Starbucks saidit plans an unspecified number of layoffs as it restructures its corporate staff.

In a letter to employees, Starbucks Chairman and CEO Brian Niccol said the Seattle coffee giant needs to ensure all work has a clear and accountable owner who can make decisions. The company also needs to reduce complexity and silos.

The layoffs won’t impact baristas in Starbucks’ stores. Niccol said decisions will be communicated by early March.

In the quest to make apple trees more resilient in a warming climate, some Michigan researchers are looking for a late bloomer.

A native Michigan apple tree, the Malus coronaria, learned to fight frost by blooming two or three weeks later than the trees that produce cultivated varieties of apples like Honeycrisp or Red Delicious.

“That doesn’t sound like a lot, but almost always that’s enough for the flowers to escape the killing spring frost,” said Steve van Nocker, a Michigan State University professor and plant geneticist.

Van Nocker wants to identify the genes responsible for the Malus coronaria’s delayed blooms and use them to develop more frost-resistant apple varieties, a decades-long process.

University of Maryland researchers recently announced the development of a more heat-tolerant apple variety. At Penn State University, a team built an unmanned vehicle with a propane-fueled heater that can roll through an orchard and automatically warm trees.