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- Title
PRODUCCIÓN DE CLOROFILA EN Pinus pseudostrobus EN ETAPAS JUVENILES BAJO DIFERENTES AMBIENTES DE DESARROLLO.
- Authors
Cambrón-Sandoval, Víctor Hugo; España-Boquera, María Luisa; Sánchez-Vargas, Nahum M.; Sáenz-Romero, Cuauhtémoc; Vargas-Hernández, J. Jesús; Herrerías-Diego, Yvonne
- Abstract
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.
- Publication
Revista Chapingo Serie Ciencias Forestales, 2011, Vol 17, Issue 2, p253
- ISSN
2007-3828
- Publication type
Article
- DOI
10.5154/r.rchscfa.2010.09.077