摘要
喷施不同浓度的赤霉素(GA)于4种不同类型的甜叶菊品系叶表面,考察外源激素处理对其主要农艺性状、糖苷含量及糖苷产量的影响。结果表明:(1)赤霉素处理组同对照组相比,处理后株高、节长显著增长,且节间伸长效果主要集中在茎秆中部,叶长显著变短、叶宽显著变窄,叶长宽比值增大,单株干叶产量下降;赤霉素处理间,表现出一定的浓度效应,即随着赤霉素处理浓度增大,表现出一定的株高增加,叶长、叶宽减小的趋势。(2)就提高植株糖苷含量而言,100 mg/L的GA处理(A1)提高了SR1型甜叶菊的RA苷的含量,100 mg/L和300 mg/L GA提高了SR3品系ST苷含量,300 mg/L GA提高了SR2品系ST苷含量。(3)就糖苷产量而言,由于各处理下其干叶产量均显著下降,最终导致所有GA处理中,除300mg/L的GA处理显著提高了SR2的ST苷产量外,其余GA处理均不利于甜叶菊RA或ST糖苷产量的提高。
The experiment was conducted to identify the response of four lines of Stevia rebaudiana Bertoni to exogenous hormones gibberellin（GA） applied on foliar spay.The result was as follows：（1）Compared with control,plant height and node length increased significantly,leaf length showing longer and leaf width being narrower,and leaf length/width ratio increased,after S.rebaudiana lines were sprayed with GA.Plant height was higher as the concentration of GA increased,while leaf length and width declined.（2）For increasing steviol glycosides contents,100 mg/L GA（A1）improved RA content of line SR1;100 mg/L and 300 mg/L GA improved ST content of line SR3;300 mg/L GA improved ST content of line SR2.（3）Except 300mg/L GA improved ST yield of line SR2,the other GA treatments were not shown to improve RA or ST yields,because all the GA treatments declined the dry leaf weight of S.rebaudiana.
出处
《中国糖料》
2012年第1期44-46,共3页
Sugar Crops of China
基金
全国大学生创新性试验计划项目
关键词
甜叶菊
赤霉素
RA苷
ST苷
产量
Stevia rebaudiana
gibberellin
rebaudioside
stevioside
yield
