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385 results for “Shading”

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dryad36/100

Original data for for intercropped maize experiments, root barrier experiments in intercropped maize, and unilateral shading experiments

Intercropping improves resource utilization and yield; however, shading causes a decline in yield. Under wide-narrow-row maize-soybean intercropping, maize plants are subjected to weak unilateral illumination and exhibit high photosynthetic performance. However, the mechanism regulating photosynthesis under unilateral weak light remains unknown. Therefore, we conducted an experiment with different planting configurations and two controlled environments to investigate photosynthesis, sugar metabolism, and photosynthate allocation in unshaded and shaded leaves under weak light. All three experiments detected an increase in the net photosynthetic rate (Pn) of unshaded leaves on one side with an increase in the level of shade on the other side leaves. On the contrary, the concentration of sucrose and starch and the number of starch granules in the unshaded leaves decreased with increased shading due to the transfer of abundant 13C into the grains. However, sink loss with ear removal reduced the Pn of unshaded leaves, limiting their ability to transport sugar. Detailed analysis showed that intense unilateral shade (40% to 20% normal light) reduced grain yield (37.6% to 54.4%) but not mild unilateral shade (60% normal light). We further found that in unshaded leaves, Agpsl, Bmy, and Mexl-like significantly influenced sucrose and starch metabolism, while Sweet13a and Sut1 were crucial for sugar export. Sps1, Agpsl, and Sweet13c were crucial for sugar metabolism and export in shaded leaves. Thus, our study confirmed that under unilateral illumination, unshaded leaves, which transported photosynthates to the ear, contributed significantly to the grain filling and reduced sugar concentration, resulting in a higher photosynthetic performance, while the shaded leaves synthesized fewer photosynthates, primarily for their growth and development. We, therefore, propose a narrow-row spacing (40 cm) that provides appropriate unilateral shade (60% normal light) and limits yield reduction in a wide-narrow-row intercropping system.

opencc-zeroSep 2023View details →

dryad36/100

Nesting activity of Olive ridley and effect of artificial shade at Cascajilloso Beach, a new inhabited nesting site in Pacific Panama

Sea turtle nesting activity on newly monitored beaches yields important data to support future regional and global conservation assessments. Here we report on nesting activity of Olive Ridley (Lepidochelys olivacea) at Cascajilloso Beach in Pacific Panama based on data from a new hatchery during seasons 2019, 2020 and 2021. Besides, we conducted a field experiment analyzing the effects of artificial shading on hatchlings' biometric characteristics, hatching success and the incubation period. Nesting activity based on number of egg clutches transferred to the hatchery reached a peak between September (33%) and October (25%). Curved carapace length (CCL) of nesting females (64.3–66.2 cm) was similar to other populations of the Eastern Tropical Pacific (ETP). The number of egg clutches was 80 in 2019, 74 in 2020 and 108 in 2021, however, the clutch size was slightly smaller (91.5 to 94.5 eggs) compared with other populations of the ETP. This could be a phenotypic variation of nesting females at this beach. The ability to move egg clutches to the hatchery was affected during 2020 season due to COVID-19 restrictions. Heavy rainfall during the incubation period influenced the nest temperatures registered under artificial shade and unshaded treatments (maximum average 29.9 °C), potentially resulting in males. The warmer temperatures in our experimental nests produced heavier hatchlings contrary to general assumptions, but this was also related to straight carapace length only after a threshold value of 40 mm. Hatchlings under the artificial shade were able to grow to a certain size but potentially at the cost of storing less mass (trade-off). The ongoing beach patrolling and hatchery management techniques with long-term baseline data collection are needed to secure the nesting population of L. olivacea at this recently surveyed beach.

opencc-zeroOct 2023View details →

zenodo36/100

Handel reverse painted glass lamp shade

Anyone need a lamp shade? 20th Century. Signed J Bailey, Handel, and numbered 737. Shade Diameter 17 1/2. Source: Objaverse 1.0 / Sketchfab

opencc-byAug 2021View details →

ClinicalTrials.gov36/100

Validation of SHADE a Mobile Technology for Monitoring of Ultraviolet Exposure

ClinicalTrials.gov study NCT03315286. IPD Sharing: YES. Countries: 1. Publications: 1.

controlledIPD-YESFeb 2026View details →

dryad36/100