The Experts below are selected from a list of 10938 Experts worldwide ranked by ideXlab platform
Elizabeth C Stryjewski - One of the best experts on this subject based on the ideXlab platform.
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anatomical features of pepper Plants capsicum annuum l grown under red light emitting diodes supplemented with blue or far red light
1997Co-Authors: Andrew C Schuerger, Christopher S Brown, Elizabeth C StryjewskiAbstract:Pepper Plants (Capsicum annuum L. cv., Hungarian Wax) were grown under metal halide (MH) lamps or light-emitting diode (LED) arrays with different spectra to determine the effects of light quality on Plant Anatomy of leaves and stems. One LED (660) array supplied 90% red light at 660 nm (25nm band-width at half-peak height) and 1% far-red light between 700-800nm. A second LED (660/735) array supplied 83% red light at 660nm and 17% far-red light at 735nm (25nm band-width at half-peak height). A third LED (660/blue) array supplied 98% red light at 660nm, 1% blue light between 350-550nm, and 1% far-red light between 700-800nm. Control Plants were grown under broad spectrum metal halide lamps. Plants were gron at a mean photon flux (300-800nm) of 330 micromol m-2 s-1 under a 12 h day-night photoperiod. Significant anatomical changes in stem and leaf morphologies were observed in Plants grown under the LED arrays compared to Plants grown under the broad-spectrum MH lamp. Cross-sectional areas of pepper stems, thickness of secondary xylem, numbers of intraxylary phloem bundles in the periphery of stem pith tissues, leaf thickness, numbers of choloplasts per palisade mesophyll cell, and thickness of palisade and spongy mesophyll tissues were greatest in peppers grown under MH lamps, intermediate in Plants grown under the 660/blue LED array, and lowest in peppers grown under the 660 or 660/735 LED arrays. Most anatomical features of pepper stems and leaves were similar among Plants grown under 660 or 660/735 LED arrays. The effects of spectral quality on anatomical changes in stem and leaf tissues of peppers generally correlate to the amount of blue light present in the primary light source.
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anatomical features of pepper Plants capsicum annuum l grown under red light emitting diodes supplemented with blue or far red light
1997Co-Authors: Andrew C Schuerger, Christopher S Brown, Elizabeth C StryjewskiAbstract:Pepper Plants (Capsicum annuum L. cv., Hungarian Wax) were grown under metal halide (MH) lamps or lightemitting diode (LED) arrays with dierent spectra to determine the eects of light quality on Plant Anatomy of leaves and stems. One LED (660) array supplied 99% red light at 660 nm (25 nm band-width at half-peak height) and 1% far-red light between 700‐800 nm. A second LED (660}735) array supplied 83% red light at 660 nm and 17% farred light at 735 nm (25 nm band-width at half-peak height). A third LED (660}blue) array supplied 98% red light at 660 nm, 1% blue light between 350‐550 nm, and 1% far-red light between 700‐800 nm. Control Plants were grown under broad-spectrum metal halide lamps. Plants were grown at a mean photon flux (300‐800 nm) of 330 lmol m’# s’" under a 12 h day-night photoperiod. Significant anatomical changes in stem and leaf morphologies were observed in Plants grown under the LED arrays compared to Plants grown under the broad-spectrum MH lamp. Cross-sectional areas of pepper stems, thickness of secondary xylem, numbers of intraxylary phloem bundles in the periphery of stem pith tissues, leaf thickness, numbers of chloroplasts per palisade mesophyll cell, and thickness of palisade and spongy mesophyll tissues were greatest in peppers grown under MH lamps, intermediate in Plants grown under the 660}blue LED array, and lowest in peppers grown under the 660 or 660}735 LED arrays. Most anatomical features of pepper stems and leaves were similar among Plants grown under 660 or 660}735 LED arrays. The eects of spectral quality on anatomical changes in stem and leaf tissues of peppers generally were correlated to the amount of blue light present in the primary light source. # 1997 Annals of Botany Company
Andrew C Schuerger - One of the best experts on this subject based on the ideXlab platform.
