ROOT COMMUNICATION AMONG DESERT SHRUBS

被引:204
作者
MAHALL, BE
CALLAWAY, RM
机构
关键词
COMPETITION; INTERFERENCE; SELF-NONSELF RECOGNITION; ALLELOPATHY; ROOT EXUDATES;
D O I
10.1073/pnas.88.3.874
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Descriptive and experimental studies of desert shrub distributions have revealed important questions about the mechanisms by which plants interact. For example, do roots interact by mechanisms other than simple competition for limiting resources? We investigated this question using the desert shrubs Ambrosia dumosa and Larrea tridentata grown in chambers that allowed observation of roots during intraplant and intra- and interspecific interplant encounters. Two types of root "communication" were revealed. Ambrosia root systems appear to be capable of detecting and avoiding other Ambrosia root systems, whereas Larrea roots inhibit Larrea and Ambrosia roots in their vicinity.
引用
收藏
页码:874 / 876
页数:3
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