A novel rejuvenation approach to induce endohormones and improve rhizogenesis in mature Juglans tree.

ABSTRACT:

Background

Juglans is a difficult-to-root tree. In the present study, we successfully rejuvenated stock plants by grafting and then burying them horizontally.

Results

Rooting rates of rejuvenated shoots were 98.1% 20 days after cutting. We recorded spatial and temporal variation in endogenous indole-3-acetic acid (IAA), abscisic acid (ABA), gibberellin A₃ (GA₃) and zeatin-riboside (ZR) under root induction. The four types of endohormones were mainly confined to the phloem sieve and companion cells (S&Cs) at the base of either rejuvenated or mature soft shoots. IAA and ABA levels were higher in rejuvenated shoots than in mature shoots, whereas the opposite was true for GA₃ and ZR. During rooting induction, GA₃ was the first h

SUBMITTER: Liu H 

PROVIDER: S-EPMC5806478 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature