光质对马铃薯试管薯形成的影响

以两个试管薯形成能力不同的马铃薯脱毒试管苗为材料，研究不同光质(白光、红光、蓝光)对马铃薯试管苗生长和试管薯形成的影响.结果表明：红光下试管苗叶片的净光合速率、可溶性糖含量和生物量最高，试管苗叶片数多.蓝光对试管苗干物质含量和试管苗发育后期的结薯数量以及结薯期提前有明显促进作用，但对试管苗株高有明显抑制作用.白光下试管苗净光合速率和干物质含量最低.不同品种试管薯的形成对光质的要求有一定差异.总之，壮苗培养阶段采用红光，试管薯诱导阶段采用蓝光处理利于提高试管薯产量.

Effects of light quality on microtuber induction of Solanum tuberosum L

With the detoxified test-tube seedlings of two Solanum tuberosum L. v
arieties as test materials, this paper studied their development and microtuber
induction under effects of different light quality (red, blue, and white lights)
. Under red light, the seedlings leaf net photosynthetic rate, soluble sugar con
tent, and biomass were the highest, and the leaf number was the greatest. Blue l
ight increased the seedlings dry matter content and microtuber number, advanced
the date of microtuber initiation, but inhibited seedlings height. Under white l
ight, the seedlings had the lowest net photosynthetic rate and dry matter conten
t. Different S. tuberosum varieties had definite differences in the demand o
f light quality for their microtuber induction. Applying red light at seedlings
development stage and supplying blue light at microtuber induction stage could g
ain higher productivity.