Noninvasive imaging of hollow structures and gas movement revealed the gas partial-pressure-gradient-driven long-distance gas movement in the aerenchyma along the leaf blade to submerged organs in rice.
Noninvasive imaging of hollow structures and gas movement revealed the gas partial-pressure-gradient-driven long-distance gas movement in the aerenchyma along the leaf blade to submerged organs in rice.
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DOI：
10.1111/nph.17726
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发表时间：
2021-12
期刊：
影响因子：
9.4
通讯作者：
Kawachi, Naoki
中科院分区：
文献类型：
--
作者：
Yin, Yong-Gen;Mori, Yoshinao;Suzui, Nobuo;Kurita, Keisuke;Yamaguchi, Mitsutaka;Miyoshi, Yuta;Nagao, Yuto;Ashikari, Motoyuki;Nagai, Keisuke;Kawachi, Naoki
关键词：
水稻（Oryza sativa）植物具有由通气组织组成的多孔或中空器官，推测通气组织充当空气从水面上方的叶子传播到水下器官的低阻力扩散通道。然而，水稻植株中的气体运动尚未实时可视化。在这项涉及部分浸没的水稻植物的研究中，从水中露出的叶子被注入氮 13 标记的氮 ([13N]N2) 示踪气体，并随着时间的推移监测气体沿着叶片、叶鞘和节间向下的运动。 [13N]N2 气体在 10 分钟内到达工厂底部，比碳 11 光同化物早 20 分钟。 [13N]N2 气体运动可能是通过沿通气组织网络通过作为连接点的节点从叶片到根部的扩散来介导的，这些节点通过 X 射线计算机断层扫描检测到。这些发现意味着气体沿着通气组织扩散，不消耗能量，使植物能够适应水生环境。此外，水稻和深水水稻之间的 [13N]N2 气体运动没有重大差异，这表明这两个品种具有共同的通气机制，尽管它们对洪水的响应不同。
Rice (Oryza sativa) plants have porous or hollow organs consisting of aerenchyma, which is presumed to function as a low‐resistance diffusion pathway for air to travel from the foliage above the water to submerged organs. However, gas movement in rice plants has yet to be visualized in real time. In this study involving partially submerged rice plants, the leaves emerging from the water were fed nitrogen‐13‐labeled nitrogen ([13N]N2) tracer gas, and the gas movement downward along the leaf blade, leaf sheath, and internode over time was monitored. The [13N]N2 gas arrived at the bottom of the plant within 10 min, which was 20 min earlier than carbon‐11 photoassimilates. The [13N]N2 gas movement was presumably mediated by diffusion along the aerenchyma network from the leaf blade to the root via nodes functioning as junctions, which were detected by X‐ray computed tomography. These findings imply the diffusion of gas along the aerenchyma, which does not consume energy, has enabled plants to adapt to aquatic environments. Additionally, there were no major differences in [13N]N2 gas movement between paddy rice and deepwater rice plants, indicative of a common aeration mechanism in the two varieties, despite the difference in their response to flooding.
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DOI：
10.1016/j.nima.2003.08.165
发表时间：
2004-01-11
影响因子：
1.4
作者：
Uchida, H;Okamoto, T;Yamashita, T
通讯作者：
Yamashita, T
影响因子：
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作者：
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通讯作者：
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影响因子：
9.4
作者：
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影响因子：
6.9
作者：
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通讯作者：
Colmer TD
影响因子：
9.4
作者：
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通讯作者：
Sauter, Margret