Evolution of Plants

Evolution of Plants - chlorophyll a , chlorphyll c ,...

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Evolution of Plants | Back to Top Fossil and biochemical evidence indicates plants are descended from multicellular green algae. Various green algal groups have been proposed for this ancestral type, with the Charophytes often being prominently mentioned. Cladistic studies support the inclusion of the Charophytes (including the taxonomic order Coleochaetales) as sister taxa to the land plants. Algae dominated the oceans of the precambrian time over 700 million years ago. Between 500 and 400 million years ago, some algae made the transition to land, becoming plants by developing a series of adaptations to help them survive out of the water. Table 1. Photosynthetic pigments of algae and plants. Prokaryote groups are shown in red, protists in blue, and vascular plants in purple. Taxonomic Group Photosynthetic Pigments Cyanobacteria
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Unformatted text preview: chlorophyll a , chlorphyll c , phycocyanin, phycoerythrin Chloroxybacteria chlorophyll a , chlorphyll b Green Algae (Chlorophyta) chlorophyll a , chlorphyll b , carotenoids Red Algae (Rhodophyta) chlorophyll a , phycocyanin, phycoerythrin, phycobilins Brown Algae (Phaeophyta) chlorophyll a , chlorphyll c, fucoxanthin and other carotenoids Golden-brown Algae (Chrysophyta) chlorophyll a , chlorphyll c, fucoxanthin and other carotenoids Dinoflagellates (Pyrrhophyta) chlorophyll a , chlorphyll c , peridinin and other carotenoids Vascular Plants chlorophyll a , chlorphyll b , carotenoids Vascular plants appeared by 350 million years ago, with forests soon following by 300 million years ago. Seed plants next evolved, with flowering plants appearing around 140 million years ago. This pattern is shown in Figure 2....
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Evolution of Plants - chlorophyll a , chlorphyll c ,...

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