采用SDS-PAGE电泳和切胶比色进行亚基定量的方法,研究施氮量对2个小麦品种籽粒HMW-GS和GMP积累的影响。结果表明,高蛋白小麦品种徐州26在花后14 d HMW-GS就开始形成,低蛋白品种宁麦9号在花后21 d才开始形成。增施氮肥对小麦灌浆前期HMW...采用SDS-PAGE电泳和切胶比色进行亚基定量的方法,研究施氮量对2个小麦品种籽粒HMW-GS和GMP积累的影响。结果表明,高蛋白小麦品种徐州26在花后14 d HMW-GS就开始形成,低蛋白品种宁麦9号在花后21 d才开始形成。增施氮肥对小麦灌浆前期HMW-GS的形成作用不明显,而有利于徐州26 HMW-GS积累速度的提高和HMW-GS快速积累期的延长,及宁麦9号灌浆后期HMW-GS的积累,导致成熟期徐州26 HMW-GS和GMP含量随施氮量增加而提高;但施氮过多则降低宁麦9号籽粒HMW-GS和GMP含量。相同氮素水平下,籽粒HMW-GS各亚基含量徐州26均高于宁麦9号,表明籽粒HMW-GS亚基含量与小麦品质性状密切相关。展开更多
小麦贮藏蛋白是面粉品质的主要评价指标。本研究以不同高分子量麦谷蛋白亚基组合的强筋小麦(济麦44和济麦229)和中筋小麦(济麦22)为试材,分析强筋小麦和中筋小麦及4+12和5+10高分子量麦谷蛋白亚基组合的籽粒醇溶蛋白、麦谷蛋白及谷蛋白...小麦贮藏蛋白是面粉品质的主要评价指标。本研究以不同高分子量麦谷蛋白亚基组合的强筋小麦(济麦44和济麦229)和中筋小麦(济麦22)为试材,分析强筋小麦和中筋小麦及4+12和5+10高分子量麦谷蛋白亚基组合的籽粒醇溶蛋白、麦谷蛋白及谷蛋白大聚合体(GMP)在小麦灌浆期的积累动态和成熟籽粒中的贮藏蛋白种类、相对含量。结果表明,强筋小麦和中筋小麦的麦谷蛋白和醇溶蛋白在整个小麦灌浆期的积累趋势相同,均持续上升,但GMP积累却存在较大差异,强筋小麦的GMP含量持续增加而中筋小麦呈“下降-上升-下降-上升”的趋势。从高分子量麦谷蛋白亚基组成类型上看,5+10亚基组合的醇溶蛋白、麦谷蛋白及GMP在灌浆中后期的含量均高于4+12亚基组合类型。通过TMT(tandem mass tags)蛋白质组学分析发现,3个小麦品种的成熟籽粒共检测到53个贮藏蛋白,共分为三类,包括27个醇溶蛋白、16个Avenin-like蛋白和10个麦谷蛋白。济麦44较济麦22相对含量高的原因是大多数贮藏蛋白的表达量高,而济麦229相对含量高的原因是部分贮藏蛋白超高量表达。本研究结果可为我国小麦品质改良和优质小麦生产提供技术参考。展开更多
Size distribution of glutenin macropolymer （GMP） particles significantly affects the quality of final products in wheat. Six wheat varieties in eastern China were used for investigating the GMP content, particle siz...Size distribution of glutenin macropolymer （GMP） particles significantly affects the quality of final products in wheat. Six wheat varieties in eastern China were used for investigating the GMP content, particle size distribution and their relation. The results showed that the particle diameter of GMP changed from 0.38 μm to 269 μm. A typical bimodal curve of volume distribution of particles with peak values ranged from 4.44 μm to 5.36 μm and from 45.76 μm to 116.30 μm, respectively. Number distribution of particles showed the typical population with peak values in the range of 0.57-1.00 p.m. Proportions of granules 〈12μm, 12-80 μm and 〉80 μm were in the range of 17.1%-47.8%, 32.1%-50.3% and 10.2%-38.1% of total volume, respectively. The content of GMP was negatively correlated with the volume of GMP particles 〈12μm, but positively correlated with the volume of particles 〉80μm. The results suggested that the greater percentage of larger GMP particles is, the more GMP content there is in wheat grain.展开更多
文摘小麦贮藏蛋白是面粉品质的主要评价指标。本研究以不同高分子量麦谷蛋白亚基组合的强筋小麦(济麦44和济麦229)和中筋小麦(济麦22)为试材,分析强筋小麦和中筋小麦及4+12和5+10高分子量麦谷蛋白亚基组合的籽粒醇溶蛋白、麦谷蛋白及谷蛋白大聚合体(GMP)在小麦灌浆期的积累动态和成熟籽粒中的贮藏蛋白种类、相对含量。结果表明,强筋小麦和中筋小麦的麦谷蛋白和醇溶蛋白在整个小麦灌浆期的积累趋势相同,均持续上升,但GMP积累却存在较大差异,强筋小麦的GMP含量持续增加而中筋小麦呈“下降-上升-下降-上升”的趋势。从高分子量麦谷蛋白亚基组成类型上看,5+10亚基组合的醇溶蛋白、麦谷蛋白及GMP在灌浆中后期的含量均高于4+12亚基组合类型。通过TMT(tandem mass tags)蛋白质组学分析发现,3个小麦品种的成熟籽粒共检测到53个贮藏蛋白,共分为三类,包括27个醇溶蛋白、16个Avenin-like蛋白和10个麦谷蛋白。济麦44较济麦22相对含量高的原因是大多数贮藏蛋白的表达量高,而济麦229相对含量高的原因是部分贮藏蛋白超高量表达。本研究结果可为我国小麦品质改良和优质小麦生产提供技术参考。
基金Supported by the National Key Research and Development Program of China(2016YFD0300408)the Anhui Provincial Natural Science Foundation(1408085MC48)
文摘Size distribution of glutenin macropolymer （GMP） particles significantly affects the quality of final products in wheat. Six wheat varieties in eastern China were used for investigating the GMP content, particle size distribution and their relation. The results showed that the particle diameter of GMP changed from 0.38 μm to 269 μm. A typical bimodal curve of volume distribution of particles with peak values ranged from 4.44 μm to 5.36 μm and from 45.76 μm to 116.30 μm, respectively. Number distribution of particles showed the typical population with peak values in the range of 0.57-1.00 p.m. Proportions of granules 〈12μm, 12-80 μm and 〉80 μm were in the range of 17.1%-47.8%, 32.1%-50.3% and 10.2%-38.1% of total volume, respectively. The content of GMP was negatively correlated with the volume of GMP particles 〈12μm, but positively correlated with the volume of particles 〉80μm. The results suggested that the greater percentage of larger GMP particles is, the more GMP content there is in wheat grain.
