Effect of Light Intensity on Leaf Photosynthetic Characteristics and Accumulation of Flavonoids in Lithocarpus litseifolius Hance Chun. FagaceaeReportar como inadecuado




Effect of Light Intensity on Leaf Photosynthetic Characteristics and Accumulation of Flavonoids in Lithocarpus litseifolius Hance Chun. Fagaceae - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

The active compounds in herb drugs are mainly secondary metabolites,which are greatly influenced by external conditions. Particularly, lightintensity has a great influence on the photosynthesis and accumulation of secondarymetabolites. In this study, the light intensity was changed, and the influenceof the light intensity on leaf photosynthetic characteristics, antioxidantenzyme activity and flavone contents of Lithocarpuslitseifoliusp Hance Chun. was discussed. The results showed that 1 L. litseifolius is a typical heliophyte.As the light intensity decreased, the contents of chlorophyll a Chl a,chlorophyll b Chl b and total chlorophyll Chl a + b all increased. However,the Chl a-b ratio gradually decreased. The daily variation of netphotosynthetic rate changed from a double-peak curve under natural light tosingle-peak curve under 20% full light two shading nets. 2 As the lightintensity decreased, the SOD and POD activities and the soluble proteinscontent decreased in the leaves. In contrast, the malondialdehyde contentincreased. 3 The flavone content was the highest in leaves at one shading nets 60% of fulllight, and the lowest occurred in leaves at two shading nets 20% of full light. Acomprehensive analysis indicated that an appropriate shading could induce shadetolerance in the leaves of L.litseifolius, which promoted the accumulation of flavonoids. L. litseifolius should be planted in thelower position of sunny slope or the upper position of shady slope to increasethe content of flavone in the leaves.

KEYWORDS

Lithocarpus litseifolius Hance Chun., Light Intensity, Photosynthetic Characteristics, Antioxidant Enzyme Activity, Flavones Content, Cultivation

Cite this paper

Li, A. , Li, S. , Wu, X. , Zhang, J. , He, A. , Zhao, G. and Yang, X. 2016 Effect of Light Intensity on Leaf Photosynthetic Characteristics and Accumulation of Flavonoids in Lithocarpus litseifolius Hance Chun. Fagaceae. Open Journal of Forestry, 6, 445-459. doi: 10.4236-ojf.2016.65034.





Autor: Aimin Li1,2,3, Shenghua Li1,2,3, Xianjin Wu1,2,3*, Jian Zhang1,2,3, Anna He1,2,3, Guang Zhao1, Xu Yang1

Fuente: http://www.scirp.org/



DESCARGAR PDF




Documentos relacionados