Depending on variety, wheat may be awned or not awned. Producing awns incurs a cost in grain number, but wheat awns photosynthesise more efficiently than their leaves with regards to water usage, so awns are much more frequent in varieties of wheat grown in hot drought-prone countries than those generally seen in temperate countries. For this reason, awned varieties could become more widely grown due to climate change. In Europe, however, a decline in climate resilience of wheat has been observed.
Depending on va.riety wheat may be awned or not awned Producing awns incurs a cost in grain number but wheat awns photosyn!thesise more efficiently than their leaves with regards to water usage so awns are much more frequent in varieties of wheat grown in hot drought-prone countries than those generally seen in temperate countries For this reason awned varieties could become more widely grown due to climate change In Europe howeve!r a decline in climate resilience of wheat has been observed