Shoot apex changes in size and shape from seedling to adult

Leaf primordium arise on the flank of the tall shoot apex as a horizontal ridge that expands laterally both ways until it has more than encircled the node

Tillers per m2

# of grains per tiller

grain weight 

Buds form at axils of most leaves

Bud forms a prophyll, similar to coleoptile

Tiller buds make early vascular conections with node bundles and have a vascular system to whole axis 

Transition from vegetative to reproductive stage 

1 ridge is targeted to become a flower and the lower ridge is produces a leaf

more primodium are produced (use fertilizer)

Several sections, and each section has a leaf 

The leaf is joined at the stemm by a node and internode 

Stem is fully elongated at anthesis 

Anthers release pollen

Pollen carries male gametes and goes from anther to stigma

4 microspores are produced

The carpel of wheat has 1 ovule and 2 styles with stigma branches. Only 1 megaspore mother cell that develops into megagametophyte 

How are florets forced open?

How long are stigmas receptive for?

By the swelling of the Iodicules

4-14 days, but pollen is only viable for 15-20 minutes

Pollen tube penetrates stigma and grows towards embryo sac

One sperm cell nucleus enters egg cell and fuses to produce the zygote. Other sperm cells fuses to initiate endosperm 

Vegetative Development - photosynthate goes to leaves, tillers and roots

Intermediate development - goes to nodes and stem elongating

Spike Growth - goes to upper 2 or 3 leaves

Flag leaf - accounts for 50% of photosynthate from early to mid-grain fill 

genees for reducing plant height

Cause yield increase because more dry matter was partitioned into the grain