Dynamic light caused less photosynthetic suppression, rather than more, under nitrogen deficit conditions than under sufficient nitrogen supply conditions in soybean.

ABSTRACT:

Background

Plants are always exposed to dynamic light. The photosynthetic light use efficiency of leaves is lower in dynamic light than in uniform irradiance. Research on the influence of environmental factors on dynamic photosynthesis is very limited. Nitrogen is critical for plants, especially for photosynthesis. Low nitrogen (LN) decreases ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and thus limits photosynthesis. The decrease in Rubisco also delays photosynthetic induction in LN leaves; therefore, we hypothesized that the difference of photosynthetic CO₂ fixation between uniform and dynamic light will be greater in LN leaves compared to leaves with sufficient nitrogen supply.

Results

To test this hypothesis, soybean plants were grown under low or

SUBMITTER: Li YT 

PROVIDER: S-EPMC7368695 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature