Plant growth regulators to increase fruit set and yield of ‘Rocha’ pear trees in Southern Brazil

Carra, Bruno; Pasa, M.S.; Abreu, Everton Sozo de; Dini, M.; Pasa, C.; Ciotta, Marlise Nara; Herter, Flávio Gilberto; Mello-Farias, Paulo

doi:10.1590/0001-3765202120180860

Cited by 5 publications

(3 citation statements)

References 29 publications

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“…Moreover, TDZ application protects chlorophyll degradation, promotes cell division and elongation (Guo et al, 2011) which reflects on physical fruit quality. The positive role of TDZ on physical properties was previously reported (Carra et al, 2021;Li et al, 2019;Yang et al, 2019). Furthermore, preharvest application of nitrophenolate sodium enhanced physical characteristics of pear fruits.…”

Section: Discussionsupporting

confidence: 58%

“…Thidiazuron (TDZ) is a plant growth regulator promotes cell division and elongation, increased antioxidant activity (Guo et al, 2011;Schmidt et al, 2017;Ali and Abbasi, 2014). Rocha pear trees treated with TDZ at full bloom at 10 ppm increased fruit set, yield and quality (Carra et al, 2021). Thus, the objectives of this study were to enhance fruit set, yield and quality of LeConte pear trees by preharvest foliar spray of nitrophenolate sodium, gibberellic acid4+7 and thidiazuron.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing fruit set, yield and quality of LeConte pear trees by preharvest foliar spray of some plant growth regulators

Attia

2022

SVU-International Journal of Agricultural Sciences

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The present study was conducted during the two seasons 2021 and 2022 on eight-years-old of LeConte pear cultivar for enhancing fruit set, yield and quality by preharvest foliar spray of some plant growth regulators. Preharvest treatments included: control (spray with water only), nitrophenolate sodium (NPS) at 200 ppm, GA4+7 at 10ppm, thidiazuron (TDZ) at 5ppm, NPS plus GA4+7, NPS plus TDZ and NPS plus GA4+7 and TDZ. All preharvest foliar treatments were sprayed at full bloom and after fruit set with ten days. The results showed that treatment with 200 ppm of nitrophenolate sodium increased fruit set, fruit firmness, TSS and carotenes. Increases in shoot length, fruit pedicel length and diameter, fruit set, yield, and acidity were seen after treatment with GA4+7 at 10 ppm. Carotenes and TSS in fruit were decreased. On the other hand, thidiazuron treatment at 5ppm increased pedicel fruit diameter, fruit set, yield, firmness, fruit diameter and acidity. Fruit TSS and carotenes were decreased.

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Section: Discussionsupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Enhancing fruit set, yield and quality of LeConte pear trees by preharvest foliar spray of some plant growth regulators

Attia

2022

SVU-International Journal of Agricultural Sciences

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“…Treatment with 20 to 60 mg/L TDZ revealed a significant reduction in fruit drop and an increase in fruitlet retention in “Hosui” and “Packham’s Triumph” pears, especially at 60 mg/L TDZ, which resulted in the highest fruit number per tree and yields compared to other treatments ( Carra et al, 2017 ). The same author also showed that fruit diameter and fruit weight was markedly increase in response to TDZ ( Carra et al, 2021 ). Both of these increases should be attributed to the increasing TDZ rate, while the crop load and yield decreased linearly.…”

Section: Introductionmentioning

confidence: 95%

Study on exogenous application of thidiazuron on seed size of Brassica napus L.

Zhai

Xie

et al. 2022

Front. Plant Sci.

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Thidiazuron (TDZ) is a novel and efficient cytokinin commonly used in tissue culture, and numerous studies have demonstrated that TDZ can increase berry size. However, no study to date has explored the effect of TDZ on seed size of Brassica napus and the mechanism. To shed light on the effect of TDZ on the seed size of B. napus, four different concentrations of TDZ were applied to B. napus. Results indicated that TDZ treatment could increase the seed diameter and silique length of B. napus to varying degrees and 100 and 200 μmol/L TDZ treatments were the most effective with a 3.6 and 4.6% increase in seed diameter, respectively. In addition, the yield of B. napus was also substantially increased under TDZ treatment. On the other hand, confocal micrographs of embryos and cotyledon cells suggested that embryos and their cotyledon epidermal cells treated with 200 μmol/L TDZ were obviously larger in size than the control. Furthermore, TDZ promoted the upregulation of some key maternal tissue growth-related genes, including two G-protein signaling genes (AGG3 and RGA1) and two transcriptional regulators (ANT and GS2). The expression analysis of genes related to the auxin metabolic pathways, G-protein signaling, endosperm growth and transcriptional regulators confirmed that treatment with TDZ negatively regulated the key genes ABI5, AGB1, AP2, ARF2, and ARF18 during bud development stage and florescence. The results strongly suggested that TDZ might regulate the transcriptional levels of key genes involved in auxin metabolic pathways, G-protein signaling, endosperm growth and transcriptional regulators, which resulted in bigger cotyledon epidermal cells and seed size in B. napus. This study explored the mechanism of TDZ treatment on the seed size of B. napus and provided an important reference for improving rapeseed yield.

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Return Bloom and Yield of ‘Rocha’ Pear Trees are Improved by Ethephon and Paclobutrazol

Carra

Herter

Pinto

et al. 2022

J Plant Growth Regul

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Plant growth regulators to increase fruit set and yield of ‘Rocha’ pear trees in Southern Brazil

Cited by 5 publications

References 29 publications

Enhancing fruit set, yield and quality of LeConte pear trees by preharvest foliar spray of some plant growth regulators

Enhancing fruit set, yield and quality of LeConte pear trees by preharvest foliar spray of some plant growth regulators

Study on exogenous application of thidiazuron on seed size of Brassica napus L.

Return Bloom and Yield of ‘Rocha’ Pear Trees are Improved by Ethephon and Paclobutrazol

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