Taxonomy, morphology and development

16 important questions on Taxonomy, morphology and development

How do you identify a tiller?

If they are growing on the main tiller; count the phytomer they are on
If they are growing from a phytomer on a certain tiller: first tiller then phytomer

What is the cumulative phytomer number?

The number f phytomers to the base of the plan

How are plastochron and phyllochron expressed?

Expressed in number of leaves/leaf primordia per time unit (leaves per day)
  • Higher grades + faster learning
  • Never study anything twice
  • 100% sure, 100% understanding
Discover Study Smart

What is contained by each vegetative grass phytomer?

An axillary bud:
so in theory exponential branching

What is the theory about buds and the practice?

In theory: exponential branching
But in practice; most buds remain dormant, only a fraction forms a tiller

What are the factors controlling tillering?

- Intensity of PAR intercepted
- Ratio of red and far-red irradiance of the light intercepted
- Nutrient status of the soil
- Manipulation of plant structure (mowing, grazing)

Why are the phytomers produced very low (ground level)?

So that grazing/mowing does not affect the plant

What are the advantages of tillering habits of grass?

- Quickly colonize available space
- Recover of damage

What is the difference between a tiller and an axillary branch?

Grow higher up; are almost at the same part of the leave but: leave is an organ, tiller is composed of organs

What if the phytomer number is the same?

This means that they have the same organ properties, same conditions at the start of the plant when it was small

What is thermal time?

Time x temperature; you are correcting for the effect of temperature

How can you measure the plastochron?

Sacrifice the plants

When is a leaf mature?

When you see the tongetje/ligule

How is leaf death called?

Senescense

Wha can a tiller bud do?

Can produce a new stem

Why are the parts where the phytomers are produced usually very low?

Because then grazing does not entirely effects the plant

The question on the page originate from the summary of the following study material:

  • A unique study and practice tool
  • Never study anything twice again
  • Get the grades you hope for
  • 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
Trustpilot Logo