Subjects: Biology >> Botany >> Applied botany submitted time 2024-04-17 Cooperative journals: 《广西植物》
Abstract： The taxonomy of Tacca remains controversial. Schizocapsa guangxiensis is considered to be the same species as T. plantanginea, but some taxonomists classify them into different species based on their morphological differences. In order to clarify the genetic differences and phylogenetic relationship between S. guangxiensis and T. plantanginea, this study conducted high-throughput DNA sequencing of S. guangxiensis, assembled a complete chloroplast genome using bioinformatics software, and compared it with the published T. plantanginea chloroplast genome. The results showed that: (1) The chloroplast genome size of S. guangxiensis and T. plantanginea is 162 149 bp and 160 749 bp, respectively, and they have the same GC content (36.90%). Notably, the gene types and gene amount are exactly the same in these two species, including 89 proteincoding genes and 37 tRNA genes, and 6 rRNA genes. (2) Codon preference analysis shows that there are certain differences in the codon frequencies used by the two species, but they both prefer codons ending in A/T(U). (3) Compared with T. plantanginea, the SSC boundary of S. guangxiensis has obvious expansion, which is the main factor leading to the length variant in chloroplast genome between the two species. (4) There are some sequence divergences between S. guangxiensis and T. plantanginea in the LSC and SSC regions, especially the intergenic region, which can be exploited as species-specific molecular marker. (5) Phylogenetic results show that S. guangxiensis and T. plantanginea have a rather distant genetic relationship. Although S. guangxiensis is placed in Tacca, they belong to two different species. This study enriches the genetic information of the chloroplast genome of S. guangxiensis and provides a theoretical basis for species classification, genetic diversity analysis and species protection of S. guangxiensis.
Subjects: Biology >> Botany >> Applied botany submitted time 2023-12-24 Cooperative journals: 《广西植物》
Abstract： Primulina pingguoensis H.S. Ma & B. Pan, a new species of Gesneriaceae from Guangxi Zhuang Autonomous Region, China, is illustrated and described here. The new species morphologically resembles Primulina carinata Y.G. Wei, F. Wen & H.Z. Lü, but it differs from the latter by lobes narrowly lanceolate-linear，length-width ratio >2 (rounded-ovate，length-width ratio <1.5), 8–10 purple stripes from corolla throat to the bottom of corolla tube, without honey guides (vs. brown stripes, 2 yellow honey guides inside, leaf blade elliptic to broadly ovate, 6.5–9.5 × 4.5–6.5 cm (vs. broadly elliptic to ovate, 4.0–5.0 × 3.0–4.0 cm), leaf blade base slightly cuneate (vs. rounded), corolla tube tubular, ventrally carinate, (vs. narrowly funnelform, strongly carinate, forming a clear keel), etc. The conservation status of P. pingguoensis is considered as ‘Critically Endangered’ (CR) according to the IUCN red list categories and criteria.
Subjects: Biology >> Botany >> Applied botany submitted time 2022-07-05 Cooperative journals: 《广西植物》
Abstract： Five newly recorded genera of vascular plants in Guangxi are reported, namely, Diodia L., Calyptocarpus Less, Syneilesis Maxim., Acroceras Stapf and Piptatherum P. Beauv, as well as Diodia virginiana L., Calyptocarpus vialis Less., Syneilesis aconitifolia (Bunge) Maxim., Acroceras tonkinense (Balansa) C. E. Hubbard ex Bor and Piptatherum kuoi S. M. Phillips & Z. L. Wu belonging to the five genera. Among them, Diodia virginiana L. and Calyptocarpus vialis Less. are naturalized species. The morphological descriptions and photos of two newly naturalized species are provided, and their invasiveness is evaluated based on wild investigation in Guangxi. As native plants, Syneilesis aconitifolia (Bunge) Maxim., Acroceras. tonkinense (Balansa) C. E. Hubbard ex Bor and Piptatherum. kuoi S. M. Phillips & Z. L. Wu are provided with the descriptions of characteristic diagnosis and photos. At last, the biogeographic significance for these newly recorded genera is discussed.
