汞对小麦种子活力和萌发代谢的影响

研究Ｈｇ＾２＋对小麦种子活力、幼苗生长、呼吸及淀粉酶、脂肪酶和转氨酶活力的影响。结果表明,Ｈｇ＾２＋能抑制种子萌发过程中淀粉酶、脂肪酶和转氨酶活性,抑制幼苗生长和呼吸代谢,降低种子活力,但浓度低时,在萌发初期有短暂促进作用。     

水分胁迫下Ca^2＋,PEG预处理对小麦幼苗保护酶系统活性的影响

水分胁迫下Ｃａ￣（２＋）、ＰＥＧ预处理对小麦幼苗保护酶系统活性的影响洪法水,马成仓,董振吉,周谋文（淮北煤炭师范学院生物系,淮北２３５０００）ＥＦＦＥＣＴＳＯＦＣＡ￣（２＋）．ＰＥＧＰＲＥＴＲＥＡＴＭＥＮＴＯＮＤＥＦＥＮＳＩＶＥＥＮＺＹＭＥＳＡＣＴＩ...     

激光诱发家蚕孤雌生殖的研究

采用 CO2激光扩束辐照诱发家蚕孤雌生殖,获得着色卵率约60%,转青卵率约31%,孵化率只占转青率的1.85%,全是雌蚕,其发育机制属非减数分裂型,没有出现畸形蚕,茧质未下降。从激光诱发的孤雌生殖的后代中,初步选出两个新类型的可作育种材料。 Abstrect:In order to induce silkworm(Bombyx mori)parthenogenesis,we irradiated eggs by Co2 laser.The results showed,60% colored eggs,31% average bluish eggs,only 1.85% hatchavility among the bluish eggs,all female from those eggs and so an ameiosis parthenogenesis;no malformed worm,thus similar constitution and quality to their parents;and finally two new strains which can be used to breed new strains and furhther studies.