《植物生理学报》 2017, 53(11): 1947-1954

作物籽粒中水分运输路径及其可视化研究进展

刘大同^1,2,*, 王忠², 闫大伟³, 熊飞²

¹江苏里下河地区农业科学研究所/农业部长江中下游小麦生物学与遗传育种重点实验室, 江苏扬州225007; ²扬州大学江苏省作物遗传生理重点实验室/粮食作物现代产业技术协同创新中心, 江苏扬州225009; ³剑桥大学塞恩斯伯里实验室, 英国剑桥CB2 1LR

通信作者：刘大同；E-mail: 15062799250@163.com

摘　要：

植物体内水分运输是各器官密切联系和各种生理代谢有序进行的根本保障。对水分含量高低和运输路径进行可视化, 在无损条件下对植物体内水分运输结构进行成像分析, 是多学科多技术交叉研究的热点。目前对谷物籽粒中水分排出的机制和路径研究非常欠缺, 有关小麦(Triticum aestivum)穗部各组织的维管束结构和走向, 尤其是颖果和穗部维管束的联络关系等尚存疑问。本文综述了植物体内水分运输路径可视化研究策略和技术的进展, 并结合多年研究基础预测了小麦颖果中水分排出的方式, 对研究中存在的问题进行了展望。

关键词：水分运输路径; 小麦; 可视化; 维管束系统; micro-CT

收稿：2017-09-18   修定：2017-10-30

资助：国家自然科学基金(31700163、30600383和39270443)。

Advances in the pathway and visualization study of water transport in grain

LIU Da-Tong^1,2,*, WANG Zhong², YAN Da-Wei³, XIONG Fei²

¹Lixiahe Regional Institute of Agricultural Sciences of Jiangsu / Key Laboratory of Wheat Biology and Genetic Breeding in the Middle and Lower Yangtze River, Ministry of Agriculture, Yangzhou, Jiangsu 225007, China; ²Jiangsu Key Laboratory of Crop Genetics and Physiology / Co-innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu 225009, China; ³Sainsbury Laboratory, University of Cambridge, Cambridge CB2 1LR, United Kingdom

Corresponding author: LIU Da-Tong; E-mail: 15062799250@163.com

Abstract:

Water transport through the whole plant connects various organs and is critical for metabolism. It has been a hot point of multi-disciplinary and multi-technical studies on visualizing the water transport in the vascular tissues under non-destructive conditions. However, it remains unclear of the development of vascular tissues in the rachilla and spikelet, the mechanism and path of water discharge in the grain, and especially the role of vascular tissue in this process. In this review, we summarized the progress of the strategies and techniques applied for the visualization of water transport pathway. We also discussed the potential mode of water expelled from wheat (Triticum aestivum) caryopsis based on our preliminary study and the unresolved questions.

Key words: water transport paths; wheat; visualization; vascular bundle system; micro-CT