摘要
[Objective] The aim was to explore the effects of Ca2＋ on the negative phototropism of Chorophytum comosum root.[Method] C.comosum were cultivated in different concentration of CaCl2 solution with unilateral light illuminated.[Rusult] The Ca2＋ in nutrient solution showed significant effect on the growth and tropic reaction of C.comosum;low concentration of Ca2＋ promoted root growth,while high concentrations of Ca2＋ inhibited the root growth.When the concentration of Ca2＋ was 0.4 mmol/L,the phenomenon of the negative phototropism and the root growth were the most obvious.[Conclusion] The root negative phototropism could be concluded to the comprehensive effect of the endogenous and exogenous Ca2＋.
[目的]研究Ca2+对吊兰根系负向光性的影响。[方法]在恒温条件下,对不同浓度CaCl2溶液中受单侧光照射后吊兰根的生长情况进行了研究。[结果]水培液中的Ca2+对吊兰根的生长和向性反应有显著影响;低浓度Ca2+促进根的生长,高浓度Ca2+抑制根的生长。其中,当Ca2+浓度为0.4mmol/L时,吊兰根的生长和弯曲最为显著。[结论]吊兰根的负向光性受内源与外源Ca2+的综合影响。
基金
Supported by the Natural Science Foundation of Hubei Province (2006ABA186)
the Youth Project of the Provincial Education Department of Hubei Province(Q200727004),the Natural Science Foundation for Youth and Middleages of Provincial Education Department(Q200727003)~~
