By Peter J. Holloway (auth.), Kevin E. Percy, J. Neil Cape, Richard Jagels, Caroline J. Simpson (eds.)
Plant leaves are coated by means of a skinny, lipoidal, non-living membrane referred to as the cuticle. Forming the interface among crops and the atmospheric setting, it offers an efficient barrier to pollutant access.
The booklet offers a complete assessment of air pollutant results at the cuticle and covers the next thematic parts: - Cuticular physicochemical features, physiological, regulatory, and protecting roles. - results, mechanisms, and effects of air pollutant interplay with leaf cuticles. - Non-anthropogenic and environmental affects at the cuticle and strength of the cuticle for biomonitoring and demanding degrees mapping. - New advancements in experimental method and analytical techniques.
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Additional resources for Air Pollutants and the Leaf Cuticle
Models for simulating photosynthesis have gone through a significant evolution. The simplest models calculate C02 flux into the leaf as in Eq. 1 modified for the physiochemical characteristics of C02. Such a treatment solely describes diffusion into the leaf through the stomata based on the C02 partial pressure gradient between the atmosphere and the leaf interior. While this allows C02 to enter the leaf, it ignores the physiological complexities of stomata and carbon metabolism that control photosynthetic C02 demand.
A "bottom up" approach from the level of the leaf interior and emphasizing leaf-level morphology and biochemistry is emerging. There are fundamental differences in the processes governing deposition from the "top down" versus the "bottom up" perspective; the two-layer stagnant film model provides a conceptual framework for developing the "bottom up" approach. Third, there are many processes controlling pollutant deposition that are common among pollutants, and this has fostered the development and application of analog models based on the pathways for water vapor and C02.
Kerstiens and Lendzian (1989b) and recently Charnel et al. ) cuticles were associated with cuticular polysaccharides. Mean water uptake was closely correlated with mean polysaccharide content offour species (Kerstiens and Lendzian, 1989b). The same was found to be true for the six species examined by Charnel et ai. , 1993). Charnel et al. (1992), however, found no correlation between mean polysaccharide content of fir needles from different trees and their water uptake. Haas (1974) discovered that polysaccharide content of tomato fruit cuticles was correlated with their water permeability.