Far-red light effects on plant photosynthesis: from short-term enhancements to long-term effects of artificial solar light.

ABSTRACT:

Background and aims

Long-term exposure over several days to far-red light (FR) increases leaf expansion, whereas short-term exposure (minutes) might enhance the photosystem II operating efficiency (ϕPSII). The interaction between these responses at different time scales and their impact on photosynthesis at the whole-plant level are not well understood. We aimed to assess the effects of FR in an irradiance mimicking the spectrum of sunlight (referred to as artificial solar irradiance), in both the long and short term, on whole-plant CO2 assimilation rates and in leaves at different positions in the plant.

Methods

Tomato (Solanum lycopersicum) plants were grown under artificial solar irradiance conditions with either a severely reduced or normal fraction of FR [SUN(FR-) vs. S

SUBMITTER: Lazzarin M 

PROVIDER: S-EPMC11897601 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature