scholarly journals Inhibition of Auxin Transport from the Ovary or from the Apical Shoot Induces Parthenocarpic Fruit-Set in Tomato Mediated by Gibberellins

2010 ◽  
Vol 153 (2) ◽  
pp. 851-862 ◽  
Author(s):  
Juan Carlos Serrani ◽  
Esther Carrera ◽  
Omar Ruiz-Rivero ◽  
Lina Gallego-Giraldo ◽  
Lázaro Eustáquio Pereira Peres ◽  
...  
Keyword(s):  
Auxin Transport ◽  
Fruit Set ◽  
Parthenocarpic Fruit ◽  
Apical Shoot

scholarly journals Functional analysis of SlNCED1 in pistil development and fruit set in tomato (Solanum lycopersicum L.)

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Wenbin Kai ◽  
Ying Fu ◽  
Juan Wang ◽  
Bin Liang ◽  
Qian Li ◽  
...  
Keyword(s):  
Fruit Set ◽  
Ovary Development ◽  
Parthenocarpic Fruit ◽  
Full Bloom ◽  
Solanum Lycopersicum L ◽  
Hormonal Imbalance ◽  
Before And After ◽  
Transcription Factor Genes ◽  
Important Regulator ◽  
Pistil Development

AbstractAbscisic acid (ABA) is an important regulator of many plant developmental processes, although its regulation in the pistil during anthesis is unclear. We investigated the role of 9-cis-epoxycarotenoid dioxygenase (SlNCED1), a key ABA biosynthesis enzyme, through overexpression and transcriptome analysis in the tomato pistil. During pistil development, ABA accumulates and SlNCED1 expression increases continually, peaking one day before full bloom, when the maximum amount of ethylene is released in the pistil. ABA accumulation and SlNCED1 expression in the ovary remained high for three days before and after full bloom, but then both declined rapidly four days after full bloom following senescence and petal abscission and expansion of the young fruits. Overexpression of SlNCED1 significantly increased ABA levels and also up-regulated SlPP2C5 expression, which reduced ABA signaling activity. Overexpression of SlNCED1 caused up-regulation of pistil-specific Zinc finger transcription factor genes SlC3H29, SlC3H66, and SlC3HC4, which may have affected the expression of SlNCED1-mediated pistil development-related genes, causing major changes in ovary development. Increased ABA levels are due to SlNCED1 overexpresson which caused a hormonal imbalance resulting in the growth of parthenocarpic fruit. Our results indicate that SlNCED1 plays a crucial role in the regulation of ovary/pistil development and fruit set.

The effects of pollination methods and auxin applications upon parthenocarpic fruit set and development in tomato

1985 ◽  
Vol 27 (1-2) ◽  
pp. 1-8 ◽  
Author(s):  
Supada Chareonboonsit ◽  
Walter E. Splittstoesser ◽  
William L. George
Keyword(s):  
Fruit Set ◽  
Parthenocarpic Fruit ◽  
Pollination Methods

Parthenocarpic fruit set in triploid watermelon induced by CPPUand 2,4-D applications

2005 ◽  
Vol 45 (3) ◽  
pp. 209-213 ◽  
Author(s):  
J.V. Maroto ◽  
A. Miguel ◽  
S. Lopez-Galarza ◽  
A. San Bautista ◽  
B. Pascual ◽  
...  
Keyword(s):  
Fruit Set ◽  
Parthenocarpic Fruit ◽  
Triploid Watermelon

scholarly journals Net Enclosure of ‘Honeycrisp’ and ‘Gala’ Apple Trees at Different Bloom Stages Affects Fruit Set and Alters Seed Production

Agronomy ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 478 ◽  
Author(s):  
Mokhles Elsysy ◽  
Sara Serra ◽  
Phil Schwallier ◽  
Stefano Musacchi ◽  
Todd Einhorn
Keyword(s):  
Seed Production ◽  
Fruit Set ◽  
Insect Pests ◽  
Fruit Size ◽  
Quality Attributes ◽  
Parthenocarpic Fruit ◽  
Apple Trees ◽  
Apple Production ◽  
Commercial Crop ◽  
Mature Seeds

