Zhejiang Agriculture Academy of science

Hangzhou, China

Zhejiang Agriculture Academy of science

Hangzhou, China
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Liu H.-P.,Zhejiang University | Hong C.-L.,Zhejiang Agriculture Academy of science | Li R.,Zhejiang University | Dai Z.-X.,Zhejiang University | And 3 more authors.
Zhiwu Shengli Xuebao/Plant Physiology Journal | Year: 2016

It is an effective approach to supply iodine for human body naturally and eliminate the iodine deficiency disorders (IDD) by using exogenous iodine to improve the iodine deficiency environment and enhance the iodine content of crops. In this paper, iodide (I-) was used as the exogenous iodine, then, the contents of vitamin C, soluble sugar and total acidity of Capsicum annuum and tomato (Lycopersicon esculentum) fruits before and after absorbing the exogenous I- were compared. The changes in the values of various biochemical parameters under various iodide concentrations in different growth stages of the C. annuum were systematically surveyed. It was analyzed that how the I- affected the fruit quality through biogeochemical factors. The results show that at the treatment of 0.5 mg·L-1 I-, the tomato fruit quality achieved the best, amounting to 218.63 mg·kg-1 vitamin C, 7.04 mg·kg-1 soluble sugar, and 5.4% total acidity only. While, as treated by 0.5-5.0 mg·L-1 I-, C. annuum fruits with high vitamin C and soluble sugar contents and low total acidity can be obtained. Furthermore, absorbing proper amount of I- (0.5-2.5 mg·L-1) could increase chlorophyll (Chl) content, and enhance catalase (CAT), peroxidase (POD) and superoxide (SOD) activities of C. annuum leaves, being 1.04-3.1, 1.47-3.92, 1.69-5.01 and 1.36-2.11 times of the untreated control respectively, while, decrease the malondialdehyde (MDA) content to be only 40.3%-95.8% of the untreated control. The improvement of fruit quality was associated with the optimization of biogeochemical factors. © 2016, Science Press. All right reserved.


Liu H.,Zhejiang University | Hong C.,Zhejiang University | Hong C.,Zhejiang Agriculture Academy of science | Weng H.,Zhejiang University | And 4 more authors.
Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae | Year: 2012

Using liquid or solid iodized fertilizer derived from seaweed, we cultivated a number of leafy vegetables in field trial, including spinach, Chinese cabbage, lettuce, cilantro, mustard, and snow cabbage to study the characteristics of iodine uptake and accumulation by these plants. Our results indicate that the iodine content in the edible parts of leafy vegetable increases with increasing level of exogenous iodine, and decreases after the initial application of the iodized fertilizer. Surface application of liquid iodized fertilizer is more favorable for iodine accumulation in vegetable leaves, whereas root application of solid iodized fertilizer leads to more accumulation of iodine in roots.

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