中国农业科学 ›› 2007, Vol. 40 ›› Issue (1): 70-77 .

• 耕作栽培·生理生态 • 上一篇    下一篇

脱毒和生长调节剂对甘薯内源激素含量及块根产量的影响

张立明,王庆美,何钟佩   

  1. 山东农业科学院作物研究所
  • 收稿日期:2006-01-18 修回日期:1900-01-01 出版日期:2007-01-10 发布日期:2007-01-10

Effects of Virus-eliminating and Plant Growth Regulators Ttreatment on the Endogenous Level of Hormone and Root Yield of Sweetpotato

  1. 山东农业科学院作物研究所
  • Received:2006-01-18 Revised:1900-01-01 Online:2007-01-10 Published:2007-01-10

摘要: 【目的】研究脱毒苗和植物生长调节剂对甘薯内源激素含量及块根产量的影响。【方法】以徐薯18甘薯苗为材料,设置脱毒原种苗(VF)、氯化胆碱(LH)浸根、叶面喷洒壮丰安(ZFA)、未脱毒徐薯18苗(CK)4个处理,测定不同处理对块根产量、块根日增长速率、T/R值、不同时期叶片及块根内源激素的影响。【结果】VF和LH处理使甘薯块根干物质产量两年平均分别增产21.0%和24.2%,达极显著水平;ZFA处理使块根干物质产量两年平均增产5.2%,未达显著水平;与对照比较,各处理均可显著提高膨大高峰期块根的日鲜重增长速率;脱毒和氯化胆碱浸根处理可显著降低生长前、中期的T/R值,不同程度地提高功能叶叶片的IAA含量、CTKs含量和GA4含量,提高膨大高峰期块根的CTKs含量、ABA含量和IAA含量,并使高峰期提早出现3~4周;壮丰安处理显著降低了中后期叶片的GA4含量和ABA含量,提高了叶片CTKs含量、IAA含量及生长后期块根的CTKs、ABA及IAA含量,但均未达显著水平。【结论】VF、LH和ZFA处理全面改变了甘薯源、库器官多种激素的含量水平,有效延缓叶片的衰老,延长叶片功能期,控制甘薯地上部的群体并防止茎叶的徒长,使地上部茎叶的生长与地下部块根的膨大更为协调。有利于块根产量的提高。

关键词: 甘薯, 脱毒, 氯化胆碱, 壮丰安, 块根, 内源激素

Abstract: A field trial was conducted to explore the effects of different treatments, such as virus-free cuttings(VF), cuttings soaking with choline chloride(CC), and leaves spraying with Zhuangfengan(ZFA), on the endogenous level of hormone and root yield of sweetpotato. The present results showed that the dry root yield in the treatment of VF and CC increased by 21.0% and 24.2%, respectively, which was 5.2% increment in the treatment of ZFA. In different treatment, the increment ratio of fresh root yield per day increased significantly. In the treatment of VF and CC, the T/R ratio declined significantly, and the contents of zkinetin (CTKs), indole-3-acetic acid (IAA) and gibberellic acid (GA4) in the leaf increased to some extent, the content of abscisic acid (ABA) reduced, and content of CTKs, IAA, ABA in the storage root also increased. In the treatment of ZFA, the content of GA4 and ABA in the leaf decreased significantly, the content of CTKs,IAA in the leaf and the content of CTKs, ABA,IAA in the root increased.

Key words: Sweetpotato, Virus-free, choline chloride, Zhuangfengan, Storage root, Hormone