PLANT-POPULATION HETEROGENEITY AND PATHOGEN AND HERBIVORE LEVELS - A FIELD EXPERIMENT

被引:15
作者
ALEXANDER, HM [1 ]
机构
[1] UNIV KANSAS,DEPT SYSTEMAT & ECOL,LAWRENCE,KS 66045
关键词
PLANT DISEASE; MIXTURE; FREQUENCY-DEPENDENCE; HELIANTHUS-ANNUUS; PUCCINIA-HELIANTHI;
D O I
10.1007/BF00317399
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
The identity of neighbouring plants in a population is thought to affect the disease levels of an individual plant: disease levels are expected to be higher for susceptible plants surrounded by other susceptible plants as compared to susceptible plants that have resistant plants as neighbours. To explore this idea, plants in a natural population of the annual sunflower, Helianthus annuus, were scored in 1988 for levels of the rust pathogen Puccinia helianthi. Progeny of plants with high rust levels (families predicted to be susceptible to the disease) were grown in 1989 in a series of field plots at either high frequency (all plants in a plot of one family) or in low frequency (a plot with plants of many families). There was a positive correlation between rust levels of the parent plants in 1988 and their progeny in 1989, but the frequency of a family in the experimental plots did not affect rust levels. Generally low rust levels at the site, as well as other factors, probably contributed to the absence of a frequency effect. Herbivore levels and plant survival and reproduction varied among plots, but were not affected by the plot composition.
引用
收藏
页码:125 / 131
页数:7
相关论文
共 34 条
[11]  
CALPOUZOS LR, 1976, U MINNESOTA AGR EXPT, V307
[12]  
DINOOR A, 1978, ANNU REV PHYTOPATHOL, V22, P403
[13]  
ELLSTRAND NC, 1978, SYST BOT, V3, P403, DOI 10.2307/2418752
[14]   SEX VERSUS NON-SEX VERSUS PARASITE [J].
HAMILTON, WD .
OIKOS, 1980, 35 (02) :282-290
[15]   EFFECTS OF HABITAT AND POPULATION-STRUCTURE ON POWDERY MILDEW EPIDEMICS IN EXPERIMENTAL PHLOX POPULATIONS [J].
JAROSZ, AM ;
LEVY, M .
PHYTOPATHOLOGY, 1988, 78 (03) :358-362
[16]  
KOLTE SJ, 1985, DISEASES ANN EDIBLE, V3
[17]   RED QUEEN HYPOTHESIS SUPPORTED BY PARASITISM IN SEXUAL AND CLONAL FISH [J].
LIVELY, CM ;
CRADDOCK, C ;
VRIJENHOEK, RC .
NATURE, 1990, 344 (6269) :864-866
[18]   DEVELOPMENT OF CROWN RUST EPIDEMICS IN GENETICALLY DIVERSE OAT POPULATIONS - EFFECT OF GENOTYPE UNIT AREA [J].
MUNDT, CC ;
BROWNING, JA .
PHYTOPATHOLOGY, 1985, 75 (05) :607-610
[19]  
PARKER MA, 1989, EVOLUTION, V43, P540, DOI 10.1111/j.1558-5646.1989.tb04250.x
[20]  
Price P. W., 1980, EVOLUTIONARY BIOL PA