饱食后的水螅经创伤及修复后体细胞有丝分裂频率的研究

分别将饱食后12h、24h、36h的水螅于胃腔中部横切：1)检查了下段横切面一定重量组织内有丝分裂处于中期的细胞数目；2)经12h、24h、36h修复后检查了上段一定重量愈合组织内有丝分裂处于中期的细胞数目．结果表明：1)水螅在饱食12h、24h、36h后，同一单位重量组织内有丝分裂处于中期的细胞数目以饱食24h时为最高；2)其创伤面经12h、24h、36h修复后，同一单位重量组织内有丝分裂处于中期的细胞数目以修复36h为最高；3)修复后愈合组织内有丝分裂处于中期的细胞数目均相应地高于横切后即时检查的数目．

A STUDY ON SOMATIC MITOTIC FREQUENCY OF WOUDED HYDRA AND REPAIRED HYDRA AFTER FEEDING

The hydra were cut transversely at the middle of their column 12 hours, 24 hours and 36 hours after feeding: 1) The number of metaphase cell was counted by examining the upper organisms, which were cut along the section and then were weighed; 2)The number of metaphase cell was counted in the lower organisms by the same method, when the animals had recovered for 12 hours, 24 hours and 36 hours. The results indicate that: 1) In the same weght after feeding, the number of metaphase cell in the organisms which were cut 24 hours after feeding is the most; 2) In the same weight after repairing, the number of metaphase cell in the organisms which were cut 36 hours after repairing is the most; 3)The number of metaphase cell in the organisms after repairing is accfordingly more than in the organisms which was just examined after being cut.