scholarly journals Dependence of in Vivo Ethylene Production Rate on 1-Aminocyclopropane-1-Carboxylic Acid Content and Oxygen Concentrations

1988 ◽  
Vol 88 (3) ◽  
pp. 553-558 ◽  
Author(s):  
Wing-Kin Yip ◽  
Xin-Zhi Jiao ◽  
Shang Fa Yang
Keyword(s):  
Carboxylic Acid ◽  
Production Rate ◽  
Ethylene Production ◽  
Acid Content ◽  
Ethylene Production Rate ◽  
Oxygen Concentrations

Regulation of Anthocyanin Synthesis in Apple Skin. II. Involvement of Ethylene

1977 ◽  
Vol 4 (1) ◽  
pp. 123 ◽  
Author(s):  
DJ Chalmers ◽  
JD Faragher
Keyword(s):  
Production Rate ◽  
Ultraviolet Irradiation ◽  
Ethylene Production ◽  
Control Level ◽  
Apple Fruit ◽  
Anthocyanin Synthesis ◽  
Anthocyanin Formation ◽  
Initial Application ◽  
Ethylene Production Rate

Ethylene production by immature apple fruit was stimulated by cycloheximide application, u.v. irradiation and wounding. After fruit were treated with 1 and 10 �g ml-1 cycloheximide, the rate of ethylene production increased to 2 and 10 times the control level, respectively. In skin discs cut from whole fruit (wounded tissue), the rate of ethylene production was stimulated to at least 40 times that in whole fruit. This wound-stimulated ethylene production was partially inhibited by an initial application of cycloheximide. Ultraviolet irradiation of whole fruit stimulated the rate of ethylene production to more than 25 times the control rate after 15 min irradiation. In skin discs, u.v. irradiation caused only a 50-100% increase in ethylene production rate. The effects of certain treatments on ethylene were quantitatively comparable with the effects of the same treatments on anthocyanin formation in whole fruit. Ethylene at 30 �l 1-1 stimulated anthocyanin in skin of immature apples by 16%. Possible mechanisms by which ethylene may stimulate anthocyanin synthesis are discussed.

Ethylene production under high temperature stress causes premature leaf senescence in soybean

2010 ◽  
Vol 37 (11) ◽  
pp. 1071 ◽  
Author(s):  
Maduraimuthu Djanaguiraman ◽  
P. V. Vara Prasad
Keyword(s):  
High Temperature ◽  
Production Rate ◽  
Seed Size ◽  
Leaf Senescence ◽  
Photosynthetic Rate ◽  
Ethylene Production ◽  
Seed Set ◽  
Membrane Damage ◽  
Premature Leaf Senescence ◽  
Ethylene Production Rate

Leaf senescence in soybean (Glycine max L. Merr.) occurs during the later stages of reproductive development and can be triggered or enhanced by high temperature (HT) stress. Ethylene production can trigger premature leaf senescence, but it is unclear whether HT stress produces ethylene and the subsequent influence on physiology and yield of soybean is also uncertain. We hypothesised that ethylene produced under HT stress is involved in premature leaf senescence and that use of an ethylene perception inhibitor would influence physiology and yield. Objectives of this study were to (1) quantify HT-stress-induced ethylene production; (2) quantify effects of HT stress and application of an ethylene perception inhibitor (1-methylcyclopropene; 1-MCP) on source strength traits such as photosynthetic rate, oxidant production, membrane damage and sugar accumulation; and (3) evaluate efficacy of 1-MCP on minimising HT-stress-induced effects on physiological and yield traits. Soybean plants were exposed to HT (38/28°C) or optimum temperature (OT, 28/18°C) for 14 days at the beginning of pod set. Plants at each temperature were treated with 1 μg L–1 1-MCP or left untreated (control). HT stress enhanced ethylene production rates in leaves and pods by 3.2- and 2.1-fold over OT. HT stress decreased photochemical efficiency (5.8%), photosynthetic rate (12.7%), sucrose content (21.5%), superoxide dismutase (13.3%), catalase (44.6%) and peroxidase (42.9%) enzymes activity and increased superoxide radical (63%) and hydrogen peroxide (70.4%) content and membrane damage (54.7%) compared with OT. Application of 1-MCP decreased ethylene production rate and premature leaf senescence traits by enhancing the antioxidant defence system. HT stress decreased seed set percentage (18.6%), seed size (64.5%) and seed yield plant–1 (71.4%) compared with OT, however, foliar spray of 1-MCP increased the seed set percent and seed size, which resulted in a higher yield than the unsprayed control. The present study showed HT stress increased ethylene production rate, which triggered premature leaf senescence, whereas 1-MCP application reduced or postponed premature leaf senescence traits by inhibiting ethylene production.

