Effect of Dust Deposition on Stomatal Conductance and Leaf Temperature of Cotton in Northwest China

Abstract

Abstract:The Xinjiang Region in Northwest China is known as the "dust center" of the Eurasian mainland. Dust on the leaf surface affects overall plant development. While emphasis was on studying the impacts of industrial dust particles on crop development, the effect of natural dust deposition on the physiological parameters of cotton had not been studied before. The objective of this study was to examine the effects of dust deposits on cotton leaves and to estimate their impact on crop development and yield. For this purpose, an experiment was set up having two treatments and a control. In Treatment 1, cotton leaves were cleaned with water at three-day intervals or after a natural dust fall. In Treatment 2, 100 g·m −2 of dust was applied at 10-day intervals. The control received neither additional dust nor cleaning. In all of the treatments, stomatal conductance, leaf temperature, biomass and yield were measured. The results show a 28% reduction in yield and 30% reduction in OPEN ACCESSWater 2015, 7 117 stomatal conductance of the dust treatment compared to the control treatment. This indicates blocking of the stomata on the top of the leaf surface. In addition, the canopy temperature of the dust-applied leaves was always higher than the control and treatment.

Large-Scale Hydrological Modeling and Decision-Making for Agricultural Water Consumption and Allocation in the Main Stem Tarim River, China

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Quantifying the Road Influence Zone on Socio‐economic Developments in Rural Tigray, Ethiopia

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Investigating and comparing short period impact of dust on physiological characteristics of three species of Pinus eldarica, Cupressus sempervirens, and Ligustrum ovalifolium

“…Research results of Kumar andThambavani (2012) andFarmer (1993) showed that dust affects photosynthesis rate and transpiration because of the accumulation of dust on the plant surface that are raised as the physical effects of dust. The physical effects of dust loaded on the surface of the leaves consist of stomatal closure, shading, increased temperature of leaves and removal the cuticle wax, reduced growth and production of plants, reduced photosynthesis, and ultimately would lead to cell death or the dried plant, which is in contrasts with the results of Zia-Khan et al (2012). A 30 % reduction in the stomatal conductance of the dust-treated plants as compared to the control plants shows the blocking of the stomata on the top leaf surface due to the shading effect caused by the dust layer, which decreased the overall net photosynthesis rate soon after the dust was applied.…”