Qingxiang Han's research while affiliated with Chinese Academy of Sciences and other places
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Publications (11)
Climate change can exert a considerable influence on the geographic distribution of many taxa, including coastal plants and populations of some plant species closely related to those used as agricultural crops. East Asian wild radish, Raphanus raphanistrum subsp. sativus, is an annual coastal plant that is a wild relative of the cultivated radish (...
Rohdea wangiana is described as a new species from SW Sichuan, China. It is somewhat similar to R. pachynema in based on spikes without a marked terminal tuft of sterile bracts and deltoid filaments, but differs based on a combination of the following characters: leaf blades marginally serrulate; peduncle ebracteate; one bract per flower; perianth...
Flowering is an important step in the life cycle of plants and indicates adaptability to external climatic cues such as temperature and photoperiod. We investigated the expression patterns of core genes related to flowering time regulation in Japanese wild radish (Raphanus sativus var. raphanistroides Makino) with different vernalization requiremen...
Background:
The respective role and relative importance of natural selection and gene flow in the process of population divergence has been a central theme in the speciation literature. A previous study presented conclusive evidence that wild radish on Japanese islands comprises two genetically isolated lineages: the southern and northern groups....
Reproductive allocation is a key process in the plant life cycle and aquatic plants exhibit great diversity in their reproductive systems. In the present study, we conduct a field investigation of three aquatic macrophytes: Stuckenia pectinata, Myriophyllum spicatum, and Potamogeton perfoliatus. Our results showed that widespread species, including...
Coastal plants with simple linear distribution ranges along coastlines provide a suitable system for improving our understanding of patterns of intra-specific distributional history and genetic variation. Due to the combination of high seed longevity and high dispersibility of seeds via seawater, we hypothesized that wild radish would poorly repres...
Due to the connected river between Xingyun Lake and Fuxian Lake, the exchange of seeds of Potamogeton pectinatus L. occurred through frequent water flow. Thus the gene flow of local populations between these two lakes could be expected to be high. However, PCoA Analysis showed that the genetic differentiation between the two habitats (Xingyun Lake...
Traditional classification of phytoplankton assemblages does not adequately reflect their ecological function in aquatic ecosystems. Therefore, we used a functional group approach based on the Q index to analyze the spatial and temporal patterns, environmental factors and the ecological status of phytoplankton in the Danjiangkou Reservoir (DJKR) of...
Premise of the study:
The first microsatellite primers were developed for Isoetes hypsophila, an endangered quillwort species endemic to the Qinghai-Tibetan Plateau in China, to further describe its genetic variability and population structure. We also examined their cross-amplification in a congeneric species, I. sinensis.
Methods and results:...
Citations
... It has been applied in a wide range of contexts, such as plant conservation, especially for endangered and endemic species [29][30][31][32][33][34]. It has also been useful in modeling the distribution of invasive species, forestry management, and agriculture [35][36][37][38]. ...
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... This suggests that the survival and growth of this species was less sensitive to the temperature of the habitat than rainfall. This relatively wide temperature adaptation range for the ecological niche or strong adaptability to habitat is also reflected in the report in [53], in which vernalization is not absolutely necessary for wild radish populations in southern Japan, where the wild radish exhibits a facultative vernalization requirement. ...
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... The trophic level index (TLI( P )) was recommended by China Environmental Monitoring Station (2001). It was used to determine water trophic status based on the following criteria: TLI( P ) < 30, oligotrophic; 30 TLI( P ) 50, mesotrophic; 50 < TLI( P ), eutrophic; 50 < TLI( P ) 60, light eutrophic; 60 < TLI( P ) 70, middle eutrophic; or 70 < TLI( P ), high eutrophic (Lin et al., 2021;Wan et al., 2016). TLI( P ) was calculated using the following formulae: ...
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... Temperature has been reported to affect the vegetative growth [25], flowering time [49], seed dormancy, and germination [50] of wild radish. Among the studied temperature factors, the minimum temperature of the coldest month (bio06) had the largest contribution (11.45%), with the threshold being >−5.72 • C, implying a possible wild radish preference for a cold climate. ...
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... Despite the lowered sea levels creating potential migration routes, the Tokara and Kerama Gaps may have restricted the movement of various plant species. Genetic analyses have indicated differences across the Tokara Gap in some studies but not across the Kerama Gap (Zhai et al., 2012;Han et al., 2015), and conversely in different investigations (Nakamura et al., 2010(Nakamura et al., , 2015. For coastal plants with sea-drifted seeds, the north-flowing warm ocean current, known as the Kuroshio Current (Figure 1), could play a crucial role in facilitating long-distance seed dispersal, thereby maintaining gene flow among isolated populations. ...
... The diversity of phytoplankton species was under a considerable influence of water temperature, limiting, on one hand, the expansion of psychrophilic Baikal species (Aulacoseira baicalensis) into the reservoir, but favoring, on the other hand, the growth of a broader spectrum of species typical, mostly, of the next summer phytoplankton of the lake. These include Nitzschia graciliformis, which is not dominant in other reservoirs of the world, and Asterionella formosa, which is a common representative of the phytoplankton in reservoirs [50][51][52]. The role of blue-green algae was minor. ...
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... Compared to terrestrial plant communities, the community structure of aquatic plants is more unstable because of the much lower species richness of aquatic communities than that of the terrestrial ones (Wu and Ding, 2020). However, only two studies have been done on aquatic plant communities and no SGDCs in both of them (Han et al., 2014;Njeri et al., 2020). Han et al. (2014) put more emphasis on the correlation between the genetic distances of Potamogeton pectinatus populations and the differences in species evenness of communities. ...
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... Entre elas estão os marcadores ISSR, que são muito utilizados pela sua capacidade de detectar grande número de fragmentos polimórfi cos (Mengxue et al. 2018, Santos et al. 2020. A espécie Isoëtes sinensis, endêmica do leste da Ásia, por exemplo, tem sido estudada por meio de uma variedade de marcadores genéticos como aloenzimas, RAPD, ISSR, AFLP e SSR (Chen et al. 2009, Chen et al. 2004, Chen et al. 2007, Kang et al. 2005, Li et al. 2012. A seguir serão apresentados os estudos de genética aplicados à conservação de duas espécies do gênero Isoëtes encontradas no norte do Brasil. ...
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