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The U.S. Department of Agriculture, Agricultural Research Service, announces the release of onion inbred ‘B8667 A&Band synthetic population ‘Sapporo-Ki (SKI) -1 A&B’. Both of these releases represent a cytoplasmic male-sterile (A) line with its

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exposure to wavelengths in the ultraviolet (UV-A 400–320 nm/UV-B 320–290 nm/UV-C 290–100 nm) range ( Kerr and McElroy, 1993 ). The UV-B wavelengths that contact the earth’s surface are predicted to increase in springtime radiation by 50% to 60% from 2010 to

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Water-soluble vitamins, including AA and B vitamins, are essential compounds for adequate functioning of the human body. They play important roles as coenzymes in a wide variety of metabolic reactions that sustain life ( Kawasaki and Egi, 2000

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et al., 2001 ), pear ( Hiwasa et al., 2003 ), litchi ( Wang et al., 2006a ), and banana ( Wang et al., 2006b ). Expression of ripening-related expansin was induced by ethylene and inhibited by 1-methylcyclopropene, a gaseous ethylene binding inhibitor

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The ultraviolet radiation B region (UV-B, 280–315 nm) is critical for plant growth and development, morphogenesis, adaptive orientation, photosynthesis, and secondary metabolism ( Krizek, 2004 ; Rozema et al., 1997 ; Teramura, 1983 ). In recent

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of squash have been described ( Paris and Nelson Brown, 2005 ) and include D (dark), l-1 (light coloration–1), l-2 (light coloration–2), and B (bicolor). Tadmor et al. (2005) studied the effects of these particular genes in different genetic

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because propagation is difficult ( Nelson, 1976 ; Quamme and Hogue, 1994 ). For example, poor shoot proliferation and insufficient shoot elongation occur with ‘Ottawa 3’ (Ott.3), ‘Malling 9’ (M.9), ‘Malling 26’ (M.26), ‘Budagovsky 9’ (B.9), and ‘P 2

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Abstract

The starch and carotenoid contents of the flesh of mature fruits were compared in 10 B + B + Cucurbita accessions and their near-isogenic BB counterparts. There were significant differences among the accessions with respect to starch, total carotenoid, carotene, and xanthophyll contents. The accessions also responded differently to the substitution of B for B +. The B allele reduced the starch content only in those accessions possessing a high starch content with B + B +. B increased total carotenoids in most of the accessions. Those having the lowest carotenoid content in the presence of B + B + were least affected by substitution of B. C. pepo cv. Fordhook Zucchini, and a breeding line derived from it, showed the greatest increase in carotenoid content after allelic substitution. The possible role of the B allele in plastid development and its use in breeding for increased carotene content in Cucurbita are discussed.

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Previous work in our laboratory demonstrated that B promotes flowering, fruit set, and yield in almond. A positive response of almond tissue B concentration, fruit set, and yield to B application was observed. Positive correlations between tissue B concentration with fruit set or yield were found when B was applied at 0–1.67 kg B/ha. An investigation was undertaken to test whether the time of B application had a significant effect on B concentration and yield in almond. Solubor (20.5% B) was applied at 0.8 and 1.67 kg B/ha during fall (September), winter (December), and spring (February) to `Butte' (pollinizer) and `Mono' (pistil donor). Results show that for most attributes, September application was more effective than spring and winter. `Butte' was more responsive to B application than `Mono'.

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, the role of ethylene in fruitlet abscission is also supported by the presence of genes MdACO1, MdACS5A, and MdACS5B, which are involved in the conversion of S-adenosylmethionine to ethylene. Enzymes 1-aminocyclopropane-1-carboxylate synthase (ACS

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