Relationship Between Lutein Deficit and Light Allocation as well as Antioxidants in Tomato

ACTA HORTICULTURAE SINICA ›› 2007, Vol. 34 ›› Issue (5): 1301-1304.

• 研究报告 • Previous Articles Next Articles

Relationship Between Lutein Deficit and Light Allocation as well as Antioxidants in Tomato

WANG Yan-jie¹;XIA Xiao-jian¹; ZHOU Yan-hong¹; YU Jing-quan^1,2*

(¹ Department of Horticulture, Zhejiang University, Hangzhou 310029, China; ² Key Laboratory of Horticultural Plants Growth, Development and Biotechnology, Agricultural Ministry of China, Hangzhou 310029, China )

Received:1900-01-01 Revised:1900-01-01 Online:2007-10-25 Published:2007-10-25

Abstract

Abstract: A lutein deficit mutant (Xa) of tomato (Lycopersicon esculentum Mill.) was used to study the relationship between xanthophylls cycle and light allocation as well as antioxidant levels. Xa mutant showed significantly lower nonphotochemical quenching (qN), ΔpH and xanthophyllregulated thermal energy dissipation (J_NPQ) than those of Ailsa Craig, but similar net photosynthesis rate (Pn), carboxylation efficiency (CE) and photochemical quenching (qP) to those of Ailsa Craig. Moreover, Xa mutant exhibited increased activities of most antioxidant enzymes in cellular organelles and higher antioxidants contents in the leaves as compared to Ailsa Craig. All these results suggested that Xa mutant protected plant cells from photooxidation damage mainly by decreasing light adsorption and increasing antioxidant capacity.

Key words: Lycopersicon esculentum Mill., Mutant, Nonphotochemical quenching, Organelles, Photoprotection, Lutein

WANG Yan-jie;XIA Xiao-jian;ZHOU Yan-hong;YU Jing-quan;. Relationship Between Lutein Deficit and Light Allocation as well as Antioxidants in Tomato[J]. ACTA HORTICULTURAE SINICA, 2007, 34(5): 1301-1304.

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Relationship Between Lutein Deficit and Light Allocation as well as Antioxidants in Tomato

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