Some Accessions of Amazonian Wild Rice (Oryza glumaepatula) Constitutively Form a Barrier to Radial Oxygen Loss along Adventitious Roots under Aerated Conditions
Some Accessions of Amazonian Wild Rice (Oryza glumaepatula) Constitutively Form a Barrier to Radial Oxygen Loss along Adventitious Roots under Aerated Conditions
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DOI：
10.3390/plants9070880
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发表时间：
2020-07-01
期刊：
影响因子：
4.5
通讯作者：
Shiono, Katsuhiro
中科院分区：
文献类型：
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作者：
Ejiri, Masato;Sawazaki, Yuto;Shiono, Katsuhiro
径向氧损失屏障（ROL）减少了通过通气组织向根尖运输的氧的损失，使湿地植物的根能够生长到缺氧/缺氧的淹水土壤中。然而，人们对其基因调控知之甚少。数量性状基因座（QTL）定位可以帮助了解障碍形成的调控因素。水稻（Oryza sativa）在静止条件下诱导形成ROL屏障，而少数湿地植物在通气条件下组成性形成ROL屏障。在这里，我们评估了一个组成型ROL障碍的形成，共四个加入两个野生稻品种。其中3份为O. glumaepatula，第4种为非湿地种O.普通猪毛菜这些物种具有AA型基因组，这允许它们与栽培稻杂交。三个人。glumaepatulaaccessions（W2165，W2149，和W1183）形成了一个ROL屏障通气条件下。西奥rufipogonaccession（W1962）不能形成组成型ROL屏障，但在停滞条件下形成诱导型ROL屏障。三个人。glumaepatulaaccessions应该是有用的QTL定位，以了解一个组成型ROL障碍的形式。W2165的组成性屏障与栓化和抵抗外皮层质外体示踪剂（高碘酸）的渗透密切相关，但不包括厚壁组织中的木质素。
A barrier to radial oxygen loss (ROL), which reduces the loss of oxygen transported via the aerenchyma to the root tips, enables the roots of wetland plants to grow into anoxic/hypoxic waterlogged soil. However, little is known about its genetic regulation. Quantitative trait loci (QTLs) mapping can help to understand the factors that regulate barrier formation. Rice (Oryza sativa)induciblyforms an ROL barrier under stagnant conditions, while a few wetland plantsconstitutivelyform one under aerated conditions. Here, we evaluated the formation of a constitutive ROL barrier in a total of four accessions from two wild rice species. Three of the accessions were wetland accessions ofO. glumaepatula, and the fourth was a non-wetland species ofO. rufipogon. These species have an AA type genome, which allows them to be crossed with cultivated rice. The threeO. glumaepatulaaccessions (W2165, W2149, and W1183) formed an ROL barrier under aerated conditions. TheO. rufipogonaccession (W1962) did not form a constitutive ROL barrier, but it formed an inducible ROL barrier under stagnant conditions. The threeO. glumaepatulaaccessions should be useful for QTL mapping to understand how a constitutive ROL barrier forms. The constitutive barrier of W2165 was closely associated with suberization and resistance to penetration by an apoplastic tracer (periodic acid) at the exodermis but did not include lignin at the sclerenchyma.