%0 Journal Article
%T Producci¨®n de clorofila en Pinus pseudostrobus en etapas juveniles bajo diferentes ambientes de desarrollo
%A Cambr¨®n-Sandoval
%A V¨ªctor Hugo
%A Espa£¿a-Boquera
%A Mar¨ªa Luisa
%A S¨¢nchez-Vargas
%A Nahum M.
%A S¨¢enz-Romero
%A Cuauht¨¦moc
%A Vargas-Hern¨¢ndez
%A J. Jes¨²s
%A Herrer¨ªas-Diego
%A Yvonne
%J Revista Chapingo. Serie ciencias forestales y del ambiente
%D 2011
%I Scientific Electronic Library Online
%R 10.5154/r.rchscfa.2010.09.077
%X limiting the amount of sun radiation reduces photosynthetic activity, causing stress and morphological and/or physiological changes in plant development. this study analyzed the stress effect caused by two levels of competition in pinus pseudostrobus lindl half-sib families: high inter-family (environment ii) and high intra-family (environment iii) competition, compared with a low level of competition (environment i). total chlorophyll, chlorophyll-a, and chlorophyll-b content, plus the chlorophyll a/b ratio, were quantified as an indicator of stress level in 10-month-old plants using the barnes method. plants were established in a common garden test under a split-plot design with four replications and three individuals per plot. total chlorophyll was significantly higher (p<0.05) in environment i; no differences (p>0.05) were observed between the other competition environments. a separate analysis of chlorophylls showed lower chlorophyll-a content in plants surrounded by genetically-similar plants (environment iii) as opposed to genetically-different ones (environment ii); conversely, chlorophyll-b content was higher in genetically-similar plants (environment iii). in conclusion, intra-genotypic competition was generally stronger than inter-genotypic competition, under high levels of stress.
%K half-sib families
%K total chlorophyll
%K a chlorophyll
%K b chlorophyll
%K a/b chlorophyll
%K competition environment.
%U http://www.scielo.org.mx/scielo.php?script=sci_abstract&pid=S0186-32312011000200008&lng=en&nrm=iso&tlng=en