AUDESIRK BIOLOGIA LA VIDA EN LA TIERRA DOWNLOAD
Organismos Anaeróbicos Los estrictos y los facultativos. Bibliografia: Biologia 1, " La vida en la tierra con fisiologia" Teresa Audesirk. Biologia 1. Biology: Life on Earth with Physiology by Bruce E. Byers, Teresa Audesirk and Gerald Also available with MasteringBiology(tm) MasteringBiology is an online . Teresa Audesirk (Author), Bruce E. Byers (Author) & 0 more. Mastering Biology with Pearson eText -- Standalone Access Card -- for Biology: Life on Earth. Mastering Biology without Pearson eText for -- Virtual Lab Full Suite.
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This allocation behavior was observed in this study. Results obtained for the shoot: According to Villar-Salvadora shoot: The core of this theory is that plants shift their allocation towards shoots if the carbon gain of the shoot is impaired by a low level of above-ground resources, such as light and CO2.
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Similarly, plants shift allocation towards roots when there is a low level of below-ground resources, such as nutrients or water. These shifts could be seen as adaptive, as they enable the plant to capture more of those resources that most strongly limit plant growth Poorter and Nagel As functional attributes will determine the survival and growth of planted N. Effect of shading and fertilizer on morphological attributes of container-grown Nothofagus leonii seedlings.
Effect of shading and fertilizer on quality indices of container-grown Nothofagus leonii seedlings. The slenderness ratio, in which low values i. This implies higher transpiration rate and water consumption. The Dickson index has been successfully used to predict field performance of various conifer species Ritchie ; however, Gonzalez et al.
The values obtained in this study are comparable to those obtained by Santelices et al.
Specific leaf area was larger with increasing shade level, consistent with Santelices et al. Minotta and Pinzauti reported similar results in Fagus sylvatica L.
A highly specific leaf area value implies a higher number of chloroplasts and enzymes and enhances photosynthetic capacity per unit leaf area Evans and Poorter On the other hand, Sims et al.
In the physiological response, the study showed that the shading treatment directly affects the chlorophyll fluorescence table 3. In the case of chlorophyll a content, differences were only observed for the shading treatments. In general, shade plants have more chlorophyll, which is coincident with results of this study. Plants treated with moderate shade i.
Evans and Poorter found similar results i. This would indicate a more important amount of photosystem II reaction centers and increased photosynthetic efficiency in N. Plants that receive high irradiance develop a thicker palisade parenchyma to protect the mesophyll from a very high radiation. Thus, with high radiation levels, N. Effect of shading and fertilizer on physiological attributes of container-grown Nothofagus leonii seedlings. Effect of fertilizer doses.
There were no significant differences in seedling growth resulting from differences in fertilizer doses, which agrees with Santelices et al. Nutrient availability affects plant biomass allocation, and an increased amount of nutrients often decreases root biomass allocation Poorter and Nagel However, in this study and similar to Klooster et al. As we did not measure tissue nutrient concentration we speculate that N.
Thus, it may be possible that increased internal nutrient reserves resulting from nutrient loading in N. We did not find a decrease in plant growth while increasing nutrient content, thus our results also suggest that the toxicity level described by Salifu and Jacobs was not reached.
The chlorophyll a content gives an indirect estimation of plant nutritional status because much of the leaf nitrogen is incorporated in chlorophyll Moran et al.
All three fertilizer doses analyzed in this study give an adequate amount of nitrogen to be incorporated into the chlorophyll a production; however, 6 g L-1 could be a suitable dose in N.
This could imply an increase in the photosynthetic efficiency. Better development is achieved with an intermediate level of light intensity. There was no clear effect on seedlings growth due to the different doses of slow-release fertilizer. The authors appreciate the valuable collaboration of Forest Engineer Claudia Soto Lagos in collecting nursery data. We are also indebted with Dr. Anne Bliss for her valuable corrections of English grammar.
In Howard J ed. Libro rojo de la flora terrestre de Chile Primera parte. Ambiente y Desarrollo Bustamante R, C Castor. The decline of an endangered temperate ecosystem: Biodiversity and Conservation 7: Responses to different quantum flux densities. Physiological Plant Ecology I. Responses to the Physical Environment.
Encyclopedia of Plant Physiology. Informe Nacional con Variables Ambientales. Changes during early development in photosynthetic light acclimation capacity explain the shade to sun transition in Nothofagus nitida. The role of nutrients for improving seedling quality in drylands.