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anatomical features of pepper Plants capsicum annuum l grown under red light emitting diodes supplemented with blue or far red light
1997Co-Authors: Andrew C Schuerger, Christopher S Brown, Elizabeth C StryjewskiAbstract:Pepper Plants (Capsicum annuum L. cv., Hungarian Wax) were grown under metal halide (MH) lamps or light-emitting diode (LED) arrays with different spectra to determine the effects of light quality on Plant Anatomy of leaves and stems. One LED (660) array supplied 90% red light at 660 nm (25nm band-width at half-peak height) and 1% far-red light between 700-800nm. A second LED (660/735) array supplied 83% red light at 660nm and 17% far-red light at 735nm (25nm band-width at half-peak height). A third LED (660/blue) array supplied 98% red light at 660nm, 1% blue light between 350-550nm, and 1% far-red light between 700-800nm. Control Plants were grown under broad spectrum metal halide lamps. Plants were gron at a mean photon flux (300-800nm) of 330 micromol m-2 s-1 under a 12 h day-night photoperiod. Significant anatomical changes in stem and leaf morphologies were observed in Plants grown under the LED arrays compared to Plants grown under the broad-spectrum MH lamp. Cross-sectional areas of pepper stems, thickness of secondary xylem, numbers of intraxylary phloem bundles in the periphery of stem pith tissues, leaf thickness, numbers of choloplasts per palisade mesophyll cell, and thickness of palisade and spongy mesophyll tissues were greatest in peppers grown under MH lamps, intermediate in Plants grown under the 660/blue LED array, and lowest in peppers grown under the 660 or 660/735 LED arrays. Most anatomical features of pepper stems and leaves were similar among Plants grown under 660 or 660/735 LED arrays. The effects of spectral quality on anatomical changes in stem and leaf tissues of peppers generally correlate to the amount of blue light present in the primary light source.
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anatomical features of pepper Plants capsicum annuum l grown under red light emitting diodes supplemented with blue or far red light
1997Co-Authors: Andrew C Schuerger, Christopher S Brown, Elizabeth C StryjewskiAbstract:Pepper Plants (Capsicum annuum L. cv., Hungarian Wax) were grown under metal halide (MH) lamps or lightemitting diode (LED) arrays with dierent spectra to determine the eects of light quality on Plant Anatomy of leaves and stems. One LED (660) array supplied 99% red light at 660 nm (25 nm band-width at half-peak height) and 1% far-red light between 700‐800 nm. A second LED (660}735) array supplied 83% red light at 660 nm and 17% farred light at 735 nm (25 nm band-width at half-peak height). A third LED (660}blue) array supplied 98% red light at 660 nm, 1% blue light between 350‐550 nm, and 1% far-red light between 700‐800 nm. Control Plants were grown under broad-spectrum metal halide lamps. Plants were grown at a mean photon flux (300‐800 nm) of 330 lmol m’# s’" under a 12 h day-night photoperiod. Significant anatomical changes in stem and leaf morphologies were observed in Plants grown under the LED arrays compared to Plants grown under the broad-spectrum MH lamp. Cross-sectional areas of pepper stems, thickness of secondary xylem, numbers of intraxylary phloem bundles in the periphery of stem pith tissues, leaf thickness, numbers of chloroplasts per palisade mesophyll cell, and thickness of palisade and spongy mesophyll tissues were greatest in peppers grown under MH lamps, intermediate in Plants grown under the 660}blue LED array, and lowest in peppers grown under the 660 or 660}735 LED arrays. Most anatomical features of pepper stems and leaves were similar among Plants grown under 660 or 660}735 LED arrays. The eects of spectral quality on anatomical changes in stem and leaf tissues of peppers generally were correlated to the amount of blue light present in the primary light source. # 1997 Annals of Botany Company
Errol Strain - One of the best experts on this subject based on the ideXlab platform.
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baseline survey of the anatomical microbial ecology of an important food Plant solanum lycopersicum tomato
2013Co-Authors: Andrea Ottesen, Antonio Gonzalez Pena, James R White, James B Pettengill, Sarah M Allard, Steven L Rideout, Marcantoine Allard, Thomas Hill, Peter W Evans, Errol StrainAbstract:Research to understand and control microbiological risks associated with the consumption of fresh fruits and vegetables has examined many environments in the farm to fork continuum. An important data gap however, that remains poorly studied is the baseline description of microflora that may be associated with Plant Anatomy either endemically or in response to environmental pressures. Specific anatomical niches of Plants may contribute to persistence of human pathogens in agricultural environments in ways we have yet to describe. Tomatoes have been implicated in outbreaks of Salmonella at least 17 times during the years spanning 1990 to 2010. Our research seeks to provide a baseline description of the tomato microbiome and possibly identify whether or not there is something distinctive about tomatoes or their growing ecology that contributes to persistence of Salmonella in this important food crop. DNA was recovered from washes of epiphytic surfaces of tomato anatomical organs; leaves, stems, roots, flowers and fruits of Solanum lycopersicum (BHN602), grown at a site in close proximity to commercial farms previously implicated in tomato-Salmonella outbreaks. DNA was amplified for targeted 16S and 18S rRNA genes and sheared for shotgun metagenomic sequencing. Amplicons and metagenomes were used to describe “native” bacterial microflora for diverse anatomical parts of Virginia-grown tomatoes. Distinct groupings of microbial communities were associated with different tomato Plant organs and a gradient of compositional similarity could be correlated to the distance of a given Plant part from the soil. Unique bacterial phylotypes (at 95% identity) were associated with fruits and flowers of tomato Plants. These include Microvirga, Pseudomonas, Sphingomonas, Brachybacterium, Rhizobiales, Paracocccus, Chryseomonas and Microbacterium. The most frequently observed bacterial taxa across aerial Plant regions were Pseudomonas and Xanthomonas. Dominant fungal taxa that could be identified to genus with 18S amplicons included Hypocrea, Aureobasidium and Cryptococcus. No definitive presence of Salmonella could be confirmed in any of the Plant samples, although 16S sequences suggested that closely related genera were present on leaves, fruits and roots.
