Effect of certain hydrocarbon oils on the transpiration rate of some deciduous tree fruits / by Victor W. Kelley.

Kelley, Victor W.

doi:10.5962/bhl.title.16668

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…Photosynthesis was appreciably depressed by oil application only when the undersides of leaves were treated. Grape leaves are hy-postomatous (Mullins et al, 1992), and it has been shown repeatedly that application of oils to leaf surfaces with stomata leads to greater leaf penetration as well as more visible injury (Dallyn, 1953;Kelley, 1930a;Rohrbaugh, 1934) and greater depression of transpiration (Kelley, 1930b) and photosynthesis (Dallyn, 1953;Kelley, 1930a;Rohrbaugh, 1934) than application to surfaces without stomata. Several authors have shown that oils of viscosities similar to JMS Stylet-Oil can also slowly penetrate through intact cuticles without stomatal openings (Ginsburg, 1931;Knight et al, 1929;Külps and Hein, 1972), but if penetration through the upper surface took place in our grape leaves, it was not enough to affect photosynthesis.…”

Section: Discussionmentioning

confidence: 99%

Factors Affecting Reductions in Photosynthesis Caused by Applying Horticultural Oil to Grapevine Leaves

Baudoin¹,

McDonald²,

Wolf³

2006

HortSci

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Phytotoxicity of horticultural oil, applied shortly before antifungal sulfur, was evaluated for 23 grape cultivars. Oil application significantly reduced accumulation of soluble solids in berries of 9 of 23 cultivars, but there was no relationship with visible foliar injury. Treatment of leaves of Vitis labrusca `Catawba' with 1.5% JMS Stylet-Oil reduced leaf net photosynthesis (Pn) by 50% to 60% and of Vitis vinifera `Chardonnay' by 20% to 30% 1 day after application. Pn was reduced only when the lower (abaxial) leaf surface was treated; treatment of only the adaxial leaf surface had little effect. The Pn depression in `Catawba' persisted 3 to 4 weeks, whereas reductions in `Chardonnay' persisted less than 2 weeks. The Pn-depressing effect of oil was not significantly ameliorated by real or simulated rainfall, and washing the lower leaf surfaces with water and detergent also had only limited effect. There was no significant difference in Pn depression from oil applications made in the middle of the day (stomata open) compared to application in the evening (stomata closed), or from oil applied at higher versus lower application pressure. The greater sensitivity of `Catawba' than `Chardonnay' to Pn depression by oil may be related to the amount of oil retained by the leaves; the pubescent lower leaf surfaces of `Catawba' retained more than twice as much spray emulsion as did the more glabrous leaves of `Chardonnay'. Visible injury was mild in both cultivars, with small water-soaked lesions developing more commonly on `Chardonnay' than on `Catawba' leaves. Spray oil retention data for additional cultivars suggested that differences in retention can explain a portion of the differences in horticultural oil phytotoxicity.

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Section: Discussionmentioning

confidence: 99%

Factors Affecting Reductions in Photosynthesis Caused by Applying Horticultural Oil to Grapevine Leaves

Baudoin¹,

McDonald²,

Wolf³

2006

HortSci

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“…where V c is the excluded volume measured in comoving distance. We convert luminosity distance limits to comoving distance limits assuming cosmological parameters from Hinshaw et al (2013) using the cosmopy package (Kelley 2022).…”

Section: Smbhb Number Density Limitsmentioning

confidence: 99%

The NANOGrav 15 yr Data Set: Bayesian Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries

Agazie¹,

Anumarlapudi²,

Archibald

et al. 2023

ApJL

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Evidence for a low-frequency stochastic gravitational-wave background has recently been reported based on analyses of pulsar timing array data. The most likely source of such a background is a population of supermassive black hole binaries, the loudest of which may be individually detected in these data sets. Here we present the search for individual supermassive black hole binaries in the NANOGrav 15 yr data set. We introduce several new techniques, which enhance the efficiency and modeling accuracy of the analysis. The search uncovered weak evidence for two candidate signals, one with a gravitational-wave frequency of ∼4 nHz, and another at ∼170 nHz. The significance of the low-frequency candidate was greatly diminished when Hellings–Downs correlations were included in the background model. The high-frequency candidate was discounted due to the lack of a plausible host galaxy, the unlikely astrophysical prior odds of finding such a source, and since most of its support comes from a single pulsar with a commensurate binary period. Finding no compelling evidence for signals from individual binary systems, we place upper limits on the strain amplitude of gravitational waves emitted by such systems. At our most sensitive frequency of 6 nHz, we place a sky-averaged 95% upper limit of 8 × 10−15 on the strain amplitude. We also calculate an exclusion volume and a corresponding effective radius, within which we can rule out the presence of black hole binaries emitting at a given frequency.

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Effects of Atrazine-Phytobland Oil Combinations on¹⁴CO₂-Fixation and Transpiration

Coats

Foy

1974

Weed sci.

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Fixation of14CO2in corn (Zea maysL. ‘VPI 646’ or ‘VPI648′) and transpiration in corn and soybean [Glycine max(L.) Mere. ‘Lee’] following treatment with atrazine [2-chloro-4-(ethylamino)-6-isopropylamine-s-triazine] were reduced by the addition of phytobland petroleum oils to the treatment solutions. Inhibition of14CO2fixation increased with increasing rates of oil and (or) atrazine and decreased with time following treatment. Oil type (naphthenic versus paraffinic) and viscosity (70, 100, 150, and 200 sec) did not significantly affect14CO2fixation or transpiration; however, when applied alone or in combination with atrazine, the 100-sec viscosity oils tended to be the most inhibitory.

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Effect of certain hydrocarbon oils on the transpiration rate of some deciduous tree fruits / by Victor W. Kelley.

Cited by 4 publications

References 3 publications

Factors Affecting Reductions in Photosynthesis Caused by Applying Horticultural Oil to Grapevine Leaves

Factors Affecting Reductions in Photosynthesis Caused by Applying Horticultural Oil to Grapevine Leaves

The NANOGrav 15 yr Data Set: Bayesian Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries

Effects of Atrazine-Phytobland Oil Combinations on¹⁴CO₂-Fixation and Transpiration

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Effect of certain hydrocarbon oils on the transpiration rate of some deciduous tree fruits / by Victor W. Kelley.

Cited by 4 publications

References 3 publications

Factors Affecting Reductions in Photosynthesis Caused by Applying Horticultural Oil to Grapevine Leaves

Factors Affecting Reductions in Photosynthesis Caused by Applying Horticultural Oil to Grapevine Leaves

The NANOGrav 15 yr Data Set: Bayesian Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries

Effects of Atrazine-Phytobland Oil Combinations on14CO2-Fixation and Transpiration

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Effects of Atrazine-Phytobland Oil Combinations on¹⁴CO₂-Fixation and Transpiration