• This study aimed to assess the suitability of selected tropical groundcover plants for extensive green roof architecture, especially by investigating physiological parameters of plants under drought stress.
  • Relative water content (RWC), stomatal opening rate, maximum quantum yield of photosystem II (Fv/Fm), soil humidity, and leaf surface temperature were measured for ten plant species.
  • Upon severe drought stress, RWC could distinguish non-tolerant from tolerant species as early as 3 days after drought treatment (DAD).
  • Fv/Fm could be measured conveniently and is also highly informative for indicating drought tolerance.
  • We identified two groundcover plant species: Sesuvium portulacastrum and Callisia repens with high drought tolerant ability, and should be considered for extensive green roof architecture in the tropical areas.

Meetam M, Sripintusorn N, Songnuan W, Siriwattanakul U, Pichakum A. Assessment of physiological parameters to determine drought tolerance of plants for extensive green roof architecture in tropical areas. Urban For Urban Green 2020;56:126874. https://doi.org/10.1016/j.ufug.2020.126874