ACID AND ALKALINE INORGANIC PYROPHOSPHATASES IN SENESCING FLOWERS OF ROSE, CARNATION AND CHRYSANTHEMUM

1976 ◽  
Vol 56 (3) ◽  
pp. 525-530 ◽  
Author(s):  
E. V. PARUPS
Keyword(s):  
Initial Level ◽  
Dianthus Caryophyllus ◽  
Chrysanthemum Morifolium ◽  
Rosa Hybrida ◽  
Cut Flowers ◽  
Chrysanthemum Morifolium Ramat ◽  
Alkaline Enzyme

The activities of the acid and alkaline inorganic pyrophosphatases (EC.3.6.1.1) were determined in the petals of cut flowers of roses (Rosa hybrida L.), carnations (Dianthus caryophyllus L.,) and chrysanthemums (Chrysanthemum morifolium (Ramat.)) kept either in water or in solutions of a flower preservative, and in flowers kept uncut on plants. The use of flower preservative decreased the activity of both pyrophosphatases in roses, did not change it in chrysanthemums, and maintained the alkaline enzyme at essentially the initial level in carnations. The activities of both enzymes were generally greater in the flowers of carnations and chrysanthemums than in roses, excepting the acid pyrophosphatase in uncut chrysanthemums on day 15, or the alkaline pyrophosphatase on days 15 and 17. The activities of both enzymes were essentially similar for each kind of flower indicating that their effect on anabolism or catabolism in flower petals was minimal.

scholarly journals PRODUCTION OF SOME FLOWERS IN HYDROPONICS AND SOILLESS MEDIA

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1171c-1171
Author(s):  
Fahed A. Al-Mana ◽  
Tarik M. El-Kiey
Keyword(s):  
Culture Media ◽  
Dianthus Caryophyllus ◽  
Chrysanthemum Morifolium ◽  
The Other ◽  
Growth And Yield ◽  
Plant Leaves ◽  
Cut Flowers ◽  
Soilless Media ◽  
Nutrient Film Technique ◽  
Soil Mix

Production of five commercial cut flowers in different culture media, namelyI nutrient film technique (NFT), soilless media (perlite and an equal mix of perlite and peatmoss), and soil mix (2 sand: 1 loam by volume), was investigated in controlled fiberglass-house. Two rose varieties (Rosa hybrida var. Baccara and Madina); carnation (Dianthus caryophyllus var. William Sim); Chrysanthemum morifolium var. Delta, and Dahlia hybrida var. variabilis were used. Plants were watered as they needed by the same nutrient solution used for NFT.Generally, growth and yield of Baccara and Madina roses, Chrysanthemum and Dhalia plants were superior in NFT than in the other media. On the contrary, the growth and yield of carnation plants were significantly greater in conventional soil or perlite and peatmoss mix than in NFT or perlite.Flower crops grown in NFT generally reached harvest stage 5-10 days earlier than those grown in the other media except carnation plants. There were variations in the accumulation of N, P, K mg, ca, and Fe in plant leaves among the various culture media.

scholarly journals Influence of Essential Oils on Post-infection Botrytis Damage in Cut Roses1

2018 ◽  
Vol 36 (2) ◽  
pp. 45-57
Author(s):  
Ben A. Bergmann ◽  
John M. Dole
Keyword(s):  
Essential Oils ◽  
Botrytis Cinerea ◽  
Post Infection ◽  
Gray Mold ◽  
Rosa Hybrida ◽  
Thymus Vulgaris ◽  
Cut Flowers ◽  
Cinnamomum Zeylanicum ◽  
Cool Water ◽  
Thyme Oil

Abstract We assessed the degree to which 16 post-infection treatments controlled Botrytis (Botrytis cinerea Pers. ex. Fr.) damage in cut roses (Rosa × hybrida). Additional experiments examined whether essential oils (EO) of cinnamon (Cinnamomum zeylanicum Blume) leaf (CLO), clove (Eugenia caryophyllata Thunb.) bud (CBO), and thyme (Thymus vulgaris L.) (TO) could reduce damage in Botrytis-infected cut roses. The 16 treatments applied to ‘Light Orlando' cut roses differed in reducing Botrytis damage and causing phytotoxicity damage. Only the synthetic fungicide fludioxonil [applied as 0.23 g · L−1 (0.00024 oz · fl oz−1) Medallion®] resulted in the desirable combination of greatly reduced stem termination frequency due to Botrytis damage and relatively minor flower phytotoxicity. When applied to cut rose ‘Freedom' or cultivars with light colored flowers (‘Cool Water', ‘Jessika', ‘Polar Star', ‘Tiffany'), all EO aqueous solutions caused pronounced phytotoxicity damage, but only TO reduced Botrytis damage significantly compared to untreated flowers. Roses exposed to EO vapor rather than an aqueous solution tended to exhibit less phytotoxicity. Vapors of CLO and CBO tended to reduce Botrytis damage less and caused greater flower phytotoxicity than TO vapor and aqueous fludioxonil. Thyme oil vapor exposures of 4.6 and 9.1 ppm warrant further investigation. Index words: Botrytis blight, Botrytis cinerea Pers. ex. Fr., cut flowers, floriculture, fungicide, gray mold, Rosa × hybrida. Chemicals used in this study: Bacillus subtilis (Cease®), bleach (Clorox®), chlorothalonil (Daconil®), copper sulphate (Phyton® 27), fenhexamide (Elevate®), fludioxonil (Medallion®), hydrogen peroxide (ZeroTol® 2.0), iprodione (Chipco® 26019 Flo), potassium bicarbonate (Milstop®), pyraclostrobin + boscalid (Pageant® Intrinsic®). Species used in this study: Rose (Rosa × hybrida) ‘Cool Water', ‘Freedom', ‘Jessika', ‘Polar Star', ‘Tiffany', Botrytis (Botrytis cinerea Pers. ex. Fr.).

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