<Tr> <Td> Tetraphytina </Td> <Td> <Table> <Tr> <Td> </Td> <Td> <P>? Scourfieldiales Moestrup 1991 </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> <P> Pedinophyceae Moestrup 1991 </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> Chlorophytina </Td> <Td> <Table> <Tr> <Td> </Td> <Td> <P> Chlorodendrophyceae Massjuk 2006 </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> <Table> <Tr> <Td> </Td> <Td> <P> Trebouxiophyceae Friedl 1995 </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> <Table> <Tr> <Td> </Td> <Td> <P> Ulvophyceae Mattox & Stewart 1984 </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> <P> Chlorophyceae Christensen 1994 </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td> </Td> </Tr> </Table> </Td> </Tr> <Table> <Tr> <Td> </Td> <Td> <P>? Scourfieldiales Moestrup 1991 </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> <P> Pedinophyceae Moestrup 1991 </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> Chlorophytina </Td> <Td> <Table> <Tr> <Td> </Td> <Td> <P> Chlorodendrophyceae Massjuk 2006 </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> <Table> <Tr> <Td> </Td> <Td> <P> Trebouxiophyceae Friedl 1995 </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> <Table> <Tr> <Td> </Td> <Td> <P> Ulvophyceae Mattox & Stewart 1984 </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> <P> Chlorophyceae Christensen 1994 </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td> </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> <P>? Scourfieldiales Moestrup 1991 </P> </Td> </Tr> <P>? Scourfieldiales Moestrup 1991 </P>

Which structure main function is to produce food sugar in a plant