@article {151,
	title = {Morphogenetic plastid migration and microtubule organization during megasporogenesis in Isoetes},
	journal = {Protoplasma},
	volume = {152},
	year = {1989},
	note = {Cited By (since 1996):8Export Date: 11 November 2013Source: Scopus},
	month = {1989///},
	pages = {136 - 147},
	abstract = {The large megasporocytes of Isoetes provide an exceptional system for studying microtubule dynamics in monoplastidic meiosis where plastid polarity assures coordination of plastid and nuclear division by the intimate association of MTOCs with plastids. Division and migration of the plastid in prophase establishes the tetrahedrally arranged cytoplasmic domains of the future spore tetrad and the four plastid-MTOCs serve as focal points of a unique quadripolar microtubule system (QMS). The QMS is a dynamic structure which functions in plastid deployment and contributes directly to development of both first and second division spindles. The nucleation of microtubules at discrete plastid-MTOCs is compared with centrosomal nucleation of microtubules in animal cells where growth of microtubules involves dynamic instability. {\textcopyright} 1989 Springer-Verlag.},
	keywords = {Isoetes, megasporogenesis, meiosis, Microtubules, Mitotic apparatus, Monoplastidy},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0001447651\&partnerID=40\&md5=8b7012cd1332d93eee67552099d26e38},
	author = {Brown, R.C. and Lemmon, B.E.}
}
@article {129,
	title = {Biosystematic studies on the genus Isoetes (Isoetaceae) in Japan. II. Meiotic behavior and reproductive mode of each cytotype},
	journal = {American Journal of Botany},
	volume = {83},
	year = {1996},
	note = {Cited By (since 1996):13Export Date: 11 November 2013Source: Scopus},
	month = {1996///},
	pages = {1309 - 1322},
	abstract = {Meiotic behaviors and reproductive modes of Japanese Isoetes were studied. The hexaploid (2n = 66) and the octaploid (2n = 88) of I. japonica consistently formed 33 and 44 bivalents, respectively, at diakinesis and/or metaphase I in both micro- and megaspore mother cells. The tetraploid (2n = 44) of I. sinensis formed 22 bivalents and its hexaploid made 33 bivalents in both types of spore mother cells. At diakinesis and/or metaphase I of microspore mother cells in I. asiatica with 2n = 22, 11 bivalents were detected. Because behaviors of meiosis in all cytotypes mentioned above were quite regular and plants yielded normal-appearing spores, they should reproduce sexually. Aneuploids of I. japonica with 2n = 87 formed 43 bivalents and one univalent, and I. sinensis with 2n = 65 formed 32 bivalents and one univalent in microspore mother cells. Meiosis of both cytotypes was almost regular and yielded microspores of normal appearance. In the heptaploid (2n = 77) of I. japonica, a configuration of 22 bivalents and 33 univalents was detected in micro- and megaspore mother cells, and various irregularities were observed throughout the meiotic divisions. Therefore, the genomic formula of the heptaploid is symbolized as AABBCDE, and the heptaploid is a sterile F 1 hybrid between the hexaploid (AABBCC) and the octaploid (AABBDDEE) of I. japonica. Since diploid and even-numbered polyploids regularly formed bivalents and odd-numbered ones displayed irregularities, allopolyploidy should act as a significant speciation mechanism in this genus.},
	keywords = {Chromosome, Hybrid, Isoetes, megasporogenesis, meiosis, microsporogene sis, polyplo id, reproductive mode},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0030475989\&partnerID=40\&md5=996182a1723b75d447e3a2137006f7bd},
	author = {Takamiya, M. and Watanabe, M. and Ono, K.}
}
