The number of chromosomes in the root tip cells was observed.
对主栽品种的根尖细胞染色体数进行了观察；
BACKGROUND and AIM: We studied the mutation effects of sodium sulfite and sodium nitrite in root tip cells of Vicia faba.
背景与目的：研究亚硫酸钠和亚硝酸钠对蚕豆根尖细胞的致突变作用。
Effects on mitosis and chromosomal aberrations of tobacco root tip cells were observed by the method of artificially inducing para-nodule treated with 2, 4-d and rhizobium.
通过人工诱导烟草结瘤的方法，观察给予2,4 - D、根瘤菌后，其对烟草根尖细胞有丝分裂和染色体畸变的影响。
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