H2 15O translocation in rice was enhanced by 10 μm 5-aminolevulinic acid as monitored by positron emitting tracer imaging system (PETIS)
H2 15O translocation in rice was enhanced by 10 μm 5-aminolevulinic acid as monitored by positron emitting tracer imaging system (PETIS)
复制标题
正电子发射示踪成像系统 (PETIS) 监测到 10 μm 5-氨基乙酰丙酸增强了水稻中的 H2 15O 易位
DOI：
10.1080/00380768.2004.10408578
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发表时间：
2004
影响因子：
2
通讯作者：
S. Mori
中科院分区：
文献类型：
--
作者：
T. Tsukamoto;H. Uchida;H. Nakanishi;S. Nishiyama;H. Tsukada;S. Matsuhashi;N. Nishizawa;S. Mori
摘要5-氨基乙酰丙酸（ALA）在低浓度下具有提高叶绿素合成、光合作用、耐冷性和耐盐性的作用。以水稻为材料，研究了ALA对水稻根系中H2 15 O向地上部转运的影响。CV. Nipponbare）的正电子发射示踪成像系统（PETIS）的真实的时间。10 μ mALA处理后2 ~ 12 min的H215 O转运速率分别为对照的126%、137%和140%。然而，ALA没有影响H2 15 O易位在0.5小时内的治疗。10 μ mALA处理后4 h再用0.1mMABA处理，阿坝处理后0.5h，H215 O的转运速率下降。这些结果表明，ALA可能在1.5h内被吸收并运输到保卫细胞，并发挥扩大气孔开度的作用。
Abstract 5-Aminolevulinic acid (ALA) acts to increase chlorophyll biosynthesis, photosynthesis, cold stress tolerance, and salt tolerance at low concentrations. We studied the effects of ALA on H2 15O translocation from the roots to the shoots of rice plants (Oryza sativa L. cv. Nipponbare) in real time by a positron-emitting tracer imaging system (PETIS). When the plant was treated with 10 μm ALA, the velocity of the H2 15O translocation from 2 to 12 min after absorption increased to 126, 137, 140% that of the control at 1.5, 2.5, and 3.5 h after ALA treatment, respectively. However, ALA did not affect the H2 15O translocation within 0.5 h of treatment. When the plant was treated with 0.1 mM ABA at 4 h after 10 μm ALA treatment, the velocity of the H2 15O translocation decreased at 0.5 h after ABA treatment. Those observations suggested ALA might be absorbed and transported to the guard cells within 1.5 h and functioned to expand the stomatal aperture.