Proximal hyperspectral sensing of abiotic stresses in plants

Recent attempts, advances and challenges, as well as future perspectives regarding the application of proximal hyperspectral sensing (where sensors are placed within 10 m above plants, either on land-based platforms or in con-trolled environments) to assess plant abiotic stresses have been critically reviewed. Abiotic stresses, caused by either physical or chemical reasons such as nutrient deficiency, drought, salinity, heavy metals, herbicides, extreme temper-atures, and so on, may be more damaging than biotic stresses (affected by infectious agents such as bacteria, fungi, in-sects, etc.) on crop yields. The proximal hyperspectral sensing provides images at a sub-millimeter spatial resolution for doing an in-depth study of plant physiology and thus offers a global view of the plant's status and allows for monitoring spatio-temporal variations from large geographical areas reliably and economically. The literature update has been based on 362 research papers in this field, published from 2010, most of which are from four years ago and, in our knowledge, it is the first paper that provides a comprehensive review of the applications of the technique for the detection of various types of abiotic stresses in plants.

Automated summary

Recent advances and challenges in using proximal hyperspectral sensing for assessing plant abiotic stresses have been critically reviewed. This technique provides high-resolution images for studying plant physiology and monitoring spatio-temporal variations. The comprehensive review of 362 research papers shows the wide range of applications for detecting different types of abiotic stresses in plants.