Journal article

Simple reflectance indices track heat and water stress-induced changes in steady-state chlorophyll fluorescence at the canopy scale

SZ Dobrowski, JC Pushnik, PJ Zarco-Tejada, SL Ustin

REMOTE SENSING OF ENVIRONMENT | ELSEVIER SCIENCE INC | Published : 2005

Abstract

Non-invasive remote sensing techniques for monitoring plant stress and photosynthetic status have received much attention. The majority of published vegetation indices are not sensitive to rapid changes in plant photosynthetic status brought on by common environmental stressors such as diurnal fluxes in irradiance and heat. This is due to the fact that most vegetation indices have no direct link to photosynthetic functioning beyond their sensitivity to canopy structure and pigment concentration changes. In contrast, this study makes progress on a more direct link between passive reflectance measurements and plant physiological status through an understanding of photochemical quenching (qP) a..

View full abstract

University of Melbourne Researchers