DTA-6、SOD_M及Cc对马铃薯地下主茎生长及同化物代谢生理的影响

Effects of DTA-6, SOD_M and Cc on growth and assimilite metabolism in underground stems of potato

大田栽培条件下,以马铃薯荷兰212为材料,叶面喷施植物生长物质2-N,N-二乙氨基乙基己酸酯(Diethyl aminoethyl hexanoate,简称DTA-6)、氯化胆碱(Choline chloride,简称Cc)以及SOD模拟物(简称SODM),测定地下主茎鲜重、干重、蔗糖、蔗糖转化酶活性、淀粉、淀粉酶活性变化以及可溶性糖等含量的变化,研究不同植物生长物质对马铃薯地下主茎生长及碳代谢生理指标的影响。结果表明:从喷药后16 d开始,Cc和SODM处理均能大幅提高地下主茎蔗糖的含量,其中Cc处理平均比CK增加36.68%,SODM处理较CK高出30.36%。同时喷施Cc后40 d和48d淀粉酶活性提高,平均增幅为35.11%。从喷药后32 d开始,DTA-6和Cc处理对转化酶活性也具有提高的效应,DTA-6处理平均提高了35.75%,Cc处理平均提高了34.79%,但方差分析结果表明差异不显著。另外SODM处理能够极显著降低块茎膨大时期地下主茎内淀粉含量,而Cc处理可极显著提高此时期地下主茎的可溶性糖含量。

Using the potato （Solanum tuberosum L.）cultivar‘Helan-212’as test material,three treatments of plant growth substances,including diethyl aminoethyl hexanoate （DTA-6）,choline chloride （Cc）and SOD simulation material （SODM）,were employed for foliar spray,and the fresh weight and dry weight of underground stems,the con-tents of sucrose,starch and soluble sugar,and the activities of invertase and amylase were measured,so as to compare the differences of growth of underground stems and physiological parameters of carbon metabolism in potato under different treatments .The results showed that,compared with CK,the content of sucrose was significantly increased by the treat-ments of Cc and SODM from the 16th day after spraying,with a rate of 36 .68%and 30 .36%,respectively .What’s more,the activity of amylase was also significantly increased by the treatment of Cc at the 40th and 48th day after spray-ing,with a rate of 35 .1 1%on average .The activity of invertase was increased by the treatment of Cc and DTA-6 from the 32nd day after spraying,but the analysis of variance showed that the difference was not significant .Furthermore,the treatment of SODM could reduce the starch content significantly,while the treatment of Cc could increase the content of soluble sugar significantly at tuber expansion period .