Effects of Chloride Stress on Chlorophyll Content and Antioxidant System in Leaves of Young Tea Plant
LI Chun-lei
Abstract：In order to investigate the inj ury mechanism of chlorine stress to tea plant and provide the scientific reference for reasonable application of chlorine fertilizer to young tea plant,1-year-old seedlings of the Longjing 43 variety of tea(Camellia sinensis L.)were grown hydroponically to study the effect on chlorophyll content and antioxidant system at different concentrations of chlorine(Cl ).The results showed that the content of chlorophyll a,chlorophyll b and total chlorophyll decreased significantly with Cl concentration increasing;their contents decreased by 36.2%,22.7% and 33.1% compared to CK(0 mmol/L)respectively at 100 mmol/L Cl.SOD, POD activities showed an initial increase followed by a decrease with Cl concentration increasing, reached their peaks when the Cl concentration was 40 mmol/L,and their activities increased by 10.8% and 9.2% compared to CK respectively.CAT activity decreased continuously with Cl concentration increasing and it decreased largest by 45.4% compared with the control at 100 mmol/L Cl.At the same time,the contents of MDA,H2 O2 and proline increased obviously with the increasing of Cl concentration.These results suggested that at higher Cl concentrations,the Cl stress could mangle the cytomembrane system,and functions of the maj or organelles of tea plant. However,slight Cl stress hardly damaged young tea plant because MDA content had not significant difference at low Cl concentration (20 mmol/L ) compared to CK.Therefore,Cl fertilizer concentration applied to young tea plant should be less than 20 mmol/L.
Keywords：Camellia sinensis L.chlorine stressantioxidant enzymeprolinemalondialdehyde
Publication Date：2014-09-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 56-59,65 )