development and morphogenesis physical appearance of plant (leaves…
development and morphogenesis
physical appearance of plant
absorbing organ, sometimes storage
primary root or radicle
first organ to appear when seed germinates
grows downward to soil, anchoring and seedling.
primary roots becomes taproot.
it grows laterally to form a taproot system. such as carrots and turnips.
somes roots are called adventitious roots
arises from an organ than stem i.e. stem and sometimes leaf.
adventitious roots known as aerial root either pass for some distance through air before reaching soil or hanging in the air.
i.e. corn, screw pine.
the primary tissues of root
primary function is to support the leaves to conduct water and minerals to the leaves where it can be converted into usable products by photosynthesis
consist of vascular tissue xylem and pholem
stem consists of
lateral buds and leaves grow out of stem at intevaks
intervals on the stem between nodes
growing portion at apex of shoot
leaflets are attached at the tip of petiole
the midrib of leaf is divided into numerous leaflets and connected by common axis .
outermost to innermost