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The Evolution of Plant Stems in the Earth’s History

Abstract

Plant life developed in the water, and this process took over three billion years. Only relatively recently - speaking in terms of the Earth’s history - when the atmosphere’s oxygen content had reached suitably high levels, terrestrial environments were colonized by plants. The so-called “Step on land” took place about 450 million years ago on permanently humid sites in coastal environments. At that time, the Earth generally had a warm climate. Only some spores, fragments of cuticles and epidermis are early witnesses from this period.

Keywords

Vascular Bundle Land Plant Secondary Growth Secondary Xylem Sieve Tube 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

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