Two imbibition properties independently influence the cultivar-specific flooding tolerance of dried soybean seeds.
Two imbibition properties independently influence the cultivar-specific flooding tolerance of dried soybean seeds.
复制标题
两种吸胀特性独立地影响干燥大豆种子的品种特定的淹水耐受性。
DOI：
10.1017/s0960258513000378
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发表时间：
2014
影响因子：
2.1
通讯作者：
Y.,Y. Konno and Y. Hagihara
中科院分区：
文献类型：
--
作者：
Jitsuyama;Y.,Y. Konno and Y. Hagihara
大豆种子在播种后如果暴露在过量的水分中，容易发生水淹伤害。本研究通过对大豆种子耐水淹性的研究，旨在阐明水淹伤害与吸胀的关系，为大豆耐水淹品种的选育提供基础信息。七个品种用于这项研究。种子在浸水处理后在纸巾中发芽，然后评估存活率。淹水种子的吸胀（被动吸胀）以种子鲜重在淹水过程中的变化来评价。用底部供水法测定了具有毛细效应的种子的吸胀量（毛细吸胀）。此外，测定了种皮的电导率和种子渗透压。淹水3 h后，品种间存活率差异显著。另外，淹水10-30 min的被动吸胀和淹水0-10 min的毛管吸胀是由于品种间吸胀速率差异显著所致。虽然没有吸胀表现出显着的相关性与生存直接，被动和毛细血管吸胀率之间的比率与生存显着相关。影响吸胀的因素包括种皮的导水率和渗透压，这是显着相关的被动和毛细管吸胀速率，分别。因此，种子的毛细和被动吸胀行为之间的平衡，影响种皮的导水率和种子渗透压，是密切相关的发生水浸伤害大豆种子。
Soybean seeds are prone to flooding injury just after planting if they are exposed to excess moisture. We investigated the flooding tolerance of soybean seeds to clarify the relationship between flooding injury and imbibition, to identify factors that could provide fundamental information for the breeding of flooding-tolerant cultivars. Seven cultivars were used for this study. The seeds were geminated in a paper towel after a flooding treatment and then evaluated for survival. The imbibition of submerged seeds (passive imbibition) was evaluated as the seed fresh weight change during the flooding process. The imbibition of seeds with capillary effect (capillary imbibition) was measured by the bottom water supply method. Furthermore, the conductivity of the seed coat and seed osmolarity were measured. After 3 h of flooding, significant differences in survival were detected among cultivars. In addition, the passive imbibition during 10–30 min of flooding, and the capillary imbibition during 0–10 min of flooding were caused by significant differences in the imbibition rate among cultivars. Although neither imbibition showed a significant correlation with the survival directly, the ratio between the passive and the capillary imbibition rate was significantly correlated with survival. Factors affecting imbibition included the hydraulic conductivity of the seed coat and seed osmolarity, which were significantly correlated with the passive and the capillary imbibition rate, respectively. Thus, the balance between the capillary and passive imbibition behaviour of seeds, affected by the hydraulic conductivity of the seed coat and seed osmolarity, was closely correlated with the occurrence of flooding injury in soybean seeds.