scholarly journals Temperature and Propylene Effects on Ripening of Green and Black 'Conservolea' Olives

HortScience ◽  
2002 ◽  
Vol 37 (7) ◽  
pp. 1079-1081 ◽  
Author(s):  
George D. Nanos ◽  
Elizabeth Agtsidou ◽  
Evangelos M. Sfakiotakis
Keyword(s):  
Production Rate ◽  
Respiration Rate ◽  
Ethylene Production ◽  
Storage Temperature ◽  
Substantial Effect ◽  
Minor Effect ◽  
Green Color ◽  
Black Olive ◽  
Green Olive ◽  
Ethylene Production Rate

Ripening of detached mature-green and black-ripe olives (Olea europaea L., cv. Conservolea) was studied during storage at 0, 5, 10, or 20 °C in air or air plus 100-200 μL·L-1 propylene. Green olive skin h° remained unchanged after 24 days at 0 or 5 °C in air or air + propylene, while olives partially lost their green color at 10 °C and developed purple color at 20 °C together with a substantial flesh softening. Propylene partially delayed flesh softening only at 10 °C. Respiration of green and black olives increased with storage temperature. Black olives had higher respiration rate than green olives. Propylene had no substantial effect on green or black olive respiration rate, except for an increase in respiration and ripening rates of green olives kept at 20 °C. Ethylene production rate of air- or air + propylene-treated green olives was almost undetectable. Black olives had higher ethylene production rate than green olives and this rate significantly increased with storage temperature. Addition of propylene had only minor effect on ethylene production of black olives. No climacteric respiratory rise or autocatalytic ethylene production was observed in green and black olives.

scholarly journals Postharvest quality of ‘Baigent’ apples as a function of single and multiple preharvest spray aminoetoxivinylglycine and ethephon applications

2019 ◽  
Vol 41 (3) ◽  
Author(s):  
Cristina Soethe ◽  
Cristiano André Steffens ◽  
Fernando José Hawerroth ◽  
Cassandro Vidal Talamini do Amarante ◽  
Angélica Schmitz Heinzen ◽  
...  
Keyword(s):  
Production Rate ◽  
Fruit Quality ◽  
Cold Storage ◽  
Ethylene Production ◽  
Rupture Strength ◽  
Postharvest Quality ◽  
Apple Trees ◽  
Commercial Harvest ◽  
Ethylene Production Rate

Abstract The aim of this work was to evaluate the effect of single and multiple pre-harvest spray aminoethoxyvinylglycine (AVG) applications with or without ethephon, in ‘Baigent’ apple trees cultivated under anti-hail screen and harvesting date on fruit quality after storage. The experiment was conducted in a commercial orchard in the municipality of Vacaria/RS, in the 2014/15 and 2015/16 harvests. Treatments consisted of: control (plants sprayed with water); AVG (125 mg L-1, 30 days before the predicted harvest date; BPHD); ethephon (120 mg L-1, seven BPHD); AVG (62.5 mg L-1 + 62.5 mg L-1, 30 and 20 BPHD); AVG (62.5 mg L-1 + 62.5 mg L-1, 30 and 20 BPHD) + ethephon (120 mg L-1, seven BPHD). Fruits of all treatments were harvested at commercial harvest (harvest 1) and after 14 days (harvest 2). Fruits were evaluated after four months of cold storage (0.5 °C ± 0.2 °C and RH 92 ± 5%). The use of AVG, regardless of single or multiple applications, reduced ethylene production rate, skin yellowing, farinaceous pulp and senescent degeneration incidence and maintained higher pulp firmness values and pulp penetration and skin rupture strength. Ethephon provided fruits with higher farinaceous pulp incidence. Fruit treated with AVG, regardless of single or multiple application and combination with ethephon, presents better quality after cold storage.

Changes in ethylene production and 1-aminocyclopropane-1-carboxylic acid content of pollinated carnation flowers

1983 ◽  
Vol 2 (1-4) ◽  
pp. 1-8 ◽  
Author(s):  
R. Nichols ◽  
G. Bufler ◽  
Y. Mor ◽  
D. W. Fujino ◽  
M. S. Reid
Keyword(s):  
Carboxylic Acid ◽  
Ethylene Production ◽  
Acid Content
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