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Temperature stress during flowering time affects yield and quality parameters of waxy barley

机译：开花期的温度胁迫影响蜡质大麦的产量和品质参数

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摘要

Temperature affects growth and quality parameters of crops. This study investigates the effects of low and high temperatures during flowering time on yield and quality of waxy barley. Three waxy genotypes and the cultivar Lomerit with a non-waxy starch composition were exposed to three different temperature variants (10, 20 [control] and 30 °C) in growth chambers. Stress was applied at the beginning of heading and was stopped at the beginning of watery ripe. Different temperatures during flowering resulted in different yields, whereas these effects were also genotype specific. High temperatures (30 °C) at flowering resulted in a significantly reduced number of kernels and kernel yield per plant. Low temperatures at flowering (10 °C) mainly resulted in higher yields. In addition, a significant influence of the temperature at flowering and the genotype on protein content, starch content and starch composition was detected. High temperature at flowering resulted in a decreased starch and increasedprotein content for all genotypes. Low temperatures at flowering time were mainly associated with increased starch and decreased protein contents. Protein content was negatively correlated with starch content and positively correlated with the ss-amylase-activity. The waxy genotypes showed a higher temperature sensitivity regarding the investigated yield parameters than the non-waxy cv. Lomerit.
机译：温度影响农作物的生长和品质参数。这项研究调查了开花期间低温和高温对蜡质大麦产量和品质的影响。三种蜡质基因型和具有非蜡质淀粉成分的Lomerit品种在生长室中暴露于三种不同的温度变量（10、20 [对照]和30°C）。在抽穗期开始时施加压力，在含水成熟期开始时停止施加压力。开花期间不同的温度导致不同的产量，而这些效应也是基因型特异性的。开花时的高温（30°C）导致每粒植物的籽粒数量和籽粒产量显着降低。开花时的低温（10°C）主要导致更高的产量。另外，检测到开花温度和基因型对蛋白质含量，淀粉含量和淀粉组成的显着影响。开花期的高温导致所有基因型的淀粉减少和蛋白质含量增加。开花期的低温主要与淀粉增加和蛋白质含量降低有关。蛋白质含量与淀粉含量呈负相关，与β-淀粉酶活性呈正相关。与非蜡质cv相比，蜡质基因型显示出更高的温度敏感性。洛默里特。

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