| Effects of stem structure and cell wall components on bending strength in wheat |
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| 引用本文： | WANG Jian ZHU Jinmao LIN Qinqin LI Xiaojuan TENG Nianjun LI Zhensheng LI Bin ZHANG Aimin LIN Jinxing. Effects of stem structure and cell wall components on bending strength in wheat[J]. 科学通报(英文版), 2006, 51(7): 815-823. DOI: 10.1007/s11434-006-0815-z |
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| 作者姓名： | WANG Jian ZHU Jinmao LIN Qinqin LI Xiaojuan TENG Nianjun LI Zhensheng LI Bin ZHANG Aimin LIN Jinxing |
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| 作者单位： | [1]Key Laboratory of Photosynthesis and Molecular Environment Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China [2]College of Life Sciences, Fujian Normal University, Fuzhou 350007, China [3]The State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China |
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| 摘 要： | Stem is an important organ consisting of storage, transportation and mechanical tissues and is closely related to yield. There is an irregular cavity in the ce- real crop stems and the lower the location, the shorter and thicker the walls of the internode…
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| 关 键 词： | 弯曲应力 小麦 茎 维管束 纤维素 木质素 |
| 文章编号： | 10.1007/s11434-006-0815-z |
| 收稿时间： | 2005-10-28 |
| 修稿时间： | 2005-10-282006-01-23 |
Effects of stem structure and cell wall components on bending strength in wheat |
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| Jian Wang,Jinmao Zhu,Qinqin Lin,Xiaojuan Li,Nianjun Teng,Zhensheng Li,Bin Li,Aimin Zhang,Jinxing Lin. Effects of stem structure and cell wall components on bending strength in wheat[J]. Chinese science bulletin, 2006, 51(7): 815-823. DOI: 10.1007/s11434-006-0815-z |
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| Authors: | Jian Wang Jinmao Zhu Qinqin Lin Xiaojuan Li Nianjun Teng Zhensheng Li Bin Li Aimin Zhang Jinxing Lin |
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| Affiliation: | (1) Key Laboratory of Photosynthesis and Molecular Environment Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China;(2) College of Life Sciences, Fujian Normal University, Fuzhou, 350007, China;(3) The State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China |
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| Abstract: | Morphological traits, anatomical features, chemical components and bending stress in the stems of three genotypes of wheat (Triticum aestivum L.), namely Xiaoyan54, 8602 and Xiaoyan81, were ex- amined by means of light microscopy coupled with Fourier transform infrared spectroscopy (FTIR). No- ticeable changes in morphological and anatomical traits were observed, including outer radius of stem, the ratio of stem outer radius to stem wall thickness, various tissue proportions and variations among dif- ferent types of vascular bundles. The results of chemical analysis revealed that Xiaoyan81 had the highest cellulose content in comparison with Xiao- yan54 and 8602, whereas lignin level in Xiaoyan81 was lower than that in 8602 but higher that that in Xiaoyan54. Bending stress analysis demonstrated that Xiaoyan81 may be the main target for identifica- tion, for it had the highest bending stress among the stems of three genotypes. Associated with bending stress, all the results presented here suggested that the ratio of stem wall thickness to its outer radius, schlerenchyma tissue proportion, the average num- ber of big VB per unit and the cellulose content are four important factors affecting the mechanical strength of Xiaoyan81 wheat stems, which can be considered as the key parameters for selecting varie- ties with bending stress. Therefore, it was suggested that in the selection of lodging resistant cultivars one should consider those characterized with large ratio of outer radius of stem to stem wall thickness, great-erschlerenchyma tissue proportion, high average number of big VB per unit with high cellulose content in their stems. |
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| Keywords: | wheat stem vascular bundles cellulose lignin bending stress. |
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