Effects of different light quality on the growth and development of gametophyte of Costaria costata
The effects of blue light,white light and red light on the growth and development of female and male gametophytes of Costaria costata were studied.The results showed that the RGR(relative growth rate)of female gametophyte under red light(3.37%)was significantly lower than that under blue light(5.62%),the RGR of male gametophyte under white light(8.71%)was higher than that under red light(6.73%),but there was no significant difference with that under blue light(7.74%).Under the same light quality,the RGR of female gametophyte was significantly lower than that of male gametophyte.The gametophytes did not develop under red light during the whole culture period.The development rate of blue light group was significantly higher than that of white light group under the same culture days.With the increase of culture days,the growth rate of white-light group and blue-light group increased significantly.The maximum value of white-light group was 21.13%on the 28th day,and that of blue-light group was 67.73%on the 20th day.