Improvement of Poststorage Quality of Potted Anthuriums
Date Issued
2012
Date
2012
Author(s)
Lin, Jo
Abstract
Anthurium is an important perennial herbaceous flowering foliage plant. Taiwan has superior climate conditions, and thus has potential for exporting potted anthuriums to Japan. This study determined the effects of temperature, duration, and ethylene during dark storage on poststorage quality of potted anthurium, and evaluated the effectiveness of 1-methylcyclopropene (1-MCP) and 6-benzylaminopurine (BA) pretreatment to protect sensitive cultivars.
Dark storage at 10 or 15oC for 5 d resulted in spathe blueing, spathe necrosis or wilting, and spadix browning of anthurium ‘Red Victory’. Poststorage plant appearance did not differ between 10 and 15oC treatment. However, spathes at 10oC treatment exhibited purple spots after storage, and had decreased excitation transfer efficiency (Fv/Fm). The purple spots disappeared and Fv/Fm value recovered after 7 days in the interior environment. After dark storage at 15 or 20oC for 3 or 7 d, ‘Fantasy Love’ had higher percentages of chlorotic leaves and browning spadix at 20oC than 15oC. Poststorage quality of ‘True Love’, ‘Red Queen’, and ‘Leny’ did not differ between 15 and 20oC treatments. Storage for 3 d or 7 d did not affect poststorage quality of ‘Leny’, while ‘True Love’, ‘Fantasy Love’, and ‘Red Queen’ decreased their quality with increased storage duration from 3 d to 7 d. The storability of the four cultivars ranked as: ‘Leny’> ‘Red Queen’> ‘Fantasy Love’ and ‘True Love’.
Six anthurium cultivars were exposed to 0 or 5 μL‧L-1 ethylene during dark storage at 15oC for 5 d. Exposure to ethylene accelerated leaf chlorosis in ‘Red Queen’, leaf chlorosis, spathe necrosis or wilting, and spadix browning in ‘Red King’ and ‘Pink Love’, spathe necrosis or wilting and spadix browning in ‘Red Victory’, and spadix browning in ‘True Love’ and ‘Fantasy Love’. The ethylene sensitivity of the six cultivars ranked as: ‘Red Queen’> ‘Fantasy Love’、’True Love’> ‘Red King’> ‘Pink Love’> ‘Red Victory’. Plants of ethylene-sensitive ‘Red King’ and ethylene-insensitive ‘Red Queen’ were exposed to 0, 1, 3, and 5 μL‧L-1 ethylene during dark storage at 15oC for 5 d. Percentages of chlorotic leaves, necrotic or wilted spathes, and browning spadix of ‘Red Queen’ did not increase with increased ethylene concentration. In contrast, percentages of chlorotic leaves increased, poststorage Fv/Fm value, SPAD-502 value and percentsges of performable flowers decreased with increased ethylene concentration in ‘Red King’.
Pretreatment with 900 nL‧L-1 1-MCP for 6 h deceased percentages of chlorotic leaves, necrotic or wilted spathes, and browning spadix in ‘Red King’, and percentages of blueing spathes, necrotic or wilted spathes, and browning spadix in ‘Red Victory’ after stored in 5 μL‧L-1 ethylene at 15oC for 5 d. The Fv/Fm value in lowest leaves and spathes, and L*, a*, b* value in spathes could be maintained by 900 nL‧L-1 1-MCP pretreatment. Saturation responses occurred with 900 nL‧L-1 1-MCP, while 300-600 nL‧L-1 1-MCP did not prevent anthurium from ethylene damage efficiently. Regardless of 0 or 3 μL‧L-1 ethylene during storage at 15oC for 5 d, BA spraying at 50-150 mg‧L-1 in above ground part deceased percentages of blueing spathes, necrotic or wilted spathes, and browning spadix in ‘Red Victory’.
Pretreatment with 900 nL‧L-1 1-MCP or 100 mg‧L-1 BA could protect anthurium ‘Red Victoy’ from spathe blueing, spathe necrosis or wilting, spadix browning after exposed to 3 μL‧L-1 ethylene during storage at 15oC for 5 d. BA could protect anthurium better than 1-MCP, and pretreatment with both 900 nL‧L-1 1-MCP and 100 mg‧L-1 BA resulted in better poststorage quality than treatment alone. Plants of ‘Red Victory’ at 10oC had better poststorage quality than at 15oC when stored with 3 μL‧L-1 ethylene for 5 d, but the Fv/Fm value in spathe of the 10oC treatment was lower than 15oC treatment during day 0-5 after storage.
In conclusion, best storage temperature for potted anthurium is about 15oC. The storability and ethylene sensitivity of anthurium varied with cultivars. Pretreatment with 900 nL‧L-1 1-MCP or 50-150 mg‧L-1 BA could maintain poststorage quality of anthurium cultivars that sensitive to dark storage and ethylene.
Subjects
1-methylcyclopropene
6-benzylaminopurine
cultivar
dark storage
ethylene
temperature
Type
thesis
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