scholarly journals Effects of Light and Autotoxicity on the Reproduction of Bidens pilosa L.: From Laboratory to the Field

Agriculture ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 555
Author(s):  
Ming-Tung Hsueh ◽  
Chihhao Fan ◽  
Hsiao-Feng Lo ◽  
Wen-Lian Chang
Keyword(s):  
Red Light ◽  
Agricultural Practices ◽  
Light Treatment ◽  
Bidens Pilosa ◽  
Light Requirement ◽  
Dark Treatment ◽  
Good Agricultural Practices ◽  
Seed Reproduction ◽  
Pot Experiments ◽  
Application Rates

In Taiwan, the good agricultural practices for Bidens pilosa L. (Cobbler’s pegs) had been established due to its pharmacology application. However, the reproduction of this species that may cause phytotoxicity to the subsequent crops has not been investigated extensively. We hypothesized that both the phytotoxicity and canopy shading conditions that were altered by agricultural practices might affect its seed reproduction. Three experiments from laboratory, pot and field were conducted under different light treatments and residue application rates to evaluate the light requirement and phytotoxicity on the germination of Cobbler’s pegs. The results showed that the germination in the laboratory, dark treatments was higher than that of light treatment while it was inhibited in the darkness in the pot experiments (24% of the light treatments). Moreover, some seeds in the pot experiments germinated in the far-red light (FR) pretreated dark treatments. This observation indicated that the germination response of the investigated plant might be a very low fluence response (VLFR). Results also showed that the autotoxicity enhanced the germination reduction in the FR pretreated dark treatment while increasing the residues buried in the field. Accordingly, both autotoxicity and canopy shading may inhibit the reproduction of Cobbler’s pegs, but the application method needs further study.

Response of Cacao Seedlings to Fertilizer

2018 ◽  
Vol 102 (4) ◽  
pp. 20-23
Author(s):  
Thomas Oberthür ◽  
Marianne Samson ◽  
Noel Janetski ◽  
Kate Janetski ◽  
Myles Fisher
Keyword(s):  
Seedling Growth ◽  
Agricultural Practices ◽  
Fertilizer Application ◽  
Nutrient Concentrations ◽  
Agronomic Performance ◽  
Good Agricultural Practices ◽  
Application Rates

Researchers combined a suite of good agricultural practices with fertilizer application. Modest amounts of fertilizer applied to cacao seedlings in the nursery increased seedling growth and nutrient concentrations. There were no significant responses if fertilizer application rates were doubled. Results find it likely that adequate and well-timed supplies of fertilizer nutrients in the nursery will translate into better long-term agronomic performance in farmers’ fields.

Food Safety on the Farm: Good Agricultural Practices and Good Handling Practices – Packing Operation Sanitation

EDIS ◽  
2017 ◽  
Vol 2017 (6) ◽  
Author(s):  
Jesscia A. Lepper ◽  
Aswathy Sreedharan ◽  
Renée Goodrich Schneider ◽  
Keith R. Schneider
Keyword(s):  
Food Safety ◽  
Fruits And Vegetables ◽  
Agricultural Practices ◽  
Good Agricultural Practices ◽  
Produce Safety ◽  
Foreign Countries ◽  
Safety Rule ◽  
Handling Practices ◽  
Voluntary Program ◽  
Federal Guidelines

Good agricultural practices (GAPs) and good handling practices (GHPs) encompass the general procedures that growers, packers and processors of fresh fruits and vegetables should follow to ensure the safety of their product. GAPs usually deal with preharvest practices (i.e., in the field), while GHPs cover postharvest practices, including packing, storage and shipping. This factsheet covers GAPs relating to packing operation sanitation. There are seven other Florida Cooperative Extension factsheets in the ‘Food Safety on the Farm’ series that focus on specific aspects of the GAPs program and how they relate to Florida crops and practices. Under the new Food Safety Modernization Act (FSMA), GAPs are a foundation of the Produce Safety Rule (PSR). Other than for round tomatoes in Florida (T-GAPs regulation), GAPs have mainly been a voluntary program. Additionally the PSR mandates all non-exempt operations to follow these new FSMA federal guidelines (6), but all exempt commodities and for those producers exporting to foreign countries, GAPs may still be required. Both the mandatory PSR and GAPs aim to reduce the foodborne illness burden associated with produce.

scholarly journals Single Wavelengths of LED Light Supplement Promote the Biosynthesis of Major Cyclic Monoterpenes in Japanese Mint

Plants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1420
Author(s):  
Takahiro Ueda ◽  
Miki Murata ◽  
Ken Yokawa
Keyword(s):  
Blue Light ◽  
Solid Phase ◽  
Glandular Trichomes ◽  
Red Light ◽  
Glandular Trichome ◽  
Pulse Amplitude ◽  
Light Treatment ◽  
Led Light ◽  
Trichome Formation ◽  
Japanese Mint

