Chlorophenoxyacetic acid and chloropyridylphenylurea accelerate translocation of photoassimilates to parthenocarpic and seeded fruits of muskmelon (Cucumis melo)

Li, Xin-Xian; Kobayashi, Fumiyuki; Ikeura, Hiromi; Hayata, Yasuyoshi

doi:10.1016/j.jplph.2010.11.005

Cited by 9 publications

(5 citation statements)

References 44 publications

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“…Hence, CPPU increased the availability of carbohydrates in the bearing shoots and thus improved fruit retention. The result is similar to that reported in kiwifruit [ 26 ] and muskmelon [ 27 ].…”

Section: Discussionsupporting

confidence: 91%

“…This compound also increases fruit set and accelerates fruit enlargement, and has been tested extensively in fruit crops including apple [ 12 ], blueberry [ 19 , 20 ], citrus [ 21 ], Kiwifruit [ 17 ], persimmon [ 22 ] and pear [ 23 ]. There is evidence that CPPU promotes fruit development in kiwifruit by increasing endogenous cytokinins, gibberellins and auxins [ 24 , 25 ], which results in a greater sink strength in the fruit [ 26 , 27 ]. The application of CPPU together with foliar fertilizer also significantly increases fruit set and yield in macadamia [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

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Effect of CPPU on Carbohydrate and Endogenous Hormone Levels in Young Macadamia Fruit

Zeng

Yang

et al. 2016

PLoS ONE

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N-(2-Chloro-4-pyridyl)-N′-phenylurea (CPPU) is a highly active cytokinin-like plant growth regulator that promotes chlorophyll biosynthesis, cell division, and cell expansion. It also increases fruit set and accelerates fruit enlargement. However, there has been no report about the effect of CPPU on fruit development and its physiological mechanism in macadamia. In this study, we investigated the effect of CPPU treatment at early fruit development via foliar spray or raceme soaking at 20 mg·L-1 on fruit set and related physiology in macadamia. Changes in carbohydrate contents and endogenous hormones in leaves, bearing shoots and fruit were also examined. Results showed that CPPU significantly reduced young fruit drop and delayed the wave of fruit drop by 1–2 weeks. The treatment significantly decreased the contents of total soluble sugars and starch in the leaves, but increased them in the bearing shoots and total soluble sugars in the husk (pericarp) and seeds. These findings suggested that CPPU promoted carbohydrate mobilization from the leaves to the fruit. In addition, CPPU increased the contents of indole-3-acetic acid (IAA), gibberellin acid (GA3), and zeatin riboside (ZR) and decreased the abscisic acid (ABA) in the husk. Therefore, CPPU treatment reduced the early fruit drop by increasing carbohydrate availability and by modifying the balance among endogenous hormones.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Effect of CPPU on Carbohydrate and Endogenous Hormone Levels in Young Macadamia Fruit

Zeng

Yang

et al. 2016

PLoS ONE

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“…These results indicated that foliar sprayed CPPU and NAA accelerate the utilization and transport of assimilates from the leaves to the fruits, thus explaining the decrease in carbohydrate level in the leaves. The results are in agreement with the findings of Antognozzi et al (1996) in kiwi fruit, Li et al (2011) in muskmelon and Zeng et al (2016) in macadamia fruit.…”

Section: Leaves Carbohydrate Contentsupporting

confidence: 92%

Effect of NAA and CPPU on Fruit drop, Yield and Quality of Avocado Trees

mostafa

Mostafa

El-Berry

2020

Egyptian Journal of Horticulture

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“…These include auxins, cytokinins, and gibberellins (GAs) which are involved in early seed and fruit development. Other phytohormones such as ABA and ethylene are vital for seed maturation and fruit ripening (Fos et al 2000, Martinelli et al 2009, Bonghi et al 2011, Li et al 2011. In agriculture, this trait is usually observed when the plants are grown in unfavourable conditions such as low or high temperatures, low or high humidity, and low irradiance that may interfere with pollen production, anther dehiscence or pollination.…”

Section: Introductionmentioning

confidence: 99%

Overexpression of oil palm EgDREB1 in tomato decreased fruit sizeand produced parthenocarpic fruits

Azzeme¹,

Abdullah²,

Aziz³

et al. 2020

Biol. plant.

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Drought-responsive element binding (DREB) is involved in the regulation of stress-responsive gene expressions in plants through abscisic acid (ABA)-independent pathway. In this study, constitutive expression of oil palm (Elaeis guineensis) EgDREB1 driven by double strength cauliflower mosaic virus 35S promoter in tomato (Solanum lycopersicum) reduced seed number, produced parthenocarpic fruits, changed morphology of leaves, and increased root biomass of transgenic plants. Early flowering and fruiting of the transgenic lines were observed in the culture vessels. EgDREB1 was specifically expressed in the fruits and its expression was not detected in vegetative tissues (leaves and roots). Altered expression of several endogenous tomato genes involved in the biosynthesis of phytohormones including jasmonic acid, ethylene, auxin, cytokinin, gibberellin (GA) and ABA were observed compared to wild type plants. The expression of AP2-likeethylene transcription factor (LeAP2), allene oxide synthase (LeAOS), allene oxide cyclase (LeAOC), aminocyclopropane-1-carboxylic acid synthase (LeACS), 1-aminocyclopropane-1-carboxylate oxidase 1 (LeACO), auxin responsive factor 8 (LeARF8), auxin/indole-3-acetic acid (LeAux/IAA), cytokinin oxidase/dehydrogenase-like (LeSlCKX1), adenylate isopentenyltransferase (LeSlIPT1), gibberellin 2-oxidase 2 (LeGa2ox2), gibberellin 20-oxidase 4 (LeGa20ox4) and ABAaldehyde oxidase (LeAAO) were different in fruits with reduced seed number compared to parthenocarphic fruits. These results suggest that their expression has significant effects on fruit development in transgenic tomato. EgDREB1 may mediate the expression of some of these genes as dehydration-responsive element binding (DRE) motif were found in their promoter sequences. These data indicate that the EgDREB1 controls fruit development in trsngenic plants by regulating the expression of hormone-associated genes.

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Chlorophenoxyacetic acid and chloropyridylphenylurea accelerate translocation of photoassimilates to parthenocarpic and seeded fruits of muskmelon (Cucumis melo)

Cited by 9 publications

References 44 publications

Effect of CPPU on Carbohydrate and Endogenous Hormone Levels in Young Macadamia Fruit

Effect of CPPU on Carbohydrate and Endogenous Hormone Levels in Young Macadamia Fruit

Effect of NAA and CPPU on Fruit drop, Yield and Quality of Avocado Trees

Overexpression of oil palm EgDREB1 in tomato decreased fruit sizeand produced parthenocarpic fruits

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