Caula Beyl - Academia.edu (original) (raw)
Papers by Caula Beyl
Dissertation Abstracts International, B, 1980
Abstract not availabl
Iran Agricultural Research, Sep 23, 1992
... Proliferation of shoots from Tibor embryogenic cultures in response to medium containing 0.2 ... more ... Proliferation of shoots from Tibor embryogenic cultures in response to medium containing 0.2 mg/L NAA and 0.5 mg/L BA (bottom).(From Kelley, RY, AE Zipf, DE Wesenberg, and GC ... Debergh, P., J. Aitken-Christie, D. Cohen, B. Grout, S. von Arnold, R. Zimmerman, and M. Ziv. ...
Agronomy, Feb 16, 2023
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
HortScience
An automated, mechanical oscillatory shaking (AMOS) device was developed and tested for its abili... more An automated, mechanical oscillatory shaking (AMOS) device was developed and tested for its ability to control height of chrysanthemum (Chrysanthemum morifolium Ramat) cvs. May Shoesmith, Yellow Fuji Mefo, Improved Mefo, and Dramatic. The AMOS device permits automatic and uniform administration of shaking stress to a number of plants simultaneously. Shoot height and fresh weight were effectively reduced by shaking treatment consisting of 160 to 220 cycles per minute for 4 minutes daily at 0800 hours with ‘Dramatic’ exhibiting the greatest dwarfing response. The fresh weight of all 4 cultivars was reduced to an equivalent extent by 28 days of this combined vibrational-contact treatment.
Journal of the American Society for Horticultural Science
Elongation growth of Chrysanthemum morifolium Ramat. cv. May Shoesmith was inhibited by daily sha... more Elongation growth of Chrysanthemum morifolium Ramat. cv. May Shoesmith was inhibited by daily shaking with an automated mechanical device. The dwarfing effect was more pronounced if plants were shaken at 0800 than at 1600 or 2400 hours. The longer the duration of stress, the greater the growth inhibition. Thirty seconds to 2 minutes of stress per day were required for significant dwarfing, with saturation of the effect at 4 to 5 minutes. Four-minute treatments 2 to 4 times daily maximized the stress response. Node number, fresh weight, and dry weight were reduced by shaking, but dry-to-fresh weight ratio was increased. Reciprocity applied to the stress responses in that one 4-minute stress per day had the same growth-retarding effect as four 1-minute stresses. Shaking did not significantly affect flower bud initiation, flower size, or floral keeping quality.
Journal of the American Society for Horticultural Science
Growth in stem length, shoot fresh weight, and leaf surface area of sunflower (Helianthus annuus ... more Growth in stem length, shoot fresh weight, and leaf surface area of sunflower (Helianthus annuus L.) plants was inhibited by periodic shaking (seismo-stress) or rubbing (thigmo-stress), and by drought-stress treatments. Mechanical- and drought-stress treatment of intact plants reduced xylem exudation from detopped plants. This reduction was accompanied by a reduction in root dry weight only in the case of the drought-stress treatment. Exudate from thigmo-stressed plants contained a broad band of extractable inhibitors some of which co-chromatographed with abscisic acid (ABA). ABA-like substances were not detected in exudate from tall or dwarf controls. Enhanced cytokinin (CK)-like substances were detected in exudate collected from seismo-stressed plants. Shoot tip extracts from thigmostressed plants contained no detectable gibberellin (GA)-like substances, whereas those extracts from unstressed controls contained multiple zones of GA-like activity. Extracts of plant parts most distu...
Plant Propagation Concepts and Laboratory Exercises, 2008
Plant Propagation Concepts and Laboratory Exercises, 2008
HortScience, 1996
Soybean, Glycine max (L.) Merril is an annual self-pollinated diploid legume (sub-family Fabaceae... more Soybean, Glycine max (L.) Merril is an annual self-pollinated diploid legume (sub-family Fabaceae). In the 1990s, soybean production in the far east, as in ancient times, was primarily for food consumption. Today, vegetable soybean is the dominant soyfood in Asia and is gaining popularity in the United States because of its versatility and nutrient value. Dozens of different forms of food have been developed from it. Tofu is one of the most important of these. Twenty four cultivars of vegetable soybean from two regional tofu tests (Alabama A&M and Virginia State Univ.) and 10 cultivars from the Alabama A&M Univ. soybean breeding project were evaluated for the physical and chemical characteristic of the resultant tofu. Data on protein, tofu yield, moisture content, tofu texture, and structure were recorded. Shear-force (used to evaluate texture) was determined with a Kramer Shear cell and micro-structure was examined using a scanning electron microscope. Seed protein content ranged f...
