Plant development

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  • Created by: MariaC5
  • Created on: 05-01-18 17:48
What is a totipotent cell?
A cell that can develop into any part of the adult organism
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Most development occurs post-embryogenesis is true of plants or animals?
Plants
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Plants do not have an indeterminate growth pattern?
False
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Cell division occurs in meristems, is true for plants or animals?
Plants
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Hardly any cells are totipotent, is true for plants or animals?
Animals
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Why do mature seeds undergo regulated desiccation?
To protect the embryo
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What does regulated desiccation control in mature seeds?
When and where germination occurs
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What does regulated desiccation produce?
A long lived survival capsule
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What does ABA regulate?
Seed dormancy
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What is ABA?
A plant hormone
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'Endogenous organic compounds that affect growth and development at low concentrations' are what?
Plant hormones
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What is auxin?
A plant hormone
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What breaks dormancy and promotes germination?
Gibberellins
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In germinating cereal seeds, what do gibberellins do?
Stimulate break down of starch to feed growing seedling
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What is not a nutrient that seeds store for the embryo?
Starch
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Where does embryogenesis occur?
On the parent plant
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ABA deficient mutants are ---
Viviparous
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What two things does shoot elongation require?
Gibberellins and Synthesis
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Rapid stem elongation that cause GA biosynthesis is called?
Bolting
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Mendals peas are examples of what?
Mutants that cant synthesise GAs and are therefore dwarf or semi dwarf
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Rht weat are examples of what?
Mutants that cant respond GAs and are therefore dwarf or semi dwarf
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How do growth retardants work?
By inhibiting GA biosynthesis
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Plants make and use many hormones and signalling molecules, true or false?
True
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Why do responses to hormones vary?
Cell type and cell age
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What is auxin?
Growth plant regulator hormone
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Leaf primordia form around the...
apical meristem
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Shoot branches form around the...
axilliary meristem
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Root branches form around the...
pericycle cells
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Auxin stimulates --- and inhibits ---
root initiation, root elongation
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Cell expansion uses higher or lower auxin concentrations?
Lower
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Cell division uses higher or lower auxin concentrations?
Higher
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Toxic effects are due to higher or lower auxin concentrations?
Higher
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What is cytokinin?
A plant hormone that slows down the rate of dying
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What plant hormone, along with auxin is important in promoting cell division in meristems?
Cytokinin
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What can be described as 'unrestricted cell growth and division'?
Plant cancer
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Tumours are similar to...?
Callus
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Plants cannot regenerate from callus?
False
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Ration of auxin: cytokinin determines development?
True
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A high ratio of auxin:cytokinin determines development of?
Roots
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A medium ratio of auxin:cytokinin determines development of?
Callus
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A low ratio of auxin:cytokinin determines development of?
Shoots
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Plants accumulate water by
The roots
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Plants transport water by
The xylem
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Plant conserve water using
The waxy cuticles
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Transpiration and CO2 uptake are controlled by
Stomata
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Card 2

Front

Most development occurs post-embryogenesis is true of plants or animals?

Back

Plants

Card 3

Front

Plants do not have an indeterminate growth pattern?

Back

Preview of the front of card 3

Card 4

Front

Cell division occurs in meristems, is true for plants or animals?

Back

Preview of the front of card 4

Card 5

Front

Hardly any cells are totipotent, is true for plants or animals?

Back

Preview of the front of card 5
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