Thinning is a critical but challenging practice in apple production, especially for organic producers. The objective of this experiment was to determine if exclusion netting, used to manage insect pests and stress, could reduce fruit set and thinning requirements of ‘Gala’ and ‘Honeycrisp’ apple trees in Michigan and Washington, U.S.A., respectively. Nets were closed around whole canopies at different timings based on a predetermined percentage of open flowers. In 2017 and 2018, netted trees set a full commercial crop regardless of percentage of open bloom at the time of netting, including prebloom enclosures. Fruit set and yield of netted ‘Honeycrisp’ trees were significantly lower than non-netted, nonthinned controls but similar to non-netted hand-thinned controls. ‘Gala’ fruit set and yield did not differ among treatments. Exclusion netting markedly reduced the number of mature seeds and increased the number of nonfertilized seeds in both cultivars. Pollinator exclusion to ‘Gala’ in a frost year increased parthenocarpic fruit set two-fold compared to non-netted trees. Fruit size, shape, and quality attributes of ‘Gala’ were were similar among treatments, but ‘Honeycrisp’ fruit were significantly smaller than hand-thinned, non-netted controls. Netting may constitute an alternative, viable strategy to manage fruit set but requires testing on different cultivars.

scholarly journals EFFECTS OF INDIGENOUS AND FOREIGN POLLINIZERS ON THE YIELD AND FRUIT CHARACTERISTICS OF DATE PALM CULTIVAR KHALAS

2020 ◽  
Vol 51 (1) ◽  
Author(s):  
Munir & et al.
Keyword(s):  
Saudi Arabia ◽  
Date Palm ◽  
Fruit Set ◽  
Block Design ◽  
Pollen Grains ◽  
Dry Weight ◽  
Soluble Solids ◽  
Parthenocarpic Fruit ◽  
Fruit Characteristics ◽  
Palm Trees

This research was carried out at Research and Training Station, Date Palm Research Center of Excellence, King Faisal University, Al-Ahsa, Saudi Arabia during 2017 and 2018 to investigate the effects of indigenous and foreign pollinizers on the yield and physicochemical fruit characteristics of date palm cv. Khalas. Pollen grains of different date palm male pollinizers were collected from different geological locations of Saudi Arabia and Egypt. Fifteen twelve-year-old date palm trees were selected for the experiment, for which five spathes for each palm were selected per replication. The experiment was laid out as a Randomized Complete Block Design with three replicates for each treatment. The findings of the present study showed significant differences among pollinizer sources. Female date palms pollinated with indigenous male pollen grains (Al-Ahsa, Saudi Arabia) exhibited superior results regarding fruit set percentage, parthenocarpic fruit percentage, tamar fruit percentage, fruit drop percentage, total number of fruit nodes per bunch, bunch weight, pulp weight, pulp ratio, seed ratio and pulp:seed ratio, fruit fresh weight, fruit dry weight, fruit length, fruit width, fruit volume, seed weight, seed length, seed width, fruit moisture content and total soluble solids. It is can be concluded that although the response to pollination and fertilization of date palm is species dependent, however, the indigenous cultivar Khalas was more responsive to the local male types than the foreign males for better fruit set, higher yield and best fruit quality traits.

scholarly journals Evaluation of GA4+7 plus 6-Benzyladenine as a Frost-rescue Treatment for Apple

2014 ◽  
Vol 24 (2) ◽  
pp. 171-176 ◽  
Author(s):  
Steven McArtney ◽  
Duane Greene ◽  
Terence Robinson ◽  
James Wargo
Keyword(s):  
United States ◽  
Minimum Temperature ◽  
Fruit Set ◽  
The United States ◽  
Parthenocarpic Fruit ◽  
Market Prices ◽  
Fruit Number ◽  
Rescue Treatment ◽  
Production Areas ◽  
Stimulation Of

Freeze events during bloom can be a relatively frequent occurrence in many apple (Malus ×domestica) production areas in the United States that significantly reduce orchard productivity and profitability. This study investigated the potential for a proprietary mixture of gibberellin A4 + A7 and 6-benzyladenine (GA4+7 plus 6-BA) to increase fruit set and cropping of apple following freeze events at three locations across the United States during bloom in 2012. GA4+7 plus 6-BA increased fruit set in two of five experiments, and increased fruit number and yield per tree in three of five experiments. GA4+7 plus 6-BA increased fruit set and yield of ‘Taylor Spur Rome’ following freezes on two consecutive days during bloom when the minimum temperature reached 23.9 and 28.4 °F. Fruit set was increased due to a stimulation of parthenocarpic fruit growth. Using locally obtained market prices, GA4+7 plus 6-BA treatments increased the crop value of ‘Taylor Spur Rome’, ‘Ginger Gold’, and ‘Jonagold’ by $3842, $977, and $6218 per acre, respectively. Although GA4+7 plus 6-BA application(s) after a freeze increased fruit set and cropping in some instances, tree yields were well below the average yields previously obtained in the test orchards.

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