… Mathesius U, Journet …, 2006
In recent years rapid procedures for obtaining transgenic roots have been developed using Agrobac... more In recent years rapid procedures for obtaining transgenic roots have been developed using Agrobacterium rhizogenes, a soil pathogen which elicits adventitious, genetically (Ri T-DNA) transformed roots. This leads to the production of so-called composite plants comprising a transgenic ...
HortScience
The antioxidant sodium diethyldithiocarbamate (DDC) was evaluated for use as a protectant of indo... more The antioxidant sodium diethyldithiocarbamate (DDC) was evaluated for use as a protectant of indole-3-acetic acid (IAA) during application onto cellulose thin layer strips as well as during subsequent ascending chromatographic development. An IAA standard of 5 μg, applied directly over a 100 μg pretreatment spot of DDC at the origin, revealed eightfold more auxin activity than did 5 μg of IAA alone as determined by the Avena coleoptile bioassay. However, DDC alone at this dosage produced an inhibitory biological response at the same chromatographic zone where auxin banded in an isopropanol, ammonia, water (10:1:1 by volume) solvent system. Reduction of the DDC dosage to 1 μg spot−1 gave threefold greater net auxin activity than did 100 μg DDC, and 20% better protection than did 0.5 μg DDC, while eliminating its own inhibitory action at this lower dosage level.
Journal of Phytopathology, Aug 1, 2002
Pythium myriotylum is the causal organism of Cocoyam Root Rot Disease (CRRD). Significant numbers... more Pythium myriotylum is the causal organism of Cocoyam Root Rot Disease (CRRD). Significant numbers of zoospores were induced within 1.5 h in cultures in Petri dishes containing P. myriotylum soaked in 0.01 M Ca ++ and sterile deionized distilled water. Soaking solutions # 2 and # 3 inhibited the production of zoospores of P. myriotylum. This may be due to the delay in maturation of sporangia and the release of zoospores when the soaking solutions contain sucrose. Significant necrosis of detached cocoyam plantlet roots in 100 ml beakers confirmed the infection of zoospores of two 'local white' cocoyam genotypes. Detached 'yellow' cocoyam roots in 100 ml beakers of genotype RO3015 resisted infection of P. myriotylum with no necrosis of the inoculated roots, which may indicate resistance. This provides a quick and reliable pathogenicity test of P. myriotylum on susceptible cocoyam detached roots. Necrosis of inoculated detached cocoyam roots could be reliably used to screen cocoyam germplasm for resistance to P. myriotylum.
Journal of Phytopathology, Aug 1, 2007
Knowledge of host defence response in cocoyam against Pythium myriotylum is essential in understa... more Knowledge of host defence response in cocoyam against Pythium myriotylum is essential in understanding disease resistance and the development of effective control measures for the cocoyam root rot disease. Four cocoyam accessions were assessed for root rot disease reaction by inoculating the roots of intact plants in the greenhouse and detached roots in the laboratory with P. myriotylum isolate ‘Mamu’ from Cameroon. Electrolyte leakage in detached infected roots and peroxidase activities and isozyme expressions in crude protein extracts collected from healthy roots of inoculated and non‐inoculated plants at 0, 2, 4, 6 and 8 days post inoculation (dpi) were used independently to assess resistance/tolerance. Based on the results, cocoyam accessions RO1054 and RO3015 were rated tolerant/moderately resistant while accessions RO2063 and ‘Local White’ (LW) were rated susceptible to P. myriotylum isolate ‘Mamu’. The time‐course spectrophotometric analysis of peroxidase activity showed an increase in activity in the roots of the tolerant RO1054, 8 days after inoculation. One peroxidase isoform (Rf 0.66) was induced only in roots of the susceptible inoculated accessions ‘Local White’ and R02063 at 4 and 6 dpi. One acidic peroxidase isozyme (pI 4.5) and one basic isozyme (pI 7.4) were detected only in roots of inoculated plants. Our results suggest that electrolyte leakage in infected roots can be used to assess tolerance/susceptibility in cocoyam and that tolerance to the root rot disease in cocoyam may be associated in part with an increased generation of peroxidase activity in the roots.
