Resource sharing among ramets in the clonal herb, Fragaria chiloensis.

Area of Science:

• Plant Biology
• Ecology
• Physiology

Background:

• Fragaria chiloensis, a coastal dune plant, reproduces vegetatively via stolons and rosettes.
• Stolons connect rosettes, integrating their water and carbon metabolism.

Purpose of the Study:

• To investigate resource sharing and physiological integration in Fragaria chiloensis clones.
• To understand how stolon connections affect rosette survival and growth under varying conditions.

Main Methods:

• Observational study of Fragaria chiloensis clones in California coastal sand dunes.
• Monitoring water and photosynthate movement through stolons.
• Assessing rosette growth, rooting, and survival under simulated shade and drought.

Main Results:

• Unrooted rosettes imported water and nitrogen without impacting sibling growth under optimal conditions.
• Shade and drought induced photosynthate import in rosettes.
• Connected rosettes showed increased survival under drought and shade compared to isolated rosettes.
• Stolon connections prevented clone death when individual rosettes could not survive alone.

Conclusions:

• Physiological integration via stolons enhances clone growth and survival in Fragaria chiloensis.
• Resource sharing among ramets is crucial for adaptation to variable or patchy environments.
• Stolon connections are vital for maintaining clone integrity and resilience.