关键词: 航天诱变, 凤仙花, 叶片形态, 气孔

Abstract: This study focused on the offspring of mutated Impatiens balsamina that was induced by space flight of Shenzhou 4. Comparative analysis of morphological characteristics of the mutant and normal I. balsamina (the control group) was performed. The results showed that, compared to the control group, the offspring of mutagenic I. balsamina variety changed greatly in ratio of leaf length to leaf width and leaf thickness. No significant difference in stomatal width was observed between the two groups, while their stomatal lengths varied significantly. Moreover, morphological mutations in leaves resulted in variations in detached leave wilting curve: the water loss was slower and steadier in mutants than in controls. The results suggested mutation in leaf morphology of mutated I. balsamina induced by space flight was beneficial.

Key words: Mutagenesis induced by space flight, Impatiens balsamina, leaf morphology, stoma