Effect of 1 Methylcyclopropene on the Physiology and Yield

Effect Of 1 Methylcyclopropene On The Physiology And Yield-Free PDF

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Cotton Crop,Gossypium hirsutum,Unique about cotton. 9 Perennial grown as an annual,9 Indeterminate growth habit. 9 Complex flowering fruiting habit,9 Very responsive to environment and management. 1 Methylcyclopropene,New PGR from AgroFresh,Approved for use in fruit and vegetable EPA. Decreases or delays the effect of ethylene,Occupies the ethylene receptors sites.
Affinity to receptor 10 timer greater than ethylene. Very stable and non toxic,Molecular weight of 54 g and formula of C4H6. Blankenship and Dole 2003,1 MCP Reports,Decreased membrane leakage in cut petunia flowers. Serek et al 1995, Reduced abscission in apples Dal Cin et al 2005 and Byers et. Prevented abscission of citrus Zhong et al 2001 Sisler et al. Delayed abscission of harvested cherry tomatoes,Moualem et al 2004. Enhanced wheat tolerance to heat stress Hays et al 2007. Hypothesis,9 inhibit stress responses, 1 MCP 9 higher growth rates and less fruit abscission.
9 higher and less variable yields,Objectives,1 MCP Effects on the physiology and yield. Field grown cotton,Heat stressed cotton plants,Water stressed cotton plants. Effect of 1 MCP on Cotton Yield,Field Study Fayetteville and Marianna AR. Treatments,1 Untreated control,2 1 MCP 10 g ai ha at pin head square PHS. 3 1 MCP 10 g ai ha at first flower FF,4 1 MCP 10 g ai ha at FF at FF 2 weeks.
Measurements,Yield and components of yield seedcotton. Stress Level Antioxidant Enzymes,Percentage Boll Abscission and Boll Weight. Effect of 1 MCP on Cotton Yield,b ab a 1 MCP at FF. 4500 1 MCP at FF and FF 2,Yield kg ha,2500 b ab a,Seedcotton Yield Lint yield Seed Production. Effect of 1 MCP on Boll Weight and Abscission,Boll node 5 Boll node 11.
Weight Abscission Weight Abscission,Untreated control 5 63 b 16 a 5 21 c 36 a. 1 MCP at PHS 5 94 ab 8 a 5 25 bc 54 a,1 MCP at FF 6 56 a 8 a 5 79 ab 36 a. 1 MCP at FF at FF,5 92 a 34 a,Boll tagged at the spraying day of treatment 3. Boll tagged at the spraying day of treatment 4, Rows with the same letters are not significant different P 0 05 compared to the untreated control. Effect of 1 MCP on Glutathione Reductase,CONTROL 1 MCP at FF 1 MCP at FF and FF 2.
GR Activity mmol g fresh wt,600 a a a b b b,1 week after FF 1 week after FF 2weeks. Effect of 1 MCP on,Water stressed cotton,Effect of 1 MCP on Cotton Under Water Stress and. Well Watered Conditions,TREATMENTS,1 Untreated control in well watered conditions. 2 1 MCP 10 g ai ha at first square in well watered conditions. 3 Untreated control in water stress conditions, 4 1 MCP 10 g ai ha at first square in water stress conditions. Measurements, Water Relations Stomatal Resistance and Water Potential.
Stress Level Glutathione Reductase enzyme, Effect of 1 MCP on stomatal resistance with and without water deficit. 1 MCP was applied at day 0 and measurements were done at midday. 1 MCP Normal 1 MCP Stress,40 UNT Normal UNT Stress. Resistance s cm 35,0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15. Days After Treatment, Effect of 1 MCP on cotton leaf water potential with and without water deficit. The days 5 11 and 15 correspond to the end of each stress cycle. 35 b UNT R No rm al 1 MC P No rm al,UNT R S tre s s e d 1 MC P S tre s s e d.
Bars Negative Values,D a ys A fte r T re a tm e n t. Effect of 1 Methylcyclopropene on the Physiology and Yield of Cotton Cotton Crop GossypiumGossypium hirsutumhirsutum Unique about cottonUnique about cotton 9Perennial grown as an annual 9Indeterminate growth habit 9Complex flowering fruiting habit 9Very responsive to environment and management 1 Methylcyclopropene New PGR from AgroFresh Approved for use in fruit and vegetable EPA

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