Uptake and Fate of Ethephon ([2-Chloroethyl]phosphonic Acid) in Dormant Weed Seeds

Goudey, J. Stephen; Saini, Harvinder Singh; Spencer, Margaret Beale

doi:10.1104/pp.85.1.155

Cited by 15 publications

(9 citation statements)

References 8 publications

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“…1,2 The conversion of ethephon to ethylene takes place at higher pHs. Thus, ethylene can be easily prepared by hydrolyzing ethephon in buffered conditions.…”

Section: Purity Of Ethylene Prepared From Ethephon Decomposition and mentioning

confidence: 99%

Ethylene preparation and its application to physiological experiments

Zhang

Wen

2010

Plant Signaling & Behavior

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“…1,2 The conversion of ethephon to ethylene takes place at higher pHs. Thus, ethylene can be easily prepared by hydrolyzing ethephon in buffered conditions.…”

Section: Purity Of Ethylene Prepared From Ethephon Decomposition and mentioning

confidence: 99%

Ethylene preparation and its application to physiological experiments

Zhang

Wen

2010

Plant Signaling & Behavior

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“…Plants need oxygen for respiration and energy release. CO 2 fixation is limited by environmental stresses, such as cold and high temperature, drought, and salt stress which reduce NADP + regeneration and thus induce accumulation of ROS including hydrogen peroxide (H 2 O 2 ), superoxide radical (O 2− ), and hydroxyl radicals (OH − ) in leaves [45] [46]. Previous cotton research showed that premature leaf senescence, reflected as aggregated membrane damage, lipid peroxidation, and decreased photosynthesis, is a result of imbalance of ROS metabolism.…”

Section: Discussionmentioning

confidence: 99%

“…Ethephon decomposition results in the release of chloride, ethylene, and phosphate, which means non-ethylene responses may exist. In weed seed germination studies only a small portion of 14 Clabeled ethephon was released as ethylene [45]. Others have also shown low and inconsistent ethephon conversion efficiency [46] [49].…”

Section: Discussionmentioning

confidence: 99%

Effect of 1-MCP on Cotton Plants under Abiotic Stress Caused by Ethephon

Chen¹,

Cothren²,

Chen³

et al. 2014

AJPS

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Many environmental stress factors have been identified to increase square and boll abscission and thus result in reduced cotton yield. Under stress conditions, ethylene is elicited. Ethylene peaks before abscission to promote the formation of the abscission layer and plays a major role in early season square and boll abortion in cotton (Gossypium hirsutum L.). In addition, ethylene stimulates the leaf senescence process. Thus, it is desirable to protect plants from ethylene-induced fruit loss and premature leaf senescence under stress conditions. The objective of this study was to evaluate the ability of 1-methylcyclopropene (

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“…Some investigators claimed that ethephon is not translocated at all [10,12,13] ; others demonstrated good and rapid translocation of 14 C-ethephon [21,23,24] . Still others reported that translocation occurs in some tissues but not in others [13,20], or that the moving compounds are actually labelled products of the 14 C-ethephon applied [9,13,14] . The present data support the view that translocation is limited or does not occur, but as the studies were conducted with old tissues (leaves 18 months old, fruit and pedicels 6 months old), the data fit also the conclusion of immobility in older tissues [13,20] .…”

Section: Discussionmentioning

confidence: 99%

Quantification of ethephon requirements for abscission in olive fruits

Ben-Tal

1992

Plant Growth Regul

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Ethepon is used commercially in Israel to facilitate mechanical harvesting or hand picking of olive fruits, but the results are often not satisfactory, due to insufficient reduction of the fruit removal force . Studies with 14 C-ethephon were carried out to follow the fate of the applied ethephon from treatment until fruit harvest and to determine the actual uptake and efficiency of the sprayed compound .Only a small portion (less than 3%) of the applied ethephon actually penetrated the target tissue i .e . the pedicels, and released the ethylene responsible for promoting fruit loosening . There was almost no translocation of ethephon from other organs (leaves, fruits) to the fruit pedicels . Extended imbibition in the ethephon solution increased ethephon uptake, which was also enhanced by higher ambient temperatures . Penetration of ethephon varied among different tissues (leaves, fruits and pedicels) . Field applications enabled some calculations of the relationship between the amount of ethephon applied and that actually required to achieve proper fruit loosening . . IntroductionTreatments with (2-chloroethyl) phosphonic acid (ethephon) to enhance fruit ripening have been known for many years [1,17] . More specifically, ethephon has been used to promote fruit abscission and to enable to easy hand picking or mechanical fruit harvesting in cherries [8], apple [11], olive [15], citrus [25], macadamia [16] and many others [17] .In the cited publications, information was given regarding ethephon concentrations and volumes, the components of the spray solutions, climatic conditions at the time of application, and the degree of success achieved in comparison with controls .In order to introduce mechanical harvest of olives (Olea europeae L .), manuals on the use of ethephon were distributed to olive growers [2,3,5] . However, results were inconsistent . Sometimes, treated trees failed to drop their fruits or only 397 partial fruit drop occurred . Complaints were received concerning failure to achieve satisfactory fruit loosening and expense of the method . Satisfactory fruit loosening was achieved mostly when orchards were sprayed with 40001 ha -' , divided into two sprays at an inverval of 20-30 minutes . The concentration of the commercial 'Ethrel' used was 0 .25-0 .3%, which cost $600-720 ha -' in addition to the other expenses of two sprayings . Reductions in ethephon concentrations, or smaller spraying volumes, resulted in fruit removal force (FRF) values too high to ensure satisfactory (> 85% fruit drop) mechanical harvest [4,6,18] . Understanding the reasons for ineffective treatments, and achieving a major reduction in spraying costs, were necessary. Employing 14 C-ethephon to study actual uptake, translocation, rate of ethylene released, and the relationship between these factors and fruit abscission, seemed to be the only solution .

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Uptake and Fate of Ethephon ([2-Chloroethyl]phosphonic Acid) in Dormant Weed Seeds

Cited by 15 publications

References 8 publications

Ethylene preparation and its application to physiological experiments

Ethylene preparation and its application to physiological experiments

Effect of 1-MCP on Cotton Plants under Abiotic Stress Caused by Ethephon

Quantification of ethephon requirements for abscission in olive fruits

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