@article {93,
	title = {Isoetes yunguiensis (Isoetaceae), a new basic diploid quillwort from China},
	journal = {Novon},
	volume = {12},
	year = {2002},
	note = {Cited By (since 1996):15Export Date: 11 November 2013Source: Scopus},
	month = {2002///},
	pages = {587 - 591},
	abstract = {Isoetes yunguiensis, a basic diploid species with a chromosome number of 2n = 22, is described and illustrated. This species occurs on the Yunnan-Guizhou Plateau in southwest China. It is similar to I. japonica in its appearance and emergent aquatic habit. Herbarium specimens of I. yunguiensis previously have been misidentified as I. japonica. Isoetes yunguiensis differs from I. japonica in megaspore and microspore morphology and chromosome number.},
	keywords = {China, East Asia, Isoetaceae, Isoetes, Quillwort, Yunnan-Guizhou Plateau},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0036939584\&partnerID=40\&md5=da8d4d4668c03846b51b3df5877e8602},
	author = {Wang, Q.-F. and Liu, X. and Taylor, W.C. and He, Z.-R.}
}
@article {87,
	title = {Relationship between Water Chemistry and the Distribution of the Endangered Aquatic Quillwort Isoetes sinensis Palmer in China},
	journal = {Journal of Freshwater Ecology},
	volume = {18},
	year = {2003},
	note = {Cited By (since 1996):6Export Date: 11 November 2013Source: Scopus},
	month = {2003///},
	pages = {361 - 367},
	abstract = {The progressive decline in populations of Isoetes sinensis Palmer in China has been attributed to deteriorating water quality; however, no data have been adduced to support this assumption. In this study we identified locations in China that presently have populations of I. sinensis and locations where the species has been extirpated. We measured various water chemistry parameters at these sites, as well as at similar sites within the distribution range of I. sinensis but from where the species has never been recorded. The results indicate that distribution and occurrence of I. sinensis are closely correlated with water chemistry. Water samples drawn from habitats from where I. sinensis has been extirpated had higher concentrations of heavy metal ions, particularly chromium VI (Cr 6+). In addition, these samples consistently yielded higher readings for dissolved carbon dioxide, water hardness, and concentration of nitrates.},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0242275988\&partnerID=40\&md5=c81ad2c1833c6a70e17163c958e43e50},
	author = {Wen, M.-Z. and Pang, X.-A. and Wang, Q.-F. and Taylor, W.C.}
}
@article {72,
	title = {Genetic variation within the endangered quillwort Iso{\"e}tes hypsophila (Isoetaceae) in China as evidenced by ISSR analysis},
	journal = {Aquatic Botany},
	volume = {82},
	year = {2005},
	note = {Cited By (since 1996):21Export Date: 11 November 2013Source: Scopus},
	month = {2005///},
	pages = {89 - 98},
	abstract = {The genetic diversity of 56 individuals of Iso{\"e}tes hypsophila Hand.-Mazz. from China was investigated by ISSR. Twelve primers were screened from 65 primers, and a total of 119 DNA fragments were scored, of these, 82\% were polymorphic bands, which indicated that high levels of genetic variation existed in the natural populations. Genetic diversity varied greatly among populations with the percentage of polymorphic band (PPB) values ranging from 8 to 35\%. An analysis of molecular variance (AMOVA) was used to apportion the variation between regions, among populations within regions, and within populations. Results indicated that most of the variance (85\%) occurred between Yunnan and Sichuan. The variances among populations within regions and within populations, however, were only 5 and 10\%, respectively. In the among-population analysis, the larger part of genetic variation (77\%) resided among populations, and less (23\%) presented differences within populations. UPGMA cluster analysis showed that there was no distinct genetic differentiation between populations from Sichuan province. A number of causes including limited gene flow, genetic drift and inbreeding might have led to these observed genetic profiles of I. hypsophila. {\textcopyright} 2005 Elsevier B.V. All rights reserved.},
	keywords = {Conservation, Endangered, Genetic variation, Isoetes hypsophila, ISSR},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-20444420155\&partnerID=40\&md5=c58709593caeba345cf50c4fba7d6213},
	author = {Chen, J.-M. and Liu, X. and Wang, J.-Y. and Robert, G.W. and Wang, Q.-F.}
}
@article {65,
	title = {Ecology and conservation of the endangered quillwort Isoetes sinensis in China},
	journal = {Journal of Natural History},
	volume = {39},
	year = {2006},
	note = {Cited By (since 1996):2Export Date: 11 November 2013Source: Scopus},
	month = {2006///},
	pages = {4069 - 4079},
