Responses of Japanese soybeans to hypoxic condition at rhizosphere were different depending upon cultivars and ambient temperatures.
Responses of Japanese soybeans to hypoxic condition at rhizosphere were different depending upon cultivars and ambient temperatures.
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DOI：
10.4236/ajps.2013.46161
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发表时间：
2013-01-01
期刊：
影响因子：
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通讯作者：
Jitsuyama, Y.
中科院分区：
文献类型：
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作者：
Jitsuyama, Y.
对大豆（Glycine max Merr.）以耐湿性不同的8个日本大豆品种的R1 ~ R2代植株为材料，在低氧-水培条件下培养1个月，研究了不同生育期植株的耐湿性，以及成熟度和环境温度对耐湿性的影响。不同时期的两个试验在空气温度和溶液温度上差异显著，但供氧条件基本相同。另外，对照组和低氧组的溶解氧浓度在各试验中均存在显著差异。高温低氧条件导致试管苗存活率降低70%以上。在较高的温度下，晚熟类型的“Yuzuru”和“Shirotsurunoko”在低氧条件下的存活率比对照显着下降。高温低氧条件下，它们的地上部干物质含量也显著降低。荚果干物质的缺氧下降趋势明显，在低温下也表现出缺氧症状。由此可见，大豆的耐缺氧性可以通过耐湿性来反映，缺氧损伤过程可以分为猝死症状和生物量下降两个阶段，耐缺氧机制受环境温度的强烈影响，受遗传背景的绝对控制。
To investigate the soybean (Glycine max Merr.) wet endurance, and the affect of the maturity and the ambient temperature to the response, the plantlet in growth stage ranged from R1 to R2 of 8 Japanese soybean cultivars which characterized as various wet endurance in a past report were cultured under hypoxic-hydroponic condition for a month. Two experiments at different periods differed significantly in temperature of air and hydroponic solution, but the oxygenic condition were similar each experiments, as aimed for. And also, control and hypoxia treatments significantly differed in dissolved oxygenic concentration in each experiments. The hypoxic condition at higher temperature induced the reduction of survival of plantlet up to 70%. At higher temperature, the survival rate of late maturity types "Yuzuru" and "Shirotsurunoko" were decreased significantly in hypoxic condition than in control. Similarly, the shoot dry matters of them were also decreased significantly in hypoxia at higher temperature. The tendency of the decreasing in hypoxia was remarkable in the pod dry matter, and the symptoms were shown also at the lower temperature. From these results, soybean's hypoxic tolerant may be reflected with the wet endurance, the process of hypoxic damages can be divided to sudden death symptom and biomass decreasing, and the mechanisms of hypoxic tolerance might be affected strongly by ambient temperature, and absolutely controlled with the genetic background.