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Showing 1 to 20 of 65 for “"Anthesis"”.
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The physiological effects of heat stress on anthesis and pollination in domesticated sunflowers (Helianthus annuus L.)
Anthesis and pollination are precisely timed events, which change with the surrounding environment depending on light, temperature, and humidity. Plants and pollinators may exhibit mismatched behaviors as a result of temperature changes, and relatively little information exists about how heat …
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Influence of hormonal chemicals and genotypes on fruit growth of Lycopersicon esculentum Mill
… and 'Red Cherry' significantly delayed anthesis of 'Fireball', but not 'Red Cherry'. Ovary diameter at anthesis, final fruit diameter, and fruit weight of both cultivars were unaffected. Irrespective of treatments, a significant positive correlation was obtained between ovary diameter at …
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Effect of Foliar Applications of Urea on the Physiology and Productivity of Maize
… NPKS solution at 7 days before or 12 days after anthesis to provide a total of 11.7, 3.7, 3.7, 0.5 kg ha('-1) of N, P, K and S, respectively. In 1982, three maize hybrids (P3382, B73xMo17, FS854) were sprayed with urea solutions (two separate but equal applications) at 12 and 6 days before …
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COMPARATIVE BIOCHEMICAL AND GENETIC STUDIES OF TESTA DEVELOPMENT IN NORMAL AND HULL-LESS PHENOTYPES OF PUMPKIN (CUCURBITA PEPO L)
… dramatically between 10 to 20 days post-anthesis and then declined steadily until seeds reached maturity. Structural compositional analysis revealed marked reductions in lignin (78%) and cellulose (50%) in hull-less compared with normal phenotypes; whereas no differences in non-cellulosic …
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The Floral Biology of Nymphaea Odorata Aiton
… Aiton native to central Texas has been studied. Anthesis occurs over a three day period with flowers opening each morning. First day flowers are protogynous and the pollen-receptive stigmas secrete a fluid which fills the perigynous cup. Pollen covered insects, especially Hymenoptera …
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Carbohydrates in Glycine max (L.) Merr. fruits during early ontogeny
… fruits of 'Essex' soybeans were determined at anthesis and continuing 10 days after flowering (DAF). The embryo was shown to be filled with starch grains which disappeared with development. Digestion of embryo sections with a mixture of α- and β-amylases showed a rapid hydrolysis of the reserve …
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Evaluating Fungicide Timing for Leaf Spot Diseases of Wheat and Fungicide Resistance in Pyrenophora tritici-repentis
… to apply fungicide to control FHB is during anthesis (ZGS60). It is also possible for pathogen species to become insensitive to fungicides over time if they are frequently exposed to the same class of fungicide, especially site specific fungicides such as quinone outside inhibititors (QoI) …
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Divergent Phenotypic Recurrent Selection for Nitrate Reductase Activity and Correlated Responses in Maize
Divergent phenotype recurrent selection for post anthesis nitrate reductase activity (NRA) in maize was conducted through three cycles. The original material (C(,0)) was the maize (Zea mays L.) synthetic, Super Stiff Stalk Synthetic. The primary objectives were to determine: the selection response …
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Investigating Nectar Rhythms in Squash (<em>Cucurbita pepo</em>): Effects on Honey Bee (<em>Apis mellifera</em>) Foraging Behavior.
… and variable watering regimes. Throughout anthesis, nectar volume and sugar concentration were recorded. In the field, the temporal distribution of arrivals to squash was observed with and without blossoms present. In the greenhouse and in the field, squash flowers exhibit a consistent diel …
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Evaluation of Methods for Early Growth Stage Identification of Corn Genotypes With Stalk Lodging and Rot Resistance
… corn (Zea mays L.) stalk quality made at or near anthesis were examined during three years to determine if any were effective in predicting susceptibility to stalk lodging. Stalk measurements were made on eight single-cross hybrids at Urbana, IL while lodging data was collected from the same …
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The reproductive biology of Clematis addisonii
… phase. The secretion of nectar from the onset of anthesis enhances the probability that outcrossing will occur prior to the presence of self-pollen in flowers. These findings suggest that, in spite of self-compatibility, populations of <i>Clematis addisonii</i> are capable of maintaining high …
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Genetic and Environmental Responses of Harvest Index and Other Agronomic Traits in Winter Wheat (Triticum Aestivum L.) and Spring Oats (Avena Sativa L.)
… nitrogen concentrations of the foliage at anthesis were also examined. Application of supplemental nitrogen increased grain, grain protein, and dry matter yields in 1980 but had no positive effect in 1979 due to a severe drought condition. Nitrogen harvest index and harvest index were not …
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Transgenic Insecticidal Corn and Coleomegilla Maculata
… we observed that coccinellids respond to anthesis by increasing oviposition rates. Also, the majority of the guts of C. maculata larvae and adults collected from the field during anthesis contained corn pollen. In contrast, the adults and larvae of H. axyridis were more predatory than …
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The pollination biology of Haskap (Lonicera caerulea L.: Caprifoliaceae): floral traits and pollinator performance of a new Saskatchewan fruit crop.
… addition to pollinator performance, I describe anthesis length, nectar and pollen dynamics, and stigma receptivity in Haskap flowers. I observed that un-pollinated flowers bloomed for 3-4 days, but pollination triggered early senescence. Nectar was present at the onset of anthesis and did not …
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Phenology, canopy development, biomass and grain yield of annual canarygrass (Phalaris canariensis L.)
… initiation, terminal spikelet formation and anthesis. The length of the pre-anthesis phases with later SDs was altered differentially among canaryseed cultivars but only slightly in wheat and oat. The start of stem elongation in canaryseed was positively associated with FLN, it was negatively …
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The ecology of rodent pollination in Liparia parva (Fabaceae)
… flowers, copious sucrose rich nectar, nocturnal anthesis and nectar production and a musky odour. The Fynbos endemic, Liparia parva (Fabaceae) has been recognised to exhibit several of these traits. Based on this observation, field studies were carried out on the Cape Peninsula, South Africa, to …
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Barley growth, physiology, and forage quality as influenced by defoliation and water stress
… and dry matter (DM) in plant parts, delayed anthesis, and shortened the grain filling period. In the greenhouse, defoliation reduced DM of 'Acsad 176', 'Barlis 628', 'Asni' and 'Tamallalt' by 30, 40, 18 and 30%, respectively, relative to plants that were not defoliated. In the field, however, …
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Testing Reintroduction Potential of Abronia macrocarpa (Nyctaginaceae)
… all stages of development (seedling, juvenile, anthesis) were observed at experimental property 2, but plants remained in the seedling stage at experimental properties 1 and 3. The levels of nitrate and potassium were higher at experimental property 2. This higher level of soil nutrients may be …
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The Effect of Split Nitrogen Fertilization on Yield, Quality, and Nitrogen Use Efficiency of Spring Barley Grown on Two Different Soil Types in Iceland
… at sowing, early booting, and/or late anthesis with different N rates for each application. Splitting N did not increase grain yield compared to a single application at sowing, but high N doses at sowing tended to increase grain yield. The effect of soil type was greater on yield and …
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Evaluation of injury and management strategies for stink bugs (Heteroptera: Pentatomidae) on cotton, Gossypium hirsutum L.
… 350, „T 550, and 101 to „T 600 heat units beyond anthesis, respectively. In free-choice tests, boll preference was evaluated during each of the initial five weeks of flowering. Boll density increased from 5.1 to 6.6-fold from week one to week five. There was a corresponding 4.6 to 6.2-fold …
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