Liljeroth Erland
Department of Plant Breeding Research, The Swedish University of Agricultural Sciences, S-268 31 Svalöv, Sweden.
New Phytol. 1995 Aug;130(4):495-501. doi: 10.1111/j.1469-8137.1995.tb04326.x.
The natural rate of root cortical death (RCD) in seminal roots was investigated in different cereals by staining the roots with acridine orange. In all cereals investigated the part of the cortex having stainable nuclei gradually decreased with increased age of the root. Wheat differed from barley, oats and rye in having a much faster rate of RCD In 15-d-old root regions of wheat grown in soil, only 10-20% of the radius of the root had stainable nuclei. In barley, oats and rye the amount of cortex with stainable nuclei varied between 65 and 80% Minor differences in RCD were found between different barley cultivars or accessions. Large variation in RCD was found between different Triticum species: T. monococcum, T. dicoccum and different Aegilops species had much slower RCD than did hexaploid wheat. These results are discussed in relation to microbial colonization of roots and susceptibility to root pathogens.
通过用吖啶橙对根系进行染色，研究了不同谷物种子根的自然根皮层死亡（RCD）率。在所有被研究的谷物中，随着根龄的增加，具有可染色细胞核的皮层部分逐渐减少。小麦与大麦、燕麦和黑麦不同，其RCD率要快得多。在土壤中生长的15日龄小麦根区，只有10%-20%的根半径具有可染色细胞核。在大麦、燕麦和黑麦中，具有可染色细胞核的皮层量在65%至80%之间变化。不同大麦品种或种质之间在RCD方面存在微小差异。在不同的小麦物种之间发现了RCD的巨大差异：一粒小麦、二粒小麦和不同的山羊草物种的RCD比六倍体小麦慢得多。结合根的微生物定殖和对根病原体的易感性对这些结果进行了讨论。
