Arbuscular mycorrhizal fungi - Hyphal fusion and multigenomic structure

被引:40
作者
Bever, JD [1 ]
Wang, M
机构
[1] Indiana Univ, Dept Biol, Bloomington, IN 47405 USA
[2] Univ Chicago, Dept Stat, Chicago, IL 60637 USA
关键词
D O I
10.1038/nature03294
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Arising from: T. E. Pawlowska & J. W. Taylor Nature427, 733–737 (2004); Pawlowska & Tylor reply Arbuscular mycorrhizal (AM) fungi (Glomeromycota) reproduce asexually, are multinucleate, and have high genetic variation within single cells. Pawlowska and Taylor1 find that genetic variation within AM fungal cells is not lost as a result of segregation, and they interpret this as evidence that the variation is present within each nucleus and that all nuclei within individual spores are genetically identical (that is, homokaryotic). Here we show that their empirical observations are also consistent with a distribution of genetic variation between nuclei within spores (that is, heterokaryotic), given that there is fusion of fungal hyphae. This analysis, together with complementary findings2,3,4, suggests that AM fungi have an unusual genomic structure in which multiple, genetically diverse nuclei are maintained within cells through remixing by hyphal fusion.
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页码:E3 / E4
页数:2
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