Morphological root responses of soybean to rhizosphere hypoxia reflect waterlogging tolerance
Morphological root responses of soybean to rhizosphere hypoxia reflect waterlogging tolerance
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DOI：
10.4141/cjps-2014-370
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发表时间：
2015-09-01
影响因子：
1.2
通讯作者：
Jitsuyama, Yutaka
中科院分区：
文献类型：
--
作者：
Jitsuyama, Yutaka
土壤水分过剩引起缺氧，造成大豆涝渍伤害[j]。稳定)。选用耐缺氧性不同的12个日本大豆品种。其中11个（除Hayahikari外）使用先前研究数据的缩放指数对其耐涝性进行了评估。为了研究对缺氧的反应，在水培条件下，每年2周，持续2年，在根际人工维持好氧或缺氧浓度。在营养早期评估了缺氧反应（以植物干重和根系形态来衡量）。低氧处理对大豆根系干重的影响显著，而年份对大豆干重的影响不显著。根干重的变化，特别是粗根长与耐涝指数呈显著相关，概率水平为0.001。本研究表明，大豆根系对根际缺氧的响应可能反映了其耐涝性。
Excess soil moisture induces hypoxia, causing waterlogging injury in soybeans [Glycine max (L.) Merr.]. Twelve Japanese soybean cultivars with varying hypoxia tolerance were used. Of these, 11 (all but Hayahikari) were evaluated for waterlogging tolerance using a scaled index with data from previous studies. To investigate hypoxic responses, cultivars were grown under hydroponic conditions for 2 wk a year for 2 yr, with aerobic or hypoxic oxygen concentrations artificially maintained in the rhizosphere. Hypoxic responses (measured as plant dry weight and root morphology) were assessed at the early vegetative stage. The effects of hypoxic treatment on root dry weight were significant, and the effect of year on soybean dry weight was not significant. The change in root dry weight, and particularly, in coarse root length, was significantly correlated with waterlogging tolerance index at the 0.001 probability level. This study showed that root responses to rhizosphere hypoxia might reflect waterlogging tolerance in soybeans.