Dissertation Abstracts International, B, 1980
Abstract not availabl
Iran Agricultural Research, Sep 23, 1992
... Proliferation of shoots from Tibor embryogenic cultures in response to medium containing 0.2 ... more ... Proliferation of shoots from Tibor embryogenic cultures in response to medium containing 0.2 mg/L NAA and 0.5 mg/L BA (bottom).(From Kelley, RY, AE Zipf, DE Wesenberg, and GC ... Debergh, P., J. Aitken-Christie, D. Cohen, B. Grout, S. von Arnold, R. Zimmerman, and M. Ziv. ...
Agronomy, Feb 16, 2023
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
HortScience
An automated, mechanical oscillatory shaking (AMOS) device was developed and tested for its abili... more An automated, mechanical oscillatory shaking (AMOS) device was developed and tested for its ability to control height of chrysanthemum (Chrysanthemum morifolium Ramat) cvs. May Shoesmith, Yellow Fuji Mefo, Improved Mefo, and Dramatic. The AMOS device permits automatic and uniform administration of shaking stress to a number of plants simultaneously. Shoot height and fresh weight were effectively reduced by shaking treatment consisting of 160 to 220 cycles per minute for 4 minutes daily at 0800 hours with ‘Dramatic’ exhibiting the greatest dwarfing response. The fresh weight of all 4 cultivars was reduced to an equivalent extent by 28 days of this combined vibrational-contact treatment.
Journal of the American Society for Horticultural Science
Elongation growth of Chrysanthemum morifolium Ramat. cv. May Shoesmith was inhibited by daily sha... more Elongation growth of Chrysanthemum morifolium Ramat. cv. May Shoesmith was inhibited by daily shaking with an automated mechanical device. The dwarfing effect was more pronounced if plants were shaken at 0800 than at 1600 or 2400 hours. The longer the duration of stress, the greater the growth inhibition. Thirty seconds to 2 minutes of stress per day were required for significant dwarfing, with saturation of the effect at 4 to 5 minutes. Four-minute treatments 2 to 4 times daily maximized the stress response. Node number, fresh weight, and dry weight were reduced by shaking, but dry-to-fresh weight ratio was increased. Reciprocity applied to the stress responses in that one 4-minute stress per day had the same growth-retarding effect as four 1-minute stresses. Shaking did not significantly affect flower bud initiation, flower size, or floral keeping quality.
Journal of the American Society for Horticultural Science
Growth in stem length, shoot fresh weight, and leaf surface area of sunflower (Helianthus annuus ... more Growth in stem length, shoot fresh weight, and leaf surface area of sunflower (Helianthus annuus L.) plants was inhibited by periodic shaking (seismo-stress) or rubbing (thigmo-stress), and by drought-stress treatments. Mechanical- and drought-stress treatment of intact plants reduced xylem exudation from detopped plants. This reduction was accompanied by a reduction in root dry weight only in the case of the drought-stress treatment. Exudate from thigmo-stressed plants contained a broad band of extractable inhibitors some of which co-chromatographed with abscisic acid (ABA). ABA-like substances were not detected in exudate from tall or dwarf controls. Enhanced cytokinin (CK)-like substances were detected in exudate collected from seismo-stressed plants. Shoot tip extracts from thigmostressed plants contained no detectable gibberellin (GA)-like substances, whereas those extracts from unstressed controls contained multiple zones of GA-like activity. Extracts of plant parts most distu...
Plant Propagation Concepts and Laboratory Exercises, 2008
Plant Propagation Concepts and Laboratory Exercises, 2008
HortScience, 1996
Soybean, Glycine max (L.) Merril is an annual self-pollinated diploid legume (sub-family Fabaceae... more Soybean, Glycine max (L.) Merril is an annual self-pollinated diploid legume (sub-family Fabaceae). In the 1990s, soybean production in the far east, as in ancient times, was primarily for food consumption. Today, vegetable soybean is the dominant soyfood in Asia and is gaining popularity in the United States because of its versatility and nutrient value. Dozens of different forms of food have been developed from it. Tofu is one of the most important of these. Twenty four cultivars of vegetable soybean from two regional tofu tests (Alabama A&M and Virginia State Univ.) and 10 cultivars from the Alabama A&M Univ. soybean breeding project were evaluated for the physical and chemical characteristic of the resultant tofu. Data on protein, tofu yield, moisture content, tofu texture, and structure were recorded. Shear-force (used to evaluate texture) was determined with a Kramer Shear cell and micro-structure was examined using a scanning electron microscope. Seed protein content ranged f...
