Photosynthetic Pigments Affected by Fertilizer Source in Four Brassica Vegetables  

作　　者：Fadhil Hussein A1-Sahaf 

机构地区：[1]Horticulture and Landscape Gardening Department, College of Agriculture, Baghdad University, Abu-Ghuraib, Baghdad, Iraq

出　　处：《Journal of Agricultural Science and Technology(B)》2013年第4期246-253,共8页农业科学与技术（B）

摘　　要：Effect of fertilizer source （mineral fertilizer or organic manure） on photosynthetic pigments leaves content of four brassica vegetables （Pak choi, Kohlrabi, Cauliflower and Cabbage） was tested. Among treatments, cauliflower fertilized with chicken manure had the highest content of chlorophyll a and b （10.08 and 9.37 μm·g^-1）, while, pak choi had the lowest values （2.00 and 2.44 μm·g^-1） in non-fertilized plants. These differences in chlorophyll a and b content may have a great impact on photosynthetic rate and activity. Total carotenoids and total xanthophylls （lutein, zeaxanthin, antheraxanthin and violaxanthin） were the highest in cauliflower while the lowest was in pakchoi, β-carotene, on the other hand, was the highest percentage of total carotenoids （65.7%） in pak choi while Kohlrabi had the lowest percent （57.4%）. This high percentage offl-carotene of total carotenoids may compensate for lower content of chlorophylls and assist for efficient light harvesting process. Lutein showed to be the major components of xanthophyll pigments brassica vegetables and ranged from 0.462μm·g^-1 in cabbage to 0.626μm·g^-1 in kohlrabi but not differed significantly which may refer to genetically controlled. However, lutein, antheraxanthin and zeaxanthin content were increased significantly by the application of chicken manure regardless ofbrassica vegetable type. Violaxanthin was only detected in pak choi and not affected by fertilizer source. It can be concluding from the increasing contents of total xanthophylls pigments that may increase photosynthetic efficiency through non-photochemical quenching process.

关 键 词：Photosynthetic pigments chlorophylls accessory pigments carotenoids XANTHOPHYLLS mineral fertilizer chicken andcattle manure brassica vegetables. 

分 类 号：S634.036[农业科学—蔬菜学] Q945.11[农业科学—园艺学]