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Effect of exogenous spermidine on floral induction, endogenous polyamine and hormone production, and expression of related genes in 'Fuji' apple (Malus domestica Borkh.)
- Source :
- Scientific Reports, Scientific Reports, Vol 9, Iss 1, Pp 1-11 (2019)
- Publication Year :
- 2019
-
Abstract
- Flower bud formation in ‘Fuji’ apple (Malus domestica Borkh.) is difficult, which severely constrains commercial production. Spermidine (Spd) plays an important role in floral induction, but the mechanism of its action is incompletely understood. To investigate the effect of Spd on flowering, 6-year-old ‘Fuji’ apple trees were treated with 1 × 10−5 mol L−1 Spd to study the responses of polyamines [putrescine (Put), Spd and spermine (Spm)], hormones [gibberellins (GA3) and abscisic acid (ABA)], and polyamine-, hormone- and flowering-related genes. Spd application promoted flowering during floral induction by increasing MdGA2ox2 (gibberellin 2-oxidase) through GA3 reduction and increasing MdNCED1 and MdNCED3 (9-cis-epoxycarotenoid dioxygenase) through ABA enrichment during 60 to 80 days after full bloom. The flowering rate as well as the expressions of flower-related genes, except for MdLEY (LEAFY), also increased, thereby promoting flowering. In addition, spraying with Spd significantly increased the contents of endogenous polyamines except for Spm in terminal buds by increasing the expressions of polyamine-associated genes. We hypothesize that the contribution of Spd to flowering is related to crosstalk among polyamines, hormone signals, and related gene expressions, which suggests that Spd participates in the apple floral induction process.
- Subjects :
- 0301 basic medicine
Malus
Spermidine
Physiology
lcsh:Medicine
Spermine
Flowers
Article
03 medical and health sciences
chemistry.chemical_compound
0302 clinical medicine
mental disorders
Putrescine
lcsh:Science
Abscisic acid
Shoot apical meristem
Multidisciplinary
biology
Bud
lcsh:R
fungi
food and beverages
biology.organism_classification
Gibberellins
Horticulture
030104 developmental biology
chemistry
lcsh:Q
Gibberellin
Polyamine
030217 neurology & neurosurgery
Abscisic Acid
Subjects
Details
- ISSN :
- 20452322
- Volume :
- 9
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Scientific reports
- Accession number :
- edsair.doi.dedup.....dea3e4954bfa0a8b6204f955643c8be2