plant growth bioregulators
DESCRIPTION
Plant Growth Bioregulators. 4 th Year(Special Botany Students). Prof. Dr. H. S. Aldesuquy. Questions. * Where are auxins produced by the plant? How are they transported? * What effect do auxins have on shoot growth? - PowerPoint PPT PresentationTRANSCRIPT
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4th Year(Special Botany Students)
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Questions
*Where are auxins produced by the plant? How are they transported ?
*What effect do auxins have on shoot growth ?
*Can auxins inhibit root growth? Can they promote root growth? How can
auxin be responsible for both ? *Your book says that auxins promote
growth rather than control it; explain the difference .
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*What uses do auxin sprays have for fruit growers? for control of weeds ?
*In what organism(s) were gibberellins first discovered ?
*What effect does gibberellin have on shoot growth? on root growth? Which group of plants are most
sensitive to gibberellins ? *How are gibberellins used in grape
production? in celery production? in brewing ?
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*What kind of biomolecule is cytokinin? *What effect do cytokinins have on
plant cells? on animal cells ? *In what plants and tissues were
cytokinins discovered? In which tissues are they most commonly
produced ? *Why is ABA called a "growth-
inhibitting hormone"? How is such a hormone useful ?
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*In what tissues or structures does ABA usually function ?
*How does ABA make it easier to ship plants ?
*Which plant hormone is a gas ? *What effect does ethylene have
on flowers, leaves, and fruits? How is ethylene useful to fruit
growers ?
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*From where do plants get most of their nitrogen? In what form ?
*If there is so much nitrogen in the air, then why don't plants make use of it ?
*How does atmospheric nitrogen enter the nitrogen cycle? What organisms
are responsible ? *What are some ways in which
nitrogen is returned to the atmosphere ?
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* How is decay important to the nitrogen cycle?
* What is a biome? * How much of the earth's surface
is tundra? Where is tundra found in North America?
* Describe the climate of the tundra.
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What is the permafrost? Where is it found? What is its effect on tundra vegetation?
What is taiga? What are some other names for the taiga? Where is taiga found in North America?
Describe the climate and vegetation of the taiga.
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Describe the climate and vegetation of a temperate deciduous forest. Where can such forests be found in North America?
How has European immigration affected the deciduous forests of North America?
When do most flowers of the deciduous forest bloom? Why?
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Describe the climate and vegetation of a grassland. Where are they found in North America?
Describe the climate and vegetation of a desert. Where are deserts found in North America?
What adaptations do desert plants have for surviving there?
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What percent of earth's forest are tropical rain forests? Describe the climate of these forests.
What are epiphytes, and how do they survive in tropical rain forests?
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