How plants protect themselves by emitting scent cues for birds

Date: August 15, 2018

Source: University of Delaware

Summary:

When plants are in distress or being fed on by insects, they have been known to send out sensory volatile cues that alert organisms in the area -- such as birds -- that they are in need of help. While research has shown that this occurs in ecosystems such as forests, until now, this phenomenon has never been demonstrated in an agricultural setting.Researchers at the University of Delaware have recently found that agricultural plants also send out these signals when under duress from insects, opening new potential avenues for growers to defend their crops while at the same time providing a much-needed food source for birds.

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Plants hitch a lift on migrating birds

12 June 2014 Last updated at 12:11

By Zoe Gough

Reporter, BBC Nature

Birds migrating between the Arctic and South America could be responsible for distributing plants across the tropics, according to new research.

Scientists screened wild shorebirds' feathers before migration and found plant parts embedded.

Birds are known to disperse seeds and small animals across local, regional and continental ranges.

It is the first evidence of plant fragments being carried in the plumage of long-distance migratory birds.

A team of ten biologists captured birds at their arctic breeding grounds and examined their breast feathers under a microscope.

Their findings are reported in the journal PeerJ.

They found 23 plant fragments trapped in the feathers of seven of the birds.

The plant parts were all thought to be able to grow into new plants, therefore suggesting they could establish new populations.

If the findings are applied to entire populations of migratory birds, potentially hundreds of thousands of plant parts may be being transported across the equator every year.

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