Search Results
Abstract
In the article “Quality Measurements of Carnation Treatment Solutions in Relation to Flower Silver Distribution and Longevity,” by N. Gorin et al. [Journal 110(1): 117–123. 1985], the following corrections should be noted:
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Page 118. Left column, line 34, 55° should read 550°.
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Page 122. Left column, 3rd part of first formula. Exponent in denominator should read 10.84 not 104.
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Page 122. Left column, equation 5. et should be ct.
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Page 123. Left column, line 5. The word (black) should appear below Ag2S ↓.
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Table 1. The symbol before 0.93 in the left column should be > instead of <,
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Table 3. The last line under the table footnotes should include three dashes (– – –), not one dash (–).
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Table 4. Under the column byKI, the symbol > should appear before 0.93 with Commercial C-fresh and Commercial F.
Abstract
Ethylene treatment affected protease activity in ovaries, but not petals, of cut roses (Rosa hybrida L.) ‘Sonia’. Protease activity in ovaries of ethylene-treated flowers decreased within the first 3 days and then remained at the same level until the 12th day. In ovaries from controls, protease activity decreased from day 6 until day 9 and then remained constant until day 12. Protease activity of petals did not differ significantly between the ethylene-treated and control flowers; it was constant until day 6 and then increased steadily until day 12. Differences between ethylene-treated and control flowers were visible immediately after treatment (day 1) and until day 3, as the sepals of the ethylene-treated flowers reflexed. Later (day 6), this difference disappeared as the sepals of the control flowers also reflexed. On day 9 the outer petals of the ethylene-treated flowers were bluish, whereas the controls were not. There were no other differences in development between treated and control flowers.
Abstract
Various silver containing solutions were evaluated for their effectiveness in extending the life of cut carnations (Dianthus caryophyllus, L. ‘Improved White Sim’) by simple chemical tests of the solutions. Effective solutions formed an immediate white or yellow precipitate (AgI) when 3.0 ml of the solution reacted with 0.15 ml of 2.0 m KI solution, whereas no precipitate formed when reacted with 0.15 ml of 2.0 m NaCI solution. When no precipitate formed with KI, there was insufficient silver in the solution to extend flower life, and hence, no silver was detected in a combined stem and leaf sample or in the flower head (consisting of receptacle, pistil, bracts, calyx and petals). A precipitate forming with both KI and NaCI indicated that the solution contained silver but in the wrong formulation to extend life. Flowers treated with this solution had silver in the combined stems and leaves, but practically none in heads. When solutions were effective, more silver was detected in heads than in the stems and leaves combined.
Abstract
There was an accumulation of total free amino acids (calculated as the sum of the individual amino acids) in corollas from cut ‘Sonia’ roses (Rosa hybrida) stored at 2C (cold-stored flowers) but not in those kept at 20C (control flowers). In cold-stored flowers, senescence was retarded, as indicated by only a slight opening of the corolla and no subsequent petal abscission. Hence, there appeared to be no direct correlation between senescence of cut roses and accumulation of total amino acids in corollas; neither was there a relationship between individual or total free amino acids and protease activity in the corollas from either cold-stored or control flowers. Changes in the contents of all free amino acids, except alanine and lysine, were affected by cold storage. The effect on aspartic acid was statistically significant, but not spectacular. Cold storage delayed the decrease in contents of glutamic acid, asparagine, tyrosine, glycine, leucine, isoleucine and valine, and prevented accumulation of phenylalanine, proline, and histidine. We detected only one theoretically expected interconversion between two amino acids; i.e., glutamic acid to proline, that occurred in corollas from control flowers during the first 6 days of storage. We suggest that the patterns of changes in the contents of tyrosine, valine, isoleucine (or isoleucine plus leucine), and phenylalanine are not restricted to the cultivar Sonia.