Mesophyll conductance and N allocation co-explained the variation in photosynthesis in two canola genotypes under contrasting nitrogen supply.

ABSTRACT: The application of nitrogen fertilizer within a normal range has been found to increase the leaf nitrogen content and photosynthetic rate of canola plants (Brassica napus L.). Despite numerous studies on the separate effects of CO₂ diffusion limitation and nitrogen allocation trade-off on photosynthetic rate, few have examined both these factors in relation to the photosynthetic rate of canola. In this study, two genotypes of canola with varying leaf nitrogen content were analyzed to determine the impact of nitrogen supply on leaf photosynthesis, mesophyll conductance, and nitrogen partitioning. The results showed that the CO₂ assimilation rate (A), mesophyll conductance (g _m), and photosynthetic nitrogen content (N _psn

SUBMITTER: Liu J 

PROVIDER: S-EPMC10202220 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature