Petunia supercal light yellow seeds4/4/2023 Based on this, we hypothesized that the ratio of blue light reflectance to that of the combined blue, green, and red wavebands will decrease under N stress in plants. Therefore, it is possible that the reflectance of blue light is relatively less (or absorption is relatively more) than other wavelengths under N stress, as blue light can be absorbed by carotenoids in addition to chlorophyll. Furthermore, the xanthophyll (a carotenoid) pool can increase in response to N stress in plants. It is well known that carotenoids in addition to chlorophyll affect blue light absorption, while mainly chlorophyll absorbs red light. However, there is limited research that has tested or developed smartphone- based applications for assessing N stress in plants. ![]() Nitrogen stress assessments made using smartphones can be highly valuable as these devices are universally available and simple to use. The images can be captured, processed, and N stress index measured in real-time using smartphones, similar to other remote sensing platforms. With advancements in cloud computing, software can be developed and made accessible on smartphones with network connectivity. From this, it is possible to develop indices for N stress in plants. Thus, the images captured by smartphones can be processed to measure reflectance in the blue, green, and red wavebands. Color images captured by a smartphone can be separated into blue, green, and red channels. Smartphones can capture high quality images of plants. Some of the reasons for this include high equipment cost, complicated hardware and software, and the selective nature of developed applications. Although these platforms and indices are available, they are not widely used in academic research and industry. Several indices for N stress have been developed using reflectance in the red, blue, green, red-edge, and near infrared regions of the light spectrum. Using this technique, hyper-spectral and multi-spectral imaging platforms are being developed for N stress assessments in plants. The index response was further validated in strawberry and hydrangea plants, with contrasting plant architecture and N requirement than petunia. Our results further indicate that index decreased in the NS treatment due to increase in reflectance of red and green (or yellow) wavelengths, thus it is likely related to loss of chlorophyll in plants. Further, the index was related to photosynthesis based on the path analysis of several physiological traits. ![]() Our results indicated that the index was specific to NS and decreased with increasing stress exposure in plants. The index is calculated as the ratio of blue reflectance to the combined reflectance of blue, green, and red wavelengths. The index can be measured in real time by capturing images and processing them on a smartphone with network connectivity. In this study, a smartphone-based index was developed for detecting NS in plants. Methods to detect NS in plants are either time-consuming (e.g., laboratory analysis) or require expensive equipment (e.g., a chlorophyll meter). For profits in crop production, it is important to ensure that plants are not subjected to nitrogen stress (NS).
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |