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-disorder symptoms occur in mealy-cup sage and to elucidate threshold nutrient levels. Materials and methods The experiment was conducted in a glass greenhouse in Raleigh, NC, at 35°N latitude. ‘Evolution’ mealy-cup sage plugs (2.7 × 2.7 × 3.6 cm cell size; Raker

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resources ( Davis et al., 2000 ), evolution of increased competitive ability which includes a lag phase or lengthy time period to evolve [evolution of increased competitive ability or (EICA) hypothesis ( Blossey and Notzold, 1995 )], and/or derivation from

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to be 29.3 and 29.2 pg, respectively (determined with flow cytometry). Additional study of cytogenetics of Illicium can clarify various discrepancies and further elucidate chromosome and genome size evolution in this basal angiosperm lineage. After

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valuable material for scientific research on evolution of tree peony cultivars, metabolic pathways of pigments in the floral disc, origin of floral disc in Paeoniaceae, and other issues in evolutionary and developmental genetics. Availability

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morphology of wild Rosa rugosa and discussion on its origin and evolution Scientia Silvae Sinicae 43 76 80 Guo, N. 2010 Genetic diversity of natural populations of Rosa laxa Retz. and Rosa platyacantha Schrenk. Chinese Acad. Agr. Sci., Beijing, China

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A carbaryl spray thinned fruit of the apple (Malus svlvestris (L.) Mill.) cv. Red Rome but did not affect ethylene evolution of fruit or pedicel of ’Red Rome’, ‘Golden Delicious’ or ‘Staymared’. It did increase ethylene evolution of the leaves of the first 2 compared with ‘Staymared’ even though ‘Red Rome’ was the only cultivar thinned by the Sevin spray. Naphthaleneacetic acid (NAA) sprays which caused thinning also increased ethylene evolution of all 3 structures, commencing the second day after application. The increase was greater than that from dipping samples structures in the same solution. Covering branches with black shading cloth reduced ethylene evolution of mature to young apple leaves. Lack of good correlation between thinning, ethylene evolution of different structures, and methods of application make it desirable to develop a better method of screening potential apple thinning materials.

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SMART program ( Schultz et al., 2000 ). Evolution patterns of the BraHAT family. Gene duplication occurring via unequal crossing over, retrotransposition, and whole-genome duplication is an important mechanism for acquiring new genes, which in turn

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Abstract

An effective and simple system for studying ethylene evolution from apple (Malus domestica Borkh.) shoots was devised and used to follow seasonal patterns of ethylene evolution, as well as changes in ethylene evolution following ethephon and shoot bending treatments. Field studies using intact two year wood of spur and non-spur strains of ‘Delicious’ and ‘McIntosh’ showed similarly high levels of ethylene early in the season which subsequently declined. The large differences in ethylene evolution between sampling dates may have been caused by climatic differences at the time of sampling. No differences in ethylene evolution were detected among strains or cultivars although differences in flowering were observed in the following season.

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Abstract

Ethylene evolution was determined for tomato (Lycopersicon esculentum Mill.) plants grown under nutrient-deficient (N, P, K, Ca, Mg, S) conditions or under full nutrition with NH4 + or NO 3 in sand culture. Ethylene evolution increased for plants deficient in K, Ca, or Mg relative to that of plants grown on nutritionally complete solutions with NO 3 . Deficiency of N, P, or S did not stimulate ethylene evolution relative to that detected from plants grown with complete nutrition with NO 3 . Physiological stress from NH4 + nutrition produced enhancements in ethylene evolution that exceeded those due to deficiencies of macronutrients.

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cropping ( Greene, 2002 ). Ethylene induces (stimulates) organ abscission in numerous plants including apple ( Addicott, 1982 ; Arteca, 1995 ; Reid, 1985 ). There is evidence that apple fruitlet abscission may be related to increased ethylene evolution

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