	abstract = {Isoetes sinensis Palmer is an East Asia endemic fern that faces impending extirpation from the expansive area of Mainland China. Presently, only two natural populations are known to exist in this vast region. Both populations have decreased by about 50\% within the last 4 years. This reduction is most probably related to the decline in the size of the wetlands since reproductive activity, spore production, and recruitment were noticeably lower at the microsites occurring in smaller ponds. The decline in population size seems to be associated with succession from marsh to dry land at the habitats of both populations. The study revealed that individuals in both populations produced copious numbers of spores suggesting adequate fecundity, furthermore high levels of spore germination were obtained in laboratory experiments. However, inefficient spore dispersal appears to have contributed to the limited spread of the species. The sex ratio in both populations was male-biased. Several factors are identified here as posing a threat to Isoetes sinensis populations in China, chiefly the loss of habitat due to infrastructure construction and competition with adventive weed species for establishment on available sites. Disturbance by introduced mammals during browsing and trampling by livestock farm workers, as well as tourists, further contribute to the diminishing numbers of Isoetes sinensis at the study sites. {\textcopyright} 2005 Taylor \& Francis.},
	keywords = {China, Conservation, Ecology, Isoetes sinensis, Rare fern},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33646483501\&partnerID=40\&md5=91677e55ca7f81da659db6f0f6afe260},
	author = {Wang, J.-Y. and Gituru, R.W. and Wang, Q.-F.}
}
@article {50,
	title = {Spore morphology of Iso{\"e}tes (iso{\"e}taceae) from China},
	journal = {Journal of Systematics and Evolution},
	volume = {46},
	year = {2008},
	note = {Export Date: 11 November 2013Source: Scopus},
	month = {2008///},
	pages = {479 - 489},
	abstract = {Micromorphological characters of mega- and microspores of five Iso{\"e}tes species from China were observed under scanning electron microscope (SEM). Megaspores of I. hypsophila have a levigate ornamentation, and are 358 μm in diameter (mean, n=30), microspores of this species have a gyrus ornamentation, and are 22 μm in length (mean, n=30); megaspores of I. yunguiensis have a cristate-reticulate ornamentation, with a size of 390 μm in diameter (mean, n=30), while microspores nearly smooth with some fine granulates, and with a size of 22 gm in length (mean, n=30); megaspores of I. taiwanensis are tuberculate and 312 μm in diameter (mean, n=30), echinate microspores are 24 μm in length (mean, n=30); cristate megaspores of I. sinensis are 409 μm in diameter (mean, n=30), and echinate microspores are 28 μm in length (mean, n=30); megaspores of I. orientalis have a cristate-reticulate ornamentation, with diameter of 420 μm (mean, n=30), microspores of this species have an echinate-tuberculate ornamentation with a size of 34 μm in length (mean, n=30). Based on the morphological characters of spores and chromosome numbers among taxa, it was found that mean spore size in each species of Iso{\"e}tes generally reflected the ploidy level. I. hypsophila, I. yunguiensis and I. taiwanensis, with smaller mean spore size, are diploidy with 2n=22; I. sinensis (2n=44) and I. orientalis (2n=66), with larger mean spore size, are polyploidy. The spore morphology of Iso{\"e}tes still plays an important role in identification and classification of Iso{\"e}tes from China.},
	keywords = {China, Evolution, Isoetes, Origin, Spore morphology},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-57349117891\&partnerID=40\&md5=f310ff0165e440259efb4b7c64314743},
	author = {Liu, X. and Liu, H. and Wang, Q.-F.}
}
@article {52,
	title = {Chloroplast DNA phylogeography of the Chinese endemic alpine quillwort Isoetes hypsophila hand.-mazz. (isoetaceae)},
	journal = {International Journal of Plant Sciences},
	volume = {169},
	year = {2008},
	note = {Cited By (since 1996):6Export Date: 11 November 2013Source: Scopus},
	month = {2008///},
	pages = {792 - 798},
	abstract = {We examined chloroplast trnL intron sequence variation within Isoetes hypsophila, a Chinese endemic alpine quillwort species. Sequence data were obtained from 46 individuals in six populations throughout the natural distribution of the species. Sequences appeared to have neutral evolution (Tajima{\textquoteright}s criterion D = -1.66453, 0.1 \&gt; P \&gt; 0.05; Fu and Li{\textquoteright}s test D* = -1:92897, 0.1 \&gt; P \&gt; 0.05; F* = -2.17823, 0.1 \&gt; P \&gt; 0.05). Eleven haplotypes were identified in I. hypsophila. A relatively high level of haplotype diversity (h = 0.817) and a low level of nucleotide diversity (π = 0:0045) were detected in I. hypsophila. Indirect estimates of gene flow based on cpDNA variation revealed significant genetic differentiation between the ZD1 population in Yunnan Province and the populations from Sichuan Province. High genetic differentiation between Yunnan and Sichuan populations was consistently indicated by both hierarchical analyses of molecular variance (AMOVA; GST = 0.5011) and the structure of a neighbor-joining tree. From nested clade analysis, restricted gene flow with isolation by distance was inferred to be responsible for the current spatial genetic structure of I. hypsophila. {\textcopyright} 2008 by The University of Chicago. All rights reserved.},
	keywords = {Alpine quillwort, cpDNA trnL intron sequence, Isoetes hypsophila, Nested clade analysis, Phylogeography},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-47649125533\&partnerID=40\&md5=8f27b208869f24aef198146456c288ea},
	author = {Chen, J.-M. and Liu, F. and Gituru, W.R. and Wang, Q.-F.}
}
