随着全球气候变暖，高温热害特别是短期极端高温频发，给全球小麦的生产带来了极大风险。为研究高温热害特别是短期极端高温对小麦同化物分配与转运的影响，本文通过人工气候室进行符合温度日变化规律的控温试验，采用2个抗性不同的小麦品种，设置了4个不同的温度水平和2个高温持续时间，系统的研究开花灌浆期高温互作对小麦同化物分配与转运的影响。研究表明，开花灌浆期高温互作胁迫下，小麦穗分配指数及籽粒淀粉含量随高温水平和持续时间的增加总体呈现下降的趋势；茎鞘的分配指数则随高温水平和持续时间的增加总体呈现上升的趋势。
目录
摘要........................................................................ 1
关键词
Abstract ................................................................... 1
引言
引言 ......................... ..............................................2
1. 材料与方法 ......... .................................................3
1.1 试验设计 ................. ............................................. 3
1.2 测试指标与方法 .......... . .............................................4
1.3 数据分析方法 ............... ........................................... 4
2. 结果与分析 .............................................................. 4
2.1 开花灌浆期高温互作对小麦地上部各器官干物质积累与分配的影响............. .4
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2.2 开花灌浆期高温互作对小麦植株叶片氮含量与氮积累量的影响 ................ .7
2.3 开花灌浆期高温互作对小麦籽粒淀粉和可溶性糖含量的影响 ................... 7
3. 讨论与小结 ................................ .............................9
3.1 高温对植株干物质积累与分配的影响....... ...............................9
3.2 高温对植株叶片氮含量的影响........................................ ....9
3.3 高温对植株淀粉含量的影响.......................................... ....9
4.致谢 ....................................................................11
参考文献................................................................... 12
开花灌浆期高温互作对小麦同化物分配与转运的影响
Effects of Heat Stress during Anthesis and Grianing Filling on the Partitioning and Translocation of Assimilation in Wheat
Student :Omarali
Tutor :Liu Leilei
Abstract: The global climate has been changing in the last decades. Extreme climate events have become more and more common as a result of climate change. With the intensification of climate change, heat stress during reproductive stages has posed great risks to the wheat yield, which would be a threat to food security in China. To estimate the effect of heat stress on the carbon and nitrogen metabolism of wheat, the pot experiments were carried out in controlledenvironment cambers with different temperature levels and durations and wheat varieties. Results showed that the partitioning index of spike decreased with the increasing temperature levels and durations, while the partitioning index of steam showed an increasing trend. Because heat stress is a major cause of yield loss and the number of heat events is projected to increase in the future, quantifying the future impact of heat stress on wheat production and developing appropriate adaptation and mitigation strategies are critical for developing food security policies in China and elsewhere.

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