The evolutionary significance of polyploidy

Polyploidy, or the duplication of entire genomes, has been observed in prokaryotic and eukaryotic organisms, and in somatic and germ cells. The consequences of polyploidization are complex and variable, and they differ greatly between systems (clonal or non-clonal) and species, but the process has often been considered to be an evolutionary 'dead end'. Here, we review the accumulating evidence that correlates polyploidization with environmental change or stress, and that has led to an increased recognition of its short-term adaptive potential. In addition, we discuss how, once polyploidy has been established, the unique retention profile of duplicated genes following whole-genome duplication might explain key longer-term evolutionary transitions and a general increase in biological complexity

Morphological diversity of southern African members of <I>Oxalis</I>

Please help us populate SUNScholar with the post print version of this article. It can be e-mailed to: [email protected] en Dierkund

Two new <I>Oxalis</I> species (<I>Oxalidaceae</I>) from the Ai-Ais / Richtersveld Transfrontier Park, South Africa

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Chloroplast phylogeography of threatened aquatic Oxalis (<I>Oxalidaceae</I>): significant inter-population structure, divergent haplotypes and conservation implications

AgriwetenskappeBewaringsekologie en EntomologiePlease help us populate SUNScholar with the post print version of this article. It can be e-mailed to: [email protected]

Two new <I>Oxalis</I> (Oxalidaceae) species from the Richtersveld National Park, South Africa

Please help populate SUNScholar with the full text of SU research output. Also - should you need this item urgently, please send us the details and we will try to get hold of the full text as quick possible. E-mail to [email protected]. Thank you.Journal Articles (subsidised)NatuurwetenskappePlant- en Dierkund

The Biogeography of Oxalis L. in South Africa: a preliminary study

NatuurwetenskappeBotaniePlease help us populate SUNScholar with the post print version of this article. It can be e-mailed to: [email protected]