Christopher S Brown - One of the best experts on this subject based on the ideXlab platform.
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anatomical features of pepper Plants capsicum annuum l grown under red light emitting diodes supplemented with blue or far red light
1997Co-Authors: Andrew C Schuerger, Christopher S Brown, Elizabeth C StryjewskiAbstract:Pepper Plants (Capsicum annuum L. cv., Hungarian Wax) were grown under metal halide (MH) lamps or light-emitting diode (LED) arrays with different spectra to determine the effects of light quality on Plant Anatomy of leaves and stems. One LED (660) array supplied 90% red light at 660 nm (25nm band-width at half-peak height) and 1% far-red light between 700-800nm. A second LED (660/735) array supplied 83% red light at 660nm and 17% far-red light at 735nm (25nm band-width at half-peak height). A third LED (660/blue) array supplied 98% red light at 660nm, 1% blue light between 350-550nm, and 1% far-red light between 700-800nm. Control Plants were grown under broad spectrum metal halide lamps. Plants were gron at a mean photon flux (300-800nm) of 330 micromol m-2 s-1 under a 12 h day-night photoperiod. Significant anatomical changes in stem and leaf morphologies were observed in Plants grown under the LED arrays compared to Plants grown under the broad-spectrum MH lamp. Cross-sectional areas of pepper stems, thickness of secondary xylem, numbers of intraxylary phloem bundles in the periphery of stem pith tissues, leaf thickness, numbers of choloplasts per palisade mesophyll cell, and thickness of palisade and spongy mesophyll tissues were greatest in peppers grown under MH lamps, intermediate in Plants grown under the 660/blue LED array, and lowest in peppers grown under the 660 or 660/735 LED arrays. Most anatomical features of pepper stems and leaves were similar among Plants grown under 660 or 660/735 LED arrays. The effects of spectral quality on anatomical changes in stem and leaf tissues of peppers generally correlate to the amount of blue light present in the primary light source.
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anatomical features of pepper Plants capsicum annuum l grown under red light emitting diodes supplemented with blue or far red light
1997Co-Authors: Andrew C Schuerger, Christopher S Brown, Elizabeth C StryjewskiAbstract:Pepper Plants (Capsicum annuum L. cv., Hungarian Wax) were grown under metal halide (MH) lamps or lightemitting diode (LED) arrays with dierent spectra to determine the eects of light quality on Plant Anatomy of leaves and stems. One LED (660) array supplied 99% red light at 660 nm (25 nm band-width at half-peak height) and 1% far-red light between 700‐800 nm. A second LED (660}735) array supplied 83% red light at 660 nm and 17% farred light at 735 nm (25 nm band-width at half-peak height). A third LED (660}blue) array supplied 98% red light at 660 nm, 1% blue light between 350‐550 nm, and 1% far-red light between 700‐800 nm. Control Plants were grown under broad-spectrum metal halide lamps. Plants were grown at a mean photon flux (300‐800 nm) of 330 lmol m’# s’" under a 12 h day-night photoperiod. Significant anatomical changes in stem and leaf morphologies were observed in Plants grown under the LED arrays compared to Plants grown under the broad-spectrum MH lamp. Cross-sectional areas of pepper stems, thickness of secondary xylem, numbers of intraxylary phloem bundles in the periphery of stem pith tissues, leaf thickness, numbers of chloroplasts per palisade mesophyll cell, and thickness of palisade and spongy mesophyll tissues were greatest in peppers grown under MH lamps, intermediate in Plants grown under the 660}blue LED array, and lowest in peppers grown under the 660 or 660}735 LED arrays. Most anatomical features of pepper stems and leaves were similar among Plants grown under 660 or 660}735 LED arrays. The eects of spectral quality on anatomical changes in stem and leaf tissues of peppers generally were correlated to the amount of blue light present in the primary light source. # 1997 Annals of Botany Company
R Poerwanto - One of the best experts on this subject based on the ideXlab platform.