Subjects: Biology >> Botany >> Applied botany submitted time 2022-06-07 Cooperative journals: 《广西植物》
Abstract： Type specimens are not only the basis and evidence of plant classification, but also important basic data for the protection and sustainable utilization of plant resources. In order to promote the full utilization and reciprocal sharing of type specimens in IBK, the species, collecting locality, collecting date and collector of them were counted and analysed respectively. The results were as follows：(1) Based on the digital information of 4 645 collections and 5 736 herbarium type specimens in IBK, there are 2 128 species of vascular plants among them, which belong to 619 genera and 170 familes (include subspecies, varieties and forms), the dominant families in the collection of type specimens include Lauraceae, Gesneriaceae, Rubiaceae, Theaceae, Orchidaceae, Urticaceae, Liliaceae, Actinidiaceae, Euphorbiaceae, Ebenaceae, Ericaceae, etc. the dominant genera include Begonia, Aspidistra, Aristolochia, Ardisia, Ilex etc; (2) The type specimens were collected from 20 provinces, autonomous regions, municipalities and special administrative regions of China and 2 other countries. More type specimens were collected from Guangxi (48.19%), Hainan (24.14%) and Guangdong (11.63%); (3) The type specimen collection reached the peak in the 1930s and 1950s, and the peak of type specimen naming was in the 1980s, which was related to the rise of plant taxonomy in China and the compilation and research of flora of China, the average shelf life for type specimens was 21 years, and the longest shelf time is 82 years. The collection and digitization of type specimens are also discussed and prospected..
Subjects: Biology >> Botany >> Applied botany submitted time 2020-01-12 Cooperative journals: 《广西植物》
Abstract：中国南方一些少数民族地区民间“端午药市”流传至今，体现了民族医药的独具特色及其深远影响。为了解瑶族端午药市交易现状和发掘民族医药传统知识，采用民族植物学等方法对湖南省蓝山县端午药市进行调查，完成包括基原、地方名、药用部位、用途和用法、出现频度等内容的药用植物编目。结果表明：蓝山县端午药市药用植物种类丰富，收集并鉴定了共计103 科222 属262 种，药用植物种类广泛分布于各科和属中，其中种类较多的科有五加科（11 种）、茜草科（11 种）、菊科（11 种）、百合科（10 种）、唇形科（9 种）、蝶形花科（8 种）、芸香科（7 种）。药市药浴植物畅销且种类多样，达94 种，占总数35.9%，体现瑶族在治疗疾病上以预防保健为主的理念。经统计药市上均未被国家药典和地方标准收录的药用植物有131 种，占总数50.2%，成为发掘新药源、新用途的潜在资源。该研究还对端午药市售药者年龄进行调查，发现售药者的年龄主要集中在50～59 岁间，占总人数67%，40 岁以下的仅占总人数3%，可见民族药用传统知识的传承存在传承人老龄化、潜在传承人数量锐减的现象。该文还对药市交易药用植物的种类组成和民族药用特色进行了分析，探讨了端午药市对药用传统知识保护与传承的影响，并对蓝山端午药市的可持续发展提出了建议。
Subjects: Biology >> Botany >> Applied botany submitted time 2020-01-12 Cooperative journals: 《广西植物》
Abstract：中越边境喀斯特地区是全球生物多样性热点地区，也是生物多样性保护的关键区域，近年来在该地区发现了多个蛛毛苣苔属植物的新种。微花蛛毛苣苔于2001 年在越南北部喀斯特地区首次采集到标本，直到2018 年才被发表出来，然而发表时仅基于一号花发育未成熟的标本，故该物种的诸多形态特征仍不清楚。作者开展中越边境喀斯特地区植物多样性调查时，在我国云南东南部也发现了微花蛛毛苣苔，并采集到花发育成熟的植株，对其进行了解剖观察和测量，现对该物种进行补充描述，并提供墨线图和野外生态照片以资辨认。
Subjects: Biology >> Botany >> Applied botany submitted time 2018-09-07 Cooperative journals: 《广西植物》
Abstract： Beckmannia Host and Tripogon Roem. et Schult. of Poaceae are reported as two newly-recorded genera from Guangxi, China. There are two species and one variety of Beckmannia in global, which have a wide distribution in global, including one species and one variety in China. A species, Beckmannia syzigachne (Steud.) Fern. is found from Guangxi for the first time. There about 30 species of Tripogon in global, and majority species are distribution in Asia and Africa, including 11 species in China. A species, Tripogon filiformis Nees ex Steud. is found from Guangxi for the first time. Detailed morphological description and photos of the two newly-recorded genera and species are provided in this paper.
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