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Applications of xerophytophysiology in plant production-LED blue light as a stimulus improved the tomato crop

文献类型： 外文期刊

作者： Xu, Hui-lian 1 ; Xu, Qicong 1 ; Li, Fenglan 2 ; Feng, Yanzhong 3 ; Qin, Feifei 1 ; Fang, Wei 5 ;

作者机构： 1.Int Nat Farming Res Ctr, Matsumoto, Nagano 3901401, Japan

2.Heilongjiang Acad Agr Sci, Coll Life Sci, Harbin 150086, Peoples R China

3.Heilongjiang Acad Agr Sci, Harbin 150086, Peoples R China

4.Shandong Acad Agr Sci, Shandong Peanut Res Inst, Qingdao 266100, Peoples R China

5.Natl Taiwan Univ, Taipei 10764, Taiwan

关键词： Blue light;LED (light-emitting diodes);Osmotic adjustment;P-V (pressure-volume) curve;Tomato;Plant water relations;Xerophytophysiology

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

ISSN： 0304-4238

年卷期： 2012 年 148 卷

页码：

收录情况： SCI

摘要： Recent research using Arabidopsis has shown that blue light stimulates the plant through the receptor protein and induces regulations physiologically and morphologically. It is important to know whether the theory can be used in food crop production. In the present study blue light emitted from light-emitting diodes (LED) was used as a stimulus to tomato crop canopy after sunset for 2 h to induce xerophytophysiological regulations. Blue (450 nm), white and red (660 nm) LED lamps, all with a properties of 0.48 W, 24V. and 45 mu mol m(2) s(-1) at 10 cm over the lamp, were compared with non-illumination control. A 2 x 4 two factor experiment was conducted in a randomized split block design with the two cultivars as the main block. Results showed that the osmotic potential in the symplasm at full turgor was lower and the leaf turgor potential at full turgor was higher in tomato leaves in blue light treatment. The water fraction in the symplasm in the leaf was larger or the apoplastic water fraction was smaller in leaf of blue light irradiated plants. Both osmotic potential and relative water content at the point of incipient plasmolysis were lower in tomato leaves in blue light treatment. More leaf water was lost by stomatal transpiration and less leaf water was lost by cuticular transpiration in leaves of blue light treated tomato plants. Fruit color was improved and redder in blue light treatment. Fruit yield was increased by all light illumination treatments. The damage of fruit caused by Helicoverpa armigera worms was more severely in red light treatment and less severely in blue and white light treatments compared with the control. The leaf blight index was lower in blue and white light illumination treatments than the red light treatment and the control. Both cultivars showed LED illumination responses similar to each other although fruit yield was lower and leaf blight was severer in 'Baiju' than in 'Myoko'. In conclusion, illumination treatment with blue light from LED as a stimulus was effective in fruit yield increase and quality improvement as well as improvement in disease resistance of the tomato crop. (c) 2012 Elsevier B.V. All rights reserved.

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