Abstract
Water cultured propagation technology of Polygonum multiflorum was investigated with Rooting Powder No. 2 (ABT 2) comparison experiments, and the dynamic changes of endogenous hormones including indole acetic acid (IAA), abscisic acid (ABA), zeatin riboside (ZRs) contents and activities of indoleacetic acid oxidase (IAAO), polyphenol oxidase (PPO) were analyzed during rooting period. The results showed that rooting percentage of softwood cutting with 50 mg x L(-1) ABT2 and 10 mg x L(-1) ABT2 + 0.2% Urea + 0.2% KH2PO4 treatments was 94%, rooting percentage of softwood cuttings of control was 46% only. The adventitious rooting displayed three distinct phases i. e. root-inducing, root formation and root-elongating phases. The dynamic changes of contents of endogenous plant hormones (IAA, ABA, ZRs) and activities of IAAO, PPO tested were tightly related to the rooting process of soft-wood cuttings in P. multiflorum. During root-inducing phase the contents of IAA, ABA and ZRs decreased sharply, whereas ZRs content and IAAO activity kept higher level. IAA content reached the peak and PPO activity increased obviously during root formation phase, while IAAO activities and ABA, ZRs contents declined to minimum. During root-elongating phase PPO, IAAO activities were higher and IAA, ABA, ZRs contents kept steady. During rooting ABT2 (50 mg x L(-1)) treatment increased the content of IAA and PPO activity in cuttings, while the opposite result occurred in contents of ZRs, ABA and IAAO activity.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.