Home > IV Asian Horticultural Congress – AHC2023 > Gibberellic acid modulates the expression of flowering-related genes and the flower bud rate in apple (Malus domestica)

Articles

Gibberellic acid modulates the expression of flowering-related genes and the flower bud rate in apple (Malus domestica)

Article number

1404_143

Pages

1045 – 1050

Language

English

Abstract

Thinning of excess flowers and fruits is important for improving fruit quality and preventing alternate bearing in apple trees.
In Japan, the utilization of chemical-based flower and fruit thinners is low because their effects are unstable and adversely affect pollinators.
Thus, a novel approach with a more stable fruit thinning effect, labor-efficiency, and environmental safety is needed.
For this purpose, the effects of the application of gibberellic acid (GA) on the expression of floral pathway integrator genes and flower bud rate were investigated for possible application in controlling the number of flowers, because GA is known to suppress flower bud formation in apple the following year.
In 2022, six apple trees in each of the cultivars ‘Fuji’ and ‘Jonagold’ were identified in the orchard at Akita-Pref University in Japan.
The buds of three trees of each cultivar were treated with 200 ppm GA 30 days after full bloom (DAFB). The buds were sampled at 35, 40, 60, and 90 DAFB; total RNA was extracted from them.
The average flower bud rate was lower in the GA treated trees than in the control trees of both cultivars.
GA significantly increased the expression of MdTFL1-1 at 40 DAFB only in ‘Jonagold’. The relative expression of MdTFL1-2 in the GA-treated trees was significantly higher at 60 and 90 DAFB in ‘Jonagold’ and at 60 DAFB in ‘Fuji’. The expression of MdAP1 was significantly downregulated by GA at 35 DAFB in both cultivars.
In Arabidopsis, TFL1, a flowering suppressor gene, represses the expression of AP1, a flowering determinant.
However, in this study, the suppression of MdAP1 expression by GA was observed to precede a significant induction in the expression of MdTFL1 by GA. These observations suggest the involvement of genes other than MdTFL1 that modulate the expression levels of MdAP1 in response to GA.

Publication

IV Asian Horticultural Congress – AHC2023

Authors

R. Sawai, N. Kitamoto, A. Wakabayashi, T. Umebayashi, Y. Yoshida, H. Kanda, H. Imanishi

Keywords

flowering, apple, GA, fruit thinning, gene

Full text

https://doi.org/10.17660/ActaHortic.2024.1404.143

Groups involved

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181. Effects of rain-protected culture in a plastic greenhouse using the whole harvest cultivation method for one-year-old asparagus plants

S. Yamashita | K. Seimiya | K. Yamafuji | T. Taguchi | S. Motoki

182. Estimation of the light extinction coefficients of lateral asparagus ferns using a numerical method

T. Kuroyanagi | H. Yoshikoshi | M. Hikawa-Endo

183. Glycine betaine material affects the growth and yield of asparagus in the long-term harvest production system in a semi-forcing culture

F. Satake | K. Okada | Y. Yoshida | W. Sakata | S. Motoki

184. Mounding increases the rate of thick spears of asparagus

K. Suzuki | Y. Ayabe | A. Kato | S. Motoki

185. Investigation of nutrient solution management in hydroponics using organic fertilizer

T. Endoh | M. Takagaki | P. Suwitchyanon | C. Chaturong

186. Effect of different cultivation methods and environments on the growth and yield of Shimonita-Negi

M. Okabe | K. Obokata | T. Hirose | Y. Hashida

187. Predicting corn salad (Valerianella spp.) weight in a plant factory with artificial lighting (PFAL) using K-Nearest Neighbors algorithm (KNN)

S. Dhammayorddee | C. Chanseetis | A. Kato | M. Takagaki | N. Lookin

188. The effect of water and fertilizer types on growth and yield of supan-supan (Neptunia oleracea) cultivated on flooded Ultisol media

H. Susanti | J. Purnomo | O.A. Kumadawara

189. Effect of low sunlight and high temperature during flower bud differentiation on the cut flower quality of carnation ‘Cherry Tessino’

S. Kamachi | R. Sakai | S. Nagashima | S. Mori

190. Deficit irrigation and fertilizer rates affecting growth, flower quality and physiological changes in tuberous begonia grown in plant factory

C. Inkham | K. Panjama | S. Ruamrungsri

191. Growth and flowering characteristics of Calendula under different light spectra in a controlled environment

M. Munyanont | N. Lu | T. Joilek | D.F. Rachma | M. Takagaki

192. Selection of optimal marigold (Tagetes patula) cultivar as an edible flower in a plant factory

N.Y. Kwak | B.H. Sung | K.P.S. Kumaratenna | Y.Y. Cho

193. Promoting flower yields, photosynthetic pigments and some secondary metabolite in Marguerite daisy (Chrysanthemum frutescens L.) cut flower under the smart farming system by pinching technique

Y. Luekhampa | C. Seelatlao | W. Chareontham | J. Sanitchon | P. Hongpakdee

194. Nutrient deficiencies affect growth and development of vinca

S. Ruamrungsri | C. Inkham | K. Panjama

195. Relationship between Asian ginseng decline and soil chemical property

Md.A.A. Mahmud | Y. Matsubara | T. Ikezawa

196. Influence of different flower vases on the impression of cut flowers

Y. Mitarai

197. Effects of different LED light spectrum on growth and cannabinoid contents of Cannabis sativa L. hybrid ‘KKU’ cultivars under an indoor pot cultivation

P. Nounbunma | P. Hongpakdee | J. Paluka | C. Lapjit

198. Effects of cultivation environmental factors on the growth of the edible cactus (Nopalea cochenillifera) grown under hydroponic conditions

S. Tsuchimoto | K. Okada | K. Kondo | T. Horibe

199. Calcium and magnesium biofortification of the edible cactus Nopalea cochenillifera grown under hydroponic conditions

E. Nishimura | K. Hayashi | T. Horibe

200. Effect of selling area, period, and type on the price of okra (Abelmoschus esculentus L.) in Japan

L. Sato | N. Miyamoto | S. Motoki

201. Comparative analysis of asparagus marketing practices in Europe, North America, and Asia during summer and autumn

S. Yamashita | S. Motoki

202. Edible alleys in the discourse of urban horticulture: a case study on densely built urban renewal districts in Chiayi, Taiwan

T.I. Lee

203. Application of calcium chloride on yield and quality of Capsicum annuum L.

N. Montri | S. Sengseng | R. Deewatthanawong | K. Bunya-atichart

204. Development of a growth state estimation system using a moving camera in strawberry cultivation

S. Matsuo | H. Umeda

205. The impact of adding nanoparticles to the media to speed up the in vitro multiplication stage of banana explants

P. Nugrahani | I.R. Moeljani