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Ethylene

Ethylene

(Science: chemical plant biology) plant growth substance (phytohormone, plant hormone), involved in promoting growth, epinasty, fruit ripening, senescence and breaking of dormancy. Its action is closely linked with that of auxin. A flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic.Ethylene is a type of hydrocarbon that can act as a plant hormone. In plants, it prevents cells from elongating and promotes leaf Abscission, while sometimes being responsible for the ripening of fruit.


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Energy in apoptosis

... enzymes to be made in order to digest and kill the entire cell. Well, that's my hypothesis. I really don't know why, but I know that a burst of ethylene in plants trigger apoptosis to soften and ripen fruit, and the cell death destroys the webbing between your fingers while you're a fetus so ...

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by Picaq
Sun Apr 12, 2009 10:37 pm
 
Forum: Cell Biology
Topic: Energy in apoptosis
Replies: 2
Views: 295

Plant Regulators

... My first question is on cytokinins... are they produced more during the day/light response or are they a dark response similar to auxins and ethylene? Auxins and ethylenes are produced in excess during the dark hours/low light, whatever, I believe this is because the plant (in short) actually ...

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by skunk
Wed Jul 30, 2008 1:38 pm
 
Forum: Botany Discussion
Topic: Plant Regulators
Replies: 0
Views: 773

Plants dying

In the fall only some grasses dye. Tries only lose their leaves(google for leaf abscission and ethylene).

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by MrMistery
Wed Jan 30, 2008 12:15 pm
 
Forum: Botany Discussion
Topic: Plants dying
Replies: 2
Views: 1150

What role does leaf shape play in dispersal?

... everywhere dropping their trees at the same moment!) Why isn't the reduction in the auxin produced in the leaf which leads to the liberation of ethylene and subsequently abscission triggered uniformly? I thought it might have something to do with the age of the leaf and that I would see a difference ...

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by botanygirl
Thu Oct 25, 2007 4:06 pm
 
Forum: Botany Discussion
Topic: What role does leaf shape play in dispersal?
Replies: 9
Views: 2060

How does the seed know which direction to sprout?

Good question My guess is they will grow in whatever direction they happen to begin growing unless they hit an obstacle(and ethylene directs the plant going round it) or there is a unidirectional source of light(case in which phototropism takes over: the stem grows towards the light ...

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by MrMistery
Mon Sep 10, 2007 5:35 pm
 
Forum: Botany Discussion
Topic: How does the seed know which direction to sprout?
Replies: 5
Views: 1511
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