Subjects: Biology >> Botany submitted time 2022-09-03 Cooperative journals: 《广西植物》
Abstract： Carex as a super large genus with high species diversity in the world, 100 species of Carex have been recorded from Guangxi at present. The resources of Carex in Guangxi are still unclear, the in-depth investigations and researches are lack too. Based on specimens identification, literature research and field investigation, we systematically cleared up the early researches of Carex in Guangxi, in order to provide background data for the subsequent research and sustainable utilization. At first, the research brief histories of Carex taxonomy in Guangxi were summarized. The genus Carex in Guangxi with high endemism, we focus on 16 taxa of Carex published based on types collected from Guangxi, verify the accuracy of their type locality, supplement distribution information, and make sure that 8 species of Carex endemic to Guangxi at last. Eight newly recorded species of Carex in Guangxi are reported here, which are C. alopecuroides D. Don, C. chungii Z. P. Wang, C. hirtiutriculata L. K. Dai, C. insignis Boott, C. nubigena D. Don, C. sendaica Franch., C. sociata Boott and C. transversa Boott. The morphological feature diagnosis and voucher specimens for these newly recorded species were provided. We also discussed the species diversity, endemism, geographical distribution, and the potential utilization of Carex in Guangxi.
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 2018-10-26 Cooperative journals: 《广西植物》
Abstract：为探讨干旱胁迫对欧李表型可塑性的影响，本实验以欧李为实验材料，通过干旱胁迫处理，对欧李的形态特性、生长特性等方面进行研究。结果表明，随着干旱胁迫的加剧，欧李根生物量、枝叶生物量、植株总生物量积累、根冠比和根冠比胁迫指数均呈现先升高后降低的趋势，在T1处理下达到最大值，并显著高于其他处理（α=0.05）。随土壤含水量的降低，欧李根的生物量分配指数呈先增加后降低的趋势，叶生物量与之相反，在T1处理下根的生物量分配指数最大，枝叶的最小（α=0.05）。在水分供应为60%-80%时，欧李的株高、冠幅、基径、二级分枝数、主根长、主根直径及侧根数量均达到最大值（α=0.05），对一级分枝数的生长没有显著影响。随着水分胁迫的加剧，叶片长从T2处理开始下降，叶片宽、单片叶面积及比叶面积均呈先增加后减少的趋势（α=0.05）。综上可得，欧李通过调整形态特性、各器官生物量及累及其分配对不同干旱胁迫条件产生较强的可塑性。
Subjects: Biology >> Molecular Biology submitted time 2018-05-07 Cooperative journals: 《广西植物》
Abstract：物种遗传多样性与其适应能力和进化潜力密切相关，了解珍稀濒危植物遗传多样性和遗传结构可以为其保护策略与管理方式的制定提供理论基础。薄叶金花茶、小花金花茶和小瓣金花茶是三种濒危金花茶植物，本研究利用微卫星标记对它们的7个种群共184个个体进行遗传多样性和遗传结构分析。11个位点共检测到等位基因92个。在物种水平上，小瓣金花茶平均等位基因数（NA）为3.9、有效等位基因数（NE）为2.328、观测杂合度（Ho）为0.520、期望杂合度（He）为0.501，高于薄叶金花茶和小花金花茶。在种群水平上，有效等位基因数（NE）在1.788～2.466之间，期望杂合度（He）在0.379～0.543之间；种群间遗传分化系数（FST）在0.143 7～0.453 3之间，种群间基因流（Nm）在0.301 5～1.488 9之间。AMOVA 分子变异分析显示65.72%的变异存在于种群内。三种金花茶具有较低水平的遗传多样性和高水平的种群间遗传分化。STRUCTURE和PCoA种群遗传结构分析结果将取样种群分为2组，即薄叶金花茶和小花金花茶大部分个体分为一组，小瓣金花茶大部分个体分为一组。现存所有种群应根据实际情况尽快采取就地保护或迁地保护措施。
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