Dictionary » A » Abscission



(Science: botany) The normal shedding from a plant of an organ that is mature or aged, for example a ripe fruit, an old leaf. Adj. Abscissile. Shedding of flowers and leaves and fruit following formation of scar tissue in a plant.The act of cutting something off.A plant process that initiates the removal or part of the plant in cases of aging or infection. This process is controlled primarily by 3 compounds, namely auxin, ethylene and abscisic acid. Human medicine incorporates the idea of abscission in the form of an amputation, where a badly infected area of the body is amputated to prevent infection spreading towards more vital and uninfected areas of the body.

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The effect of cellulase on E. Coli

I know that Cellulase enzymes that break down cellulose and are involved in cell wall breakdown in higher plants, especially during abscission. Produced in large amounts by certain fungi and bacteria. degradation of cellulose microfibrils requires the concerted action of several cellulases.

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by bellyjelly
Fri Jul 15, 2011 5:24 am
Forum: Microbiology
Topic: The effect of cellulase on E. Coli
Replies: 9
Views: 7599

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: 3053

What role does leaf shape play in dispersal?

... 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 between those leaves ...

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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: 7426


... but inhibits growth in lateral buds c) promotes formation of lateral and adventitious roots d) regulate fruit development e) delay onset of leaf abscission gibberellins a) regulate stem elongation b) enhances bolting c)promotes growth of dormant bud d) induces maleness in flower e) stimulate ...

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by aileen
Sat Feb 11, 2006 1:05 pm
Forum: Botany Discussion
Topic: phytohormones
Replies: 2
Views: 3208

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