Abstract
Healthy ‘Valencia’ and blight-affected ‘Pineapple’ orange [Citrus sinensis (L.) Osbeck] trees, both on rough lemon [C. limon (L.) Burnì, f.] rootstock, had a seasonal pattern of higher Zn in the outer 2.5 cm of the trunk wood in the winter and lower Zn in the summer. The 5-year means for the ‘Valencia’ trees were 5 ppm Zn in February and 3 ppm Zn in July; the blighted ‘Pineapple’ trees contained 21 and 16 ppm Zn (2-year means), respectively. There was no clear seasonal pattern for water-soluble phenolics.
Abstract
Embryos, pseudobulbils, and embryogenic callus were obtained by in vitro culture of undeveloped ovules excised from ripe fruits of the navel orange group (C. sinensis [L.] Osbeck) and lemon (C. limon [L.] Burm. f.). Initial culturing was on Murashige & Skoog (MS) medium in 1% agar. Large numbers of seedlings were produced by subculturing the embryos, pseudobulbils, and embryogenic callus on fresh MS medium with added 6-methylaminopurine.
( Citrus limon ), miniature rose ( Rosa chinensis minima ), azalea ( Rhododendron indicum ‘Formosa’), and wax begonia ( Begonia spp.). Azaleas were sampled from specimens in the first author's home landscape (late winter fertilization with a 10N–4.4P–6.6K
Abstract
Glyphosate [41% a.i. isopropylamine salt of N-(phosphonomethyl) glycine] at 0, 50, 75, 100, 150, and 200 mg·liter-1 was sprayed on mature lemon and tangerine trees to control a heavy infestation of eastern dodder (Cuscuta monogyna Vahl.). All concentrations completely eliminated the weed from the tree canopies. At the higher concentrations, the herbicide appeared to slightly reduce leaf size, cause some minor fruit deformation, and increase the number of abnormal shoots.
Abstract
The time required to degreen Florida ‘Bearss’ lemons can be greatly reduced by the use of 1 to 10 ppm ethylene at 25 or 30°C. Degreening was accomplished in 2 to 3 days instead of the 2 to 3 weeks required with the current commercial practice of cool coloring at 15° without ethylene. Applications of a benzimidazole fungicide (thiabendazole, benomyl) prior to degreening adequately controlled decay. Rapid degreening with ethylene at higher temperatures (25° or 30°) eliminates the need for cool coloring storage and brings lemon availability more nearly in phase with consumer demand.
. Amoroso, M.G. Blaiotta, G. Bianco, M. 2004 Inter-simple sequence repeat markers and flow cytometry for the characterization of closely related Citrus limon germplasm Biotechnol. Lett. 26 1296 1299 Coletta
Two lemon (Citrus × limon L. Burm. F.) cultivars, Eureka and Villafranca, were subjected to a mutation-inducing process, which led to the production of seedless mutants in both cultivars. This mutation-inducing process did not affect many other lemon traits.
Abstract
Seal-packaging of individual fruits of ‘Shamouti’ and ‘Valencia’ oranges (Citrus sinensis L. Osbeck), grapefruit (C. paradisi Macf cv. Marsh) and lemons (C. limon Burm. f. cv. Eureka) with a film of high-density polyethylene (0.01 mm) markedly delayed their deterioration as measured by peel shrinkage, softening, deformation and loss of flavor. This film was applied to fruit that had received conventional treatments of disinfection with sodium orthophenylphenate and waxing. Sealed fruit maintained their fresh appearance more than twice as long as conventionally handled fruit. Weight loss of fruit was reduced about five-fold. Sealed fruit at 20° were firmer and lost less weight than non-sealed fruit at the lowest optimal temperature. Sealing various citrus fruits in high density polyethylene reduced both their respiratory activity and ethylene production. CO2 and O2 content in the internal atmosphere of the sealed and control fruit were similar but ethylene content was lower in the sealed fruit.
flooding of ‘Verna’ lemon trees on SO rootstock relative to trees that were interstocked with two different orange varieties. Materials and Methods Trees and growth condition. Two-year-old ‘Verna’ lemon trees [ Citrus limon (L.) Burm.] grafted on SO ( C
Abstract
Mature lemon trees (Citrus limon (L.) Burm. f.) were subjected to a long period of severe water stress. Free proline accumulated in leaves of water stressed trees, and returned to normal soon after irrigation was resumed. There was a linear relationship between free proline contents and noon xylem pressure potential.