STOMATAL SIZE IN FOSSIL PLANTS - EVIDENCE FOR POLYPLOIDY IN MAJORITY OF ANGIOSPERMS
STOMATAL SIZE IN FOSSIL PLANTS - EVIDENCE FOR POLYPLOIDY IN MAJORITY OF ANGIOSPERMS
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DOI：
10.1126/science.264.5157.421
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发表时间：
1994-04-15
期刊：
影响因子：
56.9
通讯作者：
MASTERSON, J
中科院分区：
文献类型：
--
作者：
MASTERSON, J
已发表的三项对被子植物多倍体频率的估计（30％至35％、47％和70％至80％）通过使用化石保卫细胞大小作为细胞DNA含量的代表来估计已灭绝的木本被子植物的基因组大小进行了测试。这些灭绝物种的推断染色体数表明，7 至 9 是被子植物的原始单倍体染色体数，并且大多数被子植物（约 70%）在其历史上具有多倍体。
Three published estimates of the frequency of polyploidy in angiosperms (30 to 35 percent, 47 percent, and 70 to 80 percent) were tested by estimating the genome size of extinct woody angiosperms with the use of fossil guard cell size as a proxy for cellular DNA content. The inferred chromosome numbers of these extinct species suggest that seven to nine is the primitive haploid chromosome number of angiosperms and that most angiosperms (approximately 70 percent) have polyploidy in their history.