SIGNALING AMONG NEIGHBORING PLANTS AND THE DEVELOPMENT OF SIZE INEQUALITIES IN PLANT-POPULATIONS

被引:83
作者
BALLARE, CL
SCOPEL, AL
JORDAN, ET
VIERSTRA, RD
机构
[1] OREGON STATE UNIV,DEPT FOREST SCI,CORVALLIS,OR 97331
[2] UNIV WISCONSIN,DEPT HORT,MADISON,WI 53706
关键词
PLANT CANOPIES; PLANT COMPETITION; PHYTOCHROME; SENSORY ECOLOGY;
D O I
10.1073/pnas.91.21.10094
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
Transgenic tobacco plants that express an oat phytochrome gene (phyA) under control of the cauliflower mosaic virus (CaMV) 355 promoter and display altered photophysiology were used to test the role of light as a vehicle of information in dominance relationships between neighboring plants. Compared with the isogenic wild type, phyA-overexpressing plants showed dramatically reduced morphological responsivity to changes in the red/far red ratio of the incident light and to the proximity of neighboring plants in spacing experiments. In transgenic canopies an increase in stand density caused the small plants of the population to be rapidly suppressed by their neighbors. In wild-type canopies, plants responded to increased density with large morphological changes, and there appeared to be an inverse relationship between the magnitude of this morphological response and the ranking of the individual plant in the population size hierarchy. In these wild-type populations, size inequality increased only moderately with density within the time frame of the experiments. Our results suggest that, in crowded stands, the ability of individual plants to acquire information about their light environment via phytochrome plays a central role in driving architectural changes that, at the population level, delay the development of size differences between neighbors.
引用
收藏
页码:10094 / 10098
页数:5
相关论文
共 38 条
[1]  
[Anonymous], 1977, POPULATION BIOL PLAN
[2]  
Ballare C.L., 1994, EXPLOITATION ENV HET, P73
[3]   PHYTOCHROME-MEDIATED PHOTOTROPISM IN DEETIOLATED SEEDLINGS - OCCURRENCE AND ECOLOGICAL SIGNIFICANCE [J].
BALLARE, CL ;
SCOPEL, AL ;
RADOSEVICH, SR ;
KENDRICK, RE .
PLANT PHYSIOLOGY, 1992, 100 (01) :170-177
[4]   PHOTOMORPHOGENIC PROCESSES IN THE AGRICULTURAL ENVIRONMENT [J].
BALLARE, CL ;
SCOPEL, AL ;
SANCHEZ, RA ;
RADOSEVICH, SR .
PHOTOCHEMISTRY AND PHOTOBIOLOGY, 1992, 56 (05) :777-788
[5]   MORPHOLOGICAL RESPONSES OF DATURA-FEROX L SEEDLINGS TO THE PRESENCE OF NEIGHBORS - THEIR RELATIONSHIPS WITH CANOPY MICROCLIMATE [J].
BALLARE, CL ;
SANCHEZ, RA ;
SCOPEL, AL ;
GHERSA, CM .
OECOLOGIA, 1988, 76 (02) :288-293
[6]   FAR-RED RADIATION REFLECTED FROM ADJACENT LEAVES - AN EARLY SIGNAL OF COMPETITION IN PLANT CANOPIES [J].
BALLARE, CL ;
SCOPEL, AL ;
SANCHEZ, RA .
SCIENCE, 1990, 247 (4940) :329-332
[7]  
BALLARE CL, 1987, PLANT CELL ENVIRON, V10, P551, DOI 10.1111/j.1365-3040.1987.tb01835.x
[8]   RESPONSES OF LIGHT-GROWN WILD-TYPE AND LONG-HYPOCOTYL MUTANT CUCUMBER SEEDLINGS TO NATURAL AND SIMULATED SHADE LIGHT [J].
BALLARE, CL ;
CASAL, JJ ;
KENDRICK, RE .
PHOTOCHEMISTRY AND PHOTOBIOLOGY, 1991, 54 (05) :819-826
[9]   ON THE OPPORTUNITY COST OF THE PHOTOSYNTHATE INVESTED IN STEM ELONGATION REACTIONS MEDIATED BY PHYTOCHROME [J].
BALLARE, CL ;
SCOPEL, AL ;
SANCHEZ, RA .
OECOLOGIA, 1991, 86 (04) :561-567
[10]  
BRADFORD MM, 1976, ANAL BIOCHEM, V72, P248, DOI 10.1016/0003-2697(76)90527-3