Taking a Look at Plant Abscission

1233 Words Jan 28th, 2018 5 Pages
Plants may undergo this process of abscission in the purpose of either to discard its part that is no longer necessary, such as a leaf during autumn, or a flower following fertilisation or even for the purposes of reproduction. Most deciduous plants drop their leaves by abscission before winter, whereas evergreen plants abscise their leaves continuously. Another form of abscission is fruit drop, where the plant abscises fruit while still immature in order to conserve resources required to bring the remaining fruit to maturity. If a leaf is damaged, a plant may also abscise it to conserve water or photosynthetic efficiency, depending on the trade-off to the plant as a whole.
In most of the plants, this process of abscission may occur in a rather specific part of the abscising organ called the abscission zone. The abscission zone may apparent throughout the whole life of the plant or it may become obvious as the time of abscission approaches, usually as a lighter coloured, slightly swollen or shrinking area. The abscission zone typically comprises a plate of thin walled, narrow cells which are differentiated clearly from the isodiametric cells of the pedicel. These cells begin the stage or a phase of intense activity immediately prior the start of physical separation of the abscising plant parts.
However, this shedding or dropping of plant parts such as…

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