作物学报Issue(10)：1846-1856,11.DOI:10.3724/SP.J.1006.2014.01846
荞麦茎秆解剖结构和木质素代谢及其与抗倒性的关系
Relationship of Anatomical Structure and Lignin Metabolism with Lodging Resistance of Culm in Buckwheat
摘要
Abstract
Lodging is a major problem in buckwheat (Fagopyrum esculentum Moench) production. In this study, we investigated the relationship between anatomical structure together with lignin metabolism and lodging resistance. The results indicated that the lodging resistance of culm in buckwheat was closely related to the anatomical structure and lignin metabolism of culm. The lodging percentage was negatively correlated with snapping resistance parameter of culm (r=-0.907, P<0.01), lignin content (r=-0.844, P<0.01), mechanical tissue thickness (r=-0.881, P<0.01), culm wall thickness (r=-0.947, P<0.01), vascular bun-dle area (r=-0.846, P<0.01), mechanical tissue layer number (r=-0.806, P<0.05), and large vascular bundle number (r=-0.709, P<0.05), but positively correlated with lodging index (r=0.842, P<0.01). The lignin content was positively correlated with activities of phenylalanine ammonialyase (r=0.984, P<0.01), 4-coumarate:CoA ligase (r=0.927, P<0.01), and cinnamyl alcohol dehydrogenase (r=0.862, P<0.01). Therefore, lignin content in culm, mechanical tissue layer number, mechanical tissue thickness, culm wall thickness, large vascular bundle number, and vascular bundle area can be used as main indicators to evaluate lodging resistance in buckwheat. Buckwheat cultivars with high resistance to culm snapping and lodging usually have high lignin content, large number of mechanical tissue layer, and large number of vascular bundle, and thick mechanical tissue and culm wall, and large vascular bundle area.关键词
荞麦/解剖结构/木质素代谢/抗倒伏能力Key words
Buckwheat/Anatomical structure/Lignin metabolism/Lodging resistance引用本文复制引用
汪灿,阮仁武,袁晓辉,胡丹,杨浩,林婷婷,何沛龙,李燕,易泽林..荞麦茎秆解剖结构和木质素代谢及其与抗倒性的关系[J].作物学报,2014,(10):1846-1856,11.基金项目
本研究由中央高校基本科研业务费专项资金(XDJK2014D012),中央高校基本科研业务费专项资金(2362014xk09),重庆市荞麦产业体系创新团队建设项目(CQCYT2011001)和重庆市科技计划应用开发重点项目(cstc2013yykfb0118)资助。 （XDJK2014D012）
