Effects of Timing of CPPU Applications on Rabbiteye Blueberries

NeSmith, D. Scott

doi:10.21273/hortsci.43.5.1446

Cited by 6 publications

(2 citation statements)

References 18 publications

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“…CPPU is a highly active synthetic cytokinin that promotes chlorophyll biosynthesis, cell division, and cell expansion [ 17 , 18 ]. 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 ].…”

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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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: 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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“…For instance, there was no significant increase in yield for ‘Sharpblue’ and ‘Santa Fe’ (regardless of the concentrations), while 5 mg/L CPPU led to remarkably higher yields of the ‘Star’ cultivar. A similar cultivar-dependent response in yields was observed in two cultivars of blueberries following the application of varying concentrations of CPPU at different time intervals [ 238 ]. While CPPU significantly influenced the yield in ‘Climax’ irrespective of the day of application leading to better yields, an early application of CPPU caused a reduced yield production of the ‘Brightwell’ cultivar.…”

Section: Effects Of Cytokinins In Different Phases Of Horticulturamentioning

confidence: 58%

Applications of Cytokinins in Horticultural Fruit Crops: Trends and Future Prospects

et al. 2020

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Cytokinins (CKs) are a chemically diverse class of plant growth regulators, exhibiting wide-ranging actions on plant growth and development, hence their exploitation in agriculture for crop improvement and management. Their coordinated regulatory effects and cross-talk interactions with other phytohormones and signaling networks are highly sophisticated, eliciting and controlling varied biological processes at the cellular to organismal levels. In this review, we briefly introduce the mode of action and general molecular biological effects of naturally occurring CKs before highlighting the great variability in the response of fruit crops to CK-based innovations. We present a comprehensive compilation of research linked to the application of CKs in non-model crop species in different phases of fruit production and management. By doing so, it is clear that the effects of CKs on fruit set, development, maturation, and ripening are not necessarily generic, even for cultivars within the same species, illustrating the magnitude of yet unknown intricate biochemical and genetic mechanisms regulating these processes in different fruit crops. Current approaches using genomic-to-metabolomic analysis are providing new insights into the in planta mechanisms of CKs, pinpointing the underlying CK-derived actions that may serve as potential targets for improving crop-specific traits and the development of new solutions for the preharvest and postharvest management of fruit crops. Where information is available, CK molecular biology is discussed in the context of its present and future implications in the applications of CKs to fruits of horticultural significance.

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Effects of the cytokinins 6-benzyladenine and forchlorfenuron on fruit-, seed- and yield parameters according to developmental stages of flowers of the biofuel plant Jatropha curcas L. (Euphorbiaceae)

Fröschle¹,

Horn²,

Spring

2016

Plant Growth Regul

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Effects of Timing of CPPU Applications on Rabbiteye Blueberries

Cited by 6 publications

References 18 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

Applications of Cytokinins in Horticultural Fruit Crops: Trends and Future Prospects

Effects of the cytokinins 6-benzyladenine and forchlorfenuron on fruit-, seed- and yield parameters according to developmental stages of flowers of the biofuel plant Jatropha curcas L. (Euphorbiaceae)

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