单芽狗脊蕨的生境观测及其芽胞发育初步研究

初步观察了单芽狗脊蕨的生长环境及其芽胞的发育过程。结果表明,单芽狗脊蕨喜阴湿环境和偏酸性土壤。5月的复叶上开始分化出芽胞,7月成熟的芽胞可在母体上萌发,长出不定须根,芽胞脱离母体后即能在土壤中萌发生长。芽胞越大,其萌芽率和生长速度越大。单芽狗脊蕨一年可产生两代芽胞。进行胎生的单芽狗脊蕨的孢子囊缺失或数目减少。

Primary observation on habitat and gemmae development of Woodwardia unigemmata

The habitat and gemmae development of Woodwardia unigemmata was primarily observed. The results showed that the area with shade and humid environment and slightly acid soil was suitable for the growth of this fern. The gemmae were differentiated on the leaf in May, and the maturity gemmae germinated and grew to adventitious roots in July. Then the gemmae broke away from the original plant and kept on growing in soil. The bigger gemmae had higher germination rate and growth rapidity. Two generations could be pro- duced by this way in a year. Sporangium was lacked or reduced when viviparity was occurred in this plant.