Environmental light conditions influence the biosynthesis of monoterpenes in the mint plant. Cyclic terpenes, such as menthol, menthone, pulegone, and menthofuran, are major odor components synthesized in mint leaves. However, it is unclear how light for cultivation affects the contents of these compounds. Artificial lighting using light-emitting diodes (LEDs) for plant cultivation has the advantage of preferential wavelength control. Here, we monitored monoterpene contents in hydroponically cultivated Japanese mint leaves under blue, red, or far-red wavelengths of LED light supplements. Volatile cyclic monoterpenes, pulegone, menthone, menthol, and menthofuran were quantified using the head-space solid phase microextraction method. As a result, all light wavelengths promoted the biosynthesis of the compounds. Remarkably, two weeks of blue-light supplement increased all compounds: pulegone (362% increase compared to the control), menthofuran (285%), menthone (223%), and menthol (389%). Red light slightly promoted pulegone (256%), menthofuran (178%), and menthol (197%). Interestingly, the accumulation of menthone (229%) or menthofuran (339%) was observed with far-red light treatment. The quantification of glandular trichomes density revealed that no increase under light supplement was confirmed. Blue light treatment even suppressed the glandular trichome formation. No promotion of photosynthesis was observed by pulse-amplitude-modulation (PAM) fluorometry. The present result indicates that light supplements directly promoted the biosynthetic pathways of cyclic monoterpenes.

737 Prediction of drop out in an adjunctive light treatment trial in patients with non-seasonal depression and evening chronotype

SLEEP ◽  
2021 ◽  
Vol 44 (Supplement_2) ◽  
pp. A287-A288
Author(s):  
Joey W Chan ◽  
Y K Wing ◽  
S P Lam ◽  
Shirley Xin Li ◽  
J Zhang
Keyword(s):  
Clinical Characteristics ◽  
Red Light ◽  
Bright Light ◽  
Fold Increase ◽  
Light Therapy ◽  
Light Treatment ◽  
Drop Out ◽  
Sleep Diary ◽  
Significant Difference ◽  
Seasonal Depression

Abstract Introduction Drop out during treatment hampers therapeutic effect of interventions. The current study examines the possible predictors of drop out during the five-week light treatment in patients with unipolar non-seasonal depression and evening-chronotype. Methods Baseline characteristics including demographics, sleep diary parameters, light treatment prescribed, and early clinical outcomes changes were compared between the Drop out and Non drop out group. Logistic regression analysis was used to examine predictors for drop out. All data were analyzed in a modified intention to treat analysis with last observation carried forward approach. Results A total of 91 subjects (Female 79%, 46.3 ± 11.8 years old) were included in the analysis. There was no significant difference in the baseline demographic and clinical characteristics between the Drop out and Non drop out group. There was also no significant difference in the improvement of clinical parameters over the first week among the two groups. However, treatment non-adherence (in terms of compliance of less than 80% of prescribed duration) over the first treatment week predicts a five-fold increase in risk of drop out during light therapy. (OR: 5.85, CI: 1.414–24.205, p=0.015) after controlling for potential confounders including age, gender, treatment group, patient expectation, and treatment-emergent adverse events. Conclusion This study found that baseline clinical characteristics including depression severity and improvement of depressive symptoms in the initial week did not differ between the Drop out and Non drop out group. The drop out was also not affected by the type of light (dim red versus bright red light), indirectly supporting dim red light as a valid placebo in bright light therapy trial. Treatment adherence is the early phase of light treatment is an important predictor of drop out. Support (if any):

scholarly journals Implementation study of Good Agricultural Practices (GAP) of Red Fruit (Pandanus conoideus Lamk.)

2021 ◽  
Vol 883 (1) ◽  
pp. 012047
Author(s):  
M H Makaruku ◽  
A Y Wattimena ◽  
A S Mahulette ◽  
E Kembauw
Keyword(s):  
Random Sampling ◽  
Sampling Method ◽  
Agricultural Practices ◽  
Land Ownership ◽  
Survey Method ◽  
Implementation Study ◽  
Good Agricultural Practices ◽  
Post Harvest ◽  
Plant Cultivation ◽  
Fruit Plants

Abstract This study aims to determine and analyze the GAP components that have implemented by red fruit farmers. The method used in the study was a survey method of plant cultivation. The multistage random sampling method used to taking sampling sampling. The area selected for the study area uses the land ownership startification. Each village was randomly sampled as many as 10 farmers, the total number of which was 30 sampled farmers. The results showed that the farmers in the Taniwel District had not fully implemented the GAP guidelines in the cultivation of red fruit plants which included seeding methods, maintenance and post-harvest processing. This is due to the absence of outreach or counseling from the relevant Dinas regarding the GAP guidelines for red fruit plants.

