KODA and its Analog Treatment Effects on Flowering and Spring Shoot Occurrence in Satsuma Mandarin

. KODA [9-hydroxy-10-oxo-12( Z ), 15( Z )-octadecadienoic acid] has previously been isolated from Lemna paucicostata, and is a compound known to promote flowering in plants. In this study, the effect of KODA on flower production and spring shoot occurrence in mature satsuma mandarin ( Citrus unshiu Marc.) trees was examined in the field. The application of KODA in the summer or autumn had no discernible effect on flower production in the following year. However, when applied in summer, it promoted spring shoot occurrence in the following year, regardless of the number of flowers produced. In addition, C-KODA, a KODA analog, was more effective at producing this effect than KODA. The results suggest that the application of KODA or C-KODA may regulate spring shoot occurrence to improve the imbalance between the number of flower-bearing and vegetative shoots that leads to alternate bearing in

[1]  K. Okawa,et al.  Ethylene production and 1-aminocyclopropane-1-carboxylate (ACC) synthase and ACC oxidase gene expression in apple fruit are affected by 9,10-ketol-octadecadienoic acid (KODA)☆ , 2012 .

[2]  T. Moriguchi,et al.  Effects of 9-hydroxy-10-oxo-12(Z), 15(Z)-octadecadienoic acid (KODA) on lateral primordial formation in the apical flower buds of Japanese pear [Pyrus pyrifolia (Burm.f.) Nakai] , 2012 .

[3]  S. Yoshida,et al.  Effects of fruit load, shading, and 9,10-ketol-octadecadienoic acid (KODA) application on MdTFL1 and MdFT1 genes in apple buds , 2011, Plant Growth Regulation.

[4]  T. Asakura,et al.  Effect of 9-Hydroxy-10-oxo-12(Z), 15(Z)-octadecadienoic Acid (KODA) on Endodormancy Breaking in Flower Buds of Japanese Pear , 2010 .

[5]  S. Yoshida,et al.  Effect of fruit load on 9,10-ketol-octadecadienoic acid (KODA), GA and jasmonic acid concentrations in apple buds , 2010 .

[6]  M. Hamberg,et al.  Structural insights into the evolutionary paths of oxylipin biosynthetic enzymes , 2008, Nature.

[7]  N. Watanabe,et al.  Metabolism of α-ketol derivative of linolenic acid (KODA), a flowering-related compound, in Pharbitis nil , 2007 .

[8]  N. Watanabe,et al.  Endogenous alpha-ketol linolenic acid levels in short day-induced cotyledons are closely related to flower induction in Pharbitis nil. , 2003, Plant & cell physiology.

[9]  S. Shiozaki,et al.  Effects of Gibberellin Synthesis Inhibitors on Flower Setting of Satsuma Mandarin , 1995 .

[10]  H. Inoue Effects of Temperature on Bud Dormancy and Flower Bud Differentiation in Satsuma Mandarin , 1990 .

[11]  Tetsuo Suzuki,et al.  Seasonal Changes of GA-like Substances in Fruit and Current Shoots of Satsuma Mandarin Trees , 1989 .

[12]  M. Agustí,et al.  The inhibitory effect of gibberellic acid on flowering in Citrus , 1982 .