The effects of potassium nitrate and NO-donors on phytochrome A- and phytochrome B-specific induced germination of Arabidopsis thaliana seeds
The effects of potassium nitrate and NO-donors on phytochrome A- and phytochrome B-specific induced germination of Arabidopsis thaliana seeds
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DOI：
10.1079/ssr2002118
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发表时间：
2002-12-01
影响因子：
2.1
通讯作者：
Konjevic, R
中科院分区：
文献类型：
--
作者：
Batak, I;Devic, M;Konjevic, R
含氮化合物，如硝酸钾，能促进不同种类的需光种子的萌发。以光诱导的拟南芥种子萌发为模型系统，我们的数据表明，外源施用硝酸盐、不同的一氧化氮（NO）供体（如有机硝酸盐）或硝普钠后，仅光敏色素A（phyA）特异性诱导的萌发受到影响。刺激效果非常明显。经处理的种子样品在非常短的红光照射时间后达到最大发芽。在很小的程度上，这些物质影响光敏色素B（phyB）特异性诱导发芽。在phyB特异性诱导发芽，硝酸钾是最有效的，但发芽率从未超过50%。最有效的是硝普钠，这几乎没有影响phyB特异性诱导发芽。这些结果证实了相应的光敏色素突变体。
Nitrogenous compounds, such as potassium nitrate, potentiate germination of different species of light-requiring seeds. Using light-induced Arabidopsis thaliana seed germination as a model system, our data suggested that only phytochrome A (phyA)-specific induced germination was affected after the exogenous application of nitrates, different nitric oxide (NO)-donors (such as organic nitrates) or sodium nitroprusside. The stimulative effect was very pronounced. Treated seed samples reached maximal germination after very short periods of red-light irradiation. To a far lesser extent, these substances affected phytochrome B (phyB)-specific induced germination. In phyB-specific induced germination, potassium nitrate was most effective, but germination percentages never exceeded 50%. The least effective was sodium nitroprusside, which practically did not affect phyB-specific induced germination. These results were confirmed using corresponding phytochrome mutants.