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Plant Lecture 8 09

Plant Lecture 8 09 - Lecture 2/11 Seed Plants II • Growth...

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Unformatted text preview: Lecture 2/11 Seed Plants II • Growth: – mapping growth changes onto the plant tree of life • Mapping life-cycle changes onto the plant tree of life • Seed plant diversity – Angiosperms and Gymnosperms – Gymnosperms • Cycadophyta • Ginkgophyta • Coniferophyta • Gnetophyta • Additional seed plant innovations – Swimming sperm – Double fertilization yes no no embryo and endosperm no yes no no yes some no some: 2 embryos no yes yes no no yes yes no d o u b l e f e r t i l i z a t i o n s w i m m i n g s p e r m yes no no embryo and endosperm no yes no no yes Yes/no no some: 2 embryos no yes yes no no yes yes no d o u b l e f e r t i l i z a t i o n s w i m m i n g s p e r m x y l e m v e s s e l s a r c h e g o n i a Seed Plant Feature Diversity yes no no embryo and endosperm no yes no no yes Yes/no no some: 2 embryos no yes yes no no yes yes no d o u b l e f e r t i l i z a t i o n s w i m m i n g s p e r m x y l e m v e s s e l s a r c h e g o n i a The curious case of the Gnetophyta Lecture 2/11 Angiosperms...
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Plant Lecture 8 09 - Lecture 2/11 Seed Plants II • Growth...

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