Intraspecific variability in Commelina erecta: Response to phosphorus addition

To examine intraspecific variability, we studied the biomass production and physiological responses of clonal replicates of the widespread perennial herb Commelina erecta L. grown under different phosphorus concentrations. Five replicates per genotype collected from a small population were exposed t...

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Autor principal: Urich, R.
Otros Autores: Coronel, I., Silva, D., Cuberos, M., Wulff, R.D
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2003
Acceso en línea:Registro en Scopus
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030 |a CJBOA 
100 1 |a Urich, R. 
245 1 0 |a Intraspecific variability in Commelina erecta: Response to phosphorus addition 
260 |c 2003 
270 1 0 |m Urich, R.; Inst. de Biol. Experimental, Universidad Central de Venezuela, Apartado 47114, Caracas 1041A, Venezuela; email: rurich@cantv.net 
506 |2 openaire  |e Política editorial 
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520 3 |a To examine intraspecific variability, we studied the biomass production and physiological responses of clonal replicates of the widespread perennial herb Commelina erecta L. grown under different phosphorus concentrations. Five replicates per genotype collected from a small population were exposed to 0.01 or 1.0 mmol·L-1 phosphate in a hydroponic solution and grown under natural radiation. High intraspecific variability occurred for ecologically important traits such as root, leaf, and total plant biomass, with significantly higher responses in the high phosphorus treatment. The norms of reaction for high versus low phosphorus supply often crossed, indicating that selection for different genotypes may be enhanced in some environments and reduced in others. The root phosphorus concentration and phosphorus absorption rate varied among clones. Phosphorus supply increased photosynthetic rates in all clones 15 days after the start of the experiment, but treatment differences were lost with development when significant clone variability was observed. Maximum photosynthetic rates and carboxylation efficiencies were different between clones and treatments; relative stomatal and mesophyll limitations to photosynthesis also varied among clones. Predawn photochemical efficiency remained relatively constant among treatments and clones. Commelina erecta showed a very high intraspecific variability, which is an important factor in plant survival and success.  |l eng 
593 |a Inst. de Biol. Experimental, Universidad Central de Venezuela, Apartado 47114, Caracas 1041A, Venezuela 
593 |a Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina 
690 1 0 |a GROWTH 
690 1 0 |a NORMS OF REACTION 
690 1 0 |a PHOSPHORUS ABSORPTION 
690 1 0 |a PHOTOSYNTHESIS 
690 1 0 |a ABSORPTION 
690 1 0 |a BIOMASS 
690 1 0 |a CARBOXYLATION 
690 1 0 |a PHOSPHORUS 
690 1 0 |a COMMELINA ERECTA 
690 1 0 |a PLANTS (BOTANY) 
690 1 0 |a BIOMASS 
690 1 0 |a HERB 
690 1 0 |a INTRASPECIFIC VARIATION 
690 1 0 |a PHOSPHORUS 
690 1 0 |a PHOTOSYNTHESIS 
690 1 0 |a PHYSIOLOGICAL RESPONSE 
690 1 0 |a COMMELINA 
690 1 0 |a COMMELINA ERECTA 
700 1 |a Coronel, I. 
700 1 |a Silva, D. 
700 1 |a Cuberos, M. 
700 1 |a Wulff, R.D. 
773 0 |d 2003  |g v. 81  |h pp. 945-955  |k n. 9  |p Can. J. Bot.  |x 00084026  |w (AR-BaUEN)CENRE-179  |t Canadian Journal of Botany 
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