Application of an Analog of 9, 10-ketol-octadecadienoic acid (KODA), Affected Flower Bud Formation and MdTFL1 and MdFT1 Gene Expressions in Apple Buds under Heavy-crop and Shade Conditions

Kittikorn, M.; Okawa, Katsuya; Ohara, Hitoshi; Kondo, Satoru; Kotoda, Nobuhiro; Wada, Masato; Yokoyama, Mineyuki; Ifuku, Ohji; Murata, Ariake; Watanabe, Naoharu

doi:10.21273/jashs.138.2.102

Cited by 4 publications

(3 citation statements)

References 28 publications

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“…Meristem fate in apple buds is regulated by genetic, physiological, and chemical signals. Exogenous application of compounds including GA 4 (Looney et al, 1985), NAA (Harley et al, 1958;McArtney et al, 2007), ethylene (McArtney et al, 2007Williams, 1972), and an analog of 9,10-ketol-octadecadienoic acid (Kittikorn et al, 2013) exhibits florigenic activity in apple. In this work, we have shown that applying NAA during the period when meristems are normally doming promotes flower bud formation.…”

Section: Resultsmentioning

confidence: 99%

“…Recent research has revealed that the proteins encoded by FLOWERING LOCUS T (FT) in Arabidopsis and its orthologs in other plant species is a key component of florigen (Corbesier et al, 2007;Lin et al, 2007;Tamaki et al, 2007;Zeevart, 2006). Kittikorn et al (2013) reported that application of 9,10-ketol-octadecadienoic acid increased MdFT1 expression and flower bud formation in apple. Because NAA sprays at different times during the growing season are florigenic, analysis of gene expression after NAA treatments may provide an alternative approach to studying the endogenous control of flower bud formation in apple.…”

Section: Resultsmentioning

confidence: 99%

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Naphthaleneacetic Acid and Ethephon Are Florigenic in the Biennial Apple Cultivars Golden Delicious and York Imperial

McArtney

Greene²,

Schmidt³

et al. 2013

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‘Golden Delicious’ and ‘York Imperial’ are apple cultivars that are prone to develop a biennial bearing habit. A successful chemical thinning program with carbaryl plus 6-benzyladenine applied at the 10-mm fruit diameter stage reduced cropload and increased return bloom of ‘York Imperial’, although the improvement in return bloom resulting from chemical thinning was insufficient to ensure a commercial cropload in the year after treatment (fewer than 10% of spurs developing flowers). A chemical thinning program with multiple applications of a naphthaleneacetic acid (NAA) and ethephon mixture during the period from 36 to 73 days after bloom increased return bloom of ‘York Imperial’ trees to commercially acceptable levels (25% or greater of spurs flowering). NAA applied during the period from 50 to 100 days after bloom (summer NAA program) or from 110 to 140 days after bloom (preharvest NAA program) increased return bloom of ‘Golden Delicious’. When aminoethoxyvinylglycine (AVG) was included with the first NAA spray in a summer program, the efficacy was reduced, indicating that ethylene may be partly involved in the florigenic activity of NAA. Dissection of ‘Golden Delicious’ buds sampled from three locations (Asheville, NC; Amherst, MA; Wenatchee, WA) at ≈14-day intervals beginning 50 days after bloom indicated that the time of floral transition (doming of the meristem apex) occurred during the period from 65 to 105 days after bloom at each location. Thus, NAA applications in a summer program for return bloom coincided with the period when floral determination normally occurred. Preharvest NAA programs effectively promoted return bloom in the experiments where a summer NAA program was also effective. These responses indicate that NAA can trigger floral development within vegetative buds relatively late in the summer and outside of the time period when it is generally believed possible to influence flower bud formation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Naphthaleneacetic Acid and Ethephon Are Florigenic in the Biennial Apple Cultivars Golden Delicious and York Imperial

McArtney

Greene²,

Schmidt³

et al. 2013

horts

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“…In some plants, the intracellular concentration of KODA changes in response to environmental changes, or according to the developmental stage ( Yokoyama et al , 2000 , 2005 ). The application of KODA was initially shown to promote flowering in various plants such as Lemna paucicostata ( Yokoyama et al , 2000 ), Malus pamila ( Kittikorn et al , 2011 , 2013 ), Citrus unshiu ( Nakajima et al , 2016 ), and Pharbitis nil ( Ono et al , 2013 ). KODA also promotes rooting ( Kawakami et al , 2015 ), re-shooting after dormancy ( Sakamoto et al , 2010 , 2012 ; Nakajima et al , 2016 ), and it also increases wheat yield ( Haque et al , 2016 ) and enhances the resistance of certain herbaceous plants to pathogens ( Endo et al , 2013 ; Wang et al , 2016 , 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Developing a platform for production of the oxylipin KODA in plants

Ihara

Wakamatsu

Yokoyama

et al. 2021

Journal of Experimental Botany

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KODA (9-hydroxy-10-oxo-12(Z),15(Z)-octadecadienoic acid) is a plant oxylipin involved in recovery from stress. As an agrichemical, KODA helps maintain crop production under various environmental stresses. In plants, KODA is synthesized from α-linolenic acids via 9-lipoxygenase (9-LOX) and allene oxide synthase (AOS), although the amount is usually low except in the free-floating aquatic plant Lemna paucicostata. To improve KODA biosynthetic yield in other plants such as Nicotiana benthamiana and Arabidopsis thaliana, we developed a system to overproduce KODA in vivo via ectopic expression of L. paucicostata 9-LOX and AOS. The transient expression in N. benthamiana showed that the expression of these two genes is sufficient to produce KODA in leaves. However, stable expression of 9-LOX and AOS (with consequent KODA production) in Arabidopsis plants succeeded only when the two proteins were localized in plastids or the endoplasmic reticulum/lipid droplets. Although only small amounts of KODA could be detected in leaf extracts of transgenic Nicotiana or Arabidopsis plants, subsequent incubation of the extracts increased KODA abundance over time. Therefore, KODA production in transgenic plants stably expressing 9-LOX and AOS requires specific subcellular localization of these two enzymes and incubation of leaf crude extracts, which liberates α-linolenic acid via breakdown of endogenous lipids.

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Usage and action mechanism of oxylipins including jasmonic acid on physiological aspects of fruit production

Kondo

2022

Scientia Horticulturae

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Application of an Analog of 9, 10-ketol-octadecadienoic acid (KODA), Affected Flower Bud Formation and MdTFL1 and MdFT1 Gene Expressions in Apple Buds under Heavy-crop and Shade Conditions

Cited by 4 publications

References 28 publications

Naphthaleneacetic Acid and Ethephon Are Florigenic in the Biennial Apple Cultivars Golden Delicious and York Imperial

Naphthaleneacetic Acid and Ethephon Are Florigenic in the Biennial Apple Cultivars Golden Delicious and York Imperial

Developing a platform for production of the oxylipin KODA in plants

Usage and action mechanism of oxylipins including jasmonic acid on physiological aspects of fruit production

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