Auxiliary cell- receives the diploid nucleus
after fertilization and develops into the carposporophyte. The auxiliary
cell is not formed until after fertilization.
Carpogonium- specialized elongate female gametophyte
cell located at the end of the carpogonial branch.
Carpospore- product of the carposporophyte, develops
into the tetrasporophyte.
Carpospor ophyte- parasitic,diploid life
stage that develops on the female gametophyte after fertilization. Produces
Cystocarp- structure of female gametophyte that
includes the pericarp (n) and carposporophyte (2n)
Dioieous- having male and female reproductive structures
on separate individuals, separate sexes
Gametophyte- haploid life stage, grows from
tetraspores and produces gametes. Dioecious, site of fertilization.
Intercalary Division - division not occurring
at the apical cell
Isomorphic- having morphologically similar gametophyte
and tetrasporophyte phases
Monopodial- growth pattern where the main axis
remains the main axis throughout the life of the seaweed .
Monostomatic- only one cell layer thick
Oogomy- life history where female gamete is large
Parenchymatous- growth where cell division
is not restricted to any particular cell, cells can divide in more than
Pericarp- Female gametophyte tissue that surrounds
the carposporophyte. Together with the carposporophyte it makes up the cystocarp.
Pericentral Cell- four cells that form directly
off of the axial cells during growth. They will divide further to form the
lateral veins, supporting cells of the carpogonium and thicken the midrib
Polystromatic- more than one cell layer thick
Pseudoparenchyma - construction consisting
of an aggregate of filaments where cell division is restricted to certain
cells in the seaweed structure
Spermatia - non-motile sperm, characteristic of
the Division Rhodophyta
Spermatangia - specialized male reproductive
cells which produce spermatia
Tetrasporangia- site of meiosis on the tetrasporophyte
that results in the production of tetraspores
Tetrasporophyte- diploid life stage that
produces tetraspores on structures called tetrasporangia
Trichogyne- elongate end of carpogonium that
is the site of spermatia attachment
Triphasic- Life history consisting of three phases
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