Awns play a dominant role in carbohydrate production during the grain-filling stages in wheat (triticum aestivum)
文献类型：期刊论文
| 作者 | Li, Xiaojuan; Wang, Honggang; Li, Hanbing; Zhang, Lingyun; Teng, Nianjun; Lin, Qingqing; Wang, Jian; Kuang, Tingyun; Li, Zhensheng; Li, Bin |
| 刊名 | Physiologia plantarum
 |
| 出版日期 | 2006-08-01 |
| 卷号 | 127期号:4页码:701-709 |
| ISSN号 | 0031-9317 |
| DOI | 10.1111/j.1399-3054.2006.00679.x |
| 通讯作者 | Lin, jinxing(linjx@ibcas.ac.cn) |
| 英文摘要 | In wheat (triticum aestivurn l), the leaves particularly flag leaves have been considered to be the key organs contributing to higher yields, whereas awns have been considered subsidiary organs. compared with extensive investigations on the assimilation contribution of leaves, the photosynthetic characteristics of awns have not been well studied. in this study, we investigated the ultrastructure of chloroplasts, oxygen evolution, and phosphoenolpyruvate carboxylase [phosphoenolpyruvate carboxylase (pepcase) ec 4.1.1.31)] activity in both flag leaves and awns during the ontogenesis of wheat. transmission electron microscope observations showed initial increases in the sizes of grana and the degree of granum stacks from the florescenceemergence stage both in flag leaves and in awns, followed by the breakdown of membrane systems after the milk-development stage. the results of oxygen evolution assays revealed that in both organs, the rate of photosynthesis increased in the first few stages and then decreased, but the decrease occurred much earlier in flag leaves than in awns. a pepcase activity assay demonstrated that the activity of pepcase was much higher in awns than in flag leaves throughout ontogeny; the value was particularly high at the late stages of grain filling. our results suggest that awns play a dominant role in contributing to large grains and a high grain yield in awned wheat cultivars, particularly during the grain-filling stages. |
| WOS关键词 | PHOTOSYSTEM-II ; DURUM-WHEAT ; CHLOROPLAST ULTRASTRUCTURE ; ENZYME-ACTIVITIES ; OXYGEN EVOLUTION ; FLAG LEAF ; PHOTOSYNTHESIS ; EAR ; LEAVES ; BARLEY |
| WOS研究方向 | Plant Sciences |
| WOS类目 | Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000239561900017 |
| 出版者 | BLACKWELL PUBLISHING |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2379055 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Lin, Jinxing |
| 作者单位 | 1.Chinese Acad Sci, Inst Bot, Key Lab Photosynth & Mol Environm Physiol, Beijing 100093, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 3.Shandong Agr Univ, Coll Agron, Shandong 271018, Peoples R China 4.Fujian Normal Univ, Coll Bioengn, Fujian 350007, Peoples R China 5.Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Plant Cell & Chromosome Engn, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Xiaojuan,Wang, Honggang,Li, Hanbing,et al. Awns play a dominant role in carbohydrate production during the grain-filling stages in wheat (triticum aestivum)[J]. Physiologia plantarum,2006,127(4):701-709. |
| APA | Li, Xiaojuan.,Wang, Honggang.,Li, Hanbing.,Zhang, Lingyun.,Teng, Nianjun.,...&Lin, Jinxing.(2006).Awns play a dominant role in carbohydrate production during the grain-filling stages in wheat (triticum aestivum).Physiologia plantarum,127(4),701-709. |
| MLA | Li, Xiaojuan,et al."Awns play a dominant role in carbohydrate production during the grain-filling stages in wheat (triticum aestivum)".Physiologia plantarum 127.4(2006):701-709. |
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来源：中国科学院大学
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