撰稿人: 日期:2010-12-9 点击次数:3441


《Science》:Plants Integrate Information About Nutrients and Neighbors

Animals regularly integrate information about the location of resources and the presence
of competitors, altering their foraging behavior accordingly. We studied the annual plant
Abutilon theophrasti to determine whether a plant can demonstrate a similarly complex response
to two conditions: presence of a competitor and heterogeneous resource distributions.
Individually grown plants fully explored the pot using a broad and uniform rooting distribution
regardless of soil resource distributions. Plants with competitors and uniform soil nutrient
distributions exhibited pronounced reductions in rooting breadth and spatial soil segregation
among the competing individuals. In contrast, plants with competitors and heterogeneous soil
nutrient distributions reduced their root growth only modestly, indicating that plants synthesize
information about both neighbor and resource distributions in determining their root behavior.