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以抗旱性有显著差异的两个冬小麦品种为材料,在干旱胁迫(DS)和正常灌溉(WW)条件下,研究了源库调节对小麦营养器官中可溶性碳水化合物(WSC)和籽粒千粒重(TGM)的影响.结果表明:缩库处理显著增加了小麦各营养器官WSC含量,且正向促进WSC的相对转运;减源处理反之.源库调节WSC含量及其相对转运量/率的效应为:干旱胁迫显著高于正常灌溉,抗旱品种(陇鉴19)显著高于水分敏感品种(Q9086),缩库处理对WSC含量的影响强度显著高于减源处理,穗下节和倒二节普遍高于倒三节、叶鞘和叶.减源处理下,陇鉴19的总WSC相对转运率的强势器官主要为叶鞘、穗下节和倒二节,而Q9086主要表现在倒二节和倒三节;两小麦品种果聚糖相对转运率的强势器官均为叶鞘、穗下节和倒二节.减源处理使陇鉴19和Q9086的TGM在干旱胁迫下分别下降27.3%和31.7%,在正常灌溉下分别下降25.3%和12.1%.缩库处理的WSC含量及其相对转运与TGM的相关系数显著大于减源处理;干旱胁迫处理显著高于正常灌溉处理,不同器官中WSC总含量和果聚糖含量与TGM普遍表现出较高的相关系数(r2>0.900);小麦WSC含量及其相对转运与TGM关联度较为密切的器官主要集中在叶鞘和穗下节.在干旱胁迫条件下,WSC总含量有关性状与TGM表现出较高关联度,而在正常灌溉条件下,蔗糖和葡聚糖有关性状与TGM普遍表现出较高关联度.源库关系对小麦不同营养器官WSC及籽粒千粒重的调节易受水分环境、基因型和营养器官位置的显著影响.
Two winter wheat cultivars with significant differences in drought resistance were used as materials to investigate the effects of source-sink regulation on soluble carbohydrate (WSC) and grain weight per 1000-grain weight (TGM) in wheat under drought stress (DS) and normal irrigation (WW) ) .The results showed that the reduction of WSC contents in vegetative organs of wheat significantly increased and the relative transport of WSC promoted positively, while the reduction of source treatment conversely the effect of source sink on WSC content and relative transport amount / Drought stress was significantly higher than that of normal irrigation. The drought resistant variety (Longjian 19) was significantly higher than that of the water sensitive variety (Q9086), and the effect of shrinking treatment on WSC content was significantly higher than that of reduced source treatment In the next three sections, the leaf sheaths and the leaves. Under the treatment of reduced source, the dominant organs of the total translocation rate of WSC in Longjian 19 were leaf sheath, panicle spike and tubercle, while Q9086 mainly manifested in two and three down; The dominant organs of the relative translocation rate of levan in wheat cultivars were leaf sheath, lower ear and lower tuber.Dry-source TGM of Longjian 19 and Q9086 decreased by 27.3% and 31.7% under drought stress, respectively. Under normal irrigation Down 25.3% and 12.1% respectively The correlation coefficient of content and relative translocation with TGM was significantly greater than that of reduced-source treatment. The treatment with drought stress was significantly higher than that with normal irrigation. The total content of WSC and fructan in different organs showed generally higher correlation coefficient with TGM (r2> 0.900) .Wheat WSC content and its relative translocation were closely related to TGM.The organs mainly concentrated in leaf sheaths and lower ears.In the condition of drought stress, the total content of WSC related traits showed a high correlation with TGM, while in normal Irrigation conditions, sucrose and dextran-related traits generally showed a high correlation with TGM.The regulation of source-sink relationship on WSC and grain-1000-grain weight of different vegetative organs of wheat was significantly affected by the water environment, genotype and vegetative organs.