New light shed on flowers' 'petal-dropping' processes

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New light shed on flowers' 'petal-dropping' processes

A new study has shed new light on the process, known as abscission, that governs how and when plants shed their petals.



Washington: A new study has shed new light on the process, known as abscission, that governs how and when plants shed their petals.

Lead author O Rahul Patharkar from the University of Missouri said that insight into the process of floral abscission in the model plant Arabidopsis thaliana provides a foundation for understanding this fundamental process across organs and in other plant species.

The earliest steps of abscission involve changes in a special layer of cells, called the abscission zone, at the base of the flower and as a flower matures, cells in this layer begin to separate from one another along the entire length of this zone, creating a clean rift between the base of the flower and the petals. As the rift enlarges, the petals will fall off and be sent tumbling to the ground.

Patharkar added that they know that when a plant is a little ways away from abscising its petals the activation of genes is already beginning. A lot of this gene activity, which they call transcription, is exponentially increased in a relatively short time, which ultimately leads to abscission.


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