Institute of Crop Germplasm Resources, The Chinese Academy of Agricultural Sciences, Peking, China.
Plant Physiol. 1983 Jun;72(2):303-7. doi: 10.1104/pp.72.2.303.
Exposure of winter wheat (Triticum aestivum L.) to various combinations of flooding and freezing stresses induces much greater damage than the individual stresses. Cold-hardened plants flooded for 1 week or exposed to -6 degrees C for 1 week show 100% survival, while survival of plants exposed to both stresses simultaneously is reduced by 20 to 30%, and cold hardiness decreases by several degrees. The level of nonstructural carbohydrates increases in crown tissue during cold acclimation, but decreases when the plants are exposed to flooding or to -6 degrees C for 1 week. The respiratory capacity of crown tissue segments declines when the plants are stressed. Uptake of (86)Rb by the roots of intact seedlings declines after exposure to either freezing or flooding, whereas passive efflux of amino acids is observed after freezing but not following flooding. This study has shown that detectable stress-induced metabolic changes occur in winter wheat before the applied stress is severe enough to reduce survival.
冬小麦（Triticum aestivum L.）暴露于各种组合的淹水和冰冻胁迫下所造成的损害比单一胁迫要大得多。经过 1 周的冷水处理或 1 周的-6°C 处理的耐寒植物的存活率达到 100%，而同时暴露于两种胁迫下的植物的存活率降低了 20%至 30%，耐寒性降低了几度。在低温驯化过程中，冠组织中的非结构性碳水化合物水平增加，但当植物受到淹水或 1 周的-6°C 处理时，其水平下降。冠组织片段的呼吸能力在植物受到胁迫时下降。完整幼苗的根对（86）Rb 的吸收在暴露于冰冻或淹水后下降，而在冰冻后观察到氨基酸的被动流出，但在淹水后没有观察到。这项研究表明，在施加的胁迫严重到足以降低存活率之前，冬小麦就已经发生了可检测到的胁迫诱导的代谢变化。