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Trips (Thysanoptera: Thripidae) Pada Bunga Dan Buah Manggis Serta Hubungannya Dengan Kejadian Burik
2013Co-Authors: Fardedi, N Maryana, S Manuwoto, R PoerwantoAbstract:ABSTRAK. Burik merupakan salah satu penyebab rendahnya mutu buah manggis di Indonesia. Saat ini informasi tentang kejadian burik pada buah manggis di Indonesia baik penyebab maupun pengelolaannya masih sangat terbatas. Tujuan penelitian ialah untuk mempelajari burik buah, dinamika populasi trips, dan hubungan populasi trips dengan kejadian burik pada buah manggis. Penelitian tentang asosiasi serangga trips (Thysanoptera: Thripidae) dengan bunga dan buah serta hubungannya dengan kejadian burik pada buah manggis dilaksanakan di Desa Cengal, Kecamatan Leuwiliang, Kabupaten Bogor, Jawa Barat dari bulan Mei 2009 sampai dengan Agustus 2010. Pengamatan laboratorium dilakukan di Laboratorium Biosistematika Serangga dan Laboratorium Anatomi Tumbuhan, Institut Pertanian Bogor. Bagian tanaman yang diamati ialah daun muda, kuncup, bunga mekar sempurna, dan buah umur 1–16 minggu setelah antesis (MSA). Hasil penelitian menunjukkan burik hanya merusak lapisan kutikula dan eksokarp buah manggis. Scirtothrips dorsalis dan Thrips hawaiiensis (Thysanoptera: Thripidae) ditemukan pada daun muda, kuncup, bunga, dan buah manggis. Populasi imago S. dorsalis dan T. hawaiiensis tertinggi ialah 1,15 dan 0,95 indiividu/bunga mekar sempurna, populasi larva tertinggi ditemui pada buah berumur 2 MSA yaitu 8,75 individu. Populasi trips semakin menurun dengan bertambahnya umur buah manggis. Gejala burik paling banyak muncul pada buah umur 2 dan 3 MSA. Terdapat korelasi antara kepadatan populasi trips pada buah umur 2 dan 3 MSA dengan kejadian burik pada buah manggis. Kepadatan trips sebanyak 10,6 inidividu dapat menimbulkan gejala burik pada buah manggis umur 2 MSA. Karena populasi trips dan gejala burik muncul pada awal pertumbuhan buah, tindakan preventif dengan insektisida dapat dilakukan sebelum tanaman manggis memasuki periode berbunga. ABSTRACT. Fardedi, Maryana, N, Manuwoto, S and Poerwanto, R 2012. Thrips (Thysanoptera: Thripidae) in Flower and Fruit of Mangosteen (Garcinia mangostana L.) and the Correlation to Fruit Scars. Scars on mangosteen decreases the quality of this fruit economically. At the moment, information about management and causal factor of the scars on mangosteen in Indonesia are very limited. The aims of this research were to investigate the fruit scars, the population dynamic of thrips, and the correlation to the fruit scars. The association between thrips and mangosteen flowers and fruits as well as the correlation between thrips population to the fruit scars was investigated. The research was conducted at Cengal Village, Bogor District, West Java from May 2009 to August 2010. Laboratory investigation was carried out in Insect Biosystematics Laboratory and Plant Anatomy Laboratory, Bogor Agricultural University. Parts of Plant observed were the shoot, flower bud, opened-flower, and fruit of 1 - 16 weeks after anthesis (WAA). The scars occurred in fruit cuticle and exocarp. There were two species of thrips, Scirtothrips dorsalis and Thrips hawaiiensis, that were found at flower bud, opened- flower, and fruit. The highest larva population of S. dorsalis and T. hawaiiensis imago were 1.15 and 0.95 each flowers, the highest larva population was on 2 WAA fruits (8.75). The population of adults for both species was high in opened-flower. The population of larva was also high on fruit 2 WAA. The population of thrips decreased along with fruit growth. Scars occurred on fruit 2 and 3 WAA. There was a correlation between the abundance of thrips on fruit 2–3 WAA and scars at mangosteen fruits. Trips density 10.6 could cause scars on 2 WAA fruits. Thrips population and the symptoms of scars occurred on the early growth of fruits, therefore to control the trips using insecticide was suggested to be applied before flowering stage.
