期刊：
Journal of Bryology,2019年41(2):121-134 ISSN：0373-6687
通讯作者：
Wang, Zheng-Xiang;Lei, Yun
作者机构：
[Li, Ting-Ting; Wang, Zheng-Xiang; Lin, Li-Qun; Yang, Lan-Fang] Hubei Univ, Fac Resources & Environm Sci, Wuhan, Hubei, Peoples R China;[Li, Ting-Ting; Wang, Zheng-Xiang; Bu, Gui-Jun] Hubei Key Lab Reg Dev & Environm Response, Wuhan, Hubei, Peoples R China;[Li, Ting-Ting; Wang, Zheng-Xiang; Bu, Gui-Jun] Hubei Univ, Hubei Collaborat Innovat Ctr Green Transformat Bi, Wuhan, Hubei, Peoples R China;[Lei, Yun] Cent China Normal Univ, Sch Life Sci, Wuhan, Hubei, Peoples R China;[Liu, Chang-Yong] Natl Nat Reserve Management Bur Qizimei Mt, Enshi, Peoples R China
通讯机构：
[Wang, Zheng-Xiang] H;[Lei, Yun] C;Hubei Univ, Fac Resources & Environm Sci, Wuhan, Hubei, Peoples R China. Hubei Key Lab Reg Dev & Environm Response, Wuhan, Hubei, Peoples R China. Hubei Univ, Hubei Collaborat Innovat Ctr Green Transformat Bi, Wuhan, Hubei, Peoples R China. Cent China Normal Univ, Sch Life Sci, Wuhan, Hubei, Peoples R China.
关键词：
Peatlands;Sphagnum palustre;tissue water content;water management;water table;wetland restoration
摘要：
Introduction. Human disturbance has recently led to increasingly serious destruction of Sphagnum L. wetlands in subtropical high mountains, resulting in an urgent need for wetland restoration. Methods. Through a field experiment conducted in western Hubei Province, China, the effects of four different microtopographic types [concave surface, convex surface, concave and convex surface (CC surface), and flat surface] and water table depth (0 to -30 cm) on three growth indicators (number of capitula, coverage and biomass) of Sphagnum palustre L. were examined. The objective was to identify the optimal hydrological conditions for S. palustre growth and thus facilitate its rapid recolonisation and restoration of these wetlands. Key results. The results showed that different microtopographic conditions significantly influenced S. palustre growth. Among them, S. palustre in the CC surface showed the worst growth, while no significant differences existed among the other three microtopographic types. Additionally, as the water table increased, the growth of S. palustre increased, but long-term flooding impeded growth. The water table affected S. palustre growth via effects on its tissue water content. Conclusions. Microtopographic reshaping was not essential for the success of S. palustre recolonisation, and microtopography that maintained the water table to within -10 cm of the surface without flooding were best, independent of the microtopographic types. In addition, the growth patterns of S. palustre changed with changes in the environment, which may be related to its long-term adaptation to conditions of a lower water table.
摘要：
Sphagnum wetlands in subtropical high-mountain regions have been severely destroyed by human activities, necessitating restoration efforts. We studied the effects of substrate and planting method on Sphagnum palustre L. growth and the underlying mechanisms to determine the optimal conditions for S. palustre restoration. S. palustre collected from natural wetlands was grown on nine substrates and with four planting methods in a greenhouse. The results show that S. palustre grew best in mountain yellow-brown soil without added peat or river sand and when planted as intact plants. Substrate pH and P content and capitula P content negatively correlated with S. palustre productivity, while initial biomass of S. palustre at planting positively correlated with productivity. S. palustre restoration on local mountain soil in subtropical high-mountain regions is practical, which may provide a new perspective for restoring peatlands. Traditional restoration method using the 10 cm upper parts of S. palustre as transplanted materials does not destroy the source S. palustre populations in habitats where plants are collected. However, we argue that a planting method using only capitula (top 1-2 cm) may be a better choice for S. palustre restoration, due to the similar productivity but less impact to source S. palustre populations.
摘要：
Based on sequences of ITS, matK, rbcL and rps16, a phylogenetic tree is constructed for Pseudostellaria and outgroup genera of Caryophyllaceae subfamily Alsinoideae including Stellaria and Cerastium, and members of subfamily Caryophylloideae, by means of maximum parsimony, maximum likelihood and Bayesian inference. The results indicate that core Pseudostellaria is monophyletic; however, the presence of two recognizable clades in the genus does not support the current infrageneric classification into two sections. Evolution of six morphological characters, including root tubers, stamen number and cleistogamous and chasmogamous flowers, reflect phylogenetic relationships between Pseudostellaria and allied taxa. The three North American Pseudostellaria spp. fell outside of the genus; Pseudostellaria sierrae and Pseudostellaria oxyphylla formed a well-supported clade, and they are treated as a new genus, Hartmaniella.
通讯机构：
College of Life Sciences, Central China Normal University, Wuhan, China
关键词：
孩儿参属;形态特征;分类检索表;分类纲要;分布示意图
摘要：
在标本和文献综合分析的基础上，对世界范围内孩儿参属（ Pseudostellaria Pax）植物的主要形态特征进行了总结，依据Mizushima的分类系统编制了孩儿参属的分类检索表，对5个存疑种进行了初步分类处理，并对孩儿参属各种类的分布状况进行了绘图和分析。结果表明：具有肉质块根、绝大多数种具有闭锁花以及开放花花瓣常呈2浅裂是孩儿参属区别于石竹科（ Caryophyllaceae）其他属的典型特征。初步确认全世界的孩儿参属植物共22种，被分成Sect. Pseudostellaria和Sect. Mamillatae 2个组，其中，前者仅包含石生孩儿参﹝P. rupestris （ Turcz.） Pax﹞1种，而后者则被进一步分成Ser. Mamillatae和Ser. Distantes 2个系。本研究结果不支持将P. sierrae Rabeler et R. L. Hartm.和P. oxyphylla （ B. L. Rob.） R. L. Hartm. et Rabeler归入孩儿参属的观点，并建议将矮小孩儿参﹝P. maximowicziana （ Franch. et Sav.） Pax﹞、须弥孩儿参﹝P. himalaica （ Franch.） Pax﹞和异花孩儿参﹝P. heterantha （ Maxim.） Pax﹞分别独立成种。从分布区域看，孩儿参属呈北温带间断分布，由北美洲、地中海地区和东亚3个相互隔离的地理区域组成，并且，东亚为其多样化分布中心。
