Genotypic Variation in Photosynthesis and Biomass Partitioning Underlies Agronomic Performance and Cannabinoid Profile in <i>Cannabis sativa</i> Under Drought.

ABSTRACT: Drought is a major constraint on Cannabis sativa productivity and cannabinoid yield, yet the physiological mechanisms underlying genotypic variation in drought responses remain poorly understood. We hypothesized that (i) more vigorous genotypes would sustain higher photosynthetic rates, (ii) drought would constrain photosynthesis through both diffusional and non-diffusional limitations, and (iii) water deficits would alter cannabinoid production in a genotype-dependent manner. To test these hypotheses, two contrasting genotypes (one tetrahydrocannabinol- (THC) dominant and another cannabidiol- (CBD) dominant) were grown under greenhouse conditions, with water deficit imposed at early flowering. Water deficit induced neither osmotic nor elastic adjustment in either genotype. Although

SUBMITTER: Pena MM 

PROVIDER: S-EPMC12736467 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature