CHANGES IN THE ROOT-SYSTEM OF WHEAT SEEDLINGS FOLLOWING ROOT ANAEROBIOSIS .1. ANATOMY AND RESPIRATION IN TRITICUM-AESTIVUM L
CHANGES IN THE ROOT-SYSTEM OF WHEAT SEEDLINGS FOLLOWING ROOT ANAEROBIOSIS .1. ANATOMY AND RESPIRATION IN TRITICUM-AESTIVUM L
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DOI：
10.1093/oxfordjournals.aob.a087222
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发表时间：
1986-11-01
期刊：
影响因子：
4.2
通讯作者：
WIEDENROTH, EM
中科院分区：
文献类型：
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作者：
ERDMANN, B;HOFFMANN, P;WIEDENROTH, EM
小麦（Triticum aestivum L.）CV. Hatri）在生根培养基中缺氧处理的效果。在第一个不定根刚刚出现的非常早期的发育阶段测试植物对胁迫的响应。为了分析不同根系的适应性，将1-3和4-n根的呼吸速率与整个根系的呼吸速率进行了比较。用氮冲洗营养液或用沙淹没都能引起缺氧。与生长在通气良好的介质中的植物相比，这两种应力变体导致种子根和第一不定根的根皮层的细胞间隙显著增加。根尖附近皮层细胞的径向细胞扩大，细胞壁增厚淹没砂培养物和间苯三酚-β-substancees的增加被认为是进一步指标的低氧供应。在低氧条件下促进生长的根4-n表现出较高的呼吸速率，因此总的根呼吸不受限制。
Anatomical changes in roots of wheat seedlings (Triticum aestivum L. cv. Hatri) following oxygen deficiency in the rooting medium were investigated. The response of the plant to stress was tested at a very early developmental stage when the first adventitious roots had just emerged. In order to analyze the adaptation of different roots, respiration rates of the roots 1-3 and 4-n were compared with the respiration rates of the total root system. Oxygen deficiency was induced either by flushing nutrient solution with nitrogen or flooding of sand. In contrast to plants grown in well aerated media, both stress variants led to a significant increase of the intercellular space of the root cortex in seminal and first adventitious roots. Radial cell enlargement of cortical cells near the root tip, cell wall thickenings in flooded sand cultures and an increase in phloroglucinol-stainable substancees were found to be further indicators of low oxygen supply. The roots 4-n which were promoted in growth under hypoxia showed higher respiration rates; hence the total root respiration was not restricted.