et Hsueh.