scholarly journals Microbiological Hazard Analysis on Perilla Leaf Farms at the Harvesting Stage for the Application of the Good Agricultural Practices(GAP)

2012 ◽  
Vol 27 (3) ◽  
pp. 295-300 ◽  
Author(s):  
Woo-Hyun Kwon ◽  
Won-Gyeong Lee ◽  
Jeong-Eon Song ◽  
Kyeong-Yeol Kim ◽  
Won-Bo Shim ◽  
...  
Keyword(s):  
Hazard Analysis ◽  
Agricultural Practices ◽  
Good Agricultural Practices ◽  
Harvesting Stage

scholarly journals Food Safety on the Farm: Good Agricultural Practices and Good Handling Practices – Transportation

EDIS ◽  
2019 ◽  
Vol 2019 (2) ◽  
Author(s):  
Christopher R. Pabst ◽  
Jaysankar De ◽  
Alina Balaguero ◽  
Jessica Lepper ◽  
Renee M. Goodrich Schneider ◽  
...  
Keyword(s):  
Food Safety ◽  
Fruits And Vegetables ◽  
Agricultural Practices ◽  
Human Nutrition ◽  
Food Science ◽  
Good Agricultural Practices ◽  
Fact Sheet ◽  
Major Revision ◽  
Handling Practices

Good agricultural practices (GAPs) and good handling practices (GHPs) encompass the general procedures growers, packers, and processors of fresh fruits and vegetables should follow to ensure the safety of their product. GAPs usually address preharvest practices (i.e., in the field), while GHPs cover postharvest practices, including packing and shipping. This 3-page fact sheet covers the GAPs of transporting crops. This major revision is a part of the Food Safety on the Farm series and was written by Christopher R. Pabst, Jaysankar De, Alina Balaguero, Jessica Lepper, Renée Goodrich-Schneider, and Keith R. Schneider and published by the UF/IFAS Food Science and Human Nutrition Department. http://edis.ifas.ufl.edu/fs151

scholarly journals Strategy in Developing Good Agricultural Practices (GAP) in Bangka Regency, of Bangka Belitung Island Province

2017 ◽  
Vol 22 (2) ◽  
pp. 133-139 ◽  
Author(s):  
Fournita Agustina ◽  
◽  
Imron Zahri ◽  
Muhammad Yazid ◽  
. Yunita ◽  
...  
Keyword(s):  
Agricultural Practices ◽  
Good Agricultural Practices

Is the in vivo Photosystem I Function Resistant to Photoinhibition? An Answer from Photoacoustic and Far-Red Absorbance Measurements in Intact Leaves

1991 ◽  
Vol 46 (11-12) ◽  
pp. 1038-1044 ◽  
Author(s):  
Michel Havaux ◽  
Murielle Eyletters
Keyword(s):  
Light Stress ◽  
Red Light ◽  
Light Treatment ◽  
High Light ◽  
Saturation Curve ◽  
Strong Light ◽  
Ps Ii ◽  
Fluorescence Measurements ◽  
Ps I

Abstract Preillumination of intact pea leaves with a strong blue-green light of 400 W m-2 markedly inhibited both photoacoustically monitored O2-evolution activity and PS II photochemistry as estimated from chlorophyll fluorescence measurements. The aim of the present work was to examine, with the help of the photoacoustic technique, whether this high-light treatment deteriorated the in vivo PS I function too. High-frequency photoacoustic measurements indicated that photochemical conversion of far-red light energy in PS I was preserved (and even transiently stimulated) whereas photochemical energy storage monitored in light exciting both PS I and PS II was markedly diminished. Low-frequency photoacoustic measurements of the Emerson enhancement showed a spectacular change in the PS II/PS I activity balance in favor of PS I. It was also observed that the linear portion of the saturation curve of the far-red light effect in the Emerson enhancement was not changed by the light treatment. Those results lead to the conclusion that, in contrast to PS II, the in vivo PS I photofunctioning was resistant to strong light stress, thus confirming previous suggestions derived from in vitro studies. Estimation of the redox state of the PS I reaction center by leaf absorbance measurements at ca. 820 nm suggested that, under steady illumination, a considerably larger fraction of PS I centers were in the closed state in high-light pretreated leaves as compared to control leaves, presumably allowing passive adjustment of the macroscopic quantum yield of PS I photochemis­ try to the strongly reduced photochemical efficiency of photoinhibited PS II.

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