Shading is a key element in the control of light intensity and is usually used during the summer when sunlight is at its most intense. Succulents are ornamental crops that have beextremely popular because of their leaf structure and other characteristics. A study was conducted to determine the effects of shading on the growth and development as well as the anthocyanin content of two Echeveria species: Echeveria agavoides and E. marcus. Three levels of shading were used, namely no shading/full light treatment, partially shaded conditions, and well-shaded conditions, which were achieved by placement inside controlled growing chambers for 4 weeks. The results revealed the bolting of growth in both height and diameter for both species when grown under shaded and partially shaded conditions, which were abnormal compared withthe typical development. CIELAB color results also showed thata* was significantly affected by shading levels, exhibiting a higher positive value for succulents under full light or no shading. These results were consistent with the anthocyanin analysis, where the highest contents were identifiedinthe species grown under full light. The image analysis also confirmed a higher percentage area based on the smart segmentation for red pigments compared withthat for green pigments.

This study was conducted to determine the effects of light intensity on the growth and development as well as the anthocyanin content of two Echeveria species, namely Echeveria agavoides and E. marcus. Three light intensity levels (high, 150 μmol･m-2s-1; intermediate, 75 μmol･m-2s-1; and low, 35 μmol･m-2s-1) served as the treatments, which were replicated four times. The results revealed that the tallest and largest plants were those under low light conditions. It was observed that there was a decline as the light intensity increased, which is attributed to the coping mechanisms of plants to search for light sources, which has a similar effect to bolting or an increase in the node-to-node distance. CIELAB color values of L* and a* for both species were significantly affected by the light intensity, indicating changes in the lightness of hue and green-to-red color pigmentation in plants. These results were strongly reflected in those of the anthocyanin content analysis, where a direct increase in the concentration was observed with increasing light intensity. The results of the anthocyanin analysis were also supported by the histogram, smart segmentation images, as well as the ratio of red and green pigments found in the images. Thus, a high light intensity should be used to increase the quality and provide conducive growing conditions for both succulent species.