Revista Chapingo Serie Ciencias Forestales y del Ambiente
Universidad Autónoma Chapingo
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Revista Chapingo Serie Ciencias Forestales y del Ambiente
Volume XVII, issue 2, May - August 2011


Víctor Hugo Cambrón-Sandoval; María Luisa España-Boquera; Nahum M. Sánchez-Vargas; Cuauhtémoc Sáenz-Romero; J. Jesús Vargas-Hernández; Yvonne Herrerías-Diego

Received: 2010-09-14

Accepted: 2011-01-24

Available online: / pages.253-260


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  • descriptionAbstract

    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 (P0.05) were observed be¬tween 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.

    Keyworks: Half-sib families; total chlorophyll, a chlorophyll, b chlorophyll, a/b chlorophyll, competition environment.
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  • starCite article

    Cambrón-Sandoval, V. H.,  España-Boquera, M. L.,  Sánchez-Vargas, N. M.,  Sáenz-Romero, C., Vargas-Hernández, J. J.,  &  Herrerías-Diego, Y. (2011).  CHLOROPHYLL PRODUCTION IN Pinus pseudostrobus JUVENILES UNDER DIFFERENT DEVELOPMENT ENVIRONMENTS. Revista Chapingo Serie Ciencias Forestales y del Ambiente, XVII(2), 253-260.