Plant Hormones & Tropisms:

Meristematic TissueThe found in zones of the plant where growth can take

place. Meristematic cells, in most plants, are undifferentiated cells which give rise to various organs of the plant and keep the plant

growing.

Apical Meristem Lateral Meristem(Vascular Cambium)

What essential growth process is occurring in the

meristematic tissue?

________________Growing points of the

____________ & ___________ allowing for an increase

in plant _____________.Growth which increases

the _________________ of the

plant.

Positive TropismGrowth __________________ a stimulus

Negative TropismGrowth __________________ a stimulus

Hormones are chemical messengers that are transported throughout an organism to stimulate an effect. Plants produce hormones….that’s right, they really do! Hormones

can affect cell division, growth and cell differentiation.

A tropism is a plants directional growth in response to an external stimulus.

AuxinsAuxins are produced in the __________ of

shoots and stimulate the __________________ and/or ___________________ of cells and

therefore the plant.

Gibberellins

Produced in _________. Provides energy by turning starch into

________.Can cause stem ________________ & _______

________________.