Yes. Jessica, at NCSU's Genetics Department, has properly named this as "fasciation," and suggested that it is frequently the result of environmental factors, such as physical damage or infection. The fasciated GRIN Unknown (likely Izmir) that I grew in 2015 seemed to be the result of a genetic predisposition, although I was unable to propagate seeds from those plants in 2016 to verify this.
On one of my pear trees, a single, small branch about half-way up displays fasciation. I assume that to be from infection-induced genetic damage--likely fireblight in a resistant variety.
It would be interesting to learn from the Indonesian farmer if other leaves on that same plant exhibited fasciation.
Bob
On one of my pear trees, a single, small branch about half-way up displays fasciation. I assume that to be from infection-induced genetic damage--likely fireblight in a resistant variety.
It would be interesting to learn from the Indonesian farmer if other leaves on that same plant exhibited fasciation.
Bob