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首页> 外文会议>General Meeting of the European Grassland Federation >Impact of waterlogging under different temperatures on hardening and freezing tolerance of timothy {Phleum pratense)
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Impact of waterlogging under different temperatures on hardening and freezing tolerance of timothy {Phleum pratense)

机译：不同温度下涝渍的影响对蒂莫西{贫世症的硬化和冷冻耐受性

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Precipitation has genetally increased in Norway during the last decades, and climate projection indicate a further increase in the future. The growing season has also become longer with higher temperatures, particularly in autumn. Previous studies have shown negative effects of higher temperatures and a rcmpcrarurc-dcpcndent effect of waterlogging on hardening capacity of timothy. We studied effects of waterlogging on seedlings of timothy [Phleum pratense, cv. Noreng) under three temperatures: 3 "C,7 "C, 12 °C, and natural light in autumn in aphytotron at Holt, Tromso (69°N). After temperature trcarmcnts, all plants were further acclimated at 2 "C for three weeks. Freezing tolerance was determined as LT-0 and rcgrowth after seedlings were frozenat several predefined freezing tempcrarurcs in a programmable freezer. After freezing, survival and regrowth of new leaves was measured after three weeks ar 18 °C, 24 h light in a greenhouse. Rising temperatures had a clear negative effect on freezing rolerance. Waterlogging had no effect on frost tolerance of plants grown under consrant 3 "C, but had clear negative effects under 7 °C, and even clearer effects under 12 °C compared to plants not waterlogged. The results indicate that waterlogging under higher aurumn temperatures may have negative implications for hardening of rim o thy.
机译：在过去的几十年中，挪威的降水量在挪威累计增加，气候投影在未来进一步增加。越来越多的季节也变得越来越长，温度较高，特别是在秋季。以前的研究表明了较高温度的负面影响和耐涝性对摩托车硬化容量的抗rcmpcrarurc-dcpcndndent效应。我们研究了Waterlogging对蒂莫西幼苗的影响[贫民窟，CV。 Noreng）在三个温度下：3“C，7”C，12°C，12°C，在HOLT，TromSO（69°N）的高效液中的秋季自然光。在温度trocarmcnts之后，所有植物在2“c中进一步适应三周。将耐热性被确定为LT-0，幼苗后rcrowth在可编程冰箱中冻结几种预定义的冻结纹理。冻结后，新叶子的冻结，存活和再生后三个星期后测量的18°C，温室24小时光。上升的温度对冷冻朗格的效果明显消极作用。涝渍对植物在总结3“C下植物的污水耐受性没有影响，但在7以下的植物含量明显消极效应与不涝的植物相比，12℃下甚至更清晰。结果表明，在较高的Aurumn温度下的涝渍可能对RIM O Thy的硬化产生负面影响。

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