… Mathesius U, Journet …, 2006
In recent years rapid procedures for obtaining transgenic roots have been developed using Agrobac... more In recent years rapid procedures for obtaining transgenic roots have been developed using Agrobacterium rhizogenes, a soil pathogen which elicits adventitious, genetically (Ri T-DNA) transformed roots. This leads to the production of so-called composite plants comprising a transgenic ...
HortScience
The antioxidant sodium diethyldithiocarbamate (DDC) was evaluated for use as a protectant of indo... more The antioxidant sodium diethyldithiocarbamate (DDC) was evaluated for use as a protectant of indole-3-acetic acid (IAA) during application onto cellulose thin layer strips as well as during subsequent ascending chromatographic development. An IAA standard of 5 μg, applied directly over a 100 μg pretreatment spot of DDC at the origin, revealed eightfold more auxin activity than did 5 μg of IAA alone as determined by the Avena coleoptile bioassay. However, DDC alone at this dosage produced an inhibitory biological response at the same chromatographic zone where auxin banded in an isopropanol, ammonia, water (10:1:1 by volume) solvent system. Reduction of the DDC dosage to 1 μg spot−1 gave threefold greater net auxin activity than did 100 μg DDC, and 20% better protection than did 0.5 μg DDC, while eliminating its own inhibitory action at this lower dosage level.
Journal of Phytopathology, Aug 1, 2002
Pythium myriotylum is the causal organism of Cocoyam Root Rot Disease (CRRD). Significant numbers... more Pythium myriotylum is the causal organism of Cocoyam Root Rot Disease (CRRD). Significant numbers of zoospores were induced within 1.5 h in cultures in Petri dishes containing P. myriotylum soaked in 0.01 M Ca ++ and sterile deionized distilled water. Soaking solutions # 2 and # 3 inhibited the production of zoospores of P. myriotylum. This may be due to the delay in maturation of sporangia and the release of zoospores when the soaking solutions contain sucrose. Significant necrosis of detached cocoyam plantlet roots in 100 ml beakers confirmed the infection of zoospores of two 'local white' cocoyam genotypes. Detached 'yellow' cocoyam roots in 100 ml beakers of genotype RO3015 resisted infection of P. myriotylum with no necrosis of the inoculated roots, which may indicate resistance. This provides a quick and reliable pathogenicity test of P. myriotylum on susceptible cocoyam detached roots. Necrosis of inoculated detached cocoyam roots could be reliably used to screen cocoyam germplasm for resistance to P. myriotylum.
Journal of Phytopathology, Aug 1, 2007
Knowledge of host defence response in cocoyam against Pythium myriotylum is essential in understa... more Knowledge of host defence response in cocoyam against Pythium myriotylum is essential in understanding disease resistance and the development of effective control measures for the cocoyam root rot disease. Four cocoyam accessions were assessed for root rot disease reaction by inoculating the roots of intact plants in the greenhouse and detached roots in the laboratory with P. myriotylum isolate ‘Mamu’ from Cameroon. Electrolyte leakage in detached infected roots and peroxidase activities and isozyme expressions in crude protein extracts collected from healthy roots of inoculated and non‐inoculated plants at 0, 2, 4, 6 and 8 days post inoculation (dpi) were used independently to assess resistance/tolerance. Based on the results, cocoyam accessions RO1054 and RO3015 were rated tolerant/moderately resistant while accessions RO2063 and ‘Local White’ (LW) were rated susceptible to P. myriotylum isolate ‘Mamu’. The time‐course spectrophotometric analysis of peroxidase activity showed an increase in activity in the roots of the tolerant RO1054, 8 days after inoculation. One peroxidase isoform (Rf 0.66) was induced only in roots of the susceptible inoculated accessions ‘Local White’ and R02063 at 4 and 6 dpi. One acidic peroxidase isozyme (pI 4.5) and one basic isozyme (pI 7.4) were detected only in roots of inoculated plants. Our results suggest that electrolyte leakage in infected roots can be used to assess tolerance/susceptibility in cocoyam and that tolerance to the root rot disease in cocoyam may be associated in part with an increased generation of peroxidase activity in the roots.